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 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.

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 817

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 817

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.

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 754

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 754

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 EXT AWD V8-6.2L Page 730

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 730

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 EXT AWD V8-6.2L Page 695

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 695

Control Module References (See: Testing and Inspection/Programming and Relearning) for Scan Tool Information

Circuit/System Verification

Ignition ON,observe the scan tool Tilt Up Switch parameter and Tilt Down Switch parameter while cycling the switch between states.The reading

should be Inactive and change to Active when pushing the appropriate switch.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the tilt switch.

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

3. Verify the scan tool tilt switch parameter is Inactive.

瀚慖f not the specified value, test the control circuit listed below for a short to voltage. If the circuit tests normal, replace the MSM.

* Tilt Up Switch terminal C

* Tilt Down Switch terminal A

4. Install a 3A fused jumper wire between the control circuits listed below and the B+ circuit terminal. Verify the scan tool tilt switch parameter

is Active.

* Tilt Up Switch terminal C

* Tilt Down Switch terminal A

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

replace the MSM.

5. If all circuit test normal, test or replace the tilt switch.

Component Testing

Tilt Switch

1. Ignition OFF, disconnect the harness connector at the tilt switch.

2. Test for infinite resistance between the control terminals A and C with the switch in the neutral position.

瀚慖f less than the specified range, replace the tilt switch.

3. Test for less than 1 ohm between the control terminals listed below and the B+ terminal B with the switch in each appropriate position.

* Tilt Up Switch terminal C

* Tilt Down Switch terminal A

瀚慖f greater than the specified value, replace the tilt switch.

Repair Instructions

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

* Steering Column Tilt Wheel Switch Replacement (See: Sensors and Switches/Sensors and Switches - Steering and Suspension/Sensors and

Switches - Steering/Tilt Wheel Switch/Service and Repair)

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

B2855

DTC B2850, B2855, B2870, or B2875

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 EXT AWD V8-6.2L Page 658

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 658

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

Circuit/System Testing

1. Ignition OFF, disconnect the fog lamp relay.

2. Ignition ON, verify that a test lamp does not illuminate between the control circuit terminal 87 and ground.

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

3. Verify that a test lamp illuminates between the B+ circuit terminal 30 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 tests normal and the

B+ circuit fuse is open, test the control circuit terminal 87 for a short to ground. If the circuit tests normal, test or replace the fog lamp

relay.

4. Verify that a test lamp illuminates between the B+ circuit terminal 85 and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for an open/high resistance.

5. Disconnect the harness connector at the appropriate fog lamp front.

6. Test for less than 5 ohm between the fog lamp front ground circuit terminal B and ground

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

7. Connect the harness connector at the fog lamp front.

8. Connect a 15 A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87. Verify the fog lamp front is

activated.

瀚慖f the fog lamp front does not activate and the circuit fuse is good, test the control circuit for an open/high resistance. If the circuit tests

normal, test or replace the fog lamp front.

瀚慖f the fog lamp front does not activate and the circuit fuse is open, test the control circuit for a short to ground. If the circuit tests normal,

test or replace the fog lamp front.

9. Connect a test lamp between the B+ circuit terminal 85 and the control circuit terminal 86.

10. Command the Fog Lamps ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded

states.

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

the BCM.

11. If all circuits test normal, test or replace the fog lamp relay.

Repair Instructions

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

* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay

Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power

Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))

* Front Fog Lamp Replacement (Tahoe, Avalanche) (See: Lighting and Horns/Fog/Driving Lamp/Service and Repair/Removal and

Replacement/Front Fog Lamp Replacement (Tahoe, Avalanche))Front Fog Lamp Replacement (Yukon) (See: Lighting and

Horns/Fog/Driving Lamp/Service and Repair/Removal and Replacement/Front Fog Lamp Replacement (Yukon))Front Fog Lamp

Replacement (PLATINUM) (See: Lighting and Horns/Fog/Driving Lamp/Service and Repair/Removal and Replacement/Front Fog Lamp

Replacement (Platinum))

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

B2540

DTC B2540

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 242

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 242

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 appropriate microphone.

2. Ignition ON Radio ON, test for 0.47-2.75 V between the microphone (-) signal circuit terminal A and ground.

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

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

amplifier.

3. Test for 5.75-8.03 V between the microphone (+) signal circuit terminal B and ground.

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

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

amplifier.

