2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1771
The ECM detects that the TP sensor 1 voltage is greater than 4.75 V for greater than 1 s.
P0220
The TP sensor 2 voltage is less than 0.25 V or greater than 4.59 V for greater than 1 s.
P0222
The ECM detects that the TP sensor 2 voltage is less than 0.25 V for greater than 1 s.
P0223
The ECM detects that the TP sensor 2 voltage is greater than 4.59 V for greater than 1 s.
P2135
The difference between the TP sensor 1 and TP sensor 2 exceeds a predetermined value for greater than 2 s.
Action Taken When the DTC Sets
* DTC P0120, P0122, P0123, P0220, P0222, P0223, and P2135 are Type A DTCs.
* The control module commands the TAC system to operate in the Reduced Engine Power mode.
* A message center or an indicator displays Reduced Engine Power.
* Under certain conditions the control module commands the engine OFF.
Conditions for Clearing the MIL/DTC
DTCs P0120, P0122, P0123, P0220, P0222, P0223, and P2135 are Type A DTCs.
Diagnostic Aids
* If the Throttle Sweep Test is not available on the scan tool, observe the scan tool TP Sensor 1 and 2 Agree/Disagree parameter while
performing the following tests:
- Slowly depress the accelerator pedal to WOT and then slowly return the pedal to closed throttle. Repeat the procedure several times.
- Rapidly depress the accelerator pedal from the rest position to the wide open throttle position (WOT) and release pedal. Repeat the
procedure several times.
The TP Sensor 1 and 2 Agree/Disagree parameter should display Agree. If Disagree is displayed, continue diagnosis in Circuit/System
Testing.
* A high resistance condition on the throttle position and throttle actuator control circuits could cause a DTC to set.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Throttle Actuator Control (TAC) System Description (See: Powertrain Management/Computers and Control Systems/Description and
Operation/Throttle Actuator Control (TAC) System Description)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Saturday, October 31, 2020
2010 Cadillac Truck SRX AWD V6-3.0L Page 1150
2010 Cadillac Truck SRX AWD V6-3.0L Page 1150
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Ignition ON, observe the DTC information with a scan tool. Verify DTC P06A3 is not set.
瀚慖f the DTC is set, refer to DTC P0641, P0651, P0697, or P06A3 (LF1) (See: P Code Charts/P0641/ECM).
2. Ignition ON, observe both Throttle Position Sensor voltage parameters with a scan tool. Verify the scan tool Throttle Position Sensor 1 and 2
parameters are between 1.0-4.0 V.
3. Perform the scan tool Throttle Sweep Test while observing the Throttle Position Sensors 1 and 2 Agree/Disagree parameter. The parameter
should display Agree.
4. Observe the DTC Information with a scan tool. DTCs P0121, P0122, P0123, P0222, P0223, and P2135 should not set.
5. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the
conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the Q38 throttle body assembly.
2. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 ohm
between the low reference circuit terminal C and ground.
瀚慖f greater than the specified range, test the low reference circuit for a short to voltage, or an open/high resistance. If the circuit tests
normal, replace the K20 ECM.
3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal E and ground.
瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or open/high resistance. If the circuit tests normal,
replace the K20 ECM.
瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
4. Test for less than 1 V between the TP sensor 1 signal circuit terminal D and ground.
瀚慖f greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
5. Test for 4.8-5.2 V between the TP sensor 2 signal circuit terminal F and ground.
瀚慖f less than specified range, test the signal circuit for a short to ground, or an open/high resistance. If the circuit tests normal, replace the
K20 ECM.
瀚慖f greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
6. Install a 3 A fused jumper wire between TP sensor 1 signal circuit terminal D and the 5 V reference circuit terminal E. Verify the scan tool
TP sensor 1 voltage parameter is greater than 4.8 V.
瀚慖f less than the specified range, test the signal circuit for a short to ground, or an open/high resistance. If the circuit tests normal, replace
the K20 ECM.
7. If all circuits test normal, test or replace the Q38 throttle body assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Throttle Body Assembly Replacement (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Throttle Body/Service and
Repair/Removal and Replacement)Throttle Body Assembly Replacement (LAU) (See: Powertrain Management/Fuel Delivery and Air
Induction/Throttle Body/Service and Repair/Removal and Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, programming, and setup
P0123
DTC P0121-P0123, P0222, P0223, or P2135 (LF1, LFW)
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1770
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1770
DTC P0223
- Throttle Position (TP) Sensor 2 Circuit High Voltage
DTC P2135
- Throttle Position (TP) Sensor 1-2 Correlation
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The throttle body assembly contains 2 throttle position (TP) sensors. The TP sensors are mounted to the throttle body assembly and are not
serviceable. The TP sensors provide a signal voltage that changes relative to throttle blade angle. The engine control module (ECM) supplies the TP
sensors with a common 5 V reference circuit, a common low reference circuit, and two independent signal circuits.
The TP sensors have opposite functionality. TP sensor 1 signal voltage decreases and TP sensor 2 signal voltage increases as the accelerator pedal
increases to wide open throttle (WOT).
Conditions for Running the DTC
* DTC P0641 or P0651 is not set.
* The run/crank or powertrain relay voltage is greater than 6 V and reduced power is not active.
* The ignition is ON or the engine is operating.
* DTC P0120, P0122, P0123, P0220, P0222, P0223, P2135 run continuously when the above conditions are met.
Conditions for Setting the DTC
P0120
TP sensor 1 voltage is less than 0.325 V or greater than 4.75 V for greater than 1 s.
P0122
The ECM detects that the TP sensor 1 voltage is less than 0.325 V for greater than 1 s.
DTC P0223
- Throttle Position (TP) Sensor 2 Circuit High Voltage
DTC P2135
- Throttle Position (TP) Sensor 1-2 Correlation
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The throttle body assembly contains 2 throttle position (TP) sensors. The TP sensors are mounted to the throttle body assembly and are not
serviceable. The TP sensors provide a signal voltage that changes relative to throttle blade angle. The engine control module (ECM) supplies the TP
sensors with a common 5 V reference circuit, a common low reference circuit, and two independent signal circuits.
The TP sensors have opposite functionality. TP sensor 1 signal voltage decreases and TP sensor 2 signal voltage increases as the accelerator pedal
increases to wide open throttle (WOT).
Conditions for Running the DTC
* DTC P0641 or P0651 is not set.
* The run/crank or powertrain relay voltage is greater than 6 V and reduced power is not active.
* The ignition is ON or the engine is operating.
* DTC P0120, P0122, P0123, P0220, P0222, P0223, P2135 run continuously when the above conditions are met.
Conditions for Setting the DTC
P0120
TP sensor 1 voltage is less than 0.325 V or greater than 4.75 V for greater than 1 s.
P0122
The ECM detects that the TP sensor 1 voltage is less than 0.325 V for greater than 1 s.
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2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1769
3. Turn ON the ignition, with the engine OFF.
4. Use the scan tool to verify the proper operation of the engine cooling system fans.
5. Turn OFF the ignition.
6. Verify the proper heat range, and the operation of the thermostat. Refer to Thermostat Diagnosis (See: Engine, Cooling and
Exhaust/Cooling System/Testing and Inspection/Symptom Related Diagnostic Procedures/Thermostat Diagnosis).
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
2. Ignition OFF for 90 s, test for less than 5 ohm between the low reference circuit terminal A and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20
ECM.
3. Ignition ON, verify the scan tool ECT parameter is colder than -39掳C (-38掳F).
瀚慖f greater than the specified range, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the K20 ECM.
4. Install a 3 A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal A. Verify the scan tool ECT
parameter is greater than 149掳C (300掳F).
瀚慖f less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the K20 ECM.
5. If all circuits test normal, test or replace the B34 ECT sensor.
Component Testing
Measure and record the resistance of the ECT sensor at various ambient temperatures, then compare those measurements to the Temperature vs
Resistance table. Refer to Temperature Versus Resistance (See: Powertrain Management/Computers and Control
Systems/Specifications/Temperature Versus Resistance).
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Engine Coolant Temperature Sensor Replacement (See: Engine, Cooling and Exhaust/Cooling System/Engine - Coolant Temperature
Sensor/Switch/Coolant Temperature Sensor/Switch (For Computer)/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0120
DTC P0120, P0122, P0123, P0220, P0222, P0223, or P2135
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0120
- Throttle Position (TP) Sensor 1 Circuit
DTC P0122
- Throttle Position (TP) Sensor 1 Circuit Low Voltage
DTC P0123
- Throttle Position (TP) Sensor 1 Circuit High Voltage
DTC P0220
- Throttle Position (TP) Sensor 2 Circuit
DTC P0222
- Throttle Position (TP) Sensor 2 Circuit Low Voltage
3. Turn ON the ignition, with the engine OFF.
4. Use the scan tool to verify the proper operation of the engine cooling system fans.
5. Turn OFF the ignition.
6. Verify the proper heat range, and the operation of the thermostat. Refer to Thermostat Diagnosis (See: Engine, Cooling and
Exhaust/Cooling System/Testing and Inspection/Symptom Related Diagnostic Procedures/Thermostat Diagnosis).
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
2. Ignition OFF for 90 s, test for less than 5 ohm between the low reference circuit terminal A and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20
ECM.
3. Ignition ON, verify the scan tool ECT parameter is colder than -39掳C (-38掳F).
瀚慖f greater than the specified range, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the K20 ECM.
4. Install a 3 A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal A. Verify the scan tool ECT
parameter is greater than 149掳C (300掳F).
瀚慖f less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the K20 ECM.
5. If all circuits test normal, test or replace the B34 ECT sensor.
Component Testing
Measure and record the resistance of the ECT sensor at various ambient temperatures, then compare those measurements to the Temperature vs
Resistance table. Refer to Temperature Versus Resistance (See: Powertrain Management/Computers and Control
Systems/Specifications/Temperature Versus Resistance).
