2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2494

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2494

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

the ECM.

3. Ignition ON, test for 4.8-5.2 V between the appropriate 5 V reference circuit terminal listed below and ground.

* APP sensor 1 terminal D or 2

* APP sensor 2 terminal C or 1

瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or open/high resistance. If the circuit/connections test

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/connections test normal, replace the

ECM.

4. Observe the scan tool APP sensor 1 voltage parameter. Verify the voltage is less than 0.3 V.

瀚慖f greater than the specified range, test the signal circuit terminal E or 3 for a short to voltage. If the circuit/connections test normal,

replace the ECM.

5. Observe the scan tool APP sensor 2 voltage parameter. Verify the voltage is less than 0.3 V.

瀚慖f greater than the specified range, test the signal circuit terminal B or 6 for a short to voltage. If the circuit/connections test normal,

replace the ECM.

6. Connect a 3 A fused jumper wire between the APP sensor 1 signal circuit terminal E or 3 and the 5 V reference circuit terminal C or 1. Verify

the APP 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/connections test

normal, replace the ECM.

7. Connect a 3 A fused jumper wire between the APP sensor 2 signal circuit terminal B or 6 and the 5 V reference circuit terminal C or 1.

Verify the APP sensor 2 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/connections test

normal, replace the ECM.

8. If all circuits/connections test normal, test or replace the Accelerator Pedal Assembly.

Repair Instructions

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

* Accelerator Pedal Position Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position

Sensor/Service and Repair)

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

programming, and setup

P2128

DTC P2120, P2122, P2123, P2125, P2127, P2128, or P2138

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 P2120

- Accelerator Pedal Position (APP) Sensor 1 Circuit

DTC P2122

- Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

DTC P2123

- Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2487

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2487

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

the ECM.

3. Ignition ON, test for 4.8-5.2 V between the appropriate 5 V reference circuit terminal listed below and ground.

* APP sensor 1 terminal D or 2

* APP sensor 2 terminal C or 1

瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or open/high resistance. If the circuit/connections test

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/connections test normal, replace the

ECM.

4. Observe the scan tool APP sensor 1 voltage parameter. Verify the voltage is less than 0.3 V.

瀚慖f greater than the specified range, test the signal circuit terminal E or 3 for a short to voltage. If the circuit/connections test normal,

replace the ECM.

5. Observe the scan tool APP sensor 2 voltage parameter. Verify the voltage is less than 0.3 V.

瀚慖f greater than the specified range, test the signal circuit terminal B or 6 for a short to voltage. If the circuit/connections test normal,

replace the ECM.

6. Connect a 3 A fused jumper wire between the APP sensor 1 signal circuit terminal E or 3 and the 5 V reference circuit terminal C or 1. Verify

the APP 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/connections test

normal, replace the ECM.

7. Connect a 3 A fused jumper wire between the APP sensor 2 signal circuit terminal B or 6 and the 5 V reference circuit terminal C or 1.

Verify the APP sensor 2 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/connections test

normal, replace the ECM.

8. If all circuits/connections test normal, test or replace the Accelerator Pedal Assembly.

Repair Instructions

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

* Accelerator Pedal Position Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position

Sensor/Service and Repair)

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

programming, and setup

P2125

DTC P2120, P2122, P2123, P2125, P2127, P2128, or P2138

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 P2120

- Accelerator Pedal Position (APP) Sensor 1 Circuit

DTC P2122

- Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

DTC P2123

- Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2480

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2480

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

the ECM.

3. Ignition ON, test for 4.8-5.2 V between the appropriate 5 V reference circuit terminal listed below and ground.

* APP sensor 1 terminal D or 2

* APP sensor 2 terminal C or 1

瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or open/high resistance. If the circuit/connections test

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/connections test normal, replace the

ECM.

4. Observe the scan tool APP sensor 1 voltage parameter. Verify the voltage is less than 0.3 V.

瀚慖f greater than the specified range, test the signal circuit terminal E or 3 for a short to voltage. If the circuit/connections test normal,

replace the ECM.