4. If all circuits test normal, replace the appropriate microphone.

Repair Instructions

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

* Radio Volume Compensator Interior Noise Microphone Replacement (Floor Console) (See: Accessories and Optional Equipment/Radio,

Stereo, and Compact Disc/Automatic Volume Control/Service and Repair/Radio Volume Compensator Interior Noise Microphone

Replacement (Floor Console))Radio Volume Compensator Interior Noise Microphone Replacement (Headliner) (See: Accessories and

Optional Equipment/Radio, Stereo, and Compact Disc/Automatic Volume Control/Service and Repair/Radio Volume Compensator Interior

Noise Microphone Replacement (Headliner))

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

B127D

DTC B1277, B127C, or B127D

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) provide an overview of each diagnostic category.

DTC Descriptors

DTC B1277 01

- Microphone 1 (LF) Input Signal Circuit Short to Battery

DTC B1277 02

- Microphone 1 (LF) Input Signal Circuit Short to Ground

DTC B1277 04

- Microphone 1 (LF) Input Signal Circuit Open

DTC B1277 1A

- Microphone 1 (LF) Input Signal Circuit Bias Level Out of Range

DTC B127C 01

- Microphone 2 (RF) Input Signal Circuit Short to Battery

DTC B127C 02

- Microphone 2 (RF) Input Signal Circuit Short to Ground

DTC B127C 04

- Microphone 2 (RF) Input Signal Circuit Open

DTC B127C 1A

- Microphone 2 (RF) Input Signal Circuit Bias Level Out of Range

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1418

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1418

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

Special Tools

* EL-48571 High Voltage Battery Pin Out Box

* EL-48900 HEV Safety Kit

Circuit/System Verification

Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5

V of each other.

Circuit/System Testing

Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.

Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks:

* Identify how to disable high voltage.

* Identify how to test for the presence of high voltage.

* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures

must be followed.

Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:

* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.

* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.

- Visually and functionally inspect the gloves before use.

- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or

not.

Failure to follow the procedures exactly as written may result in serious injury or death.

1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().

2. Disconnect the X4 harness connector at the drive motor battery control module.

3. Connect to the EL-48571 high voltage battery pin out box.

4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.

5. Each battery voltage reading should be between 10-19 V.

瀚慖f not within the specified range, replace the drive motor battery assembly.

6. Each battery voltage reading should be within 1.5 V of each other.

瀚慖f not within the specified range, replace the drive motor battery assembly.

7. If all circuits test normal, replace the drive motor battery control module.

Repair Instructions

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

* Drive Motor Generator Battery Replacement and Shipping Preparation ()

* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module

replacement, setup and programming

P0B56

DTC P0B3D, P0B42, P0B47, P0B4C, P0B51, P0B56, P0B5B, P0B60, P0B65, P0B6A, P0B6F, P0B74, P0B79, P0B7E, P0B83, P0B88, P0B8D,

P0B92, P0B97, or P0B9C

Diagnostic Instructions

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

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1357

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1357

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

Special Tools

* EL-48571 High Voltage Battery Pin Out Box

* EL-48900 HEV Safety Kit

Circuit/System Verification

Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5

V of each other.

Circuit/System Testing

Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.

Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks:

* Identify how to disable high voltage.

* Identify how to test for the presence of high voltage.

* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures

must be followed.

Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:

* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.

* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.

- Visually and functionally inspect the gloves before use.

- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or

not.

Failure to follow the procedures exactly as written may result in serious injury or death.

1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().

2. Disconnect the X4 harness connector at the drive motor battery control module.

3. Connect to the EL-48571 high voltage battery pin out box.

4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.

5. Each battery voltage reading should be between 10-19 V.

瀚慖f not within the specified range, replace the drive motor battery assembly.

6. Each battery voltage reading should be within 1.5 V of each other.

瀚慖f not within the specified range, replace the drive motor battery assembly.

7. If all circuits test normal, replace the drive motor battery control module.

Repair Instructions

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

* Drive Motor Generator Battery Replacement and Shipping Preparation ()

* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module

replacement, setup and programming

P0B6F

DTC P0B3D, P0B42, P0B47, P0B4C, P0B51, P0B56, P0B5B, P0B60, P0B65, P0B6A, P0B6F, P0B74, P0B79, P0B7E, P0B83, P0B88, P0B8D,

P0B92, P0B97, or P0B9C

Diagnostic Instructions

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

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1034

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1034

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

Circuit/System Verification

1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and

15.0 volts.