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Engine Coolant Temperature Sensor Replacement (See: Engine, Cooling and Exhaust/Cooling System/Engine - Coolant Temperature
Sensor/Switch/Coolant Temperature Sensor/Switch (For Computer)/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0120
DTC P0120, P0122, P0123, P0220, P0222, P0223, or P2135
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0120
- Throttle Position (TP) Sensor 1 Circuit
DTC P0122
- Throttle Position (TP) Sensor 1 Circuit Low Voltage
DTC P0123
- Throttle Position (TP) Sensor 1 Circuit High Voltage
DTC P0220
- Throttle Position (TP) Sensor 2 Circuit
DTC P0222
- Throttle Position (TP) Sensor 2 Circuit Low Voltage
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2010 Cadillac CTS Sedan AWD V6-3.0L Page 1953
瀚慖f less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit/connection tests normal,
replace the K20 ECM.
瀚慖f greater than the specified range, test the circuit for a short to voltage. If the circuit/connection tests normal, replace the K20 ECM.
4. Connect a test lamp between the each of the ground circuits terminal A, and terminal B, and B+. The test lamp should illuminate on each
circuit.
瀚慖f the test lamp does not illuminate, test the suspected circuit for an open/high resistance.
5. If all circuits/connections test normal, replace the T8 ignition coil.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Ignition Coil Replacement - Bank 1 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil
Replacement - Bank 1)
* Ignition Coil Replacement - Bank 2 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil
Replacement - Bank 2)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P2306
DTC P0351-P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 (w/LLT)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0351
- Ignition Coil 1 Control Circuit
DTC P0352
- Ignition Coil 2 Control Circuit
DTC P0353
- Ignition Coil 3 Control Circuit
DTC P0354
- Ignition Coil 4 Control Circuit
DTC P0355
- Ignition Coil 5 Control Circuit
DTC P0356
- Ignition Coil 6 Control Circuit
DTC P2300
- Ignition Coil 1 Control Circuit Low Voltage
DTC P2301
- Ignition Coil 1 Control Circuit High Voltage
DTC P2303
- Ignition Coil 2 Control Circuit Low Voltage
DTC P2304
- Ignition Coil 2 Control Circuit High Voltage
DTC P2306
- Ignition Coil 3 Control Circuit Low Voltage
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2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1768
P0117
* The engine is running for greater than 10 s.
OR
* The ignition is ON when the intake air temperature (IAT) is less than 50掳C (122掳F).
* This DTC runs continuously when the above conditions are met.
P0118
* The engine is running for greater than 10 s.
OR
* The ignition is ON when the IAT is greater than 0掳C (32掳F).
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0117
The ECM detects that the ECT is warmer than 150掳C (302掳F) for greater than 5 s.
P0118
The ECM detects that the ECT is colder than -60掳C (-76掳F) for greater than 5 s.
Action Taken When the DTC Sets
DTCs P0117 and P0118 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0117 and P0118 are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Warning
Under pressure, the temperature of the solution in the radiator can be considerably higher, without boiling. Removing the radiator cap while the
engine is hot (pressure is high), will cause the solution to boil instantaneously, with explosive force. The solution will spew out over the engine,
fenders, and the person removing the cap. Serious bodily injury may result. Flammable antifreeze, such as alcohol, is not recommended for use at
any time. Flammable antifreeze could cause a serious fire.
1. Turn OFF the ignition.
2. Inspect the cooling system surge tank for the proper engine coolant level. Refer to Cooling System Leak Testing (See: Engine, Cooling and
Exhaust/Cooling System/Testing and Inspection/Component Tests and General Diagnostics) and Cooling System Draining and Filling (Static
Fill) (See: Engine, Cooling and Exhaust/Cooling System/Service and Repair/Cooling System Draining and Filling (Static Fill)).
P0117
* The engine is running for greater than 10 s.
OR
* The ignition is ON when the intake air temperature (IAT) is less than 50掳C (122掳F).
* This DTC runs continuously when the above conditions are met.
P0118
* The engine is running for greater than 10 s.
OR
* The ignition is ON when the IAT is greater than 0掳C (32掳F).
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0117
The ECM detects that the ECT is warmer than 150掳C (302掳F) for greater than 5 s.
P0118
The ECM detects that the ECT is colder than -60掳C (-76掳F) for greater than 5 s.
Action Taken When the DTC Sets
DTCs P0117 and P0118 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0117 and P0118 are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Warning
Under pressure, the temperature of the solution in the radiator can be considerably higher, without boiling. Removing the radiator cap while the
engine is hot (pressure is high), will cause the solution to boil instantaneously, with explosive force. The solution will spew out over the engine,
fenders, and the person removing the cap. Serious bodily injury may result. Flammable antifreeze, such as alcohol, is not recommended for use at
any time. Flammable antifreeze could cause a serious fire.
1. Turn OFF the ignition.
2. Inspect the cooling system surge tank for the proper engine coolant level. Refer to Cooling System Leak Testing (See: Engine, Cooling and
Exhaust/Cooling System/Testing and Inspection/Component Tests and General Diagnostics) and Cooling System Draining and Filling (Static
Fill) (See: Engine, Cooling and Exhaust/Cooling System/Service and Repair/Cooling System Draining and Filling (Static Fill)).
2010 Cadillac Truck SRX AWD V6-3.0L Page 97
2010 Cadillac Truck SRX AWD V6-3.0L Page 97
- SDM wiring harness connector
- Roof rail air bag wiring harness connector
- Seat side air bag wiring harness connector
- Passenger instrument panel air bag wiring harness connector
- Seat belt retractor pretensioner wiring harness connector
* The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an
audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.
* If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct
the high resistance condition due to terminal fretting corrosion.
Observe the scan tool Deployment Loop Resistance parameters while moving the harness near each connector listed below. The reading should stay
consistently between 1.7 and 4.2 ohm without any drop outs or spikes.
* F105 Passenger instrument panel air bag, and Roof rail air bag
* F106 Seat side air bag
* F112 Seat belt retractor pretensioner
* Any inline harness
* K36 SDM
If the reading is erratic while moving the harness, perform the following:
* Inspect each connector terminal for damage or corrosion and repair as necessary.
* Apply Nyogel lubricant 760G to each connector terminal.
* Insure each connector and CPA is correctly seated.
Circuit/System Testing
DTC B0014-B0018 or B0021-B0045
1. Ignition OFF, disconnect the harness connector at the appropriate F105, F106 air bag or F112 seat belt retractor pretensioner.
2. Ignition OFF, disconnect the scan tool, wait 120 seconds, test for greater than 25 ohm between the control circuit terminals listed below:
* F105 Left roof rail airbag terminal 1 and 2
* F105 Right roof rail airbag terminal 1 and 2
* F106 Driver seat side airbag terminal 1 and 2
* F106 Passenger seat side airbag terminal 1 and 2
* F112 Driver seat belt retractor pretensioner terminal 1 and 2
* F112 Passenger seat belt retractor pretensioner terminal 1 and 2
瀚慖f less than the specified range, test for a short between the control circuits, check each connector and CPA to ensure that the shorting
bars are lifted. If the circuits and shorting bars tests normal, replace the K36 SDM.
3. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground:
* F105 roof rail air bag or F106 seat side air bag control circuit terminal 1
* F105 roof rail air bag or F106 seat side air bag control circuit terminal 2
* F112 seat belt retractor pretensioner control circuit terminal 1
* F112 seat belt retractor pretensioner control circuit terminal 2
瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K36 SDM.
4. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground:
* F105 roof rail air bag or F106 seat side air bag control circuit terminal 1
* F105 roof rail air bag or F106 seat side air bag control circuit terminal 2
* F112 seat belt retractor pretensioner control circuit terminal 1
* F112 seat belt retractor pretensioner control circuit terminal 2
瀚慖f less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the K36 SDM.
5. Install a 3 A fused jumper wire between the control circuit terminals listed below:
* F105 Left roof rail air bag terminal 1 and 2
* F105 Right roof rail air bag terminal 1 and 2
* F106 Driver seat side air bag terminal 1 and 2
* F106 Passenger seat side air bag terminal 1 and 2
* F112 Driver seat belt retractor pretensioner terminal 1 and 2
* F112 Passenger seat belt retractor pretensioner terminal 1 and 2
6. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohm.
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1767
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1767
4. Install a 3 A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal A. Verify the scan tool ECT
parameter is greater than 149掳C (300掳F).
瀚慖f less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the K20 ECM.
5. If all circuits test normal, test or replace the B34 ECT sensor.
Component Testing
Measure and record the resistance of the ECT sensor at various ambient temperatures, then compare those measurements to the Temperature vs
Resistance table. Refer to Temperature Versus Resistance (See: Powertrain Management/Computers and Control
Systems/Specifications/Temperature Versus Resistance).
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Engine Coolant Temperature Sensor Replacement (See: Engine, Cooling and Exhaust/Cooling System/Engine - Coolant Temperature
Sensor/Switch/Coolant Temperature Sensor/Switch (For Computer)/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0118
DTC P0117 or P0118 (Without L96)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0117
- Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
DTC P0118
- Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module
(ECM) supplies 5 V to the ECT signal circuit and supplies a ground to the low reference circuit.
Conditions for Running the DTC
4. Install a 3 A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal A. Verify the scan tool ECT
parameter is greater than 149掳C (300掳F).
瀚慖f less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the K20 ECM.
5. If all circuits test normal, test or replace the B34 ECT sensor.
Component Testing
Measure and record the resistance of the ECT sensor at various ambient temperatures, then compare those measurements to the Temperature vs
Resistance table. Refer to Temperature Versus Resistance (See: Powertrain Management/Computers and Control
Systems/Specifications/Temperature Versus Resistance).
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Engine Coolant Temperature Sensor Replacement (See: Engine, Cooling and Exhaust/Cooling System/Engine - Coolant Temperature
Sensor/Switch/Coolant Temperature Sensor/Switch (For Computer)/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0118
DTC P0117 or P0118 (Without L96)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0117
- Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
DTC P0118
- Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module
(ECM) supplies 5 V to the ECT signal circuit and supplies a ground to the low reference circuit.
Conditions for Running the DTC
2010 Cadillac CTS Sedan AWD V6-3.0L Page 1619
2010 Cadillac CTS Sedan AWD V6-3.0L Page 1619
5. Inspect the machined teeth on the 1-2-3-4 and 3-5 clutch housing outer surface for damage or misalignment. Repair or replace as necessary.
6. If all of the above test normal, replace the B14A/B14C ISS/OSS assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Perform the Input and Output Speed Sensor Replacement (See: Powertrain Management/Transmission Control Systems/Sensors and
Switches - Transmission and Drivetrain/Sensors and Switches - A/T/Transmission Speed Sensor/Service and Repair).
