2010 Cadillac Truck SRX FWD V6-3.0L Page 896

2010 Cadillac Truck SRX FWD V6-3.0L Page 896

* 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 scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool EBCM Wheel Speed Sensor parameters. The reading should be the same speed on all sensors when driving in a

straight line at a speed greater than 20 km/h (13 MPH).

Circuit/System Testing

1. Ignition ON, verify that DTC C0035, C0040, C0045, or C0050 is not present in the EBCM.

瀚慖f any listed DTC is present, refer to DTC C0035, C0040, C0045, or C0050 (See: C Code Charts/C0035) to diagnose that DTC prior to

this diagnostic.

2. Replace the K17 Electronic Brake Control Module (EBCM) and verify the DTC does not reset.

瀚慖f the DTC resets, replace the module that set the DTC.

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 module replacement, setup and programming

C1225

DTC C1207-C1210, C1221-C1228, or C1232-C1235

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 Descriptor

DTC C1207 00

- Left Front Wheel Speed Sensor Circuit High Input Malfunction

DTC C1208 00

- Right Front Wheel Speed Sensor Circuit High Input Malfunction

DTC C1209 00

- Left Rear Wheel Speed Sensor Circuit High Input Malfunction

DTC C1210 00

- Right Rear Wheel Speed Sensor Circuit High Input Malfunction

DTC C1221 00

- Left Front Wheel Speed Sensor Circuit Malfunction

DTC C1222 00

- Right Front Wheel Speed Sensor Circuit Malfunction

DTC C1223 00

- Left Rear Wheel Speed Sensor Circuit Malfunction

DTC C1224 00

- Right Rear Wheel Speed Sensor Circuit Malfunction

2010 Cadillac Truck SRX FWD V6-3.0L Page 1644

2010 Cadillac Truck SRX FWD V6-3.0L Page 1644

* 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

DT-47825-20 - Adapter Harness

Circuit/System Verification

1. Ignition ON, verify with a scan tool the High Side Driver 1 parameter displays Enabled.

2. Engine Running, gear selector lever in Park position. Verify with a scan tool the following test status parameters displays OK:

* High Side Driver. 1 Ckt. Low Voltage Test Status

* High Side Driver. 1 Ckt. Open Test Status

* High Side Driver. 1 Ckt. High Voltage Test Status

3. Operate the vehicle within the Conditions for Running and Setting the DTC. The DTCs should not set. You may also operate the vehicle

within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: You must perform the Circuit/System Verification first.

1. 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).

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6T70/6T75 - Automatic Transmission/Control

Solenoid Valve and Transmission Control Module Assembly Inspection).

3. Place the control solenoid valve assembly on a clean work surface near the transmission assembly.

4. Connect DT-47825-20 - adapter harness between the vehicle wire harness electrical connector, and the control solenoid valve assembly

electrical connector.

5. Ignition ON, verify with a scan tool the following test status parameters display OK:

* High Side Driver. 1 Ckt. Low Voltage Test Status

* High Side Driver. 1 Ckt. Open Test Status

* High Side Driver. 1 Ckt. High Voltage Test Status

瀚慖f any test status parameter displays Fault or Malfunction, replace the control solenoid valve assembly.

Repair Instructions

Note:

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

* Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission

and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/6T70/6T75 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

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

Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement, setup,

and programming

P0667

DTC P0667, P0668, or P0669

Diagnostic Instructions

2010 Cadillac Truck SRX FWD V6-3.0L Page 1675

2010 Cadillac Truck SRX FWD V6-3.0L Page 1675

* 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. Perform the Transmission Fluid Level and Condition Check (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing

and Inspection/Symptom Related Diagnostic Procedures/AF40-6 - Automatic Transmission/Transmission Fluid Level and Condition Check)

to verify correct fluid level.

2. Engine idling at operating temperature, observe the scan tool Transmission Fluid Temperature parameter. The reading should be between -40

to +215掳C (-40 to +488掳F) and change.

3. Operate the vehicle at about 60 km/h (37 MPH) for 10 min. Verify the scan tool Transmission Fluid Temperature parameter varies by more

than 2掳C (3.5掳F) to verify that the sensor is not stuck.

Circuit/System Testing

Operate the vehicle within the conditions for running and setting 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.

Component Testing

Static Test

1. Ignition OFF, remove the K71 Transmission Control Module.

2. Ignition OFF, test for infinite resistance between the low reference circuit terminal 7 X2 and ground.

瀚慖f less than the specified range, replace the wiring harness.

3. Ignition OFF, test for infinite resistance between the signal circuit terminal 8 X2 and ground.

瀚慖f less than the specified range, replace the wiring harness.

4. Test for infinite resistance between each terminal and the low reference circuit terminal 7 X2 and also to the signal circuit terminal 8 X2.

