2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2997

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2997

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

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector of the yaw rate sensor.

2. Ignition ON, verify that a test lamp illuminates between the module voltage circuit 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, replace the

EBCM.

3. Ignition OFF, test for less than 5 ohms between the module ground circuits and ground.

瀚慖f greater than the specified value, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.

4. If all circuits test normal, replace the yaw rate sensor.

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)

* ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and

Operation/ABS Description and Operation) for the ABS - Hybrid

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Less than 3900 kg

(8600 lb) GVW

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Greater than/Equal to

3900 kg (8600 lb) GVW

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

U2159

DTC U2105-U2199

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 U2142 00

- Lost Communication With Yaw Rate Sensor (YRS)

Circuit/System Description

Modules connected to the CAN bus serial data circuits monitor for serial data communications during normal vehicle operation. Operating

information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be

exchanged on the serial data circuits. The messages are supervised and also, some periodic messages are used by the receiver module as an

availability indication of the transmitter module. Each message contains the identification number of the transmitter module.

The electronic brake control module (EBCM) activates the other modules connected to the CAN serial data circuits by applying voltage when the

ignition key is in ACC, ON or START. The EBCM, Yaw Rate and Lateral Acceleration Sensor are the only modules connected to the CAN bus

serial data circuits. For more information on CAN bus serial data refer to Data Link Communications Description and Operation (See: Powertrain

Management/Computers and Control Systems/Information Bus/Description and Operation).

Conditions for Running the DTC

* The system voltage is between 9-16 volts.

* The vehicle power mode master requires serial data communication to occur.

Conditions for Setting the DTC

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2940

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2940

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

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector of the yaw rate sensor.

2. Ignition ON, verify that a test lamp illuminates between the module voltage circuit 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, replace the

EBCM.

3. Ignition OFF, test for less than 5 ohms between the module ground circuits and ground.

瀚慖f greater than the specified value, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.

4. If all circuits test normal, replace the yaw rate sensor.

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)

* ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and

Operation/ABS Description and Operation) for the ABS - Hybrid

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Less than 3900 kg

(8600 lb) GVW

* Vehicle Yaw Sensor with Vehicle Lateral Accelerometer Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction

Control Systems/Yaw Rate Sensor/Service and Repair/Less than 3900 kg (8600 lb) GVW) for the ABS - Non-Hybrid Greater than/Equal to

3900 kg (8600 lb) GVW

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

U2131

DTC U2105-U2199

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 U2142 00

- Lost Communication With Yaw Rate Sensor (YRS)

Circuit/System Description

Modules connected to the CAN bus serial data circuits monitor for serial data communications during normal vehicle operation. Operating

information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be

exchanged on the serial data circuits. The messages are supervised and also, some periodic messages are used by the receiver module as an

availability indication of the transmitter module. Each message contains the identification number of the transmitter module.

The electronic brake control module (EBCM) activates the other modules connected to the CAN serial data circuits by applying voltage when the

ignition key is in ACC, ON or START. The EBCM, Yaw Rate and Lateral Acceleration Sensor are the only modules connected to the CAN bus

serial data circuits. For more information on CAN bus serial data refer to Data Link Communications Description and Operation (See: Powertrain

Management/Computers and Control Systems/Information Bus/Description and Operation).

Conditions for Running the DTC

* The system voltage is between 9-16 volts.

* The vehicle power mode master requires serial data communication to occur.

Conditions for Setting the DTC

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2507

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2507

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

Circuit/System Verification

Note: A low battery voltage or charging system condition may cause a DTC to set.

1. Ignition ON, observe the DTC information with a scan tool. DTC P0120, P0122, P0123, P0220, P0222, P0223, P0562, P0621, P0622, or

P2135 should not set.

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

Code (DTC) List - Vehicle) for further diagnosis.

2. Clear the DTCs with a scan tool. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power

down.

3. Ignition ON, observe the scan tool TAC Motor parameter. The reading should display Enabled.

4. Observe the DTC information with a scan tool. DTC P1516, P2101, P2119, or P2176 should not set.

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.

* If there is a condition with the throttle body, the TAC Motor Command parameter will go to 99 % for a predetermined amount of time

and then a DTC sets. Once a DTC is set, the TAC Motor Command parameter will go to 0 % and the TAC Motor parameter will display

Disabled.

5. Perform the Throttle Sweep Test while observing the TAC Motor parameter with a scan tool. The TAC Motor parameter should display

Enabled while the Throttle Sweep Test is in progress.

Note: Before replacing the throttle body assembly, make sure the throttle control circuits are not shorted to B+.

瀚慖f not the specified value, replace the throttle body assembly.

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

Warning

Turn OFF the ignition before inserting fingers into the throttle bore. Unexpected movement of the throttle blade could cause personal injury.