* Control solenoid valve assembly - refer to Control Module References (See: Testing and Inspection/Programming and Relearning) for
replacement, setup, and programming.
* Perform the Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test (See:
Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/Control
Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test).
* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and
Inspection/Programming and Relearning/Service Fast Learn Adapts) following all transmission related repairs.
P0717
DTC P0716 or P0717
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0716
- Input Speed Sensor Performance
DTC P0717
- Input Speed Sensor Circuit Low Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The automatic transmission (AT) input and output speed sensor (ISS and OSS) assembly each are part of a single harness. The ISS is a hall-effect
type sensor. The ISS/OSS mounts to the control valve upper body assembly. The ISS sensor end faces the splines on the 1-2-3-4 and 3-5-R clutch
housing outside diameter surface. The sensor receives 8.3-9.3 volts on the ISS/OSS supply voltage circuit from the control solenoid valve
assembly. As the 1-2-3-4 and 3-5-R clutch housing rotates, the sensor produces a signal frequency based on the splines on the clutch housing
outside diameter surface. This signal is transmitted through the ISS signal circuit to the control solenoid valve assembly. The control solenoid valve
assembly uses the ISS signal to determine line pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1766
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1766
P0118
The ECM detects that the ECT is colder than -60掳C (-76掳F) for greater than 5 s.
Action Taken When the DTC Sets
DTCs P0117 and P0118 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0117 and P0118 are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Warning
Under pressure, the temperature of the solution in the radiator can be considerably higher, without boiling. Removing the radiator cap while the
engine is hot (pressure is high), will cause the solution to boil instantaneously, with explosive force. The solution will spew out over the engine,
fenders, and the person removing the cap. Serious bodily injury may result. Flammable antifreeze, such as alcohol, is not recommended for use at
any time. Flammable antifreeze could cause a serious fire.
1. Turn OFF the ignition.
2. Inspect the cooling system surge tank for the proper engine coolant level. Refer to Cooling System Leak Testing (See: Engine, Cooling and
Exhaust/Cooling System/Testing and Inspection/Component Tests and General Diagnostics) and Cooling System Draining and Filling (Static
Fill) (See: Engine, Cooling and Exhaust/Cooling System/Service and Repair/Cooling System Draining and Filling (Static Fill)).
3. Turn ON the ignition, with the engine OFF.
4. Use the scan tool to verify the proper operation of the engine cooling system fans.
5. Turn OFF the ignition.
6. Verify the proper heat range, and the operation of the thermostat. Refer to Thermostat Diagnosis (See: Engine, Cooling and
Exhaust/Cooling System/Testing and Inspection/Symptom Related Diagnostic Procedures/Thermostat Diagnosis).
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
2. Ignition OFF for 90 s, test for less than 5 ohm between the low reference circuit terminal A and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20
ECM.
3. Ignition ON, verify the scan tool ECT parameter is colder than -39掳C (-38掳F).
瀚慖f greater than the specified range, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the K20 ECM.
P0118
The ECM detects that the ECT is colder than -60掳C (-76掳F) for greater than 5 s.
Action Taken When the DTC Sets
DTCs P0117 and P0118 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0117 and P0118 are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Warning
Under pressure, the temperature of the solution in the radiator can be considerably higher, without boiling. Removing the radiator cap while the
engine is hot (pressure is high), will cause the solution to boil instantaneously, with explosive force. The solution will spew out over the engine,
fenders, and the person removing the cap. Serious bodily injury may result. Flammable antifreeze, such as alcohol, is not recommended for use at
any time. Flammable antifreeze could cause a serious fire.
1. Turn OFF the ignition.
2. Inspect the cooling system surge tank for the proper engine coolant level. Refer to Cooling System Leak Testing (See: Engine, Cooling and
Exhaust/Cooling System/Testing and Inspection/Component Tests and General Diagnostics) and Cooling System Draining and Filling (Static
Fill) (See: Engine, Cooling and Exhaust/Cooling System/Service and Repair/Cooling System Draining and Filling (Static Fill)).
3. Turn ON the ignition, with the engine OFF.
4. Use the scan tool to verify the proper operation of the engine cooling system fans.
5. Turn OFF the ignition.
6. Verify the proper heat range, and the operation of the thermostat. Refer to Thermostat Diagnosis (See: Engine, Cooling and
Exhaust/Cooling System/Testing and Inspection/Symptom Related Diagnostic Procedures/Thermostat Diagnosis).
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
2. Ignition OFF for 90 s, test for less than 5 ohm between the low reference circuit terminal A and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20
ECM.
3. Ignition ON, verify the scan tool ECT parameter is colder than -39掳C (-38掳F).
瀚慖f greater than the specified range, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the K20 ECM.
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1765
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1765
* Engine Coolant Temperature Sensor Replacement (See: Engine, Cooling and Exhaust/Cooling System/Engine - Coolant Temperature
Sensor/Switch/Coolant Temperature Sensor/Switch (For Computer)/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0117
DTC P0117 or P0118 (Without L96)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0117
- Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
DTC P0118
- Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module
(ECM) supplies 5 V to the ECT signal circuit and supplies a ground to the low reference circuit.
Conditions for Running the DTC
P0117
* The engine is running for greater than 10 s.
OR
* The ignition is ON when the intake air temperature (IAT) is less than 50掳C (122掳F).
* This DTC runs continuously when the above conditions are met.
P0118
* The engine is running for greater than 10 s.
OR
* The ignition is ON when the IAT is greater than 0掳C (32掳F).
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0117
The ECM detects that the ECT is warmer than 150掳C (302掳F) for greater than 5 s.
* Engine Coolant Temperature Sensor Replacement (See: Engine, Cooling and Exhaust/Cooling System/Engine - Coolant Temperature
Sensor/Switch/Coolant Temperature Sensor/Switch (For Computer)/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0117
DTC P0117 or P0118 (Without L96)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0117
- Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
DTC P0118
- Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module
(ECM) supplies 5 V to the ECT signal circuit and supplies a ground to the low reference circuit.
Conditions for Running the DTC
P0117
* The engine is running for greater than 10 s.
OR
* The ignition is ON when the intake air temperature (IAT) is less than 50掳C (122掳F).
* This DTC runs continuously when the above conditions are met.
P0118
* The engine is running for greater than 10 s.
OR
* The ignition is ON when the IAT is greater than 0掳C (32掳F).
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0117
The ECM detects that the ECT is warmer than 150掳C (302掳F) for greater than 5 s.
2010 Cadillac Truck SRX AWD V6-3.0L Page 1348
2010 Cadillac Truck SRX AWD V6-3.0L Page 1348
3. Ignition ON, connect a test lamp between the appropriate high voltage supply circuit and the high voltage control circuit. The Injector
Control Circuit Status should transition from Open to OK.
瀚慖f not the specified value, test for the following conditions in the ECM side of the harness:
* An open/high resistance in the high voltage supply circuit
* An open/high resistance in the high voltage control circuit
* A short to ground in the high voltage control circuit
* A short to voltage in the high voltage supply circuit
瀚慖f the circuits test normal, replace the K20 ECM.
Note: Testing for the following steps is performed on the fuel injector side of the multi-way harness connector. It may be necessary to
remove the intake manifold to isolate the condition.
4. Ignition OFF, measure the resistance between the appropriate high voltage supply circuit and ground. The DMM should display OL ohm.
瀚慖f less than the specified range, test the high voltage supply circuit and the high voltage control circuit for a short to ground. If the
circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).
5. Test for 2-3 ohm between the appropriate high voltage supply circuit and high voltage control circuit.
瀚慖f less than the specified range, test for a short between the high voltage supply circuit and high voltage control circuit. If the
circuits/connections test normal, test or replace the appropriate Q17 fuel injector(s).
瀚慖f greater than the specified range, test the high voltage supply circuit and high voltage control circuit for an open/high resistance. If the
circuits/connections test normal, test or replace the appropriate Q17 fuel injector.
Component Testing
* Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection
)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and
Inspection)
* Fuel Injector Balance Test (LAU) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests
and General Diagnostics/Fuel Injector Balance Test)Fuel Injector Balance Test (LF1, LFW) (See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector Balance Test)
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel
Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 1)
* Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel
Rail/Service and Repair/Fuel Injection Fuel Rail Assembly Replacement - Bank 2)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0265
DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277
(LF1)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0201
- Cylinder 1 Injector Control Circuit
DTC P0202
- Cylinder 2 Injector Control Circuit
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1764
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1764
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Ignition OFF, inspect the cooling system surge tank for the proper coolant level. Refer to Cooling System Leak Testing (See: Engine,
Cooling and Exhaust/Cooling System/Testing and Inspection/Component Tests and General Diagnostics) and Cooling System Draining and
Filling (Static Fill) (See: Engine, Cooling and Exhaust/Cooling System/Service and Repair/Cooling System Draining and Filling (Static Fill)
).
2. Inspect the thermostatically-controlled coolant heater, if equipped, for damage or modifications. Test for proper operation of the coolant
heater. Refer to Coolant Heater Inoperative (See: Engine, Cooling and Exhaust/Cooling System/Testing and Inspection/Symptom Related
Diagnostic Procedures/Coolant Heater Inoperative).
3. Ignition OFF for 8 h or greater.
4. Ignition ON, observe the scan tool IAT and ECT sensor parameters. The ECT, IAT, and ambient temperature should be within 6掳C (11掳F) of
each other.
5. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the
conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
2. Ignition OFF for 90 s, test for less than 5 ohm between the low reference circuit terminal A and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20
ECM.
3. Ignition ON, verify the scan tool ECT parameter is colder than -39掳C (-38掳F).
瀚慖f greater than the specified range, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the K20 ECM.
4. Install a 3 A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal A. Verify the scan tool ECT
parameter is greater than 149掳C (300掳F).
瀚慖f less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the K20 ECM.
5. If all circuits test normal, test or replace the B34 ECT sensor.
6. Inspect for the proper operation of the OEM block heater cord by verifying that the thermostat has turned OFF the heater at temperatures
warmer than -10掳 (+14掳F).