5. Observe the scan tool APP sensor 2 voltage parameter. Verify the voltage is less than 0.3 V.

瀚慖f greater than the specified range, test the signal circuit terminal B or 6 for a short to voltage. If the circuit/connections test normal,

replace the ECM.

6. Connect a 3 A fused jumper wire between the APP sensor 1 signal circuit terminal E or 3 and the 5 V reference circuit terminal C or 1. Verify

the APP 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/connections test

normal, replace the ECM.

7. Connect a 3 A fused jumper wire between the APP sensor 2 signal circuit terminal B or 6 and the 5 V reference circuit terminal C or 1.

Verify the APP sensor 2 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/connections test

normal, replace the ECM.

8. If all circuits/connections test normal, test or replace the Accelerator Pedal Assembly.

Repair Instructions

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

* Accelerator Pedal Position Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position

Sensor/Service and Repair)

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

programming, and setup

P2122

DTC P2120, P2122, P2123, P2125, P2127, P2128, or P2138

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 P2120

- Accelerator Pedal Position (APP) Sensor 1 Circuit

DTC P2122

- Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

DTC P2123

- Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1330

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1330

瀚慖f less than the specified value, test the 5-volt reference circuit for an open/high resistance. If the circuits/connections test normal, replace

the ECM.

6. Test for 4.8-5.2 V between the signal circuit terminal 2 and ground.

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

ECM.

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

circuit/connections test normal, replace the ECM.

7. If all circuits/connections test normal, replace the camshaft position sensor.

Repair Instructions

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

* Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust (See: Powertrain Management/Computers and Control

Systems/Camshaft Position Sensor/Service and Repair/Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust)

* Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake (See: Powertrain Management/Computers and Control

Systems/Camshaft Position Sensor/Service and Repair/Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake)

* Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust (See: Powertrain Management/Computers and Control

Systems/Camshaft Position Sensor/Service and Repair/Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust)

* Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake (See: Powertrain Management/Computers and Control

Systems/Camshaft Position Sensor/Service and Repair/Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake)

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

programming

P0391

DTC P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, or P0393 (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 P0341

- Intake Camshaft Position Sensor Performance Bank 1

DTC P0342

- Intake Camshaft Position Sensor Circuit Low Voltage Bank 1

DTC P0343

- Intake Camshaft Position Sensor Circuit High Voltage Bank 1

DTC P0346

- Intake Camshaft Position Sensor Performance Bank 2

DTC P0347

- Intake Camshaft Position Sensor Circuit Low Voltage Bank 2

DTC P0348

- Intake Camshaft Position Sensor Circuit High Voltage Bank 2

DTC P0366

- Exhaust Camshaft Position Sensor Performance Bank 1

DTC P0367

- Exhaust Camshaft Position Sensor Circuit Low Voltage Bank 1

DTC P0368

- Exhaust Camshaft Position Sensor Circuit High Voltage Bank 1

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1433

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1433

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 K9 BCM.

4. Ignition OFF, disconnect the X1 harness connector at the K9 BCM.

5. Test for infinite resistance between the signal circuit terminal 3 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 S70L steering wheel control switch-left.

Repair Instructions

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

* Cruise Control Switch Replacement (See: Cruise Control/Cruise Control Switch/Service and Repair)

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

P0572

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

Diagnostic Fault Information

Circuit/System Description

The stop lamp switch signal circuit is a B+ input from the body control module (BCM) to the engine control module (ECM). The ECM monitors

the stop lamp switch circuit to detect when the brake pedal has been applied. The BCM monitors the brake pedal position sensor to determine when

the brake pedal is applied. When the brake pedal is applied, the BCM supplies B+ on the stop lamp switch signal circuit and also sends a serial data

message to the ECM indicating that the brake pedal has been applied.

Conditions for Running the DTC

* The engine is running.

* Battery voltage is greater than 11.5 V.

Conditions for Setting the DTC

P0572

This DTC will set when the ECM detects a short to ground or an open on the discrete brake signal circuit when the serial data message from the

BCM indicates the brakes are applied. This diagnostic will run when the serial data message and the voltage signal on the brake switch signal

circuit do not match for 8 out 10 times, and the condition is present for greater than 2 seconds.