1. Ignition OFF, verify the following conditions do not exist with the throttle body assembly:

* A throttle blade that is not in the rest position

* A throttle blade that is binding open or closed

* A throttle blade that is free to move open or closed without spring pressure

瀚慖f a condition is found, replace the throttle body assembly.

Note: Disconnecting the throttle body harness connector may cause additional DTCs to set.

2. Ignition OFF, disconnect the harness connector at the throttle body assembly.

3. Ignition ON, verify that a test lamp does not illuminate between each control circuit listed below and ground.

* TAC Motor Control Closed circuit terminal A

* TAC Motor Control Open circuit terminal B

瀚慖f test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM.

4. Ignition ON, verify that a test lamp does not illuminate between each control circuit listed below and B+.

* TAC Motor Control Closed circuit terminal A

* TAC Motor Control Open circuit terminal B

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

5. Ignition OFF, set the DMM to the 40 V scale, select the Min/Max Recording Mode, and set the Peak Min/Max response time to 1 ms.

Note:

* The DMM Min/Max Recording Mode and the response time of 1 ms must be reset after testing each circuit or a lower voltage will be

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2142

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2142

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 stop lamp switch.

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

瀚慖f less than the specified value, test the B+ circuit for a short to ground or an open/high resistance.

3. Verify the BPP Circuit Signal data parameter displays released.

瀚慖f not the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.

4. Connect a 3A fused jumper between the B+ circuit terminal B and the signal circuit terminal A. Verify the BPP Circuit Signal data parameter

displays applied.

瀚慖f not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the

ECM.

5. If all circuits test normal, test or replace the stop lamp switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the stop lamp switch.

2. With the brake pedal released, test for infinite resistance between terminal A and terminal B at the stop lamp switch.

瀚慖f not the specified value, replace the stop lamp switch.

3. With the brake pedal released, test for less than 1.0 ohm between terminal C and terminal D at the stop lamp switch.

瀚慖f not the specified value, replace the stop lamp switch.

4. With the brake pedal applied, test for less than 1.0 ohm between terminal A and terminal B at the stop lamp switch.

瀚慖f not the specified value, replace the stop lamp switch.

5. With the brake pedal applied, test for infinite resistance between terminal C and terminal D at the stop lamp switch.

瀚慖f not the specified value, replace the stop lamp switch.

Repair Instructions

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

* Stop Lamp Switch Replacement (With Adjustable Pedals) (See: Lighting and Horns/Brake Light Switch/Service and Repair/Stop Lamp

Switch Replacement (With Adjustable Pedals))Stop Lamp Switch Replacement (Without Adjustable Pedals) (See: Lighting and

Horns/Brake Light Switch/Service and Repair/Stop Lamp Switch Replacement (Without Adjustable Pedals))

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

P0573

DTC P0572 or P0573

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 P0572

- Brake Switch Circuit 1 Low Voltage

DTC P0573

- Brake Switch Circuit 1 High Voltage

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2036

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2036

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

Special Tools

J 35616-A/BT-8637 Connector Test Adapter Kit

Circuit/System Verification

1. Ignition OFF, inspect the engine wiring harness carrying the camshaft position sensor circuits for the following conditions:

* Close routing of aftermarket electrical equipment

* Close to solenoids, motors, and relays

瀚慖f any of these are determined to be a possible source of electrical interference, correct any wire harness routing or component placement

conditions.

2. Engine idling, observe the scan tool Camshaft Position Active Counter parameter. Parameter should be incrementing.

3. Engine idling, observe the DTC information with a scan tool. DTC P0341 or P0366 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

1. Ignition OFF, inspect the camshaft position sensor for looseness and correct installation.

瀚慖f the camshaft position sensor is loose, inspect the sensor and the O-ring for damage, and replace as necessary.

2. Inspect the engine for the following conditions:

* Engine oil for debris

* Camshaft reluctor wheel for damage

* The timing chain, timing chain tensioner, and sprockets for wear or damage

瀚慖f debris is found in the engine oil, inspect the internal engine components to determine the cause. Repair or replace any worn or damaged

components.

Component Testing

Important: You must perform the Circuit/System Testing before proceeding with Component Testing.

1. Inspect the camshaft position sensor for correct installation. Remove the camshaft position sensor from the engine and inspect the sensor

O-ring for damage.

瀚慖f the sensor is loose, incorrectly installed, or damaged, replace the camshaft position sensor.

2. Connect the camshaft position sensor harness connector to the camshaft position sensor.

3. Ignition ON, engine OFF, observe the Camshaft Position Active Counter parameter on the scan tool.

4. Pass a flat steel object across the tip of the sensor repeatedly. The Camshaft Position Active Counter parameter should increment with each

pass of the steel object.

瀚慖f the parameter does not increment, replace the camshaft position sensor.

Repair Instructions

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

* Camshaft Position Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Camshaft Position Sensor/Service

and Repair)

* Engine Control Module Programming and Setup (See: Powertrain Management/Computers and Control Systems/Engine Control

Module/Testing and Inspection)

* Engine Control Module Replacement (See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and

Repair)

P0351

DTC P0351-P0358

Diagnostic Instructions

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1772

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1772

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.