Component Testing
Measure and record the resistance of the ECT sensor at various ambient temperatures, then compare those measurements to the Temperature Versus
Resistance (See: Powertrain Management/Computers and Control Systems/Specifications/Temperature Versus Resistance).
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Ignition OFF, inspect the cooling system surge tank for the proper coolant level. Refer to Cooling System Leak Testing (See: Engine,
Cooling and Exhaust/Cooling System/Testing and Inspection/Component Tests and General Diagnostics) and Cooling System Draining and
Filling (Static Fill) (See: Engine, Cooling and Exhaust/Cooling System/Service and Repair/Cooling System Draining and Filling (Static Fill)
).
2. Inspect the thermostatically-controlled coolant heater, if equipped, for damage or modifications. Test for proper operation of the coolant
heater. Refer to Coolant Heater Inoperative (See: Engine, Cooling and Exhaust/Cooling System/Testing and Inspection/Symptom Related
Diagnostic Procedures/Coolant Heater Inoperative).
3. Ignition OFF for 8 h or greater.
4. Ignition ON, observe the scan tool IAT and ECT sensor parameters. The ECT, IAT, and ambient temperature should be within 6掳C (11掳F) of
each other.
5. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the
conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
2. Ignition OFF for 90 s, test for less than 5 ohm between the low reference circuit terminal A and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20
ECM.
3. Ignition ON, verify the scan tool ECT parameter is colder than -39掳C (-38掳F).
瀚慖f greater than the specified range, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the K20 ECM.
4. Install a 3 A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal A. Verify the scan tool ECT
parameter is greater than 149掳C (300掳F).
瀚慖f less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the K20 ECM.
5. If all circuits test normal, test or replace the B34 ECT sensor.
6. Inspect for the proper operation of the OEM block heater cord by verifying that the thermostat has turned OFF the heater at temperatures
warmer than -10掳 (+14掳F).
Component Testing
Measure and record the resistance of the ECT sensor at various ambient temperatures, then compare those measurements to the Temperature Versus
Resistance (See: Powertrain Management/Computers and Control Systems/Specifications/Temperature Versus Resistance).
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1763
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1763
DTC P0116
- Engine Coolant Temperature (ECT) Sensor Performance
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module
(ECM) supplies 5 V to the ECT sensor signal circuit, and supplies a ground to the low reference circuit. The ECM uses this high side coolant
rationality diagnostic to determine if the input from the ECT sensor is skewed warmer than normal. The internal clock of the ECM will record the
amount of time the ignition is OFF. If the calibrated ignition OFF timer is met at start-up, the ECM will compare the temperature difference
between the ECT and the intake air temperature (IAT), to determine if the temperatures are within an acceptable operating range of each other.
Conditions for Running the DTC
* DTCs P0112, P0113, P0117, P0118, P0502, P0503, P0601, P0603, P062F, P2610 are not set.
* The vehicle has had a minimum ignition OFF time of 8 h.
* The ignition is ON.
* The start-up IAT is greater than -7掳C (+19掳F).
* The Fuel Level Sensor is greater than 5 %.
* This DTC runs once per cold start when the above conditions are met.
Conditions for Setting the DTC
* The ECM detects a temperature difference at power-up that indicates that the ECT sensor is 30掳C (54掳F) greater than the IAT sensor.
OR
* The ECM detects a temperature difference at power-up that indicates that the ECT sensor is 10掳C (18掳F) greater than the IAT sensor, and the
time spent cranking the engine is greater than 10 s, when the fuel level is greater than 5 %.
OR
* With the power-up IAT more than -7掳C (+19掳F), the ECM detects a temperature difference at power-up that indicates that the ECT sensor is
20掳C (36掳F) greater than the IAT sensor. Then the vehicle must be driven for more than 6 min and 40 s at greater than 40 km/h (25 mph). If
the IAT sensor then decreases greater than 4掳C (7掳F), an engine block heater was detected and the test is aborted. If the IAT sensor does not
decrease, an engine block heater was not detected and DTC P0116 will set.
Action Taken When the DTC Sets
DTC P0116 is a Type B DTC.
Conditions for Clearing the MIL/DTC
DTC P0116 is a Type B DTC.
Diagnostic Aids
* The use of non-thermostatically controlled aftermarket block heater will cause this DTC to set.
* Inspect the ECT sensor terminals for corrosion and for engine coolant leaking through the sensor. Engine coolant that is leaking through the
sensor will create a high resistance short to ground. This condition results in less voltage on the ECT sensor signal circuit, which is
interpreted by the ECM as a warmer ECT.
* An IAT sensor that is skewed colder at various ambient temperatures due to greater resistance than is normal will increase the range between
these two sensors. Measure and record the resistance of the IAT sensor at various ambient temperatures, then compare those measurements to
the Temperature vs Resistance table. Refer to Temperature Versus Resistance (See: Powertrain Management/Computers and Control
Systems/Specifications/Temperature Versus Resistance).
* A slight to moderate resistance in the IAT sensor signal circuit or low reference circuit will increase the range between these two sensors.
This condition results in a greater voltage on the IAT sensor signal circuit, which is interpreted by the ECM as a colder IAT.
DTC P0116
- Engine Coolant Temperature (ECT) Sensor Performance
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module
(ECM) supplies 5 V to the ECT sensor signal circuit, and supplies a ground to the low reference circuit. The ECM uses this high side coolant
rationality diagnostic to determine if the input from the ECT sensor is skewed warmer than normal. The internal clock of the ECM will record the
amount of time the ignition is OFF. If the calibrated ignition OFF timer is met at start-up, the ECM will compare the temperature difference
between the ECT and the intake air temperature (IAT), to determine if the temperatures are within an acceptable operating range of each other.
Conditions for Running the DTC
* DTCs P0112, P0113, P0117, P0118, P0502, P0503, P0601, P0603, P062F, P2610 are not set.
* The vehicle has had a minimum ignition OFF time of 8 h.
* The ignition is ON.
* The start-up IAT is greater than -7掳C (+19掳F).
* The Fuel Level Sensor is greater than 5 %.
* This DTC runs once per cold start when the above conditions are met.
Conditions for Setting the DTC
* The ECM detects a temperature difference at power-up that indicates that the ECT sensor is 30掳C (54掳F) greater than the IAT sensor.
OR
* The ECM detects a temperature difference at power-up that indicates that the ECT sensor is 10掳C (18掳F) greater than the IAT sensor, and the
time spent cranking the engine is greater than 10 s, when the fuel level is greater than 5 %.
OR
* With the power-up IAT more than -7掳C (+19掳F), the ECM detects a temperature difference at power-up that indicates that the ECT sensor is
20掳C (36掳F) greater than the IAT sensor. Then the vehicle must be driven for more than 6 min and 40 s at greater than 40 km/h (25 mph). If
the IAT sensor then decreases greater than 4掳C (7掳F), an engine block heater was detected and the test is aborted. If the IAT sensor does not
decrease, an engine block heater was not detected and DTC P0116 will set.
Action Taken When the DTC Sets
DTC P0116 is a Type B DTC.
Conditions for Clearing the MIL/DTC
DTC P0116 is a Type B DTC.
Diagnostic Aids
* The use of non-thermostatically controlled aftermarket block heater will cause this DTC to set.
* Inspect the ECT sensor terminals for corrosion and for engine coolant leaking through the sensor. Engine coolant that is leaking through the
sensor will create a high resistance short to ground. This condition results in less voltage on the ECT sensor signal circuit, which is
interpreted by the ECM as a warmer ECT.
* An IAT sensor that is skewed colder at various ambient temperatures due to greater resistance than is normal will increase the range between
these two sensors. Measure and record the resistance of the IAT sensor at various ambient temperatures, then compare those measurements to
the Temperature vs Resistance table. Refer to Temperature Versus Resistance (See: Powertrain Management/Computers and Control
Systems/Specifications/Temperature Versus Resistance).
* A slight to moderate resistance in the IAT sensor signal circuit or low reference circuit will increase the range between these two sensors.
This condition results in a greater voltage on the IAT sensor signal circuit, which is interpreted by the ECM as a colder IAT.
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1762
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1762
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Engine idling, observe the scan tool IAT Sensor parameter. The reading should be between -38 to +149掳C (-36 to +300F) depending on the
current ambient temperature and the vehicle operating conditions.
2. Operate the vehicle within the Conditions for Running the DTC to verify that the DTC does not reset. You may also operate the vehicle
within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the MAF/IAT sensor.
2. Ignition OFF, all vehicles systems OFF, this may take up to for 2 min, test for less than 5 ohm between the IAT low reference circuit terminal
A and ground.
瀚慖f greater than the specified range, test the IAT low reference circuit for an open/high resistance. If the circuit tests normal, replace the
ECM.
3. Ignition ON, verify the scan tool IAT parameter is colder than -39掳C (-38掳F).
瀚慖f warmer than the specified range, test the IAT signal circuit terminal B for a short to ground. If the circuit tests normal, replace the
ECM.
4. Install a 3 A fused jumper wire between the IAT signal circuit terminal B and ground. Verify the scan tool IAT parameter is warmer than 149
掳C (300掳F).
瀚慖f colder than the specified range, test the IAT signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,
replace the ECM.
5. If all circuits test normal, test or replace the MAF/IAT sensor.
Component Testing
Measure and record the resistance of the IAT sensor at various ambient temperatures, and then compare those measurements to the Temperature
Versus Resistance (See: Powertrain Management/Computers and Control Systems/Specifications/Temperature Versus Resistance) table.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Air
Flow Meter/Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, programming, and setup
P0116
DTC P0116 (Without L96)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Engine idling, observe the scan tool IAT Sensor parameter. The reading should be between -38 to +149掳C (-36 to +300F) depending on the
current ambient temperature and the vehicle operating conditions.
2. Operate the vehicle within the Conditions for Running the DTC to verify that the DTC does not reset. You may also operate the vehicle
within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the MAF/IAT sensor.
2. Ignition OFF, all vehicles systems OFF, this may take up to for 2 min, test for less than 5 ohm between the IAT low reference circuit terminal
A and ground.
瀚慖f greater than the specified range, test the IAT low reference circuit for an open/high resistance. If the circuit tests normal, replace the
ECM.
3. Ignition ON, verify the scan tool IAT parameter is colder than -39掳C (-38掳F).
瀚慖f warmer than the specified range, test the IAT signal circuit terminal B for a short to ground. If the circuit tests normal, replace the
ECM.