P0573

This DTC will set when the ECM detects a short to voltage on the discrete brake signal circuit when the serial data message from the BCM

indicates the brakes are NOT applied. This diagnostic will run when the serial data message and the voltage signal on the brake switch signal circuit

do not match for 8 out 10 times, and the condition is present for greater than 2 seconds.

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 785

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 785

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 EBCM.

7. Verify the scan tool BMC Primary Piston Position Sensor B parameter is less than 1 V.

瀚慖f greater than the specified range, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the EBCM.

8. Install a 3A fused jumper wire between the signal circuit terminal 1 and the 5 V reference circuit terminal 2. Verify the scan tool BMC

Primary Piston Position Sensor B parameter is greater than 4.5 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 EBCM.

9. If all circuits test normal, replace the brake master cylinder piston position sensor.

Repair Instructions

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

* Brake Master Cylinder Primary Piston Position Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control

Systems/Braking Sensor/Switch/Service and Repair)

* 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, setup, and programming

C12B2

DTC C012A, C128B, C128E, or C12B2-C12B4

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 C012A 00

- Master Cylinder Pressure Sensor

DTC C128E

- Master Cylinder Pressure Sensor

DTC C012A 01

- Master Cylinder Pressure Sensor Short to Battery

DTC C12B3

- Master Cylinder Pressure Sensor Short to Battery

DTC C012A 06

- Master Cylinder Pressure Sensor Short to Ground or Open

DTC C12B2

- Master Cylinder Pressure Sensor Short to Ground or Open

DTC C012A 11

- Master Cylinder Pressure Sensor Above Maximum Threshold

DTC C128B

- Master Cylinder Pressure Sensor Above Maximum Threshold

DTC C012A 0F

- Master Cylinder Pressure Sensor Erratic

DTC C12B4

- Master Cylinder Pressure Sensor Erratic

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 571

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 571

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 HSM.

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

8. If all circuits test normal, replace the HSM.

B2430 0A, B2430 0B, B2430 0C, B2430 0D, B2430 0E, B2430 04, or B2430 1F

1. Ignition OFF, disconnect the X1 harness connector at the HSM.

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

unoccupied, then with the seat occupied.

2. Test for 2.0 - 8.0 Ohms between control circuit terminal 3 and control circuit terminal 2.

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

element.

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

heater element.

3. Disconnect the X2, X4 harness connectors at the HSM.

4. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 20 X4 and the low reference circuit terminal 8 X2.

瀚慖f less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat

cushion heater element/temperature sensor.

瀚慖f greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits

test normal, replace the seat cushion heater element/temperature sensor.

5. Connect the X1, X2, X4 harness connectors at the HSM.

6. Disconnect the harness connector at the seat cushion heater element/temperature sensor.

7. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C 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 circuit tests normal, replace

the HSM.

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

8. If all circuits test normal, replace the HSM.

Repair Instructions

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

* Driver or Passenger Seat Cushion Heater Replacement (without HP2) ()Driver or Passenger Seat Cushion Heater Replacement (with HP2)

()

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

Dealer Installed

DTC B2425 or B2430 (Dealer Installed)

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 B2425 04

- Left Seat Heater Cushion Circuit Open

DTC B2425 0A

- Left Seat Heater Cushion Circuit Rate of Change Below Threshold

DTC B2425 0B

- Left Seat Heater Cushion Circuit Current Above Threshold

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 560

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 560

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 HSM.

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

8. If all circuits test normal, replace the HSM.

B2430 0A, B2430 0B, B2430 0C, B2430 0D, B2430 0E, B2430 04, or B2430 1F

1. Ignition OFF, disconnect the X1 harness connector at the HSM.

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

unoccupied, then with the seat occupied.

2. Test for 2.0 - 8.0 Ohms between control circuit terminal 3 and control circuit terminal 2.

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

element.

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

heater element.

3. Disconnect the X2, X4 harness connectors at the HSM.

4. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 20 X4 and the low reference circuit terminal 8 X2.