* Throttle Body Assembly Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Throttle Body/Service and

Repair/Removal and Replacement)

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

programming, and setup

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1615

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1615

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/2ML70 - Automatic Transmission/Transmission Fluid Level and Condition Check)

to verify correct fluid level.

2. Perform the Line Pressure Check (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component

Tests and General Diagnostics/2ML70 - Automatic Transmission/Line Pressure Check) to verify correct oil pressure.

3. 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/2ML70 - Automatic Transmission/Control

Solenoid Valve and Transmission Control Module Assembly Inspection) to verify control solenoid valve assembly condition.

4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test (See: Transmission and

Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/2ML70 - Automatic

Transmission/Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test) to verify control solenoid

valve assembly performance.

5. Inspect the hybrid low, 1-2 clutch boost valve assembly for sticking or damage.

瀚慖f you found a concern with the hybrid low, 1-2 clutch regulator valve, repair or replace the valve or valve body.

6. Inspect the hybrid low, 1-2 clutch for a stuck On or damaged condition.

瀚慖f you found a hybrid low, 1-2 clutch concern, repair or replace the hybrid low, 1-2 clutch assembly as necessary.

Repair Instructions

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

* Control Valve Assembly Disassemble (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and

Repair/Overhaul/2ML70 - Automatic Transmission/54. Control Valve Assembly Disassemble) for valve body inspection procedures.

* Control Valve Upper Body Replacement (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and

Repair/2ML70 - Automatic Transmission) for control valve body replacement.

* Hybrid Low, 1-2 Clutch Piston Removal (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and

Repair/Overhaul/2ML70 - Automatic Transmission/24. Hybrid Low, 1-2 Clutch Piston Removal) for hybrid low, 1-2 clutch assembly

inspection.

* Hybrid Low, 1-2 Clutch Piston Installation (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and

Repair/Overhaul/2ML70 - Automatic Transmission/31. Hybrid Low, 1-2 Clutch Piston Installation) for low and for hybrid low, 1-2 clutch

assembly replacement.

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

setup, and programming.

P07A5

DTC P07A5

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 P07A5

- Transmission Clutch 2 Stuck On

Circuit/System Description

The hybrid powertrain control module monitors the Clutch Slip parameters for each Hybrid Trans. Mode Commanded state. This DTC detects no

clutch slip when the hybrid direct, 2-3-4 clutch is commanded OFF, indicating a stuck or welded clutch condition.

Conditions for Running the DTC

* Hybrid direct, 2-3-4 clutch is the primary off-going clutch.

* The Calc. Trans Input Speed is greater than 250 RPM.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1483

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1483

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

Circuit/System Verification

Engine running, observe the scan tool Generator F-Terminal Signal Circuit parameter. The Generator F-Terminal Signal Circuit parameter should

display between 5-99%.

Circuit/System Testing

1. Verify that a test lamp illuminates between the G13 Generator B+ terminal A X1 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.

2. Ignition OFF, disconnect the X2 harness connector at the G13 Generator.

3. Ignition ON, verify the scan tool Generator F-Terminal Signal parameter displays less than 5%.

瀚慖f greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the K20

Engine Control Module.

4. Install a 3 A fused jumper wire between B+ and the signal circuit terminal 2.

5. Verify the scan tool Generator F-Terminal Signal parameter displays greater than 95%.

瀚慖f less than the specified range, test the signal circuit terminal 2 for a short to ground or an open/high resistance. If the circuit tests

normal, replace the K20 Engine Control Module.

6. If the circuit tests normal replace the G13 Generator.

Repair Instructions

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

* Generator Replacement (LF1) (See: Starting and Charging/Charging System/Alternator/Service and Repair)Generator Replacement (LAU)

(See: Starting and Charging/Charging System/Alternator/Service and Repair)

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

P0626

DTC P0625 or P0626

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 P0625

- Generator F-Terminal Circuit Low Voltage

DTC P0626

- Generator F-Terminal Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The engine control module (ECM) uses the generator field duty cycle signal circuit, or F-terminal circuit, to monitor the duty cycle of the generator.

The generator field duty cycle signal circuit connects to high side of the field windings in the generator. A pulse width modulated (PWM) high side

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1120

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1120

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 P0602, P0603, P0604, P0605, P0606, P0610, P0614, P0630, P06D1, P160D, P160E,

P161C, or P2610 should not set.

2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

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

Circuit/System Testing

1. Ignition ON, clear the DTC information with a scan tool. Observe the scan tool DTC information.

瀚慖f DTC P0602, P0610, P0614, P0630, P160D, P160E, or P161C failed this ignition, reprogram the K20 ECM. Refer to Control Module

References (See: Testing and Inspection/Programming and Relearning). If the DTC resets, replace the K20 ECM.

