2010 Cadillac Truck SRX FWD V6-3.0L Page 1105

2010 Cadillac Truck SRX FWD V6-3.0L Page 1105

Action Taken When the DTC Sets

* DTCs P0090, P0091, P0092, P00C8, P00C9, and P00CA are Type A DTCs.

* A message center or an indicator displays Reduced Engine Power.

Conditions for Clearing the DTC

DTCs P0090, P0091, P0092, P00C8, P00C9, and P00CA are Type A DTCs.

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)

Description and Operation

Fuel System Description (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Fuel System

Description)Fuel System Description (LAU or LY7) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and

Operation/Fuel 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)

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 P0090, P0091, P0092, P00C8, P00C9, P00CA, P0685, or P1682 should not set.

瀚慖f a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble

Code (DTC) List - Vehicle).

2. Ignition ON, command the Fuel Pressure Regulator ON and OFF with a scan tool while observing the following control circuit status

parameters:

* Fuel Pressure Regulator Control Circuit High Voltage Test Status

* Fuel Pressure Regulator Control Circuit Open Test Status

* Fuel Pressure Regulator Control Circuit Low Voltage Test Status

* Fuel Pressure Regulator High Control Circuit High Voltage Test Status

* Fuel Pressure Regulator High Control Circuit Open Test Status

* Fuel Pressure Regulator High Control Circuit Low Voltage Test Status

Each parameter should toggle between OK and Not Run or Not Run and OK.

3. Engine idling, observe the Fuel Rail Pressure Sensor parameter with a scan tool. The pressure should be approximately 1.9-2.1 MPa (279-305

psi).

4. Command an increase and decrease in fuel rail pressure with a scan tool. Observe the scan tool Fuel Rail Pressure Sensor parameter. The

Fuel Rail Pressure Sensor should increase or decrease with each command.

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 G18 high pressure fuel pump.

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2010 Cadillac Truck SRX FWD V6-3.0L Page 1536

Action Taken When the DTC Sets

DTCs P0506 and P0507 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0506 and P0507 are Type B DTCs.

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. Ignition ON, observe the DTC information with a scan tool. Verify there are no other DTCs set.

瀚慖f a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble

Code (DTC) List - Vehicle).

2. Idle the engine at the normal operating temperature. Compare the Desired Idle Speed to the actual Engine Speed with a scan tool. The actual

Engine Speed should not be less than 100 RPM of the Desired Idle Speed or 200 RPM greater than the Desired Idle Speed.

3. Allow the engine to idle within the Conditions for Running the DTC. DTCs P0506 or P0507 should not set.

4. 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

Verify none of the following conditions exist:

P0506

* Excess deposits in the Q38 throttle body. Refer to Throttle Body Inspection and Cleaning (See: Powertrain Management/Fuel Delivery and

Air Induction/Throttle Body/Service and Repair/Procedures).

* Restricted exhaust

* Mechanical conditions that limits engine speed

* Parasitic load on the engine-For example, a transmission condition, a belt driven accessory condition.

瀚慖f a condition is found, repair as necessary.

P0507

* Vacuum leaks

* A throttle valve that does not close correctly

* Verify the correct operation of the crankcase ventilation system. Inspect for the following conditions:

- The routing of the positive crankcase ventilation (PCV) system

- Vacuum leaks in the PCV system-Refer to Crankcase Ventilation System Inspection/Diagnosis (See: Powertrain Management/Emission

Control Systems/Positive Crankcase Ventilation/Testing and Inspection).

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2010 Cadillac Truck SRX FWD V6-3.0L Page 1297

Action Taken When the DTC Sets

* DTC P0218 is a Type C DTC

* Warning message to the driver via CAN bus.

Conditions for Clearing the DTC

* DTC P0218 is a Type C DTC.

* Vehicle speed less than 170 km/h (106 MPH) and transmission fluid temperature less than 140掳C (284掳F) for more than 3 s.

* Vehicle speed more than 170 km/h (106 MPH) and transmission fluid temperature less than 140掳C (284掳F) for more than 3 s.