瀚慖f less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat

cushion heater element/temperature sensor.

瀚慖f greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits

test normal, replace the seat cushion heater element/temperature sensor.

5. Connect the X1, X2, X4 harness connectors at the HSM.

6. Disconnect the harness connector at the seat cushion heater element/temperature sensor.

7. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C 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 circuit tests normal, replace

the HSM.

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

8. If all circuits test normal, replace the HSM.

Repair Instructions

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

* Driver or Passenger Seat Cushion Heater Replacement (without HP2) ()Driver or Passenger Seat Cushion Heater Replacement (with HP2)

()

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

Dealer Installed

DTC B2425 or B2430 (Dealer Installed)

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 B2425 04

- Left Seat Heater Cushion Circuit Open

DTC B2425 0A

- Left Seat Heater Cushion Circuit Rate of Change Below Threshold

DTC B2425 0B

- Left Seat Heater Cushion Circuit Current Above Threshold

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 526

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 526

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 HSM.

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

8. If all circuits test normal, replace the HSM.

B2180 0A, B2180 0B, B2180 0C, B2180 0D, B2180 0E, B2180 04, or B2180 1F

1. Ignition OFF, disconnect the X1 harness connector at the HSM.

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

unoccupied, then with the seat occupied.

2. Test for 3.5 - 11.5 Ohms between control circuit terminal 3 and control circuit terminal 4.

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

element.

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

heater element.

3. Disconnect the X2, X4 harness connectors at the HSM.

4. Test for 850 - 300 kOhms between the signal circuit terminal 10 X4 and the low reference circuit terminal 7 X2.

瀚慖f less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat

back heater element/temperature sensor.

瀚慖f greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits

test normal, replace the seat back heater element/temperature sensor.

5. Connect the X1, X2, X4 harness connectors at the HSM.

6. Disconnect the harness connector at the seat back heater element/temperature sensor.

7. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C 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 circuit tests normal, replace

the HSM.

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

8. If all circuits test normal, replace the HSM.

Repair Instructions

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

* Driver or Passenger Seat Back Cushion Heater Replacement (Escalade with HP2) ()Driver or Passenger Seat Back Cushion Heater

Replacement (Tahoe with HP2) ()Driver or Passenger Seat Back Cushion Heater Replacement (without HP2) ()

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

Dealer Installed

DTC B1935 or B2180 (Dealer Installed)

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 B1935 04

- Left Seat Back Heater Circuit Open

DTC B1935 0A

- Left Seat Back Heater Circuit Rate of Change Below Threshold

DTC B1935 0B

- Left Seat Back Heater Circuit Current Above Threshold

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 437

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 437

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 BCM.

6. If all circuits test normal, test or replace the headlamp and panel dimmer switch.

Repair Instructions

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

* Headlamp Switch Replacement (Cadillac) (See: Lighting and Horns/Headlamp/Headlamp Switch/Service and Repair/Headlamp Switch

Replacement (Cadillac))Headlamp Switch Replacement (Except Cadillac) (See: Lighting and Horns/Headlamp/Headlamp Switch/Service

and Repair/Headlamp Switch Replacement (Except Cadillac))

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

Power Seats

DTC B1395

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 B1395 02

- Device Voltage Reference Output Circuit Short to Ground

DTC B1395 05

- Device Voltage Reference Output Circuit Short to Battery or Open

Diagnostic Fault Information

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 390

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 390

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 rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.

7. Disconnect the X2 harness connector at the amplifier.

8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 15

* Left rear low level audio signal (-) - terminal 14

* Right rear low level audio signal (+) - terminal 16

* Right rear low level audio signal (-) - terminal 8

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 rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

9. If all circuits test normal, replace the amplifier.

DTC Set by Audio Amplifier UQA

1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.