2. Observe the DTC information with a scan tool. Verify DTC P0603, P0604, P0605, P0606, P06D1, or P2610 does not set.

瀚慖f a DTC failed this ignition, replace the K20 ECM.

Repair Instructions

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

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

programming

P160E

DTC P0602-P0606, P0610, P0614, P0630, P06D1, P160D, P160E, P161C, or P2610 (ECM, LAU/LBW)

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 P0602

- Control Module Not Programmed

DTC P0603

- Control Module Long Term Memory Reset

DTC P0604

- Control Module Random Access Memory Performance

DTC P0605

- Control Module Programming Read Only Memory Performance

DTC P0606

- Control Module Processor Performance

DTC P0610

- Control Module Vehicle Options Incorrect

DTC P0614

- Engine Control Module/Transmission Control Module Programming Not Plausible

DTC P0630

- VIN Not Programmed or Mismatched - Engine Control Module (ECM)

DTC P06D1

- Control Module Ignition Coil System Circuitry Performance

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1490

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1490

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

Circuit/System Verification

1. Attempt to start the engine. Observe the DTC information with a scan tool. DTC P0627, P0628, or P0629 should not set.

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

parameters:

* Fuel Pump Enable Circuit Low Voltage Test Status

* Fuel Pump Enable Circuit Open Test Status

* Fuel Pump Enable Circuit High Voltage Test Status

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

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 K27 fuel pump control module harness connector.

2. Connect a test lamp between the enable circuit terminal 20 of the fuel pump control module and ground.

3. Ignition ON, command the ECM Fuel Pump Enable ON and OFF with a scan tool. The test lamp should turn ON and OFF as commanded.

瀚慖f the test lamp remains OFF all the time, test for a short to ground or an open/high resistance on the enable circuit. If circuit/connections

test normal, replace the K20 ECM.

瀚慖f the test lamp remains ON all the time, test for a short to voltage on the enable circuit. If circuit/connections test normal, replace the K20

ECM.

4. Ignition ON, test for 2-3 V on the enable circuit terminal 20 of the fuel pump control module.

瀚慖f not within the specified range, replace the K20 ECM.

5. If all circuits/connections test normal, replace the K27 fuel pump 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 ECM or fuel pump control module replacement, setup,

and programming

P0630

DTC P0602-P0606, P0610, P0614, P0630, P06D1, P160D, P160E, P161C, or P2610 (ECM, LAU/LBW)

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 P0602

- Control Module Not Programmed

DTC P0603

- Control Module Long Term Memory Reset

DTC P0604

- Control Module Random Access Memory Performance

DTC P0605

- Control Module Programming Read Only Memory Performance

DTC P0606

- Control Module Processor Performance

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 2011

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 2011

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

Circuit/System Verification

1. Ensure the transmission fluid temperature is between 50-80掳C (122-176掳F).

2. Operate the vehicle in 2nd gear long enough to ensure at least a 3掳C (5掳F) rise in transmission fluid temperature, then operate the vehicle in

Park for 5 s.

3. Observe the scan tool data TCC Pressure Control Solenoid Valve Current parameter. The reading should be between 0.1-1.1 A.

Circuit/System Testing

Command the TCC Solenoid Valve increase and decrease with a scan tool. The value should rise from 0.1-1.1 A and return to 0.1 A.

If the value does not change, turn ignition OFF, remove the K71 Transmission Control Module. Connect a test lamp between the low reference

circuit terminal 4 X2 at the K71 Transmission Control Module and the voltage supply component circuit terminal 9 X2 at the K71 Transmission

Control Module. Command the TCC Solenoid Valve increase and decrease with a scan tool. The test lamp has to illuminate brighter with increasing

current.

If the test lamp always illuminates or always does not illuminate, replace the K71 Transmission Control Module.

Component Testing

Static Test

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

2. Test for 5-5.6 ohm at 20掳C (68掳F) between the low reference circuit terminal 4 X2 and the voltage supply circuit terminal 9 X2.

瀚慖f less than the specified range, test the wiring harness for internal short. If the circuit test normal, replace the Q27D Pressure Control

Solenoid Valve 4.

3. Test for infinite resistance between each terminal and the low reference circuit terminal 4 X2 and also to the voltage supply circuit terminal 9

X2.

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

4. If all circuit test normal, perform the control solenoid valve inspection. Refer to Control Solenoid Valve Inspection (M36 and MXE) (See:

Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/AF40-6 -

Automatic Transmission).

瀚慖f the inspection test normal, replace the control valve body.

Repair Instructions

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

* Control valve body replacement-Refer to Control Valve Body Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Valve Body/Service and Repair/AF40-6 - Automatic Transmission/Control Valve Body Replacement) for

replacement, setup, and programming.

* 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).

