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