瀚慖f less than the specified range, replace the wiring harness.

5. Test for the resistance between the B13 Automatic Transmission Fluid Temperature Sensor signal circuit terminal 7 X2 and the low reference

circuit terminal 8 X2. Refer to Transmission Fluid Temperature Sensor Specifications (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Specifications/Pressure, Vacuum and Temperature Specifications) for the resistance values.

瀚慖f not within the specified range, replace the wiring harness.

6. If the circuit test normal, replace the K71 Transmission Control Module.

Repair Instructions

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

* Wiring harness-Refer to Automatic Transmission Wiring Harness Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Wiring Harness/Service and Repair) for replacement.

* TCM-Refer to Control Module References (See: Testing and Inspection/Programming and Relearning) for replacement, setup, and

programming.

* Perform the Transmission Adaptive Functions (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/AF40-6 - Automatic Transmission/Transmission Adaptive Functions).

6T70/6T75 - Automatic Transmission

DTC P0711, P0712, or P0713

Diagnostic Instructions

2010 Cadillac Truck SRX FWD V6-3.0L Page 1960

2010 Cadillac Truck SRX FWD V6-3.0L Page 1960

* 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 DTCs P0697 or P06A3 are not set.

瀚慖f a DTC is set, refer to DTC P0641, P0651, P0697, or P06A3 (LF1) (See: P Code Charts/P0641/ECM) for further diagnosis.

2. Ignition ON, observe the scan tool Accelerator Pedal Position percentage parameter. The scan tool should display 0 percent.

3. Observe the scan tool APP Sensor 1 and 2 Agree/Disagree parameter while performing the following tests:

* Rapidly depress the accelerator pedal from the rest position to the wide open throttle position (WOT) and release pedal. Repeat the

procedure several times.

* Slowly depress the accelerator pedal to WOT and then slowly return the pedal to closed throttle. Repeat the procedure several times.

The APP Sensor 1 and 2 Agree/Disagree parameter should display Agree.

4. Observe the DTC information with a scan tool. DTCs P2122, P2123, P2127, P2128, or P2138 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 B107 accelerator pedal assembly.

2. Ignition OFF for 1 minute, test for less than 5 ohm between the low reference circuit terminals listed below and ground.

* Low reference circuit terminal 4

* Low reference circuit terminal 5

瀚慖f greater than the specified range, test the appropriate 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 both 5-volt reference circuit terminals listed below and ground.

* 5 volt reference circuit terminal 1

* 5 volt reference circuit terminal 2

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

4. Verify the appropriate APP sensor voltage parameter is at 0 V.

瀚慖f greater than the specified range, test the appropriate signal circuit terminal listed below for a short to voltage. If the circuit tests normal,

replace the K20 ECM.

* APP sensor 1 signal circuit terminal 3

* APP sensor 2 signal circuit terminal 6

5. Install a 3 A fused jumper wire between the appropriate signal circuit listed below and the 5-volt reference circuit terminal 1. Verify the

appropriate APP sensor voltage parameter is greater than 4.8 V.

* APP sensor 1 signal circuit terminal 3

* APP sensor 2 signal circuit terminal 6

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

normal, replace the K20 ECM.

6. If all circuits test normal, replace the B107 accelerator pedal assembly.

2010 Cadillac Truck SRX FWD V6-3.0L Page 1927

2010 Cadillac Truck SRX FWD V6-3.0L Page 1927

* 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. With the engine at normal operating temperature, raise the engine speed to 2,000 RPM for 10 s. DTCs P0010, P0013, P0020, P0023, P2088,

P2089, P2090, P2091, P2092, P2093, P2094, or P2095 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 Q6 Camshaft Position Actuator Solenoid Valve.

2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.

瀚慖f the test lamp does not illuminate, test the 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. Connect a DMM, set on the diode setting, between the control circuit terminal 2 and ground. The voltage should be greater than 2 V.

瀚慖f the DMM displays OL, test the control circuit for a short to voltage or an open/high resistance. If the circuit/connections test normal,

replace the K20 Engine Control Module.

瀚慖f less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the K20 Engine Control

Module.

4. Command the Camshaft Position Actuator Solenoid Valve ON and OFF with a scan tool. The DMM should transition from greater than 2 V

when commanded OFF to less than 1 V, when commanded ON.

瀚慖f the circuit voltage does not correspond to the specified values, replace the K20 Engine Control Module.

5. If all circuits/connections test normal, test or replace the appropriate Q6 Camshaft Position Actuator Solenoid Valve.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve.

2. Test for 7-12 ohm between the control terminal 2 and the ignition terminal 1 of the Q6 Camshaft Position Actuator Solenoid Valve.

瀚慖f not within the specified range, replace the Q6 Camshaft Position Actuator Solenoid Valve.