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

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

6T70/6T75 - Automatic Transmission

DTC P2762, P2763, or P2764

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 SRX AWD V6-2.8L Turbo Page 1958

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1958

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

Circuit/System Verification

1. Ensure the transmission fluid temperature is between 50-80掳C (122-176掳F).

2. Operate the vehicle in 2nd gear long enough to ensure at least a 3掳C (5掳F) rise in transmission fluid temperature, then operate the vehicle in

Park for 5 s.

3. Observe the scan tool Clutch Pressure Control Solenoid Valve 3 Current parameter. The reading should be between 0.1-1.1 A.

Circuit/System Testing

Command the Clutch Pressure Control Solenoid Valve 3 with a scan tool. The value should change from 0.0-1.0 A.

If the value does not change, turn ignition OFF, remove the K71 Transmission Control Module. Connect a test lamp between the low reference

circuit terminal 22 X2 at the K71 Transmission Control Module and the voltage supply component circuit terminal 14 X2 at the K71 Transmission

Control Module. Command the Clutch Pressure Control Solenoid Valve 3 with a scan tool. The test lamp has to illuminate brighter with increasing

current.

If the test lamp always illuminate or always does not illuminate, replace the K71 Transmission Control Module.

Component Testing

Static Test

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

2. Test for 5-5.6 ohm at 20掳C (68掳F) between the low reference circuit terminal 22 X2 and the voltage supply circuit terminal 14 X2.

瀚慖f less than the specified range, test the wiring harness for internal short. If the circuit test normal, replace the Q27C Pressure Control

Solenoid Valve 3.

3. Test for infinite resistance between each terminal and the low reference circuit terminal 22 X2 and also to the voltage supply circuit terminal

14 X2.

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

4. If all circuit test normal, perform the control solenoid valve inspection. Refer to Control Solenoid Valve Inspection (M36 and MXE) (See:

Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/AF40-6 -

Automatic Transmission).

瀚慖f the inspection test normal, replace the control valve body.

Repair Instructions

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

* Control valve body replacement-Refer to Control Valve Body Replacement (See: Transmission and Drivetrain/Automatic

Transmission/Transaxle/Valve Body/Service and Repair/AF40-6 - Automatic Transmission/Control Valve Body Replacement).

* TCM-Refer to Control Module References (See: Testing and Inspection/Programming and Relearning).

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

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

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

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

6T70/6T75 - Automatic Transmission

DTC P2719-P2721

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 P2719

- Clutch Pressure Control (PC) Solenoid 4 System Performance

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 916

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 916

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

Circuit/System Verification

1. Using a scan tool, perform the EBCM, Module Setup, EBCM Relearn.

2. Verify that DTC C012C, C121A, C128C, C128F, C12B9, C12BA, C12BB or C12F7 is not set.

瀚慖f the DTC is set replace brake pressure modulator valve assembly. If the DTC resets, replace the EBCM.

Repair Instructions

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

* Brake Pressure Modulator Valve Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Hydraulic

Control Assembly - Antilock Brakes/Service and Repair)

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

Brake Pedal Position Sensor 3 Plausibility

DTC C0294, C120C, or C12F8

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 C0294 00

- BMC Primary Piston Position Sensor A and B Correlation

DTC C120C

- Brake Pedal Position Sensor 4 Plausibility

DTC C12F8

- Brake Pedal Position Sensor 3 Plausibility

Diagnostic Fault Information

Circuit/System Description

The electronic brake control module (EBCM) uses input from the brake master cylinder piston position sensor and the brake switch to determine

when the brake pedal is being applied and with how much force. These inputs are used to determine the driver's braking intent which is used to the

control amount of pressure applied to the wheels.

Conditions for Running the DTC

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1935

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1935

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.

瀚慖f DTC P2601 is set, refer to the following procedures for further diagnosis:

* After Boil Coolant Pump Always On (See: Engine, Cooling and Exhaust/Cooling System/Testing and Inspection/Symptom Related

Diagnostic Procedures/After Boil Coolant Pump Always On)

* After Boil Coolant Pump Inoperative (See: Engine, Cooling and Exhaust/Cooling System/Testing and Inspection/Symptom Related

Diagnostic Procedures/After Boil Coolant Pump Inoperative)

* After Boil Coolant Pump Malfunction (See: Engine, Cooling and Exhaust/Cooling System/Testing and Inspection/Symptom Related

Diagnostic Procedures/After Boil Coolant Pump Malfunction)

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

Caution: Use the connector test adapter kit J 35616-A for any test that requires probing the following items:

* The control module harness connectors

* The electrical center fuse/relay cavities

* The component terminals

* The component harness connector

Using this kit will prevent damage caused by the improper probing of connector terminals.

Note: Refer to Diagnostic Aids before performing the Circuit/System Testing.

1. Ignition OFF, disconnect harness connector X2 at the K20 ECM.

2. Connect a test lamp between terminal X2-45 and ground.

Note:

* A DMM connected between the test lamp probe and ground will measure 5-6 V if the test lamp illuminates with low intensity. The

voltage will measure near B+ if the test lamp illuminates with bright intensity.

