2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 886
* Terminal 1
* Terminal 25
瀚慖f the test lamp does not illuminate, test the appropriate circuit for a short to ground or an open/high resistance. If the circuit tests normal
and the B+ circuit fuse is open, replace the BPMV.
4. If all circuits test normal, replace the BPMV and verify DTC does not reset. If the DTC resets, replace the 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
C12E7
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
DTC C12E7
- Valve Relay Contact Circuit Resistance Below Threshold
Circuit/System Description
The base brake solenoid relay, located within the electronic brake control module (EBCM), supplies battery voltage to all of the valve solenoids.
Conditions for Running the DTC
* Ignition ON.
* The ignition voltage is greater than 10 V.
Conditions for Setting the DTC
C0256 04 or C12E6
* The EBCM detects an open in the circuits to the solenoid valve relay.
* The EBCM detects a stuck open solenoid valve relay.
C0256 0E or C12E7
* The EBCM detects an short to battery in the circuits to the solenoid valve relay.
* The EBCM detects a stuck closed solenoid valve relay.
Action Taken When the DTC Sets
* The EBCM disables the antilock brake system (ABS) and the vehicle stability enhancement system (VSES) for the duration of the ignition
cycle.
* A DIC message and/or a warning indicator may be displayed.