4. Install a 3 A fused jumper wire between the IAT signal circuit terminal B and ground. Verify the scan tool IAT parameter is warmer than 149
掳C (300掳F).
瀚慖f colder than the specified range, test the IAT signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,
replace the ECM.
5. If all circuits test normal, test or replace the MAF/IAT sensor.
Component Testing
Measure and record the resistance of the IAT sensor at various ambient temperatures, and then compare those measurements to the Temperature
Versus Resistance (See: Powertrain Management/Computers and Control Systems/Specifications/Temperature Versus Resistance) table.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Air
Flow Meter/Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, programming, and setup
P0116
DTC P0116 (Without L96)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1761
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1761
Circuit/System Description
The intake air temperature (IAT) sensor, a part of the mass air flow (MAF) sensor assembly, is a variable resistor. The IAT sensor has a signal
circuit and a low reference circuit. The IAT sensor measures the temperature of the air entering the engine. The engine control module (ECM)
supplies 5 V to the IAT signal circuit, and a ground for the IAT low reference circuit.
Conditions for Running the DTC
P0112
* DTCs P0116, P0117, P0118, P0125, P0128, P0722, P0723 are not set.
* The engine is running for greater than 10 s.
* The engine coolant temperature (ECT) is colder than 150掳C (302掳F).
* This DTC runs continuously when the above conditions are met.
P0113
* DTCs P0101, P0102, P0103, P0116, P0117, P0118, P0125, P0128, P0722, P0723 are not set.
* The engine is running for greater than 10 s.
* The ECT is warmer than -40掳C (-40掳F).
* The MAF Sensor signal is equal to or greater than 512 g/s.
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0112
The ECM detects that the IAT sensor signal is warmer than 149掳C (300掳F) for greater than 5 s.
P0113
The ECM detects that the IAT sensor signal is colder than -39掳C (-38掳F) for greater than 5 s.
Action Taken When the DTC Sets
DTCs P0112 and P0113 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0112 and P0113 are Type B DTCs.
Diagnostic Aids
* With the ignition ON, the engine OFF, if the engine is cold, a properly functioning IAT sensor will gradually increase the scan tool IAT
Sensor parameter. This is due to the heat that is generated by the mass air flow (MAF) sensor heating elements.
* Depending on the ambient temperature, an IAT sensor signal circuit or low reference circuit that is shorted to the MAF sensor signal circuit
can cause a DTC P0113 to set. This condition causes a rapid fluctuation in the IAT Sensor parameter.
* An IAT sensor signal circuit that is shorted to the MAF sensor ignition circuit can cause a DTC P0113 to set.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
Circuit/System Description
The intake air temperature (IAT) sensor, a part of the mass air flow (MAF) sensor assembly, is a variable resistor. The IAT sensor has a signal
circuit and a low reference circuit. The IAT sensor measures the temperature of the air entering the engine. The engine control module (ECM)
supplies 5 V to the IAT signal circuit, and a ground for the IAT low reference circuit.
Conditions for Running the DTC
P0112
* DTCs P0116, P0117, P0118, P0125, P0128, P0722, P0723 are not set.
* The engine is running for greater than 10 s.
* The engine coolant temperature (ECT) is colder than 150掳C (302掳F).
* This DTC runs continuously when the above conditions are met.
P0113
* DTCs P0101, P0102, P0103, P0116, P0117, P0118, P0125, P0128, P0722, P0723 are not set.
* The engine is running for greater than 10 s.
* The ECT is warmer than -40掳C (-40掳F).
* The MAF Sensor signal is equal to or greater than 512 g/s.
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0112
The ECM detects that the IAT sensor signal is warmer than 149掳C (300掳F) for greater than 5 s.
P0113
The ECM detects that the IAT sensor signal is colder than -39掳C (-38掳F) for greater than 5 s.
Action Taken When the DTC Sets
DTCs P0112 and P0113 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0112 and P0113 are Type B DTCs.
Diagnostic Aids
* With the ignition ON, the engine OFF, if the engine is cold, a properly functioning IAT sensor will gradually increase the scan tool IAT
Sensor parameter. This is due to the heat that is generated by the mass air flow (MAF) sensor heating elements.
* Depending on the ambient temperature, an IAT sensor signal circuit or low reference circuit that is shorted to the MAF sensor signal circuit
can cause a DTC P0113 to set. This condition causes a rapid fluctuation in the IAT Sensor parameter.
* An IAT sensor signal circuit that is shorted to the MAF sensor ignition circuit can cause a DTC P0113 to set.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
2010 Cadillac CTS Sedan AWD V6-3.0L Page 1972
2010 Cadillac CTS Sedan AWD V6-3.0L Page 1972
DTC P2307
- Ignition Coil 3 Control Circuit High Voltage
DTC P2309
- Ignition Coil 4 Control Circuit Low Voltage
DTC P2310
- Ignition Coil 4 Control Circuit High Voltage
DTC P2312
- Ignition Coil 5 Control Circuit Low Voltage
DTC P2313
- Ignition Coil 5 Control Circuit High Voltage
DTC P2315
- Ignition Coil 6 Control Circuit Low Voltage
DTC P2316
- Ignition Coil 6 Control Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The ignition system on this engine uses individual ignition coils and ignition control (IC) circuits for each cylinder. Ignition voltage is supplied to
each bank of ignition coils. The engine control module (ECM) controls the ignition system operation. The ECM controls each coil using the IC
circuits. The ECM commands the IC circuit low when a spark event is requested.
The sequencing and timing are ECM controlled.
Conditions for Running the DTC
* The engine is operating.
* The ignition voltage is between 10-18 volts.
* The engine speed is less than 6,000 RPM.
* The DTCs run continuously once per crankshaft revolution after the above conditions are met.
Conditions for Setting the DTC
P0351-P0356
The ECM detects the ignition control circuit is open for greater than 4 seconds or a cumulative of 30 seconds.
P2300, P2303, P2306, P2309, P2312, or P2315
The ECM detects the ignition control circuit is shorted to ground for greater than 4 seconds or a cumulative of 30 seconds.
P2301, P2304, P2307, P2310, P2313, or P2316
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1760
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1760
1. Ignition OFF, disconnect the harness connector at the MAF/IAT sensor.
2. Ignition OFF, all vehicles systems OFF, this may take up to for 2 min, test for less than 5 ohm between the IAT low reference circuit terminal
A and ground.
瀚慖f greater than the specified range, test the IAT low reference circuit for an open/high resistance. If the circuit tests normal, replace the
ECM.
3. Ignition ON, verify the scan tool IAT parameter is colder than -39掳C (-38掳F).
瀚慖f warmer than the specified range, test the IAT signal circuit terminal B for a short to ground. If the circuit tests normal, replace the
ECM.
4. Install a 3 A fused jumper wire between the IAT signal circuit terminal B and ground. Verify the scan tool IAT parameter is warmer than 149
掳C (300掳F).
瀚慖f colder than the specified range, test the IAT signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,
replace the ECM.
5. If all circuits test normal, test or replace the MAF/IAT sensor.
Component Testing
Measure and record the resistance of the IAT sensor at various ambient temperatures, and then compare those measurements to the Temperature
Versus Resistance (See: Powertrain Management/Computers and Control Systems/Specifications/Temperature Versus Resistance) table.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Air
Flow Meter/Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, programming, and setup
P0113
DTC P0112 or P0113
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0112
- Intake Air Temperature (IAT) Sensor Circuit Low Voltage
DTC P0113
- Intake Air Temperature (IAT) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
1. Ignition OFF, disconnect the harness connector at the MAF/IAT sensor.
2. Ignition OFF, all vehicles systems OFF, this may take up to for 2 min, test for less than 5 ohm between the IAT low reference circuit terminal
A and ground.
瀚慖f greater than the specified range, test the IAT low reference circuit for an open/high resistance. If the circuit tests normal, replace the
ECM.
3. Ignition ON, verify the scan tool IAT parameter is colder than -39掳C (-38掳F).
瀚慖f warmer than the specified range, test the IAT signal circuit terminal B for a short to ground. If the circuit tests normal, replace the
ECM.
4. Install a 3 A fused jumper wire between the IAT signal circuit terminal B and ground. Verify the scan tool IAT parameter is warmer than 149
掳C (300掳F).
瀚慖f colder than the specified range, test the IAT signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,
replace the ECM.
5. If all circuits test normal, test or replace the MAF/IAT sensor.
Component Testing
Measure and record the resistance of the IAT sensor at various ambient temperatures, and then compare those measurements to the Temperature
Versus Resistance (See: Powertrain Management/Computers and Control Systems/Specifications/Temperature Versus Resistance) table.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Air
Flow Meter/Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, programming, and setup
P0113
DTC P0112 or P0113
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0112
- Intake Air Temperature (IAT) Sensor Circuit Low Voltage
DTC P0113
- Intake Air Temperature (IAT) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
2010 Cadillac Truck SRX AWD V6-3.0L Page 1008
2010 Cadillac Truck SRX AWD V6-3.0L Page 1008
Low voltage or a momentary loss of power or ground to the ECM may cause a DTC to set. Verify for the following:
* The battery cables are clean and tight, and the battery is fully charged-Refer to Battery Inspection/Test (See: Starting and Charging/Testing
and Inspection/Component Tests and General Diagnostics/Battery Inspection/Test).
* The ECM ground circuits do not have an open or high resistance
* The ECM power circuits do not have an open, short to ground, or high resistance
Reference Information
Schematic Reference
Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics
(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Observe the DTC information with a scan tool. DTC P0601, P0602, P0603, P0604, P0606, P062B, P062F, P0630, P16F3, or P2610 should
not set.
2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the
conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Ignition ON, clear the DTC information with a scan tool.
2. Observe the scan tool DTC information. Verify that DTC P0602 or P0630 does not set.
瀚慖f DTC P0602 or P0630 failed this ignition, reprogram the K20 ECM. Refer to Control Module References (See: Testing and
Inspection/Programming and Relearning). If the DTC resets, replace the K20 ECM.
3. Observe the DTC information with a scan tool. Verify that DTC P0601, P0603, P0604, P0606, P062B, P062F, P16F3, or P2610 does not set.