Diagnostic Aids

Ask the customer whether their typical day-to-day driving include:

* Trailer towing

* Trailer towing should occur in D 4th gear.

* Hauling or vehicle overloading

* Hot climate driving

* Extended idling

* Extreme off-road conditions

* Ensure the engine cooling system is functioning normally.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams/Electrical

Diagrams)

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)

Description and Operation

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/AF40-6 - Automatic Transmission/Transmission Component and System Description)

* Transmission Overheats (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Symptom Related

Diagnostic Procedures/AF40-6 - Automatic Transmission/Transmission Overheats)

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. Verify the transmission fluid level, color and odor is correct.

2. Review the Freeze Frame when the DTC set.

瀚慖f the engine coolant temperature (ECT) was above 125掳C (257掳F) when the DTC set, go to Engine Overheating (See: Engine, Cooling

and Exhaust/Cooling System/Testing and Inspection/Symptom Related Diagnostic Procedures/Engine Overheating) and correct that

concern first.

Circuit/System Testing

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2010 Cadillac Truck SRX FWD V6-3.0L Page 1196

Action Taken When the DTC Sets

DTCs P0134, P0140, P0154, and P0160 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0134, P0140, P0154, and P0160 are Type B DTCs.

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)

* Heated Oxygen Sensor Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical

Diagnostic Procedures/Wiring Repairs/Heated Oxygen Sensor 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 no B52 HO2S heater DTCs are set.

瀚慖f a B52 HO2S heater DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).

2. Engine running, observe the appropriate scan tool B52 HO2S voltage parameter. The reading should be within the range of 50-1,050 mV.

3. 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

Note: All modules must be powered down or misdiagnosis may result.

1. Ignition OFF, disconnect the appropriate B52 HO2S harness connector.

2. Ignition ON, observe the appropriate scan tool HO2S voltage parameter. The parameter should display 1.27 V.

瀚慖f less than the specified range, test the high and low signal circuits for a short to ground. If both signal circuits test normal, replace the

K20 ECM.

3. Ignition ON, test for 2.5-3.0 V between the high signal circuit terminal B and ground.

瀚慖f less than the specified range, test the high signal circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.

瀚慖f greater than the specified range, test the high signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

4. Ignition OFF, connect a 3 A fused jumper wire between the high signal circuit terminal B and the low signal circuit terminal A.

Note: The low signal circuit is tied to a pull-up circuit within the ECM. A voltage of 0.90-1.10 V on the low signal circuit is normal.

5. Ignition ON, verify the scan tool HO2S parameter displays 0.0 V.

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2010 Cadillac Truck SRX FWD V6-3.0L Page 2004

Action Taken When the DTC Sets

DTCs P2178 and P2188 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P2178 and P2188 are Type B DTCs.

Diagnostic Aids

* A fuel system delivery condition causes this DTC to set. Thoroughly inspect all items that cause a rich condition. Refer to Fuel System

Diagnosis (LF1 China) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel System

Diagnosis (China))Fuel System Diagnosis (LF1 Except China) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Pump/Testing and Inspection/Fuel System Diagnosis (Except China))Fuel System Diagnosis (LAU China) (See: Powertrain

Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (China))Fuel System Diagnosis

(LAU Except China) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel System

Diagnosis (Except China)).

* Review the Freeze Frame/Failure Records with a scan tool.

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 P2178 or P2188 should not be set.

瀚慖f there are other DTCs set besides DTC P2178 or P2188, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic

Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) to diagnosis the applicable DTC.

2. Ignition ON, observe the BARO pressure parameter and compare the reading on the scan tool to the barometric pressure table. Refer to

Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and Control Systems/Specifications/Altitude Versus

Barometric Pressure).

瀚慖f the BARO pressure is not within the range specified for your altitude, refer to DTC P2227, P2228, or P2229 (LAU) ( See: P Code

Charts/P2227).

3. Engine at normal operating temperature, observe the Average Total Fuel Trim parameter with a scan tool. The Average Total Fuel Trim

should be between -22 to +23 percent.