2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 3 X2

* Right front speaker output (+) - terminal 2 X2

* Right front low speaker output (-) - terminal 1 X2

* Left rear speaker output (+) - terminal 8 X2

* Left rear speaker output (-) - terminal 7 X2

* Right rear speaker output (+) - terminal 6 X2

* Right rear speaker output (-) - terminal 5 X2

* Left or rear subwoofer speaker output (+) - terminal 7 X1

* Left or rear subwoofer speaker output (-) - terminal 3 X1

* Right subwoofer speaker output (+) - terminal 6 X1

* Right subwoofer speaker output (-) - terminal 2 X1

瀚慖f greater than the specified range, test both circuits of the affected speaker for a short to voltage.

3. Radio OFF, test for infinite resistance between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 3 X2

* Right front speaker output (+) - terminal 2 X2

* Right front low speaker output (-) - terminal 1 X2

* Left rear speaker output (+) - terminal 8 X2

* Left rear speaker output (-) - terminal 7 X2

* Right rear speaker output (+) - terminal 6 X2

* Right rear speaker output (-) - terminal 5 X2

* Left or rear subwoofer speaker output (+) - terminal 7 X1

* Left or rear subwoofer speaker output (-) - terminal 3 X1

* Right subwoofer speaker output (+) - terminal 6 X1

* Right subwoofer speaker output (-) - terminal 2 X1

瀚慖f less than the specified value, test both circuits of the affected speaker for a short to ground.

4. If all circuits test normal, reconnect all harness connectors at the amplifier.

5. Ignition ON, radio ON, disconnect the appropriate speaker.

6. Test for 5.0-7.5 volts between the signal circuit terminals and ground.

瀚慖f less then the specified range test the circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.

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

7. If the circuit tests normal, replace the appropriate speaker.

DTC Set by Audio Amplifier UQA with Y91 or UQS

1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.

2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 389

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 389

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 rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.

7. Disconnect the X3 harness connector at the amplifier.

8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 13

* Left rear low level audio signal (-) - terminal 5

* Right rear low level audio signal (+) - terminal 12

* Right rear low level audio signal (-) - terminal 4

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 rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

9. If all circuits test normal, replace the amplifier.

DTC Set By Radio UQA with Y91 and U42 or UQS and U42

1. Ignition OFF, disconnect the X3 and X4 harness connectors at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 11 X3

* Left front low level audio signal (-) - terminal 12 X3

* Right front low level audio signal (+) - terminal 3 X3

* Right front low level audio signal (-) - terminal 4 X3

* Left rear low level audio signal (+) - terminal 11 X4

* Left rear low level audio signal (-) - terminal 12 X4

* Right rear low level audio signal (+) - terminal 3 X4

* Right rear low level audio signal (-) - terminal 4 X4

* Subwoofer low level audio signal (+) - terminal 5 X4

* Subwoofer low level audio signal (-) - terminal 6 X4

* Center Channel low level audio signal (+) - terminal 13 X4

* Center Channel low level audio signal (-) - terminal 14 X4

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 radio.

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

3. If all circuits test normal, replace the amplifier.

DTC Set By Radio UQA with Y91 and U42 or UQS and U42

1. Ignition OFF, disconnect the X3 and X4 harness connector at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 11 X3

* Left front low level audio signal (-) - terminal 12 X3

* Right front low level audio signal (+) - terminal 3 X3

* Right front low level audio signal (-) - terminal 4 X3

* Subwoofer low level audio signal (+) - terminal 5 X4

* Subwoofer low level audio signal (-) - terminal 6 X4

* Center Channel low level audio signal (+) - terminal 13 X4

* Center Channel low level audio signal (-) - terminal 14 X4

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 radio.

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

3. Ignition OFF, reconnect the X3 harness connector at the amplifier.

4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.

5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 1

* Left rear low level audio signal (-) - terminal 2

* Right rear low level audio signal (+) - terminal 3

* Right rear low level audio signal (-) - terminal 4

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 383

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 383

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 radio.

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

3. If all circuits test normal, replace the amplifier.

DTC Set By Radio UQA with Y91 and U42 or UQS and U42

1. Ignition OFF, disconnect the X3 and X4 harness connector at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 11 X3

* Left front low level audio signal (-) - terminal 12 X3

* Right front low level audio signal (+) - terminal 3 X3

* Right front low level audio signal (-) - terminal 4 X3

* Subwoofer low level audio signal (+) - terminal 5 X4

* Subwoofer low level audio signal (-) - terminal 6 X4

* Center Channel low level audio signal (+) - terminal 13 X4

* Center Channel low level audio signal (-) - terminal 14 X4

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 radio.