瀚慖f a DTC failed this ignition, replace the K20 ECM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and
programming
P0017
DTC P0016, P0017, P0018, or P0019 (LF1, LFW)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1759
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1759
* This DTC runs continuously when the above conditions are met.
P0113
* DTCs P0101, P0102, P0103, P0116, P0117, P0118, P0125, P0128, P0722, P0723 are not set.
* The engine is running for greater than 10 s.
* The ECT is warmer than -40掳C (-40掳F).
* The MAF Sensor signal is equal to or greater than 512 g/s.
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0112
The ECM detects that the IAT sensor signal is warmer than 149掳C (300掳F) for greater than 5 s.
P0113
The ECM detects that the IAT sensor signal is colder than -39掳C (-38掳F) for greater than 5 s.
Action Taken When the DTC Sets
DTCs P0112 and P0113 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0112 and P0113 are Type B DTCs.
Diagnostic Aids
* With the ignition ON, the engine OFF, if the engine is cold, a properly functioning IAT sensor will gradually increase the scan tool IAT
Sensor parameter. This is due to the heat that is generated by the mass air flow (MAF) sensor heating elements.
* Depending on the ambient temperature, an IAT sensor signal circuit or low reference circuit that is shorted to the MAF sensor signal circuit
can cause a DTC P0113 to set. This condition causes a rapid fluctuation in the IAT Sensor parameter.
* An IAT sensor signal circuit that is shorted to the MAF sensor ignition circuit can cause a DTC P0113 to set.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Engine idling, observe the scan tool IAT Sensor parameter. The reading should be between -38 to +149掳C (-36 to +300F) depending on the
current ambient temperature and the vehicle operating conditions.
2. Operate the vehicle within the Conditions for Running the DTC to verify that the DTC does not reset. You may also operate the vehicle
within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
* This DTC runs continuously when the above conditions are met.
P0113
* DTCs P0101, P0102, P0103, P0116, P0117, P0118, P0125, P0128, P0722, P0723 are not set.
* The engine is running for greater than 10 s.
* The ECT is warmer than -40掳C (-40掳F).
* The MAF Sensor signal is equal to or greater than 512 g/s.
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0112
The ECM detects that the IAT sensor signal is warmer than 149掳C (300掳F) for greater than 5 s.
P0113
The ECM detects that the IAT sensor signal is colder than -39掳C (-38掳F) for greater than 5 s.
Action Taken When the DTC Sets
DTCs P0112 and P0113 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0112 and P0113 are Type B DTCs.
Diagnostic Aids
* With the ignition ON, the engine OFF, if the engine is cold, a properly functioning IAT sensor will gradually increase the scan tool IAT
Sensor parameter. This is due to the heat that is generated by the mass air flow (MAF) sensor heating elements.
* Depending on the ambient temperature, an IAT sensor signal circuit or low reference circuit that is shorted to the MAF sensor signal circuit
can cause a DTC P0113 to set. This condition causes a rapid fluctuation in the IAT Sensor parameter.
* An IAT sensor signal circuit that is shorted to the MAF sensor ignition circuit can cause a DTC P0113 to set.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Engine idling, observe the scan tool IAT Sensor parameter. The reading should be between -38 to +149掳C (-36 to +300F) depending on the
current ambient temperature and the vehicle operating conditions.
2. Operate the vehicle within the Conditions for Running the DTC to verify that the DTC does not reset. You may also operate the vehicle
within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1758
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1758
3. Install a jumper wire between the low reference circuit of the MAP sensor and ground.
4. Install a jumper wire at the MAP sensor signal circuit.
5. Connect a DMM between the jumper wire from the MAP sensor signal circuit and ground.
6. Install the J-35555 to the MAP sensor vacuum port. Slowly apply vacuum to the sensor while observing the voltage on the DMM. The
voltage should vary between 0-5.2 volts without any spikes or dropouts.
瀚慖f the voltage is not within the specified range or is erratic, replace the MAP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Manifold Absolute Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Manifold
Pressure/Vacuum Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0112
DTC P0112 or P0113
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0112
- Intake Air Temperature (IAT) Sensor Circuit Low Voltage
DTC P0113
- Intake Air Temperature (IAT) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The intake air temperature (IAT) sensor, a part of the mass air flow (MAF) sensor assembly, is a variable resistor. The IAT sensor has a signal
circuit and a low reference circuit. The IAT sensor measures the temperature of the air entering the engine. The engine control module (ECM)
supplies 5 V to the IAT signal circuit, and a ground for the IAT low reference circuit.
Conditions for Running the DTC
P0112
* DTCs P0116, P0117, P0118, P0125, P0128, P0722, P0723 are not set.
* The engine is running for greater than 10 s.
* The engine coolant temperature (ECT) is colder than 150掳C (302掳F).
3. Install a jumper wire between the low reference circuit of the MAP sensor and ground.
4. Install a jumper wire at the MAP sensor signal circuit.
5. Connect a DMM between the jumper wire from the MAP sensor signal circuit and ground.
6. Install the J-35555 to the MAP sensor vacuum port. Slowly apply vacuum to the sensor while observing the voltage on the DMM. The
voltage should vary between 0-5.2 volts without any spikes or dropouts.
瀚慖f the voltage is not within the specified range or is erratic, replace the MAP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Manifold Absolute Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Manifold
Pressure/Vacuum Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0112
DTC P0112 or P0113
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0112
- Intake Air Temperature (IAT) Sensor Circuit Low Voltage
DTC P0113
- Intake Air Temperature (IAT) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The intake air temperature (IAT) sensor, a part of the mass air flow (MAF) sensor assembly, is a variable resistor. The IAT sensor has a signal
circuit and a low reference circuit. The IAT sensor measures the temperature of the air entering the engine. The engine control module (ECM)
supplies 5 V to the IAT signal circuit, and a ground for the IAT low reference circuit.
Conditions for Running the DTC
P0112
* DTCs P0116, P0117, P0118, P0125, P0128, P0722, P0723 are not set.
* The engine is running for greater than 10 s.
* The engine coolant temperature (ECT) is colder than 150掳C (302掳F).
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1757
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1757
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Special Tools
* J-35555 Metal Mityvac
* J-23738-A Mityvac
Circuit/System Verification
* Use the scan tool and compare the MAP Sensor parameter to a known good vehicle, under various operating conditions.
* Use the scan tool and compare the MAP Sensor parameter at ignition ON, with the engine OFF, to the Altitude vs Barometric Pressure table.
Refer to Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and Control Systems/Specifications/Altitude
Versus Barometric Pressure).
Circuit/System Testing
Important: All electrical components and accessories must be turned OFF and allowed to power down.
1. Ignition OFF, disconnect the MAP harness connector at the MAP sensor.
2. Ignition OFF, test for less than 5 ohms between the low reference circuit and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the ECM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
4. Verify the scan tool MAP Sensor parameter is less than 12 kPa.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
5. Install a 3A fused jumper wire between the signal circuit and the 5-volt reference circuit. Verify the scan tool MAP Sensor parameter is
greater than 103 kPa.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the ECM.
6. If all circuits test normal, test or replace the MAP sensor.
Component Testing
Important: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding
with the Component Testing.
1. Turn ON the ignition, with the engine OFF, and remove the MAP sensor.
2. Install a 3A fused jumper wire between the 5-volt reference circuit and the corresponding terminal of the MAP sensor.
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Special Tools
* J-35555 Metal Mityvac
* J-23738-A Mityvac
Circuit/System Verification
* Use the scan tool and compare the MAP Sensor parameter to a known good vehicle, under various operating conditions.
* Use the scan tool and compare the MAP Sensor parameter at ignition ON, with the engine OFF, to the Altitude vs Barometric Pressure table.
Refer to Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and Control Systems/Specifications/Altitude
Versus Barometric Pressure).
Circuit/System Testing
Important: All electrical components and accessories must be turned OFF and allowed to power down.
1. Ignition OFF, disconnect the MAP harness connector at the MAP sensor.
2. Ignition OFF, test for less than 5 ohms between the low reference circuit and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the ECM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
4. Verify the scan tool MAP Sensor parameter is less than 12 kPa.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
5. Install a 3A fused jumper wire between the signal circuit and the 5-volt reference circuit. Verify the scan tool MAP Sensor parameter is
greater than 103 kPa.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the ECM.
6. If all circuits test normal, test or replace the MAP sensor.
Component Testing
Important: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding
with the Component Testing.
1. Turn ON the ignition, with the engine OFF, and remove the MAP sensor.
2. Install a 3A fused jumper wire between the 5-volt reference circuit and the corresponding terminal of the MAP sensor.
2010 Cadillac CTS Sedan AWD V6-3.0L Page 1649
2010 Cadillac CTS Sedan AWD V6-3.0L Page 1649
1. Perform the Line Pressure Check (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component
Tests and General Diagnostics/Line Pressure Check). Verify the transmission line pressures are within the specified ranges.
瀚慖f not within the specified ranges, refer to Fluid Pressure High or Low (See: Transmission and Drivetrain/Automatic
Transmission/Transaxle/Testing and Inspection/Symptom Related Diagnostic Procedures/Fluid Pressure High or Low).
2. Ignition OFF, remove the control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly
Replacement (See: Powertrain Management/Transmission Control Systems/Actuators and Solenoids - Transmission and
Drivetrain/Actuators and Solenoids - A/T/Shift Solenoid/Service and Repair).
3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test (See: Transmission and
Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/Control Solenoid Valve and
Transmission Control Module Assembly Solenoid Performance Test). Test all solenoids on the Q8 control solenoid valve assembly. A
pressure change should occur for each solenoid valve.
瀚慖f the Q8 control solenoid valve assembly does not pass the performance test, replace the Q8 control solenoid valve assembly.
4. Listed in the chart below, are conditions for each component that could set DTC P0776 or P0777. Carefully inspect each component for that
condition. Repair or replace as necessary.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Control solenoid valve assembly replacement. Refer to Control Module References (See: Testing and Inspection/Programming and
Relearning) for replacement, setup, and programming.
* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and
Inspection/Programming and Relearning/Service Fast Learn Adapts) following all transmission related repairs.