瀚慖f not within the specified range, inspect for the following conditions:

* A mass air flow sensor signal that is skewed. If the Short Term Fuel Trim parameter changes greater than 20 percent when the MAF

sensor is disconnected, refer to DTC P0101 (LAU) (See: P Code Charts/P0101)DTC P0101 (LF1) (See: P Code Charts/P0101).

* A collapsed air intake duct

* A restricted air filter element-Refer to Air Cleaner Element Replacement (LF1) (See: Engine, Cooling and Exhaust/Engine/Tune-up and

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Action Taken When the DTC Sets

The module uses a default value for the missing parameters.

Conditions for Clearing the DTC

* A current DTC clears when the malfunction is no longer present.

* A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.

Diagnostic Aids

* Use the DTC Descriptor list above to determine the module which is not communicating.

* If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).

* Use Data Link References (See: Powertrain Management/Computers and Control Systems/Information Bus/Testing and Inspection/Initial

Inspection and Diagnostic Overview) to determine if the module uses high or low speed GMLAN serial data communications

* Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage

source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to

ground before replacing the module.

* This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is

equipped with the option that uses that module.

Reference Information

* Data Communication Schematics (See: Powertrain Management/Computers and Control Systems/Information Bus/Diagrams/Electrical

Diagrams)

* Control Module References (See: Testing and Inspection/Programming and Relearning)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Data Link Communications Description and Operation (See: Powertrain Management/Computers and Control Systems/Information

Bus/Description and Operation)

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)

Scan Tool References

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing

Note: If more than one module is not communicating use Data Communication Schematics (See: Powertrain Management/Computers and

Control Systems/Information Bus/Diagrams/Electrical Diagrams) to determine which module is closest to the DLC. Start diagnostics with that

module.

Terminal and connector identifiers will be different depending on the individual module being tested. Use Schematic Reference and Connector End

View Reference to determine which connector and terminal to access.

1. Using the DTC Descriptor and Diagnostic Aids, determine the module that is not communicating that should be tested.

2. Ignition OFF, disconnect the harness connector of the module that is not communicating.

3. Test for less than 2 ohms between the module ground circuits and ground.

瀚慖f greater than specified range, test the ground circuit for an open/high resistance.

Note: Only the high speed GMLAN modules have a wired serial data wake up circuit. Refer to the module schematics to identify which

modules have a wake up circuit. If the module that is not communicating does not have a serial data wake up circuit, proceed to step 5.

4. Ignition ON, verify that a test lamp illuminates between the high speed GMLAN serial data wake up circuit OR the accessory wake up serial

data circuit and ground.

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2010 Cadillac Truck SRX FWD V6-3.0L Page 1389

Action Taken When the DTC Sets

* DTCs P0300-P0306 are Type B DTCs.

* The ECM disables the fuel injector of the misfiring cylinder when a misfire is present.

Conditions for Clearing the DTC

DTCs P0300-P0306 are Type B DTCs.

Diagnostic Aids

* A misfire DTC could be caused by an excessive vibration from sources other than the engine. Inspect for the following possible sources:

- A tire or wheel that is out of round or out of balance

- Variable thickness brake rotors

- An unbalanced drive shaft

- Certain rough road conditions

- Transmission operation

- A damaged accessory drive component or belt; remove the belt and safely operate the engine to evaluate

* High resistance in the circuits of the injectors may set a misfire DTC without setting an injector DTC. Test the injector circuits of the affected

cylinder(s) for a high resistance if you suspect a condition.

* If the condition is intermittent, observing the scan tool IC Circuit Test and Fuel Injector Circuit Test Status parameters may help isolate the

condition. The circuit test status parameters will change from OK or Not Run to Fault if a condition exists.

* A condition in the heated O2 sensor (HO2S) heater control circuits may set a DTC P0300.

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

Special Tools

* J 26792 - Spark Tester

* For equivalent regional tools, refer to Special Tools (See: Powertrain Management/Computers and Control Systems/Tools and Equipment).

Circuit/System Verification

1. Engine idling at the normal operating temperature, there should be no abnormal engine noise.

瀚慖f there is an abnormal engine noise, refer to Symptoms - Engine Mechanical (See: Engine, Cooling and Exhaust/Engine/Testing and

Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Mechanical).

