2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1669

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1669

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

4. Ignition ON, verify the scan tool ECM PNP Switch parameter displays In Gear.

瀚慖f not the specified value, test the P/N signal circuit for a short to ground. If the circuit tests normal, replace the engine control module.

5. Connect a 3-amp fused jumper wire between the TCM harness connector terminal 3 and terminal 18. Verify the PNP Switch parameter

changes to Park/Neutral.

瀚慖f not the specified value, test the P/N signal circuit for an open/high resistance. If the circuit tests normal, replace the engine control

module.

6. Ignition OFF, remove the control valve body cover. Refer to Control Valve Body Cover Replacement (See: Transmission and

Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair/6T70/6T75 - Automatic Transmission/Control Valve Body

Cover Replacement).

7. Connect the TCM harness connector.

8. Disconnect the IMS connector at the control solenoid valve assembly.

9. Ignition ON, verify the scan tool IMS A/B/C/P parameter displays HI for all four signal circuits.

瀚慖f not the specified value, replace the control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control

Module Assembly Replacement (See: Powertrain Management/Transmission Control Systems/Actuators and Solenoids - Transmission

and Drivetrain/Actuators and Solenoids - A/T/Shift Solenoid/Service and Repair).

10. Verify the scan tool ECM PNP Switch parameter displays In Gear.

瀚慖f not the specified value, replace the control solenoid valve assembly.

11. Connect a 3-amp fused jumper wire between each transmission range signal circuit terminal listed below and the IMS ground circuit,

terminal A. Verify the corresponding scan tool IMS A/B/C/P parameter displays LOW when terminals E, D, C, and B are connected to the

IMS ground and the ECM PNP Switch parameter displays Park/Neutral when terminal F is connected to ground.

* Switch Signal A terminal E

* Switch Signal B terminal D

* Switch Signal C terminal C

* Switch Signal P terminal B

* PNP Switch Signal terminal F

瀚慖f not the specified value, replace the control solenoid valve assembly.

12. If all circuits test normal, replace the IMS.

Repair Instructions

Important:

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

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

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

Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General

Diagnostics/6T70/6T75 - Automatic Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

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

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

replacement, setup, and programming

* Range Selector Lever Cable Adjustment (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Shift Linkage/Shift

Cable/Adjustments)

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

Repair/6T70/6T75 - Automatic Transmission/Control Valve Body Cover Replacement)

* Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement (See: Powertrain Management/Computers and Control

Systems/Sensors and Switches - Computers and Control Systems/Transmission Position Sensor/Switch/Service and Repair)

P0851

DTC P0850-P0852

Diagnostic Instructions

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1048

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1048

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

4. Install fuse that supplies B+ to terminal 56 X2 of the ECM.

Caution: Do NOT use the low reference circuit in the component harness connector for this test. Damage to the control module may occur

due to excessive current draw.

5. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 4 and ground.

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

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

6. Test for 4.8-5.2 V between the signal circuit terminal 5 and the ground circuit terminal 2.

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

normal, replace the K20 ECM.

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

ECM.

7. Ignition OFF, connect the red lead of the J 38522 to the signal circuit terminal 5 at the B75 MAF sensor harness connector. Connect the

battery voltage supply to B+, and the black lead to ground.

8. Set the J 38522 Signal switch to 5 V, the Frequency switch to 5K, and the Duty Cycle switch to Normal.

9. Ignition ON, observe the scan tool MAF Sensor Hz parameter. The parameter should be between 4,950-5,050 Hz.

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

10. If all circuits/connections test normal, replace the B75 MAF sensor.

Repair Instructions

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

* Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (LF1) (See: Powertrain Management/Computers and Control

Systems/Air Temperature Sensor ( Ambient / Intake )/Service and Repair)Mass Airflow Sensor with Intake Air Temperature Sensor

Replacement (LAU) (See: Powertrain Management/Computers and Control Systems/Air Temperature Sensor ( Ambient / Intake )/Service

and Repair)

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

programming

P0106

DTC P0106 (LF1)

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 P0106

- Manifold Absolute Pressure (MAP) Sensor Performance

Diagnostic Fault Information

Typical Scan Tool Data

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 769

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 769

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

3. Ignition ON, verify that a test lamp illuminates between the B+ circuits listed below and ground.

* Terminal 1

* Terminal 25

瀚慖f the test lamp does not illuminate, test the appropriate circuit for a short to ground or an open/high resistance.

4. If all circuits test normal, replace the EBCM.

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 EBCM replacement, setup, and programming

Brake Boost Solenoid

DTC C012F, C12A7, C12DC, or C12DD

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 C012F 00

- Brake Boost Solenoid Valve Circuit

DTC C012F 0E

- Brake Boost Solenoid Valve Circuit Shorted

DTC C12A7

- Brake Boost Solenoid Valve Circuit Performance

DTC C12DC

- Brake Boost Solenoid Valve Circuit Malfunction

DTC C12DD

- Brake Boost Solenoid Valve Circuit Shorted

Circuit/System Description

The electronic brake control module (EBCM) uses input from the boost pressure sensor for more accurate control during brake and vehicle stability

enhancement system (VSES) event. The boost pressure sensor is internal to the brake pressure modulator valve (BPMV).

Conditions for Running the DTC

* The ignition is ON.

* Ignition voltage is greater than 10 volts.

Conditions for Setting the DTC

C012F 00, C12A7, C12DC

Solonoid feedback current greater than 25% of commanded current.

C012F 0E, C12DD

Solonoid feedback current greater than 50% of requested current.

Action Taken When the DTC Sets

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 845

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 845

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

3. Ignition ON, verify that a test lamp illuminates between the B+ circuit Terminal 13 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, replace the BPMV.

4. If all circuits test normal, replace the BPMV and verify DTC does not reset. 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/Greater than/Equal to 3900 kg (8600 lb) GVW)

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

Brake Pedal Position Sensor 4 Not Plausible

DTC C0277, C120C, C129A, C129B, C129D, C129E, C12B1, 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 C0277 03

- BMC Primary Piston Position Sensor A and B Circuit Performance Voltage Below Threshold

DTC C129A

- Brake Pedal Position Sensor 3 Circuit Low

DTC C129D

- Brake Pedal Position Sensor 4 Circuit Low

DTC C0277 07

- BMC Primary Piston Position Sensor A and B Circuit Voltage Above Threshold

DTC C129B

- Brake Pedal Position Sensor 3 Circuit High

DTC C129E

- Brake Pedal Position Sensor 4 Circuit High

DTC C0277 5A

- BMC Primary Piston Position Sensor A and B Circuit Plausibility Failure

DTC C12B1

- ABS Master Cylinder Pressure Sensor and Brake Pedal Position Sensor Not Plausible

DTC C12F8

- Brake Pedal Position Sensor 3 Not Plausible

DTC C120C

- Brake Pedal Position Sensor 4 Not Plausible

Diagnostic Fault Information