瀚慖f not within the specified range, refer to Charging System Test (See: Starting and Charging/Testing and Inspection/Component Tests

and General Diagnostics/Charging System Test).

2. Observe the scan tool ESC Battery Voltage Signal parameter. The reading should be between 12.6 and 15.0 volts.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the ESC module.

2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the ground

circuit terminal 47 and ground.

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

3. Verify that a test lamp illuminates between the B+ circuit terminal 32 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.

4. If all circuits test normal, replace the ESC 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 ESC module replacement, setup and programming.

ESC

DTC C0895 (ESC)

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 C0895 00

- Device Voltage - Electronic Suspension Control Module 12V

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1873

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1873

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.

锟斤拷If 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.

锟斤拷If 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.

锟斤拷If 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.

锟斤拷If 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.

锟斤拷If 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.

锟斤拷If 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.

锟斤拷If 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.

锟斤拷If 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.

锟斤拷If 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 AWD V8-6.2L Page 1716

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1716

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.

锟斤拷If 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.

锟斤拷If 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 Escalade EXT AWD V8-6.2L Page 3112

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 3112

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 AWD V8-6.2L Page 1418

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1418

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

Special Tools

* EL-48571 High Voltage Battery Pin Out Box

* EL-48900 HEV Safety Kit

Circuit/System Verification

Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5

V of each other.

Circuit/System Testing

Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.

Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks:

* Identify how to disable high voltage.

* Identify how to test for the presence of high voltage.

* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures

must be followed.

Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:

* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.

* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.

- Visually and functionally inspect the gloves before use.

- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or

not.

Failure to follow the procedures exactly as written may result in serious injury or death.

1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().

2. Disconnect the X4 harness connector at the drive motor battery control module.

3. Connect to the EL-48571 high voltage battery pin out box.

4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.

5. Each battery voltage reading should be between 10-19 V.

锟斤拷If not within the specified range, replace the drive motor battery assembly.

6. Each battery voltage reading should be within 1.5 V of each other.

锟斤拷If not within the specified range, replace the drive motor battery assembly.

7. If all circuits test normal, replace the drive motor battery control module.

Repair Instructions

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

* Drive Motor Generator Battery Replacement and Shipping Preparation ()

* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module

replacement, setup and programming

P0B56

DTC P0B3D, P0B42, P0B47, P0B4C, P0B51, P0B56, P0B5B, P0B60, P0B65, P0B6A, P0B6F, P0B74, P0B79, P0B7E, P0B83, P0B88, P0B8D,

P0B92, P0B97, or P0B9C

Diagnostic Instructions

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

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1357

2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1357

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

Special Tools

* EL-48571 High Voltage Battery Pin Out Box

* EL-48900 HEV Safety Kit

Circuit/System Verification

Ignition ON, observe the scan tool Hybrid Battery 1-20 parameters. Each reading should be between 10-19 V, and all readings should be within 1.5

V of each other.

Circuit/System Testing

Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.

Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks:

* Identify how to disable high voltage.

* Identify how to test for the presence of high voltage.

* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures

must be followed.

Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:

* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.

* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.

- Visually and functionally inspect the gloves before use.

- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or

not.

Failure to follow the procedures exactly as written may result in serious injury or death.

1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().

2. Disconnect the X4 harness connector at the drive motor battery control module.

3. Connect to the EL-48571 high voltage battery pin out box.

4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.

5. Each battery voltage reading should be between 10-19 V.

锟斤拷If not within the specified range, replace the drive motor battery assembly.

6. Each battery voltage reading should be within 1.5 V of each other.

锟斤拷If not within the specified range, replace the drive motor battery assembly.

7. If all circuits test normal, replace the drive motor battery control module.

Repair Instructions

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

* Drive Motor Generator Battery Replacement and Shipping Preparation ()

* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module

replacement, setup and programming

P0B6F

DTC P0B3D, P0B42, P0B47, P0B4C, P0B51, P0B56, P0B5B, P0B60, P0B65, P0B6A, P0B6F, P0B74, P0B79, P0B7E, P0B83, P0B88, P0B8D,

P0B92, P0B97, or P0B9C

Diagnostic Instructions

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