3. Test for infinite resistance between each terminal and the Q6 Camshaft Position Actuator Solenoid Valve housing.

瀚慖f not the specified value, replace the Q6 Camshaft Position Actuator Solenoid Valve.

Repair Instructions

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

* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake (See: Engine, Cooling and

Exhaust/Engine/Actuators and Solenoids - Engine/Variable Valve Timing Solenoid/Service and Repair/Camshaft Position Actuator Solenoid

Valve Solenoid Replacement - Bank 1 (Right Side) Intake)

* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust (See: Engine, Cooling and

Exhaust/Engine/Actuators and Solenoids - Engine/Variable Valve Timing Solenoid/Service and Repair/Camshaft Position Actuator Solenoid

Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust)

* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake (See: Engine, Cooling and

Exhaust/Engine/Actuators and Solenoids - Engine/Variable Valve Timing Solenoid/Service and Repair/Camshaft Position Actuator Solenoid

Valve Solenoid Replacement - Bank 2 (Left Side) Intake)

* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust (See: Engine, Cooling and

Exhaust/Engine/Actuators and Solenoids - Engine/Variable Valve Timing Solenoid/Service and Repair/Camshaft Position Actuator Solenoid

Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust)

2010 Cadillac Truck SRX AWD V6-3.0L Page 1060

2010 Cadillac Truck SRX AWD V6-3.0L Page 1060

* 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 35616-200 - Test Lamp Kit

Diagnostic Aids

* The engine oil condition has a major impact on the camshaft actuator system.

* A low oil level condition may set this DTC. The engine may require an oil change. Inquire with the customer when the last oil change was

performed. You may also monitor the scan tool Engine Oil Life parameter. Advise the customer an oil change may be required.

* Inspect the engine for any recent engine mechanical repairs. An incorrectly installed camshaft, camshaft actuator, or timing chain can cause

this DTC to set.

Circuit/System Verification

Note: The engine oil level and the oil pressure are critical to the correct operation of the camshaft position actuator system. Verify that the

engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.

1. Ignition ON, observe the scan tool DTC information. Verify that none of the following DTCs are set. DTC P0016, P0017, P0018, P0019,

P0335, P0336, P0338, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P0521, P0522, P0523,

P0638, P2100, P2101, P2102, P2103, or P2119.

瀚慖f any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

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

2. Engine idling, command the appropriate Camshaft Position Actuator from 0 degrees to 40 degrees and back to zero while observing the

appropriate scan tool Camshaft Position Variance parameters. The Camshaft Position Variance should be less than 2 degrees in each of the

commanded states.

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 appropriate Q6 Camshaft Position Actuator Solenoid Valve.

2. Ignition ON, load test for B+ between the ignition circuit terminal 1 and ground.

瀚慖f less than the specified range, test the ignition voltage 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.

Note: Use the J 35616-200 - Test Lamp Kit for this test. If the J 35616-200 - Test Lamp Kit is not available, use a test lamp that measures

greater than 20 ohm.

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

Note: The voltage must be measured at the control side of the circuit.

4. Command the appropriate Camshaft Position Actuator Solenoid Valve ON with a scan tool. Load test for less than 1 V between the control

circuit terminal 2 and ground.

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

K20 Engine Control Module.

5. Remove the Camshaft Position Actuator Solenoid Valve. Inspect the Camshaft Position Actuator Solenoid Valve and mounting area for the

following conditions:

* For a torn, restricted, mis-positioned, or missing screens at the Camshaft Position Actuator Solenoid Valve

* For engine oil leaks between the oil sealing lands of the Camshaft Position Actuator Solenoid Valve. Inspect the lands of the Camshaft

Position Actuator Solenoid Valve for nicks

* For oil seepage at the Camshaft Position Actuator Solenoid Valve connector

2010 Cadillac Truck SRX AWD V6-3.0L Page 535

2010 Cadillac Truck SRX AWD V6-3.0L Page 535

* 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 scan tool information

Circuit/System Testing

B2425 0B, B2425 0D, or B2425 0E

1. Ignition OFF, disconnect the harness connector at the E14A seat back heating element.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

2. Test for 0.5 - 5 Ohms between terminal A and terminal B.

瀚慖f not within the specified range, replace the E14A seat back heating element.

3. Connect the harness connector at the E14A seat back heating element and disconnect the X2 harness connector at the K29 seat heating

control module.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

4. Test for 1 - 7 Ohms between control circuit terminal 3 and control circuit terminal 1.

瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the E14B seat cushion

heating element.

瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the E14B seat

cushion heating element.

5. If all circuits test normal, replace the K29 seat heating control module.

B2430 0B, B2430 0D, or B2430 0E

1. Ignition OFF, disconnect the harness connector at the E14C seat back heating element.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

2. Test for 0.5 - 5 Ohms between terminal A and terminal B.

瀚慖f not within the specified range, replace the E14C seat back heating element.