* The values listed above are based on the use of the J-35616-210 test lamp, or a comparable test lamp that has approximately 30 ohm of

internal resistance.

3. Ignition ON, connect a fused jumper wire between the powertrain relay control circuit terminal X2-58 and ground. The test lamp should

illuminate with low intensity.

瀚慖f the test lamp does not illuminate, test the auxiliary coolant pump relay control circuit for a short to ground or an open/high resistance.

If the circuit tests normal, test or replace the X50A underhood fuse block (UBEC).

瀚慖f the test lamp illuminates with bright intensity, test the auxiliary coolant pump relay control circuit for a short to voltage. If the circuit

tests normal, test or replace the X50A UBEC.

4. If all circuits/connections test normal, replace the K20 ECM.

Component Testing

1. Ignition OFF, disconnect and remove the X50A UBEC.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1268

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1268

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

Circuit/System Verification

1. Engine at operating temperature, all accessories OFF. Engine speed greater than 2,000 RPM, observe the appropriate scan tool knock sensor

signal voltage parameter. The voltage should be greater than 4.0 V.

2. Engine idling, move the related harnesses and connectors for the knock sensor circuits while observing the scan tool knock sensor signal

voltage parameters. The voltage should remain steady with no abrupt changes.

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 B68 knock sensor.

Note: If the voltage is not within the specified range on either circuit, test for a wire to wire short, short to ground, or short to voltage

between the knock sensor circuits.

2. Ignition ON, test for 2-3 V between the signal circuit terminal A or 1 and ground.

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

normal, replace the K20 ECM.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuits/connections test normal, replace the K20

ECM.

3. Test for 2-3 V between the low reference circuit terminal B or 2 and ground.

瀚慖f less than the specified range, test the low reference circuit for a short to ground or an open/high resistance. If the circuits/connections

test normal, replace the K20 ECM.

瀚慖f greater than the specified range, test the low reference circuit for a short to voltage. If the circuits/connections test normal, replace the

K20 ECM.

4. If all circuits/connections test normal, test or replace the appropriate B68 knock sensor.

Repair Instructions

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

* Knock Sensor Replacement - Bank 1 (See: Powertrain Management/Computers and Control Systems/Knock Sensor/Service and

Repair/Knock Sensor Replacement - Bank 1)

* Knock Sensor Replacement - Bank 2 (See: Powertrain Management/Computers and Control Systems/Knock Sensor/Service and

Repair/Knock Sensor Replacement - Bank 2)

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

programming.

P0331

DTC P0326, P0327, P0328, P0331, P0332, or P0333 (LAU)

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 P0326

- Knock Sensor System Performance Bank 1

DTC P0327

- Knock Sensor Circuit Low Voltage Bank 1

DTC P0328

- Knock Sensor Circuit High Voltage Bank 1

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 711

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 711

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

Circuit/System Verification

Ignition ON, observe the scan tool BCM SWC Bank 1 Status parameter. The reading should be idle and change between SW1-SW7 when pushing

the appropriate switch.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the right steering wheel control switch.

2. Ignition ON, test for B+ between the voltage reference circuit terminal 3 and ground.

瀚慖f less than the specified value, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests

normal, replace the BCM.

3. Test for B+ between the voltage reference circuit terminal 3 and the signal circuit terminal 4.

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

the BCM.

4. Ignition OFF, disconnect the X1 harness connector at the BCM.

5. Test for infinite resistance between the signal circuit terminal 4 and ground.

瀚慖f less than the specified value, test the signal circuit for a short to ground.

6. If all circuits test normal, test or replace the right steering wheel control switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the right steering wheel control switch.

2. Test the resistance between the voltage reference terminal 3 and the signal terminal 4 while depressing the appropriate steering wheel

controls switch listed below.

瀚慖f not the specified range, replace the steering wheel switch.

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

B3631

DTC B3631

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 RWD V8-6.0L Hybrid Page 687

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 687

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 center high mounted stop lamp.

2. Test for less than 5.0 ohm between the ground circuit terminal B 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 A and the ground circuit terminal B.

4. Ignition ON, turn the stop lamps ON and OFF by applying and releasing the brake pedal. The test lamp should turn ON and OFF when

changing between the selected states.

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

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

the BCM.

