2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 884

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 884

Description and Operation

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

Description and Operation)

Electrical Information Reference

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

Testing/Circuit Testing)

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

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

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

Repairs/Wiring Repairs)

Scan Tool Reference

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

Circuit/System Testing

1. Verify DTC C0455 is not set.

瀚慖f DTC is set, refer to DTC C0455 (See: C Code Charts/C0455).

2. Verify DTC C0277 is not set.

瀚慖f DTC is set, refer to DTC C0277, C120C, C129A, C129B, C129D, C129E, C12B1, or C12F8 (See: C Code Charts/C0277/Antilock

Brake System - Hybrid (HP2)).

3. Ignition OFF, disconnect the harness connector at the electronic brake control position sensor.

4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 2 and ground.

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

replace the EBCM.

瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the 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, programming and setup

C12E6

DTC C0256, C12E6, or C12E7

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 C0256 04

- Valve Relay Contact Circuit Open

DTC C12E6

- Valve Relay Contact Circuit Open

DTC C0256 0E

- Valve Relay Contact Circuit Resistance Below Threshold