P0796
DTC P0796 or P0797
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1756
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1756
Circuit Description
The manifold absolute pressure (MAP) sensor measures the pressure inside the intake manifold. Pressure in the intake manifold is affected by
engine speed, throttle opening, air temperature, and barometric pressure (BARO). A diaphragm within the MAP sensor is displaced by the pressure
changes that occur from the varying load and operating conditions of the engine. The sensor translates this action into electrical resistance. The
MAP sensor wiring includes 3 circuits. The engine control module (ECM) supplies a regulated 5 volts to the sensor on a 5-volt reference circuit.
The ECM supplies a ground on a low reference circuit. The MAP sensor provides a signal voltage to the ECM, relative to the pressure changes, on
the MAP sensor signal circuit. The ECM converts the signal voltage input to a pressure value.
Under normal operation the highest pressure that can exist in the intake manifold is equal to BARO. This occurs when the vehicle is operated at
wide-open throttle (WOT) or when the ignition is ON while the engine is OFF. Under these conditions, the ECM uses the MAP sensor to determine
the current BARO. The lowest manifold pressures occur when the vehicle is idling or decelerating. MAP can range from 10 kPa, when pressures
are low, to as much as 104 kPa when pressures are high, depending on the BARO. The ECM monitors the MAP sensor signal for pressure outside
of the normal range.
Conditions for Running the DTC
P0107
* DTCs P0641, P0651, P1516, P2101, P2125, P2135, P2138, P2176 are not set.
* The engine speed is greater than 400 RPM.
* The throttle angle is greater than 0 percent when the engine speed is less than 800 RPM.
OR
* The throttle angle is greater than 13 percent when the engine speed is greater than 800 RPM.
* This DTC runs continuously when the above conditions are met.
P0108
* DTCs P1516, P2101, P2125, P2135, P2138, P2176 are not set.
* The engine has been running for a period of time that is determined by the start-up engine coolant temperature (ECT). The time ranges from
8 seconds at less than -30掳C (-22掳F) to 3 seconds at greater than 30掳C (86掳F).
* The throttle angle is less than 1 percent when the engine speed is less than 1,200 RPM.
OR
* The throttle angle is less than 20 percent when the engine speed is greater than 1,200 RPM.
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0107
The ECM detects that the MAP sensor voltage is less than 0.1 volt for more than 4 seconds.
P0108
The ECM detects that the MAP sensor voltage is more than 4.9 volts for greater than 4 seconds.
Action Taken When the DTC Sets
DTCs P0107 and P0108 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0107 and P0108 are Type B DTCs.
Diagnostic Aids
Verify the integrity of the MAP sensor system by inspecting for the following conditions:
* Intake manifold vacuum leaks
* Any damage to the MAP sensor housing
* Any damage to the MAP sensor seal
* A loose or improperly installed MAP sensor
* A restriction in the vacuum source of the MAP sensor
Circuit Description
The manifold absolute pressure (MAP) sensor measures the pressure inside the intake manifold. Pressure in the intake manifold is affected by
engine speed, throttle opening, air temperature, and barometric pressure (BARO). A diaphragm within the MAP sensor is displaced by the pressure
changes that occur from the varying load and operating conditions of the engine. The sensor translates this action into electrical resistance. The
MAP sensor wiring includes 3 circuits. The engine control module (ECM) supplies a regulated 5 volts to the sensor on a 5-volt reference circuit.
The ECM supplies a ground on a low reference circuit. The MAP sensor provides a signal voltage to the ECM, relative to the pressure changes, on
the MAP sensor signal circuit. The ECM converts the signal voltage input to a pressure value.
Under normal operation the highest pressure that can exist in the intake manifold is equal to BARO. This occurs when the vehicle is operated at
wide-open throttle (WOT) or when the ignition is ON while the engine is OFF. Under these conditions, the ECM uses the MAP sensor to determine
the current BARO. The lowest manifold pressures occur when the vehicle is idling or decelerating. MAP can range from 10 kPa, when pressures
are low, to as much as 104 kPa when pressures are high, depending on the BARO. The ECM monitors the MAP sensor signal for pressure outside
of the normal range.
Conditions for Running the DTC
P0107
* DTCs P0641, P0651, P1516, P2101, P2125, P2135, P2138, P2176 are not set.
* The engine speed is greater than 400 RPM.
* The throttle angle is greater than 0 percent when the engine speed is less than 800 RPM.
OR
* The throttle angle is greater than 13 percent when the engine speed is greater than 800 RPM.
* This DTC runs continuously when the above conditions are met.
P0108
* DTCs P1516, P2101, P2125, P2135, P2138, P2176 are not set.
* The engine has been running for a period of time that is determined by the start-up engine coolant temperature (ECT). The time ranges from
8 seconds at less than -30掳C (-22掳F) to 3 seconds at greater than 30掳C (86掳F).
* The throttle angle is less than 1 percent when the engine speed is less than 1,200 RPM.
OR
* The throttle angle is less than 20 percent when the engine speed is greater than 1,200 RPM.
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0107
The ECM detects that the MAP sensor voltage is less than 0.1 volt for more than 4 seconds.
P0108
The ECM detects that the MAP sensor voltage is more than 4.9 volts for greater than 4 seconds.
Action Taken When the DTC Sets
DTCs P0107 and P0108 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0107 and P0108 are Type B DTCs.
Diagnostic Aids
Verify the integrity of the MAP sensor system by inspecting for the following conditions:
* Intake manifold vacuum leaks
* Any damage to the MAP sensor housing
* Any damage to the MAP sensor seal
* A loose or improperly installed MAP sensor
* A restriction in the vacuum source of the MAP sensor
2010 Cadillac Truck SRX AWD V6-3.0L Page 1143
2010 Cadillac Truck SRX AWD V6-3.0L Page 1143
DTC or a driveability condition. Refer to Temperature Versus Resistance - Engine Coolant Temperature Sensor (See: Powertrain
Management/Computers and Control Systems/Specifications/Temperature Versus Resistance - Engine Coolant Temperature Sensor).
* If the vehicle has sat overnight, the IAT sensor and the ECT sensor values should display within 3掳C (5掳F).
* After starting a cold engine, the ECT sensor temperature should rise steadily, then stabilize after the thermostat opens.
* High resistance in the circuits of either the ECT or IAT sensor could set a DTC.
* DTC's must be cleared before Engine Cooling Fan's are Commanded Off.
Reference Information
Schematic Reference
Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics
(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Engine idling for 1 min. Observe the DTC information with a scan tool. DTCs P0117 and P0118 should not set.
2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the
conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.
Caution: Do NOT use a test lamp to test the continuity of the circuit. Damage to the control module may occur due to excessive current
draw.
Note: The control module or the sensor may be damaged if the circuit is shorted to battery positive voltage.
2. Ignition Off all vehicle systems Off, this may take up to 2 minutes.Test for less than 5 ohm between the low reference circuit terminal A and
ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance, or for a short to voltage. If the circuit tests
normal, replace the K20 ECM.
3. Ignition ON, verify that the scan tool ECT sensor parameter is at -40掳C (-40掳F).
瀚慖f greater than the specified value, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the K20 ECM.
Note: If the fuse in the jumper wire opens, the signal circuit is shorted to a voltage and the sensor may be damaged.
4. Ignition ON, install a 3 A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the ECT
sensor parameter is greater than 142掳C (288掳F).
瀚慖f less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace
the K20 ECM.
5. If all circuits test normal, test or replace the B34 ECT sensor.
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1755
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1755
5. Install a 3A fused jumper wire between the signal circuit and the 5-volt reference circuit. Verify the scan tool MAP Sensor parameter is
greater than 103 kPa.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the ECM.
6. If all circuits test normal, test or replace the MAP sensor.
Component Testing
Important: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding
with the Component Testing.
1. Turn ON the ignition, with the engine OFF, and remove the MAP sensor.
2. Install a 3A fused jumper wire between the 5-volt reference circuit and the corresponding terminal of the MAP sensor.
3. Install a jumper wire between the low reference circuit of the MAP sensor and ground.
4. Install a jumper wire at the MAP sensor signal circuit.
5. Connect a DMM between the jumper wire from the MAP sensor signal circuit and ground.
6. Install the J-35555 to the MAP sensor vacuum port. Slowly apply vacuum to the sensor while observing the voltage on the DMM. The
voltage should vary between 0-5.2 volts without any spikes or dropouts.
瀚慖f the voltage is not within the specified range or is erratic, replace the MAP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Manifold Absolute Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Manifold
Pressure/Vacuum Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0108
DTC P0107 or P0108
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0107
- Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
DTC P0108
- Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
5. Install a 3A fused jumper wire between the signal circuit and the 5-volt reference circuit. Verify the scan tool MAP Sensor parameter is
greater than 103 kPa.
瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the ECM.
6. If all circuits test normal, test or replace the MAP sensor.
Component Testing
Important: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding
with the Component Testing.
1. Turn ON the ignition, with the engine OFF, and remove the MAP sensor.
2. Install a 3A fused jumper wire between the 5-volt reference circuit and the corresponding terminal of the MAP sensor.
3. Install a jumper wire between the low reference circuit of the MAP sensor and ground.
4. Install a jumper wire at the MAP sensor signal circuit.
5. Connect a DMM between the jumper wire from the MAP sensor signal circuit and ground.
6. Install the J-35555 to the MAP sensor vacuum port. Slowly apply vacuum to the sensor while observing the voltage on the DMM. The
voltage should vary between 0-5.2 volts without any spikes or dropouts.
瀚慖f the voltage is not within the specified range or is erratic, replace the MAP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Manifold Absolute Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Manifold
Pressure/Vacuum Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0108
DTC P0107 or P0108
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0107
- Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
DTC P0108
- Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1754
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1754
Conditions for Clearing the MIL/DTC
DTCs P0107 and P0108 are Type B DTCs.
Diagnostic Aids
Verify the integrity of the MAP sensor system by inspecting for the following conditions:
* Intake manifold vacuum leaks
* Any damage to the MAP sensor housing
* Any damage to the MAP sensor seal
* A loose or improperly installed MAP sensor
* A restriction in the vacuum source of the MAP sensor
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Special Tools
* J-35555 Metal Mityvac
* J-23738-A Mityvac
Circuit/System Verification
* Use the scan tool and compare the MAP Sensor parameter to a known good vehicle, under various operating conditions.