3. Connect the harness connector at the E14C seat back heating element and disconnect the X2 harness connector at the K29 seat heating

control module.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

4. Test for 1 - 7 Ohms between control circuit terminal 5 and control circuit terminal 2.

瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the E14D seat cushion

heating element.

瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the E14D seat

cushion heating element.

5. If all circuits test normal, replace the K29 seat heating control module.

Repair Instructions

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

* Driver or Passenger Seat Back Cushion Heater Replacement (See: Body and Frame/Seats/Seat Temperature Element/Service and

Repair/Driver or Passenger Seat Back Cushion Heater Replacement)

* Driver or Passenger Seat Cushion Heater Replacement (See: Body and Frame/Seats/Seat Temperature Element/Service and Repair/Driver or

Passenger Seat Cushion Heater Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for seat heating control module replacement, setup,

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2777

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2777

* 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 scan tool information

Circuit/System Verification

Verify that DTC U1814, U2099, B1428, B1370, B1380, B1440, or B1441 is not set.

If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic

Trouble Code (DTC) List - Vehicle).

Circuit/System Testing

Note: Use the schematic to identify the following:

* Control modules the vehicle is equipped with

* Control module locations on the low and high speed GMLAN serial data circuits

* The control modules B+, ignition, ground, communication enable and serial data circuit terminals

1. Determine the control module that is not communicating. Refer to Control Module U Code List (See: Diagnostic Trouble Code

Descriptions/Control Module U Code List).

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

3. Test for less than 10 ohm between each ground circuit terminal and ground.

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

4. If equipped, verify that a test lamp illuminates between each B+ circuit terminal and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit fuse is open, test the

control circuits of the control module for a short to ground. If the circuits test normal, replace the control module.

5. If equipped, ignition ON, verify that a test lamp illuminates between each ignition circuit terminal 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 fuse is open, test

the control circuits of the control module for a short to ground. If the circuits test normal, replace the control module.

Note: Only the high speed GMLAN modules have a serial data communication enable circuit OR an accessory wakeup serial data circuit,

and the BCM is the output for these circuits. Refer to the control module schematics to identify which control modules have these circuits.

6. If equipped, ignition ON, verify that a test lamp illuminates between the communication enable circuit terminal OR the accessory wakeup

circuit terminal and ground.

瀚慖f the test lamp does not illuminate, test the circuit for an open/high resistance. If the circuits test normal, replace the BCM.

7. Ignition OFF for 60 seconds, test for less than 5 ohm between the serial data circuit terminals and the appropriate DLC terminal listed below:

* Class 2 serial data circuit terminal 2

* Low speed GMLAN serial data terminal 1

* High speed GMLAN serial data terminal 6 or 14

瀚慖f greater than the specified range, test the serial data circuit for an open/high resistance between the non communicating control module

and a control module setting the DTC or a serial data splice pack.

8. If all circuits test normal, replace the control module that is not communicating.

Repair Instructions

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

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

Procedures/Wiring Repairs/GMLAN Wiring Repairs)

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

2010 Cadillac Truck SRX AWD V6-3.0L Page 896

2010 Cadillac Truck SRX AWD V6-3.0L Page 896

* 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 scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool EBCM Wheel Speed Sensor parameters. The reading should be the same speed on all sensors when driving in a

straight line at a speed greater than 20 km/h (13 MPH).

Circuit/System Testing

1. Ignition ON, verify that DTC C0035, C0040, C0045, or C0050 is not present in the EBCM.

瀚慖f any listed DTC is present, refer to DTC C0035, C0040, C0045, or C0050 (See: C Code Charts/C0035) to diagnose that DTC prior to

this diagnostic.

2. Replace the K17 Electronic Brake Control Module (EBCM) and verify the DTC does not reset.

瀚慖f the DTC resets, replace the module that set the DTC.

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 module replacement, setup and programming

C1225

DTC C1207-C1210, C1221-C1228, or C1232-C1235

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 Descriptor

DTC C1207 00

- Left Front Wheel Speed Sensor Circuit High Input Malfunction

DTC C1208 00

- Right Front Wheel Speed Sensor Circuit High Input Malfunction

DTC C1209 00

- Left Rear Wheel Speed Sensor Circuit High Input Malfunction

DTC C1210 00

- Right Rear Wheel Speed Sensor Circuit High Input Malfunction

DTC C1221 00

- Left Front Wheel Speed Sensor Circuit Malfunction

DTC C1222 00

- Right Front Wheel Speed Sensor Circuit Malfunction

DTC C1223 00

- Left Rear Wheel Speed Sensor Circuit Malfunction

DTC C1224 00

- Right Rear Wheel Speed Sensor Circuit Malfunction

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2014

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2014

* 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)

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

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

Repairs/Wiring Repairs)

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

Procedures/Connector Repairs/Connector 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 35616 GM Approved Terminal Test Kit

Circuit/System Verification

1. Engine at operating temperature, observe DTC information with a scan tool. DTC P0324, P0325, P0326, P0327, P0328, P0330, P0332, or

P0333 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

P0324

Note: If DTC P0325, P0326, P0327, P0328, P0330, P0332, or P0333 are also set, diagnose those DTCs first.