5. If all circuits test normal, replace the center high mounted stop lamp.

Repair Instructions

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

* Tail Lamp Bulb Replacement (Yukon) (See: Lighting and Horns/Tail Lamp/Tail Light Bulb/Service and Repair/Tail Lamp Bulb

Replacement (Yukon))Tail Lamp Bulb Replacement (Cadillac) (See: Lighting and Horns/Tail Lamp/Tail Light Bulb/Service and

Repair/Tail Lamp Bulb Replacement (Cadillac))Tail Lamp Bulb Replacement (Tahoe, Avalanche) (See: Lighting and Horns/Tail Lamp/Tail

Light Bulb/Service and Repair/Tail Lamp Bulb Replacement (Tahoe, Avalanche))Tail Lamp Bulb Replacement (Tahoe) (See: Lighting and

Horns/Brake Lamp/Brake Light Bulb/Service and Repair/Tail Lamp Bulb Replacement (Tahoe))Tail Lamp Bulb Replacement (Yukon

Two-mode Hybrid) (See: Lighting and Horns/Brake Lamp/Brake Light Bulb/Service and Repair/Tail Lamp Bulb Replacement (Yukon

Two-mode Hybrid))

* High Mount Stop Lamp Replacement (Yukon Two-mode Hybrid) (See: Lighting and Horns/Center Mounted Brake Lamp/Service and

Repair/High Mount Stop Lamp Replacement (Yukon Two-mode Hybrid))High Mount Stop Lamp Replacement (Yukon) (See: Lighting and

Horns/Center Mounted Brake Lamp/Service and Repair/High Mount Stop Lamp Replacement (Yukon))High Mount Stop Lamp Replacement

(Avalanche) (See: Lighting and Horns/Center Mounted Brake Lamp/Service and Repair/High Mount Stop Lamp Replacement (Avalanche)

)High Mount Stop Lamp Replacement (Escalade) (See: Lighting and Horns/Center Mounted Brake Lamp/Service and Repair/High Mount

Stop Lamp Replacement (Escalade))

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

B3567

DTC B3567

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 B3567 01

- Driver Information Center (DIC) Select Switch Circuit Short To Battery

DTC B3567 59

- Driver Information Center (DIC) Select Switch Circuit/Component Protection Time-Out

Diagnostic Fault Information

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 483

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 483

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 X3 harness connector at the appropriate door module.

2. Ignition ON, verify a test lamp does not illuminate between the following control circuit terminals and ground:

* Control circuit terminal 1

* Control circuit terminal 2

* Control circuit terminal 6

瀚慖f the test lamp illuminates, test the appropriate control circuit for a short to voltage.

3. Ignition OFF, test for infinite resistance between the following control circuits and ground:

* Control circuit terminal 1

* Control circuit terminal 2

* Control circuit terminal 6

瀚慖f less the specified value, test the appropriate control circuit for a short to ground.

4. Test for 40-100 ohms between the control circuit terminal 1 and the control circuit terminal 6.

瀚慖f not within the specified range, test both control circuits for an open/high resistance. If the circuits test normal, test or replace the

rearview mirror.

5. Test for 40-100 ohms between the control circuit terminal 2 and the control circuit terminal 6.

瀚慖f not within the specified range, test both control circuit for an open/high resistance. If the circuits test normal, test or replace the

rearview mirror.

6. If all circuits test normal, replace the door module.

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 or PDM replacement, setup, and

programming

B1640

DTC B1640

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 B1640 01

- Mirror Heater Circuit Short to Battery

DTC B1640 02

- Mirror Heater Circuit Short to Ground

Diagnostic Fault Information

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 897

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 897

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

Special Tools

* EL-49741 - 9 V+ Power Source Harness

* EL-49742 - Battery Voltage B+ and Ground Source Harness

* J 35616 - GM-Approved Terminal Test Kit

Circuit/System Verification

1. Key ON, engine OFF.

2. Connect a scan tool.

3. Parking brake engaged. Transmission in Neutral.

4. Using the Transfer Case Lock function of the Special Function feature of the scan tool, command the transfer case lock ON and OFF. You

should be able to hear the encoder motor lock engage and disengage.

Circuit/System Testing

1. Verify that the TREC fuse, and the Miscellaneous IGN fuse, underhood fuse block, are not open.

瀚慖f the TREC fuse is open, test the battery positive voltage, TCCM harness X3 pin C, for a short to ground.

瀚慖f the Miscellaneous IGN fuse is open, test the Ignition 1 voltage circuit, TCCM harness X2 pin 6, for a short to ground.

2. Ignition ON, engine OFF.

3. Disconnect the X1 harness connector at the transfer case encoder motor (TCEM).

Note: When test probing harness terminals, it is imperative to use the proper test probe from the most current version of the J 35616 - Kit.

Use of an improper test probe may deform the terminal, resulting in intermittent open conditions.

4. Using the PU probes J 35616-4A, test for B+ (+0.0/-1.0 V) between the battery positive voltage circuit, TCEM harness X1 pin B, and a good

ground.

瀚慖f the voltage is less than the specified range, test the affected circuit for an open/high resistance or short to ground condition. If all

circuits and connections test normal, test the TCCM.

5. Using the PU probe J 35616-4A, test for a 4.0-5.0 V diagnostic voltage between the lock solenoid control circuit, TCEM X1 pin C, and a

good ground.

