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.