2. Verify that no other DTCs are set.

瀚慖f a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble

Code (DTC) List - Vehicle).

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2010 Cadillac Truck SRX FWD V6-3.0L Page 2071

Action Taken When the DTC Sets

The DTCs are Type C DTCs.

Conditions for Clearing the DTC

The DTCs are Type C DTCs.

Diagnostic Aids

* This diagnostic uses a comprehensive approach to the diagnosis of the KR31 auxiliary coolant pump relay and its related circuits. The

auxiliary coolant pump relay is a printed circuit board (PCB) relay. The relay is an integral component to the underhood bussed electrical

center (UBEC). It cannot be removed and it is not visible.

* Much of the diagnosis is performed at the ECM connectors. Great care should be taken to ensure that the correct terminals are tested and the

proper test probes are utilized when performing this diagnostic.

* The test lamp is used to provide a visual aid to observe the integrity of the KR31 relay, the UBEC and the relay control circuit.

* Grounding terminal X2-58 activates the powertrain relay, which will supply power through KR31 relay coil and the relay control circuit.

Under normal circumstances the test lamp will illuminate with dim intensity due to the load created by the KR31 relay coil. If the test lamp

does not illuminate, or illuminates brightly a condition exists in the KR31 relay control circuit or the UBEC.

Reference Information

Schematic Reference

* Engine Cooling Schematics (See: Engine, Cooling and Exhaust/Cooling System/Diagrams)

* 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. Ignition ON, verify that DTC P0480, P0691, or P0692, is not set.

瀚慖f a DTC is set, refer to DTC P0480, P0691, or P0692 (without/LF1) (See: P Code Charts/P0480) for further diagnosis.

Note: There is a slight delay before the cooling fan activates and reaches full speed.

2. Command the cooling fan ON from 20-90 % with a scan tool. Verify that the cooling fan turns ON and operates as commanded.

瀚慖f the cooling fan does not respond to the commanded states, refer to Cooling Fan Inoperative (LAU) (See: Engine, Cooling and

Exhaust/Cooling System/Testing and Inspection/Symptom Related Diagnostic Procedures/Cooling Fan Inoperative)Cooling Fan

Inoperative (LF1) (See: Engine, Cooling and Exhaust/Cooling System/Testing and Inspection/Symptom Related Diagnostic

Procedures/Cooling Fan Inoperative) for further diagnosis.

3. Ignition ON, command the KR31 auxiliary coolant pump relay ON and OFF with the scan tool. An audible click should be heard when

changing between the commanded states.

4. Start the engine, observe the DTC information with a scan tool. DTCs P2600, P2602, or P2603 should not set.

5. Ignition ON, engine off observe the DTC information with a scan tool. DTC P2601 should not set.

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2010 Cadillac Truck SRX FWD V6-3.0L Page 1125

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.

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

Special Tools

* J 23738-A - Mityvac

* J 35555 - Metal Mityvac

* For equivalent regional tools, refer to Special Tools (See: Powertrain Management/Computers and Control Systems/Tools and Equipment).

Circuit/System Verification

1. Verify that DTC P0641, P0651, or P0697 is not set.

瀚慖f any of the DTCs are set refer to DTC P0641, P0651, P0697, or P06A3 (LF1) (See: P Code Charts/P0641/ECM).

2. Ignition ON, observe the scan tool MAP Sensor parameter. The reading should be between 0.20-4.80 V.

3. 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 for 90 s, disconnect the harness connector at the B74 MAP sensor.

2. Test for less than 5 ohm between the low reference circuit terminal 2 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, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.

瀚慖f less than the specified range, test the 5 V reference 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 the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

4. Verify the scan tool MAP Sensor parameter is less than 1 kPa (0.2 psi).

瀚慖f greater than the specified range, test the signal circuit terminal 3 for a short to voltage. If the circuit tests normal, replace the K20 ECM.

5. Install a 3 A fused jumper wire between the signal circuit terminal 3 and the 5 V reference circuit terminal 1. Verify the scan tool MAP

2010 Cadillac Truck SRX FWD V6-3.0L Page 1911

2010 Cadillac Truck SRX FWD V6-3.0L Page 1911

Action Taken When the DTC Sets

* DTC P1876 is a Type C DTC.