DTC P0324 indicates an internal control module circuitry failure. Replace the ECM.

P0325, P0326, P0327, P0328, P0330, P0332, P0333

1. Ignition OFF, disconnect the affected KS.

2. Ignition OFF. Connect a DMM to both KS signal circuits, terminals A and B, at the affected KS. Set the DMM to the 400 mV AC scale,

select the Hz mode. Let the reading stabilize at 0 Hz.

Note: DO NOT tap on plastic engine components.

3. Tap on the engine block with a non-metallic object near the affected KS and observe the DMM for a fluctuating frequency.

瀚慖f the DMM does not display a fluctuating frequency while tapping on the engine block then replace the affected KS.

4. Verify the affected KS is properly tightened, refer to Fastener Tightening Specifications (See: Engine, Cooling and

Exhaust/Engine/Specifications/Fastener Tightening Specifications).

5. Ignition OFF, with appropriate length jumper wires, connect the KS1 harness to the KS2 sensor and the KS2 harness to the KS1 sensor.

6. Monitor the DTCs using a scan tool. Operate the vehicle within the conditions for running the DTC. Verify the fault does not follow the

sensor in question.

瀚慖f the fault follows the sensor in question, replace the appropriate KS.

7. Ignition OFF, remove the jumper wires from the previous step.

8. Measure for 2-3 volts between each of the following circuits and ground on the ECM side of the harness connector:

* The KS signal circuit, terminal A

* The KS signal circuit, terminal B

瀚慖f less than the specified range, test the circuits for a short to ground or an open/high resistance. If the circuits test normal, replace the

ECM.

瀚慖f greater than the specified range, test the circuits for a short to voltage. If the circuits test normal, replace the ECM.

9. Test for intermittent or poor connections at the ECM, KS, and in-line connectors where present.

10. If all circuits test normal, replace the ECM.

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1959

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1959

* 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 that DTC P0641 or P0651 are not set.

瀚慖f a DTC is set, refer to DTC P0641 or P0651 (ECM) (See: P Code Charts/P0641) for further diagnosis.

2. Observe the TP sensor 1 and 2 voltage parameters. Both parameters should be between 1.0-4.0 V and change with accelerator pedal input.

Note: If the Throttle Sweep Test is not available on the scan tool, use the accelerator to perform the test. Refer to Diagnostic Aids for further

details.

3. Perform the Throttle Sweep Test while observing the TP Sensor 1 and 2 Agree/Disagree parameter with a scan tool. The TP Sensor 1 and 2

Agree/Disagree parameter should display Agree.

4. Clear the DTCs with the scan tool. Operate the vehicle within the Conditions for Running the DTC or within the conditions that you observed

from the Freeze Frame/Failure Records.

5. Ignition ON, observe the DTC information with a scan tool. Verify that DTC P0120 or P0220 are not the only TP sensor DTCs set.

瀚慖f DTC P0120 or P0220 are the only DTCs set, replace the ECM.

6. 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 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 an open/high resistance. If the circuit tests normal, replace the 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 an open/high resistance. If the circuit tests normal,

replace the 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 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 ECM.

5. 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 ECM.

6. 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

ECM.

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

7. If all circuits test normal, test or replace the throttle body assembly.

Repair Instructions

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

2010 Cadillac Truck SRX AWD V6-3.0L Page 645

2010 Cadillac Truck SRX AWD V6-3.0L Page 645

* 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 scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool BCM Central Door Lock Switch on Console parameter. The reading should be Inactive and change to Lock and

Unlock when pushing the appropriate switch.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the A20 radio/HVAC control.

2. Ignition ON, verify the scan tool Central Door Lock Switch on Center Console parameter is Inactive.

瀚慖f the value is Lock , test the signal circuit terminal 12 for a short to ground. If the circuit tests normal, replace the K9 BCM.

瀚慖f the value is Unlock , test the signal circuit terminal 13 for a short to ground. If the circuit tests normal, replace the K9 BCM.

3. If all circuits test normal, replace the A20 radio/HVAC control.

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 BCM and HVAC control replacement, setup and

programming

B3155

DTC B3155

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 Descriptor

DTC B3155 00

- Passenger Exterior Lock Sensor Malfunction

Diagnostic Fault Information

Circuit/System Description

The exterior passenger door handle contains a small sensor which allows a person to lock the vehicle doors from the outside without using the

remote keyless transmitter. The keyless entry control module monitors the voltage level on the passenger door handle switch signal circuit, when

the switch is pressed, the voltage in the signal circuit will drop and the keyless entry control module will then send a serial data message to the

BCM to command all the doors to lock.