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

3. Ignition OFF, reconnect the X3 harness connector at the amplifier.

4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.

5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 1

* Left rear low level audio signal (-) - terminal 2

* Right rear low level audio signal (+) - terminal 3

* Right rear low level audio signal (-) - terminal 4

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 rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.

7. Disconnect the X2 harness connector at the amplifier.

8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 15

* Left rear low level audio signal (-) - terminal 14

* Right rear low level audio signal (+) - terminal 16

* Right rear low level audio signal (-) - terminal 8

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 rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

9. If all circuits test normal, replace the amplifier.

DTC Set by Audio Amplifier UQA

1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.

2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 3 X2

* Right front speaker output (+) - terminal 2 X2

* Right front low speaker output (-) - terminal 1 X2

* Left rear speaker output (+) - terminal 8 X2

* Left rear speaker output (-) - terminal 7 X2

* Right rear speaker output (+) - terminal 6 X2

* Right rear speaker output (-) - terminal 5 X2

* Left or rear subwoofer speaker output (+) - terminal 7 X1

* Left or rear subwoofer speaker output (-) - terminal 3 X1

* Right subwoofer speaker output (+) - terminal 6 X1

* Right subwoofer speaker output (-) - terminal 2 X1

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 992

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 992

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 ESCM.

7. If all circuits test normal, test or replace the ALC compressor.

Component Testing

1. Ignition OFF, disconnect the air compressor harness connector.

2. Test the exhaust valve for 18-45 ohms between the control terminal and the battery positive terminal.

瀚慖f not within the specified range, replace the air compressor.

3. Test for infinite resistance between the control terminal and ground.

瀚慖f less than the specified value, replace the air compressor.

Repair Instructions

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

* Air Compressor Replacement (See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic

)/Compressor/Pump/Service and Repair)

* Suspension Position Calibration (With Z95) (See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic

)/Service and Repair/Suspension Position Calibration (With Z95))Suspension Position Calibration (Without Z95) (See: Steering and

Suspension/Suspension/Suspension Control ( Automatic - Electronic )/Service and Repair/Suspension Position Calibration (Without Z95))

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

C0696

DTC C0696

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 C0696 00

- Position Sensor Overcurrent

Diagnostic Fault Information

Circuit/System Description

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 848

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 848

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 EBCM.

7. Verify the scan tool BMC Primary Piston Position Sensor B parameter is less than 1 V.

瀚慖f greater than the specified range, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the EBCM.

8. Install a 3A fused jumper wire between the signal circuit terminal 1 and the 5 V reference circuit terminal 2. Verify the scan tool BMC

Primary Piston Position Sensor B parameter is greater than 4.5 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 EBCM.

9. If all circuits test normal, replace the brake master cylinder piston position sensor.

Repair Instructions

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

* Brake Master Cylinder Primary Piston Position Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control

Systems/Braking Sensor/Switch/Service and Repair)

* Brake Pressure Modulator Valve Replacement ()

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

Brake Pedal Position Sensor 4 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

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 538

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 538

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

the MSM.

* Seat front vertical position sensor terminal 1

* Seat rear vertical position sensor terminal 5

* Seat horizontal position sensor terminal 3

5. Install a 3A fused jumper wire between the appropriate signal circuit listed below and the 5-volt reference circuit terminal 6. Verify the

appropriate scan tool driver seat position sensor parameter is greater than 4.75 volts.

* Seat horizontal position sensor terminal 3

* Seat front vertical position sensor terminal 1

* Seat rear vertical position sensor terminal 5

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

MSM.

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

B1850 01, B1850 06, B1860 01 or B1860 06

1. Ignition OFF, disconnect the X2 harness connector at the lumbar adjuster assembly.

2. Test for less than 2 ohms between the low reference circuit terminal C and ground.

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

3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground.

瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the MSM.

瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.

4. Verify the appropriate scan tool lumbar sensor parameter is less than 1 volt.

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

the MSM.

* Lumbar vertical position sensor terminal B

* Lumbar horizontal position sensor terminal D

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

appropriate scan tool lumbar sensor parameter is greater than 4.75 volts.

* Lumbar vertical position sensor terminal B

* Lumbar horizontal position sensor terminal D

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

MSM.

6. If all circuits test normal, test or replace the lumbar position sensor.

Repair Instructions

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

* Front Seat Adjuster Replacement (with HP2) ()Front Seat Adjuster Replacement (without HP2) ()

* Seat Lumbar Sub System Replacement ()

* Front Seat Recliner Actuator Motor Replacement ()

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

Rear Heated Seat Module

DTC B1925 or B2170 (w/o HP2 with Memory)

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.

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 463

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 463

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 BCM.

6. If all circuits test normal, test or replace the headlamp and panel dimmer switch.

Repair Instructions

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

* Headlamp Switch Replacement (Cadillac) (See: Lighting and Horns/Headlamp/Headlamp Switch/Service and Repair/Headlamp Switch

Replacement (Cadillac))Headlamp Switch Replacement (Except Cadillac) (See: Lighting and Horns/Headlamp/Headlamp Switch/Service

and Repair/Headlamp Switch Replacement (Except Cadillac))

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

Power Seats

DTC B1395

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 B1395 02

- Device Voltage Reference Output Circuit Short to Ground

DTC B1395 05

- Device Voltage Reference Output Circuit Short to Battery or Open

Diagnostic Fault Information

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 405

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 405

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 rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.

7. Disconnect the X2 harness connector at the amplifier.

8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 15

* Left rear low level audio signal (-) - terminal 14

* Right rear low level audio signal (+) - terminal 16

* Right rear low level audio signal (-) - terminal 8

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 rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

9. If all circuits test normal, replace the amplifier.

DTC Set by Audio Amplifier UQA

1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.

2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 3 X2

* Right front speaker output (+) - terminal 2 X2

* Right front low speaker output (-) - terminal 1 X2

* Left rear speaker output (+) - terminal 8 X2

* Left rear speaker output (-) - terminal 7 X2

* Right rear speaker output (+) - terminal 6 X2

* Right rear speaker output (-) - terminal 5 X2

* Left or rear subwoofer speaker output (+) - terminal 7 X1

* Left or rear subwoofer speaker output (-) - terminal 3 X1

* Right subwoofer speaker output (+) - terminal 6 X1

* Right subwoofer speaker output (-) - terminal 2 X1

瀚慖f greater than the specified range, test both circuits of the affected speaker for a short to voltage.

3. Radio OFF, test for infinite resistance between the appropriate signal circuit terminal listed below and ground:

* Left front speaker output (+) - terminal 4 X2

* Left front speaker output (-) - terminal 3 X2

* Right front speaker output (+) - terminal 2 X2

* Right front low speaker output (-) - terminal 1 X2

* Left rear speaker output (+) - terminal 8 X2

* Left rear speaker output (-) - terminal 7 X2

* Right rear speaker output (+) - terminal 6 X2

* Right rear speaker output (-) - terminal 5 X2

* Left or rear subwoofer speaker output (+) - terminal 7 X1

* Left or rear subwoofer speaker output (-) - terminal 3 X1

* Right subwoofer speaker output (+) - terminal 6 X1

* Right subwoofer speaker output (-) - terminal 2 X1

瀚慖f less than the specified value, test both circuits of the affected speaker for a short to ground.

4. If all circuits test normal, reconnect all harness connectors at the amplifier.

5. Ignition ON, radio ON, disconnect the appropriate speaker.

6. Test for 5.0-7.5 volts between the signal circuit terminals and ground.

瀚慖f less then the specified range test the circuit for an open/high resistance. If the circuit tests normal, replace the amplifier.