* The TCM disables Tap shift functions.

Conditions for Clearing the DIC/DTC

DTC P1876 is a Type C DTC.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6T70/6T75 - Automatic Transmission/Transmission General Description)

* Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6T70/6T75 - Automatic Transmission/Electronic Component 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)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Verify there are no IMS DTCs set.

瀚慖f IMS DTCs are set, diagnose them first.

2. Ignition ON, transmission in Park, observe the scan tool Driver Shift Control parameter. The reading should display Inactive.

3. 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 transmission shift lever.

2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal A and ground.

瀚慖f the test lamp does not illuminate, test the IGN circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the BCM.

3. Verify the scan tool Driver Shift Request parameter indicates Invalid.

瀚慖f not the specified value, replace the BCM.

4. Ignition OFF, test for 300-600 ohms between the signal circuit terminal B and ground.

瀚慖f less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the BCM.

瀚慖f greater than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the BCM.

2010 Cadillac CTS Sedan AWD V6-3.6L Page 68

2010 Cadillac CTS Sedan AWD V6-3.6L Page 68

Action Taken When the DTC Sets

* The pedestrian impact detection module commands the DIC to display Service Pedestrian Protection System.

* The pedestrian impact detection module stores DTC in memory.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.

* A history DTC will clear once 40 malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

Object Detection Schematics (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Diagrams/Electrical

Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Object Detection Description and Operation (UD7 with Display) (See: Accessories and Optional Equipment/Collision Avoidance and Parking

Assist Systems/Description and Operation/Object Detection Description and Operation (UD7 with Display))Object Detection Description and

Operation (UD7 Audio Only) (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Description and

Operation/Object Detection Description and Operation (UD7 Audio Only))Object Detection Description and Operation (B3T) (See: Accessories

and Optional Equipment/Collision Avoidance and Parking Assist Systems/Description and Operation/Object Detection Description and Operation

(B3T))Object Detection Description and Operation (UVC) (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist

Systems/Description and Operation/Object Detection Description and Operation (UVC))

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the left active hood hinge actuator.

2. Ignition ON, test for less than 1 volt between the high control circuit terminal A and ground.

瀚慖f greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the pedestrian impact detection

module.

3. Test for less than 1 volt between the low control circuit terminal B and ground.

瀚慖f greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the pedestrian impact detection

module.

4. Ignition OFF, test for infinite resistance between the high control circuit terminal A and ground.

瀚慖f not the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the pedestrian impact detection module.

5. Test for infinite resistance between the low control circuit terminal B and ground.

瀚慖f not the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the pedestrian impact detection module.

6. Test for less then 1 ohm between the high control circuit terminal A and ground.

瀚慖f not within the specified range, test the circuit for an open/high resistance.

7. Test for less then 1 ohm between the low control circuit terminal B and ground.

瀚慖f not within the specified range, test the circuit for an open/high resistance.

8. If all circuits test normal, replace the left active hood hinge actuator.

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 106

Action Taken When the DTC Sets

* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator ON.

* The SDM will store a DTC, however if an event occurs the system will still attempt deployments.

Conditions for Clearing the DTC

* The condition for setting the DTC no longer exists.

* A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/Description and Operation/SIR System Description

and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

* J 38715-A SIR Driver/Passenger Load Tool

* SA9409Z-A SIR Driver/Passenger Load Tool

Circuit/System Testing

Note:

* Refer to SIR Service Precautions (See: Restraints and Safety Systems/Air Bag Systems/Service Precautions/Technician Safety Information).

* When removing connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the

affected component/connector:

- The pretensioner

- The inflatable restraint module

- The SDM

- The inflatable restraint module wiring harness connector

- The SDM wiring harness connector

Note: 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.

1. Verify that the appropriate inflator restraint module connector and the CPA are engaged.

瀚慖f the connector or CPA is not properly engaged, make the appropriate repair.

