2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 787

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 787

Circuit/System Verification

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

2. Verify that DTC C012A, C128B, C128E, C12B2, C12B3, or C12B4 is not set.

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

C12B3

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

Circuit/System Description

The electronic brake control module (EBCM) uses input from the master cylinder pressure sensor for more accurate control during a vehicle

stability enhancement system event. The master cylinder pressure sensor is internal to the brake pressure modulator valve.

Conditions for Running the DTC