Conditions for Running the DTC

Battery voltage is between 9-16 V.

Conditions for Setting the DTC

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.

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1751

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1751

* 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

1. If DTC P0641 or P0651 are set, refer to DTC P0641 or P0651 (ECM) (See: P Code Charts/P0641).

2. Verify that restrictions do not exist in the exhaust system. Refer to Restricted Exhaust (See: Engine, Cooling and Exhaust/Exhaust

System/Testing and Inspection/Restricted Exhaust).

3. Verify that the engine is in good mechanical condition. Refer to Symptoms - Engine Mechanical (See: Engine, Cooling and

Exhaust/Engine/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Mechanical) for the 4.8L, 5.3L, 6.0L

and 6.2L engine.

4. Ignition OFF for 90 s, determine the current vehicle testing altitude. Ignition ON, observe the scan tool BARO Sensor parameter. Compare

the parameter to the Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and Control

Systems/Specifications/Altitude Versus Barometric Pressure) table. The BARO sensor pressure parameter should be within the specified

range indicated in the table.

5. A skewed MAP sensor will also cause the first and second intake manifold models to disagree with the actual MAP sensor measurements.

Use the scan tool and compare the MAP Sensor parameter to a known good vehicle under various operating conditions. The readings should

be within 3 kPa of the known good vehicle.

6. Ignition ON, observe the scan tool MAP sensor parameter. Start the engine. The MAP Sensor parameter should change.

瀚慖f the vehicle passes the Circuit System Verification Test, operate the vehicle within the Conditions for Running the DTC. You may also

operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records list.

Circuit/System Testing

Note: All electrical components and accessories must be turned OFF and allowed to power down.

1. Verify the integrity of the air induction system by inspecting for the following conditions:

* Any damaged components

* Loose or improper installation

* Improperly routed vacuum hoses

* Any vacuum leak

* Any type of restriction

* MAP sensor seal that is missing or damaged

2. Verify that restrictions do not exist in the MAP sensor vacuum source.

3. Verify that restrictions do not exist in the exhaust system. Refer to Restricted Exhaust (See: Engine, Cooling and Exhaust/Exhaust

System/Testing and Inspection/Restricted Exhaust).

4. Ignition OFF, disconnect the MAP harness connector at the MAP sensor.

5. 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 value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

6. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal C 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 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 ECM.

7. 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.

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

Sensor parameter is greater than 103 kPa.

2010 Cadillac Truck SRX AWD V6-3.0L Page 543

2010 Cadillac Truck SRX AWD V6-3.0L Page 543

* 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 scan tool information

Circuit/System Testing

B2425 0B, B2425 0D, or B2425 0E

1. Ignition OFF, disconnect the harness connector at the E14A seat back heating element.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

2. Test for 0.5 - 5 Ohms between terminal A and terminal B.

瀚慖f not within the specified range, replace the E14A seat back heating element.

3. Connect the harness connector at the E14A seat back heating element and disconnect the X2 harness connector at the K29 seat heating

control module.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

4. Test for 1 - 7 Ohms between control circuit terminal 3 and control circuit terminal 1.

瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the E14B seat cushion

heating element.

瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the E14B seat

cushion heating element.

5. If all circuits test normal, replace the K29 seat heating control module.

B2430 0B, B2430 0D, or B2430 0E

1. Ignition OFF, disconnect the harness connector at the E14C seat back heating element.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

2. Test for 0.5 - 5 Ohms between terminal A and terminal B.

瀚慖f not within the specified range, replace the E14C seat back heating element.

3. Connect the harness connector at the E14C seat back heating element and disconnect the X2 harness connector at the K29 seat heating

control module.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

4. Test for 1 - 7 Ohms between control circuit terminal 5 and control circuit terminal 2.

瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the E14D seat cushion

heating element.

瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the E14D seat

cushion heating element.

5. If all circuits test normal, replace the K29 seat heating control module.

Repair Instructions

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

* Driver or Passenger Seat Back Cushion Heater Replacement (See: Body and Frame/Seats/Seat Temperature Element/Service and

Repair/Driver or Passenger Seat Back Cushion Heater Replacement)

* Driver or Passenger Seat Cushion Heater Replacement (See: Body and Frame/Seats/Seat Temperature Element/Service and Repair/Driver or

Passenger Seat Cushion Heater Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for seat heating control module replacement, setup,

2010 Cadillac Truck SRX AWD V6-3.0L Page 437

2010 Cadillac Truck SRX AWD V6-3.0L Page 437

* 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 scan tool information

Circuit/System Verification

If this DTC is retrieved as a current DTC, replace the radio.

