2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 764

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 764

Verify that DTC C005A is not set.

If the DTC is set, refer to DTC C0035-C0050, C1207-C1210, C1221-C1228, or C1232-C1235 ( See: C Code Charts/C0035)

C012A

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

* The ignition is ON.

* Ignition voltage is greater than 10 volts.

* The brake pedal is not applied.

Conditions for Setting the DTC

C012A 00, C128E or C128B

Internal sensor failure is detected.