2. Ignition OFF, disconnect the harness connector at the appropriate inflator restraint module.

3. With the appropriate load tool adaptor, connect J 38715-A in place of the inflator restraint module.

4. Ignition ON, with a scan tool, verify DTC is set as current.

瀚慖f the DTC is not set or is set as history, cycle ignition OFF, disconnect the J 38715-A and the adapter, reconnect the harness connector

at the inflatable restraint module and cycle the ignition ON. If the DTC resets after reconnecting the module, replace the inflatable

restraint module.

5. Disconnect the harness connector at the SDM.

6. Ignition ON, test for less than 1 V between the appropriate high control circuit terminal and ground.

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 418

Action Taken When the DTC Sets

Mirror movement is suspended as long as the fault is present.

Conditions for Clearing the DTC

* A current DTC will clear when the fault is no longer present.

* A history DTC will clear after 40 malfunction-free ignition cycles.

Reference Information

Schematic Reference

Outside Rearview Mirror Schematics (See: Body and Frame/Mirrors/Diagrams/Electrical Diagrams/Outside Rearview Mirror Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Outside Mirror Description and Operation (See: Body and Frame/Mirrors/Description and Operation/Outside Mirror Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Command the left and right outside mirror to move up, down, left and right using the mirror directional switch. The mirror should move in the

commanded direction.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate outside rearview mirror.

2. Connect a test lamp between the control circuit terminal 3 and the control circuit terminal 2.

3. Ignition ON, command the mirror LEFT and RIGHT with a scan tool. The test lamp should turn ON when commanding the LEFT and

RIGHT states.

瀚慖f the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground or an open/high resistance on

either control circuits. If the circuits test normal, replace the appropriate door module.

4. Connect a test lamp between the control circuit terminal 1 and the control circuit terminal 2.

5. Ignition ON, command the mirror UP and DOWN with a scan tool. The test lamp should turn ON when commanding the UP and DOWN

states.

瀚慖f the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground or an open/high resistance on

either control circuits. If the circuits test normal, replace the door module.

6. If all circuits test normal, test or replace the outside rearview mirror motor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Outside Rearview Mirror Motor Replacement (See: Body and Frame/Mirrors/Power Mirror Motor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for DDM and PDM replacement, setup, and

programming

B1640

DTC B1640

Diagnostic Instructions

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 822

Action Taken When the DTC Sets

* DTCs P06AC, P06AD, and P06AE are Type C DTCs.

* The TCM allows the vehicle to operate in transmission protection mode.

Conditions for Clearing the DTC

DTCs P06AC, P06AD, and P06AE are Type C DTCs.

Diagnostic Aids

During a road test, the TCM Power-Up temperature should steadily increase to a normal operating temperature, and then stabilize.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

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/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

Description and Operation

Electronic Component Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and Operation/Electronic

Component Description)

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, clear the DTCs with a scan tool.

2. Operate the vehicle at 64 km/h (40 mph) for 10 minutes. Monitor the TCM Power-Up Temperature parameter and the TCM Temperature

parameter with a scan tool. The TCM Power-Up Temperature parameter and the TCM Temperature parameter should be within 10掳C (18掳F)

of each other.

瀚慖f the TCM Power-Up Temperature parameter is not within the specified value of the TCM Temperature parameter, then replace the Q8

control solenoid valve assembly.

3. 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.

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.

P06AD

DTC P06AC, P06AD, or P06AE

Diagnostic Instructions

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 1087

Action Taken When the DTC Sets

DTCs P0135, P0141, P0155, and P0161 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0135, P0141, P0155, and P0161 are Type B DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics (LLT) (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)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/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

Note: It may take up to 8 minutes for the DTC to set.

1. With the engine at normal operating temperature, operate the engine above 1,200 RPM for 2 minutes and then allow the engine to idle. DTCs

P0135, P0141, P0155, or P0161 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 appropriate HO2S.

2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal C and ground.

瀚慖f the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and

the ignition circuit fuse is open, test all the components connected to the ignition circuit and replace as necessary.

3. Ignition OFF, connect a test lamp between the heater control circuit terminal D and B+. The test light should not illuminate.