瀚慖f the voltage is greater than the specified range, test the affected circuit for a short to voltage. If all circuits and connections test normal,

test the TCCM.

瀚慖f the voltage is less than the specified range, test the affected circuit for an open/high resistance or short to ground. If all circuits and

connections test normal, test the TCCM.

6. Test the TCEM.

Component Testing

Transfer Case Encoder Motor (TCEM) - Actuator Lock, Motor A and Motor B

1. Remove the encoder motor from transfer case. Using a paint pen or marker, place indexing marks on the encoder motor drive gear and the

mounting surface of the encoder motor.

2. Install EL-49742 - harness.

3. Using a PU probe J-35616-5, attach the red lead from the EL-49742 - jumper harness to the motor control A terminal of the TCEM, pin A.

4. Using a PU probe J-35616-5, touch the black lead from this same jumper harness to the motor control B terminal of the TCEM, pin D. The

encoder motor drive gear should not rotate.

瀚慖f the encoder motor rotates, replace the encoder motor.

5. Using a PU probe J-35616-5, attach the red lead from the EL-49741 - harness to the battery positive voltage terminal of the TCEM harness,

pin B.

6. Using a PU probe J-35616-5, attach the black lead from this same jumper harness to the lock solenoid control terminal of the TCEM harness,

pin C.

7. Attach a 9-volt battery to this harness (not included). You should hear the encoder motor unlock.

瀚慖f you do not hear the TCEM unlock, test the affected circuits of the TCEM harness for an open/high resistance, short to ground or short

together. If all circuits and connections test normal, replace the TCEM.

8. Touch the black lead from EL-49742 - jumper harness to the motor control B terminal of the TCEM, pin D. The encoder motor drive gear

should rotate.

瀚慖f the encoder motor drive gear does not rotate, replace the encoder motor.

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 832

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 832

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

Circuit/System Verification

Observe the scan tool Wheel Speed Sensor parameter. 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 OFF, disconnect the harness connector at the EBCM.

2. Ignition ON, test for less than 1 V between the 12 V reference circuit terminal of the appropriate sensor listed below and ground.

* Left Front Sensor circuit terminal 21

* Right Front Sensor circuit terminal 18

* Left Rear Sensor circuit terminal 33

* Right Rear Sensor circuit terminal 19

瀚慖f greater than the specified range, test the 12 V reference circuit for a short to voltage.

3. Test for less than 1 V between the signal circuit terminal of the appropriate sensor listed below and ground.

* Left Front Sensor circuit terminal 34

* Right Front Sensor circuit terminal 6

* Left Rear Sensor circuit terminal 20

* Right Rear Sensor circuit terminal 31

瀚慖f greater than the specified range, test the signal circuit for a short to voltage.

4. Ignition OFF, test for infinite resistance between the 12 V reference terminal of the appropriate sensor circuit listed below and ground.

* Left Front Sensor circuit terminal 21

* Right Front Sensor circuit terminal 18

* Left Rear Sensor circuit terminal 33

* Right Rear Sensor circuit terminal 19

瀚慖f less than the specified value, test the 12 V reference circuit for a short to ground.

5. Test for infinite resistance between the following signal circuit terminal of the appropriate sensor circuit listed below and ground.

* Left Front Sensor circuit terminal 34

* Right Front Sensor circuit terminal 6

* Left Rear Sensor circuit terminal 20

* Right Rear Sensor circuit terminal 31

瀚慖f less than the specified value, test the signal circuit for a short to ground.

6. Ignition OFF, disconnect the harness connector at the appropriate wheel speed sensor.

7. Test for less than 2 ohm between the appropriate 12 V reference circuit terminals listed below.

* Left Front Sensor circuit terminal 21 at the EBCM harness connector, and terminal 2 at the wheel speed sensor harness connector

* Right Front Sensor circuit terminal 18 at the EBCM harness connector, and terminal 2 at the wheel speed sensor harness connector

* Left Rear Sensor circuit terminal 33 at the EBCM harness connector, and terminal B at the wheel speed sensor harness connector

* Right Rear Sensor circuit terminal 19 at the EBCM harness connector, and terminal B at the wheel speed sensor harness connector

瀚慖f greater than the specified range, test the 12 V reference circuit for an open or high resistance.

8. Test for less than 2 ohm between the appropriate signal circuit terminals listed below.

* Left Front Sensor circuit terminal 34 at the EBCM harness connector, and terminal 1 at the wheel speed sensor harness connector

* Right Front Sensor circuit terminal 6 at the EBCM harness connector, and terminal 1 at the wheel speed sensor harness connector

* Left Rear Sensor circuit terminal 20 at the EBCM harness connector, and terminal A at the wheel speed sensor harness connector

* Right Rear Sensor circuit terminal 31 at the EBCM harness connector, and terminal A at the wheel speed sensor harness connector

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

9. If all circuits test normal, replace the appropriate wheel speed sensor. If the DTC resets replace the EBCM.