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 radio replacement, setup, and programming

B1278

DTC B1278 or B1279

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 B1278 01

- Left Auxiliary Input Signal Circuit Short to Battery

DTC B1278 02

- Left Auxiliary Input Signal Circuit Short to Ground

DTC B1279 01

- Right Auxiliary Input Signal Circuit Short to Battery

DTC B1279 02

- Right Auxiliary Input Signal Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

A remote 3.5 mm auxiliary stereo jack allows playback of audio signals from remote devices (e.g., laptop computer, IPOD, MP3 player, etc.).

When a remote device audio mini-plug is inserted in the remote auxiliary jack, an internal mechanical switch closes completing the aux jack detect

circuit to the radio. The radio automatically detects the input through the circuit and the device begins playing. The radio receives the devices audio

signals on the auxiliary input 1 (left) signal circuit and auxiliary input 2 (right) signal circuit. If equipped with a multimedia player interface

module, the auxiliary inputs that would normally connect directly to the radio will have the multimedia player interface module inline of those

connections. This means that the auxiliary inputs for the radio connect to the multimedia player interface module, and the multimedia player

2010 Cadillac Truck SRX AWD V6-3.0L Page 1302

2010 Cadillac Truck SRX AWD V6-3.0L Page 1302

* 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 Testing

1. Read and record the Freeze Frame/Failure Records data taking note of the speed and load at which the DTC set.

2. Diagnose any other DTCs that are set. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

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

3. With the engine idling and the transmission in the Park or Neutral position, observe the manifold absolute pressure (MAP) sensor parameter.

The MAP sensor parameter should be between 20-48 kPa (2.9-7.0 psi).

瀚慖f the MAP sensor parameter is not between 20-48 kPa (2.9-7.0 psi), refer to DTC P0106 (LF1) (See: P Code Charts/P0106) or DTC

P0107 or P0108 (LF1) (See: P Code Charts/P0107).

4. Inspect the air induction system for modified, damaged, leaking, or restricted components.

5. Inspect the crankcase ventilation system for improper operation.

6. Inspect the vacuum hoses for splits, kinks, and improper connections.

7. Inspect for vacuum leaks at the intake manifold, the throttle body, and the injector O-rings.

8. Test for a restricted, damaged, leaking, or modified exhaust system from the catalytic converter forward. Refer to Symptoms - Engine

Exhaust (See: Engine, Cooling and Exhaust/Exhaust System/Testing and Inspection/Symptoms - Engine Exhaust).

9. Test the fuel injectors for improper operation. Refer to 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).

10. Test for fuel contamination. Refer to Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool) (See: Powertrain Management/Fuel Delivery

and Air Induction/Fuel/Testing and Inspection/Alcohol/Contaminants-in-Fuel Diagnosis (Special Tool))Alcohol/Contaminants-in-Fuel

Diagnosis (Without Special Tool) (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool)).

11. Test for excessive fuel in the crankcase due to leaking injectors.

12. Test the ignition system for improper operation. Refer to Electronic Ignition System Diagnosis (See: Powertrain Management/Computers

and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Electronic Ignition System Diagnosis).

13. Test the engine for any mechanical conditions such as sticking valves, lifters, etc., which could alter the flow into the combustion chamber.

Refer to Symptoms - Engine Mechanical (See: Engine, Cooling and Exhaust/Engine/Testing and Inspection/Symptom Related Diagnostic

Procedures/Symptoms - Engine Mechanical).

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure. Verify the repair under the same

speed and load as noted in the Freeze Frame/Failure Records data recorded during testing.

P0222

DTC P0121-P0123, P0222, P0223, or P2135 (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.

* 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 P0121

- Throttle Position Sensor Performance

DTC P0122

- Throttle Position Sensor 1 Circuit Low Voltage

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 327

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 327

* 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 scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the steering wheel controls switch - left.

2. Ignition ON, verify that a test lamp illuminates between the signal circuit terminal 9 and B+.

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

replace the BCM.

3. If all circuits test normal, test or replace the steering wheel controls switch - left.

Repair Instructions

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

* Steering Wheel Control Switch Assembly Replacement (See: Accessories and Optional Equipment/Sensors and Switches - Accessories and

Optional Equipment/Steering Mounted Controls Assembly/Service and Repair)

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

B0958

DTC B0958, B0959, B0960, or B0961

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using the 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 B0958 01