瀚慖f the test lamp illuminates, test the heater control circuit for a short to ground. If the circuit/connections test normal, replace the ECM.

4. Idle the engine, verify the test lamp illuminates or flashes.

瀚慖f the test lamp is always OFF, test the control circuit for an open/high resistance. If the circuit/connections test normal, replace the ECM.

Note: The control circuit for the HO2S heater is pulled-up to voltage within the ECM, 2.0-3.0 V on the control circuit is normal.

5. Ignition ON, test for 2.0-3.0 V between the control circuit terminal D and ground.

瀚慖f not within the specified range, test the control circuit for a short to voltage. If the circuit/connections test normal, replace the ECM.

6. If all circuits/connections test normal, test or replace the HO2S.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate HO2S.

2. Test for 5-25 ohm between terminals C and D of the HO2S.

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 276

Action Taken When the DTC Sets

* Rear parking assist system is disabled.

* The rear object sensor control module commands the red indicator ON.

* The rear object sensor control module sends a serial data message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST

message in the driver information center (DIC) and a chime will sound.

Conditions for Clearing

* The DTC will transition to history when the fault is no longer present.

* A history DTC will clear after 100 malfunction-free ignition cycles.

Reference Information

Schematic Reference

Object Detection Schematics (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Diagrams/Electrical

Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Object Detection Description and Operation (UD7 with Display) (See: Accessories and Optional Equipment/Collision Avoidance and Parking

Assist Systems/Description and Operation/Object Detection Description and Operation (UD7 with Display))Object Detection Description and

Operation (UD7 Audio Only) (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Description and

Operation/Object Detection Description and Operation (UD7 Audio Only))Object Detection Description and Operation (B3T) (See: Accessories

and Optional Equipment/Collision Avoidance and Parking Assist Systems/Description and Operation/Object Detection Description and Operation

(B3T))Object Detection Description and Operation (UVC) (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist

Systems/Description and Operation/Object Detection Description and Operation (UVC))

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Verify that DTC B1008 is not set.

If DTC is set, program the rear object sensor control module. If DTC resets, replace the rear object sensor control module.

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 Rear Object Sensor Control Module replacement,

setup, and programming.

Remote Functions

DTC B1008

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.

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 153

Action Taken When the DTC Sets

* The SDM defaults the seat position sensor to seat forward threshold.

* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

Conditions for Clearing the DTC

* The condition for setting the DTC no longer exists.

* A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/Description and Operation/SIR System Description

and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, observe the SDM Psgr. Seat Position Sensor parameter while moving the passenger seat fully forward and fully rearward. The

parameter should cycle between Forward to Rearward as the seat is moved in the respective direction and DTC B0080 should not set.

If the parameters are correct and DTC B0080 is set, replace the SDM.

Circuit/System Testing

Important: When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or

replacement of the affected component/connector:

* Seat position sensor

* SDM

* Seat position sensor wiring harness connector

* SDM wiring harness connector

1. Ignition OFF, disconnect the harness connector at the RF seat position sensor.

2. Test for less than 10 ohms between low reference circuit terminal 1 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 SDM.

3. Ignition ON, test for 4.5-5.5 volts between the signal circuit terminal 2 and ground.

瀚慖f less that the specified range, test the signal circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace

the SDM.

瀚慖f greater that the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the SDM.

4. If the circuits test normal, test or replace the seat position sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.

2010 Cadillac Truck SRX AWD V6-3.0L Page 1125

2010 Cadillac Truck SRX AWD V6-3.0L Page 1125

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.

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

Special Tools

* J 23738-A - Mityvac

* J 35555 - Metal Mityvac

* For equivalent regional tools, refer to Special Tools (See: Powertrain Management/Computers and Control Systems/Tools and Equipment).

Circuit/System Verification

1. Verify that DTC P0641, P0651, or P0697 is not set.

瀚慖f any of the DTCs are set refer to DTC P0641, P0651, P0697, or P06A3 (LF1) (See: P Code Charts/P0641/ECM).

2. Ignition ON, observe the scan tool MAP Sensor parameter. The reading should be between 0.20-4.80 V.

3. 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 for 90 s, disconnect the harness connector at the B74 MAP sensor.