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

7. If the circuit tests normal, replace the appropriate speaker.

DTC Set by Audio Amplifier UQA with Y91 or UQS

1. Ignition OFF, disconnect the X1 and X2 connectors at the amplifier.

2. Radio ON, test for less than 1 volt between the appropriate signal circuit terminal listed below and ground:

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 404

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 404

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 rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

6. Ignition OFF, reconnect the X2 harness connector at the rear seat audio (RSA) module.

7. Disconnect the X3 harness connector at the amplifier.

8. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 13

* Left rear low level audio signal (-) - terminal 5

* Right rear low level audio signal (+) - terminal 12

* Right rear low level audio signal (-) - terminal 4

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 rear seat audio (RSA) module.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the rear seat audio (RSA)

module.

9. If all circuits test normal, replace the amplifier.

DTC Set By Radio UQA with Y91 and U42 or UQS and U42

1. Ignition OFF, disconnect the X3 and X4 harness connectors at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 11 X3

* Left front low level audio signal (-) - terminal 12 X3

* Right front low level audio signal (+) - terminal 3 X3

* Right front low level audio signal (-) - terminal 4 X3

* Left rear low level audio signal (+) - terminal 11 X4

* Left rear low level audio signal (-) - terminal 12 X4

* Right rear low level audio signal (+) - terminal 3 X4

* Right rear low level audio signal (-) - terminal 4 X4

* Subwoofer low level audio signal (+) - terminal 5 X4

* Subwoofer low level audio signal (-) - terminal 6 X4

* Center Channel low level audio signal (+) - terminal 13 X4

* Center Channel low level audio signal (-) - terminal 14 X4

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 radio.

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

3. If all circuits test normal, replace the amplifier.

DTC Set By Radio UQA with Y91 and U42 or UQS and U42

1. Ignition OFF, disconnect the X3 and X4 harness connector at the amplifier.

2. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left front low level audio signal (+) - terminal 11 X3

* Left front low level audio signal (-) - terminal 12 X3

* Right front low level audio signal (+) - terminal 3 X3

* Right front low level audio signal (-) - terminal 4 X3

* Subwoofer low level audio signal (+) - terminal 5 X4

* Subwoofer low level audio signal (-) - terminal 6 X4

* Center Channel low level audio signal (+) - terminal 13 X4

* Center Channel low level audio signal (-) - terminal 14 X4

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 radio.

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

3. Ignition OFF, reconnect the X3 harness connector at the amplifier.

4. Disconnect the X2 harness connector at the rear seat audio (RSA) module.

5. Radio ON, test for 5.0-7.5 volts between the appropriate signal circuit terminal listed below and ground.

* Left rear low level audio signal (+) - terminal 1

* Left rear low level audio signal (-) - terminal 2

* Right rear low level audio signal (+) - terminal 3

* Right rear low level audio signal (-) - terminal 4

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1089

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1089

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 trailer brake control module.

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

module.

10. If all circuits test normal, test or replace the trailer brake controller switch panel.

Repair Instructions

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

* Trailer Brake Control Switch Replacement (See: Accessories and Optional Equipment/Towing / Trailer System/Trailer Brake Control

Module/Service and Repair/Trailer Brake Control Switch Replacement)

* Trailer Brake Control Module Replacement (See: Accessories and Optional Equipment/Towing / Trailer System/Trailer Brake Control

Module/Service and Repair/Trailer Brake Control Module Replacement)

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

Gasoline Without LY6

DTC C0870, C1112, C1113, C1114, or C1119 (Gasoline Without LY6)

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 C0870 00

- Device Voltage Reference Output 1 Circuit

DTC C1112 00

- Trailer Brake Control Relay Low Control Circuit

DTC C1113 01

- Trailer Brake Control Relay High Control Circuit Short to Battery

DTC C1114 00

- Trailer Brake Control Solenoids Control Circuit

DTC C1119 00

- Trailer Brake Control Relay Feedback Circuit

Diagnostic Fault Information

Circuit/System Description

The trailer brake control relay receives inputs from the fuel pump/trailer brake control module, these inputs are used to determine the amount of

voltage the relay will supply to the trailer brakes.

Conditions for Running the DTC