- Parking Aid Rear Sensor 1 Circuit Short to Battery

DTC B0958 06

- Parking Aid Rear Sensor 1 Circuit Short to Ground or Open

DTC B0958 08

- Parking Aid Rear Sensor 1 Circuit Signal Invalid

DTC B0958 21

- Parking Aid Rear Sensor 1 Circuit Incorrect Period

DTC B0958 3A

- Parking Aid Rear Sensor 1 Circuit Incorrect Component Installed

DTC B0959 01

- Parking Aid Rear Sensor 2 Circuit Short to Battery

DTC B0959 06

- Parking Aid Rear Sensor 2 Circuit Short to Ground or Open

DTC B0959 08

- Parking Aid Rear Sensor 2 Circuit Signal Invalid

DTC B0959 21

- Parking Aid Rear Sensor 2 Circuit Incorrect Period

2010 Cadillac Truck Escalade RWD V8-6.2L Page 2777

2010 Cadillac Truck Escalade RWD V8-6.2L Page 2777

* 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 scan tool information

Circuit/System Verification

Verify that DTC U1814, U2099, B1428, B1370, B1380, B1440, or B1441 is not set.

If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic

Trouble Code (DTC) List - Vehicle).

Circuit/System Testing

Note: Use the schematic to identify the following:

* Control modules the vehicle is equipped with

* Control module locations on the low and high speed GMLAN serial data circuits

* The control modules B+, ignition, ground, communication enable and serial data circuit terminals

1. Determine the control module that is not communicating. Refer to Control Module U Code List (See: Diagnostic Trouble Code

Descriptions/Control Module U Code List).

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

3. Test for less than 10 ohm between each ground circuit terminal and ground.

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

4. If equipped, verify that a test lamp illuminates between each B+ circuit terminal and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit fuse is open, test the

control circuits of the control module for a short to ground. If the circuits test normal, replace the control module.

5. If equipped, ignition ON, verify that a test lamp illuminates between each ignition circuit terminal 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 fuse is open, test

the control circuits of the control module for a short to ground. If the circuits test normal, replace the control module.

Note: Only the high speed GMLAN modules have a serial data communication enable circuit OR an accessory wakeup serial data circuit,

and the BCM is the output for these circuits. Refer to the control module schematics to identify which control modules have these circuits.

6. If equipped, ignition ON, verify that a test lamp illuminates between the communication enable circuit terminal OR the accessory wakeup

circuit terminal and ground.

瀚慖f the test lamp does not illuminate, test the circuit for an open/high resistance. If the circuits test normal, replace the BCM.

7. Ignition OFF for 60 seconds, test for less than 5 ohm between the serial data circuit terminals and the appropriate DLC terminal listed below:

* Class 2 serial data circuit terminal 2

* Low speed GMLAN serial data terminal 1

* High speed GMLAN serial data terminal 6 or 14

瀚慖f greater than the specified range, test the serial data circuit for an open/high resistance between the non communicating control module

and a control module setting the DTC or a serial data splice pack.

8. If all circuits test normal, replace the control module that is not communicating.

Repair Instructions

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

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

Procedures/Wiring Repairs/GMLAN Wiring Repairs)

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

2010 Cadillac Truck SRX AWD V6-3.0L Page 486

2010 Cadillac Truck SRX AWD V6-3.0L Page 486

* 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 scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool Seat Memory Control Module seat switch parameters listed below while pressing and releasing the appropriate

seat directional switch. The readings should change between Inactive and Forward/Rearward or UP/Down.

* Driver Seat Cushion Front Vertical Switch

* Driver Seat Cushion Rear Vertical Switch

* Driver Seat Horizontal Switch

* Driver Seat Back Switch

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the S64D driver seat adjuster switch.

2. Verify that all scan tool driver seat switch parameters listed below are Inactive:

* Driver Seat Cushion Front Vertical Switch

* Driver Seat Cushion Rear Vertical Switch

* Driver Seat Horizontal Switch

* Driver Seat Back Switch

瀚慖f not the specified value, test the appropriate signal circuit listed below for a short to ground. If the circuit tests normal, replace the K40

seat memory control module.

* Front vertical upward switch terminal A

* Front vertical downward switch terminal K

* Rear vertical upward switch terminal F

* Rear vertical downward switch terminal J

* Horizontal forward switch terminal D

* Horizontal rearward switch terminal C

* Recline forward switch terminal H

* Recline rearward switch terminal G

3. If all circuits test normal, test or replace the S64D driver seat adjuster switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the S64D driver seat adjuster switch.

2. Test for infinite resistance between the ground terminal E and each seat direction signal terminal with the switch in the open position.

瀚慖f not the specified value, replace the S64D driver seat adjuster switch.

3. Test for less than 2 Ohms between the ground terminal E and each signal terminal with the appropriate switch in the closed position.

瀚慖f greater than the specified value, replace the S64D driver seat adjuster switch.

Repair Instructions

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

* Driver Seat Adjuster Switch Replacement (See: Body and Frame/Seats/Power Seat Switch/Service and Repair/Driver Seat Adjuster Switch

Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for seat memory control module replacement, setup,

and programming

B1740

DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820

Diagnostic Instructions