* Use the scan tool and compare the MAP Sensor parameter at ignition ON, with the engine OFF, to the Altitude vs Barometric Pressure table.
Refer to Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and Control Systems/Specifications/Altitude
Versus Barometric Pressure).
Circuit/System Testing
Important: All electrical components and accessories must be turned OFF and allowed to power down.
1. Ignition OFF, disconnect the MAP harness connector at the MAP sensor.
2. Ignition OFF, test for less than 5 ohms between the low reference circuit and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the ECM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
4. Verify the scan tool MAP Sensor parameter is less than 12 kPa.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
Conditions for Clearing the MIL/DTC
DTCs P0107 and P0108 are Type B DTCs.
Diagnostic Aids
Verify the integrity of the MAP sensor system by inspecting for the following conditions:
* Intake manifold vacuum leaks
* Any damage to the MAP sensor housing
* Any damage to the MAP sensor seal
* A loose or improperly installed MAP sensor
* A restriction in the vacuum source of the MAP sensor
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Special Tools
* J-35555 Metal Mityvac
* J-23738-A Mityvac
Circuit/System Verification
* Use the scan tool and compare the MAP Sensor parameter to a known good vehicle, under various operating conditions.
* Use the scan tool and compare the MAP Sensor parameter at ignition ON, with the engine OFF, to the Altitude vs Barometric Pressure table.
Refer to Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and Control Systems/Specifications/Altitude
Versus Barometric Pressure).
Circuit/System Testing
Important: All electrical components and accessories must be turned OFF and allowed to power down.
1. Ignition OFF, disconnect the MAP harness connector at the MAP sensor.
2. Ignition OFF, test for less than 5 ohms between the low reference circuit and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit and ground.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the ECM.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
4. Verify the scan tool MAP Sensor parameter is less than 12 kPa.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1753
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1753
Diagnostic Fault Information
Typical Scan Tool Data
Circuit Description
The manifold absolute pressure (MAP) sensor measures the pressure inside the intake manifold. Pressure in the intake manifold is affected by
engine speed, throttle opening, air temperature, and barometric pressure (BARO). A diaphragm within the MAP sensor is displaced by the pressure
changes that occur from the varying load and operating conditions of the engine. The sensor translates this action into electrical resistance. The
MAP sensor wiring includes 3 circuits. The engine control module (ECM) supplies a regulated 5 volts to the sensor on a 5-volt reference circuit.
The ECM supplies a ground on a low reference circuit. The MAP sensor provides a signal voltage to the ECM, relative to the pressure changes, on
the MAP sensor signal circuit. The ECM converts the signal voltage input to a pressure value.
Under normal operation the highest pressure that can exist in the intake manifold is equal to BARO. This occurs when the vehicle is operated at
wide-open throttle (WOT) or when the ignition is ON while the engine is OFF. Under these conditions, the ECM uses the MAP sensor to determine
the current BARO. The lowest manifold pressures occur when the vehicle is idling or decelerating. MAP can range from 10 kPa, when pressures
are low, to as much as 104 kPa when pressures are high, depending on the BARO. The ECM monitors the MAP sensor signal for pressure outside
of the normal range.
Conditions for Running the DTC
P0107
* DTCs P0641, P0651, P1516, P2101, P2125, P2135, P2138, P2176 are not set.
* The engine speed is greater than 400 RPM.
* The throttle angle is greater than 0 percent when the engine speed is less than 800 RPM.
OR
* The throttle angle is greater than 13 percent when the engine speed is greater than 800 RPM.
* This DTC runs continuously when the above conditions are met.
P0108
* DTCs P1516, P2101, P2125, P2135, P2138, P2176 are not set.
* The engine has been running for a period of time that is determined by the start-up engine coolant temperature (ECT). The time ranges from
8 seconds at less than -30掳C (-22掳F) to 3 seconds at greater than 30掳C (86掳F).
* The throttle angle is less than 1 percent when the engine speed is less than 1,200 RPM.
OR
* The throttle angle is less than 20 percent when the engine speed is greater than 1,200 RPM.
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0107
The ECM detects that the MAP sensor voltage is less than 0.1 volt for more than 4 seconds.
P0108
The ECM detects that the MAP sensor voltage is more than 4.9 volts for greater than 4 seconds.
Action Taken When the DTC Sets
DTCs P0107 and P0108 are Type B DTCs.
Diagnostic Fault Information
Typical Scan Tool Data
Circuit Description
The manifold absolute pressure (MAP) sensor measures the pressure inside the intake manifold. Pressure in the intake manifold is affected by
engine speed, throttle opening, air temperature, and barometric pressure (BARO). A diaphragm within the MAP sensor is displaced by the pressure
changes that occur from the varying load and operating conditions of the engine. The sensor translates this action into electrical resistance. The
MAP sensor wiring includes 3 circuits. The engine control module (ECM) supplies a regulated 5 volts to the sensor on a 5-volt reference circuit.
The ECM supplies a ground on a low reference circuit. The MAP sensor provides a signal voltage to the ECM, relative to the pressure changes, on
the MAP sensor signal circuit. The ECM converts the signal voltage input to a pressure value.
Under normal operation the highest pressure that can exist in the intake manifold is equal to BARO. This occurs when the vehicle is operated at
wide-open throttle (WOT) or when the ignition is ON while the engine is OFF. Under these conditions, the ECM uses the MAP sensor to determine
the current BARO. The lowest manifold pressures occur when the vehicle is idling or decelerating. MAP can range from 10 kPa, when pressures
are low, to as much as 104 kPa when pressures are high, depending on the BARO. The ECM monitors the MAP sensor signal for pressure outside
of the normal range.
Conditions for Running the DTC
P0107
* DTCs P0641, P0651, P1516, P2101, P2125, P2135, P2138, P2176 are not set.
* The engine speed is greater than 400 RPM.
* The throttle angle is greater than 0 percent when the engine speed is less than 800 RPM.
OR
* The throttle angle is greater than 13 percent when the engine speed is greater than 800 RPM.
* This DTC runs continuously when the above conditions are met.
P0108
* DTCs P1516, P2101, P2125, P2135, P2138, P2176 are not set.
* The engine has been running for a period of time that is determined by the start-up engine coolant temperature (ECT). The time ranges from
8 seconds at less than -30掳C (-22掳F) to 3 seconds at greater than 30掳C (86掳F).
* The throttle angle is less than 1 percent when the engine speed is less than 1,200 RPM.
OR
* The throttle angle is less than 20 percent when the engine speed is greater than 1,200 RPM.
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0107
The ECM detects that the MAP sensor voltage is less than 0.1 volt for more than 4 seconds.
P0108
The ECM detects that the MAP sensor voltage is more than 4.9 volts for greater than 4 seconds.
Action Taken When the DTC Sets
DTCs P0107 and P0108 are Type B DTCs.
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1752
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1752
瀚慖f less than the specified range, test the signal circuit terminal B for a short to ground or an open/high resistance. If the circuit tests
normal, replace the ECM.
9. If all circuits test normal, test or replace the MAP sensor.
Component Testing
Note: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding with the
Component Testing.
Skewed Sensor Test
1. Using the following steps and referencing the table below will determine if the MAP sensor is skewed.
2. Ignition ON, engine OFF, observe the MAP sensor scan tool parameter.
3. Use the observed MAP Sensor Scan Tool parameter that is closest to a value that is indicated in the first column.
4. Using the J-23738-A or the J-35555 to apply 5 in Hg of vacuum to the MAP sensor, the parameter in the first column should decrease by 17
kPa. The acceptable range is indicated in the second column.
5. Using the J-23738-A or the J-35555 to apply 10 in Hg of vacuum to the MAP sensor, the parameter in the first column should decrease by 34
kPa. The acceptable range is indicated in the third column.
Erratic Signal Test
1. Ignition OFF, remove the MAP sensor.
2. Install a 3 A fused jumper wire between the 5 V reference circuit terminal C and the corresponding terminal of the MAP sensor.
3. Install a jumper wire between the low reference terminal A of the MAP sensor and ground.
4. Install a jumper wire at terminal B of the MAP sensor.
5. Connect a DMM between the jumper wire from the terminal B of the MAP sensor and ground.
6. Ignition ON, with the J-23738-A or J-35555, slowly apply vacuum to the sensor while observing the voltage on the DMM. The voltage
should vary between 4.9-0.2 V without any spikes or dropouts.
瀚慖f the voltage is erratic, replace the MAP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Manifold Absolute Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Manifold
Pressure/Vacuum Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming.
P0107
DTC P0107 or P0108
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0107
- Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
DTC P0108
- Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
瀚慖f less than the specified range, test the signal circuit terminal B for a short to ground or an open/high resistance. If the circuit tests
normal, replace the ECM.
9. If all circuits test normal, test or replace the MAP sensor.
Component Testing
Note: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding with the
Component Testing.
Skewed Sensor Test
1. Using the following steps and referencing the table below will determine if the MAP sensor is skewed.
2. Ignition ON, engine OFF, observe the MAP sensor scan tool parameter.
3. Use the observed MAP Sensor Scan Tool parameter that is closest to a value that is indicated in the first column.
4. Using the J-23738-A or the J-35555 to apply 5 in Hg of vacuum to the MAP sensor, the parameter in the first column should decrease by 17
kPa. The acceptable range is indicated in the second column.
5. Using the J-23738-A or the J-35555 to apply 10 in Hg of vacuum to the MAP sensor, the parameter in the first column should decrease by 34
kPa. The acceptable range is indicated in the third column.
Erratic Signal Test
1. Ignition OFF, remove the MAP sensor.
2. Install a 3 A fused jumper wire between the 5 V reference circuit terminal C and the corresponding terminal of the MAP sensor.
3. Install a jumper wire between the low reference terminal A of the MAP sensor and ground.
4. Install a jumper wire at terminal B of the MAP sensor.
5. Connect a DMM between the jumper wire from the terminal B of the MAP sensor and ground.
6. Ignition ON, with the J-23738-A or J-35555, slowly apply vacuum to the sensor while observing the voltage on the DMM. The voltage
should vary between 4.9-0.2 V without any spikes or dropouts.
瀚慖f the voltage is erratic, replace the MAP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Manifold Absolute Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Manifold
Pressure/Vacuum Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming.
P0107
DTC P0107 or P0108
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0107
- Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
DTC P0108
- Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
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