2. Test for less than 5 ohm between the low reference circuit terminal 2 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, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.

瀚慖f less than the specified range, test the 5 V reference 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 the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

4. Verify the scan tool MAP Sensor parameter is less than 1 kPa (0.2 psi).

瀚慖f greater than the specified range, test the signal circuit terminal 3 for a short to voltage. If the circuit tests normal, replace the K20 ECM.

5. Install a 3 A fused jumper wire between the signal circuit terminal 3 and the 5 V reference circuit terminal 1. Verify the scan tool MAP

2010 Cadillac Truck SRX AWD V6-3.0L Page 1196

2010 Cadillac Truck SRX AWD V6-3.0L Page 1196

Action Taken When the DTC Sets

DTCs P0134, P0140, P0154, and P0160 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0134, P0140, P0154, and P0160 are Type B DTCs.

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)

* Heated Oxygen Sensor Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical

Diagnostic Procedures/Wiring Repairs/Heated Oxygen Sensor 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 no B52 HO2S heater DTCs are set.

瀚慖f a B52 HO2S heater DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).

2. Engine running, observe the appropriate scan tool B52 HO2S voltage parameter. The reading should be within the range of 50-1,050 mV.

3. 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

Note: All modules must be powered down or misdiagnosis may result.

1. Ignition OFF, disconnect the appropriate B52 HO2S harness connector.

2. Ignition ON, observe the appropriate scan tool HO2S voltage parameter. The parameter should display 1.27 V.

瀚慖f less than the specified range, test the high and low signal circuits for a short to ground. If both signal circuits test normal, replace the

K20 ECM.

3. Ignition ON, test for 2.5-3.0 V between the high signal circuit terminal B and ground.

瀚慖f less than the specified range, test the high signal circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.

瀚慖f greater than the specified range, test the high signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

4. Ignition OFF, connect a 3 A fused jumper wire between the high signal circuit terminal B and the low signal circuit terminal A.

Note: The low signal circuit is tied to a pull-up circuit within the ECM. A voltage of 0.90-1.10 V on the low signal circuit is normal.

5. Ignition ON, verify the scan tool HO2S parameter displays 0.0 V.

2010 Cadillac Truck SRX AWD V6-3.0L Page 694

2010 Cadillac Truck SRX AWD V6-3.0L Page 694

Action Taken When the DTC Sets

Washer operation is suspended.

Conditions for Clearing the DTC

* A current DTC clears when the diagnostic runs and passes.

* A history DTC will clear after 50 consecutive ignition cycles without a fault present.

Diagnostic Aids

The headlamp wash feature shall only be allowed to be activated if the low or high beam headlamps are active too.

Reference Information

Schematic Reference

Wiper/Washer Schematics (See: Wiper and Washer Systems/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Wiper/Washer System Description and Operation (See: Wiper and Washer Systems/Description and Operation)

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)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for diagnostic tester information

Circuit/System Verification

Operate the headlamp washer using the S80 Window Wiper/Washer Switch. Verify the G16 Headlamp Washer Fluid Pump activates. The low or

high beam headlamps are ON.

Circuit/System Testing

1. Ignition OFF, disconnect the KR2 Headlamp Washer Fluid Pump Relay.

2. Test for less than 5 ohm between the ground circuit terminal 85 and ground

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance

3. Connect a test lamp between the control circuit terminal 86 and ground.

4. Ignition ON, command the headlamp washer ON and OFF using the wiper switch. The test lamp should turn ON and OFF when changing

between the commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the K9 Body Control

Module.

瀚慖f the test lamp is always OFF, test for a short to ground or an open/high resistance on the control circuit. If the circuit tests normal, test or

replace the K9 Body Control Module.

5. If all circuits test normal, test or replace the KR2 Headlamp Washer Fluid Pump Relay.

Component Testing

Relay Test

1. Ignition OFF, connect the KR2 Headlamp Washer Fluid Pump Relay.

2. Test for 60-200 ohm between terminals 85 and 86.

瀚慖f the resistance is not within the specified range, replace the relay.