2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 892
* Terminal 38
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuits listed below and ground:
* Terminal 25
* Terminal 1
瀚慖f the test lamp does not illuminate, test the B+ 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 Q5 brake pressure modulator valve assembly.
4. If all circuits test normal, replace the Q5 brake pressure modulator valve assembly and verify DTC does not reset. If the DTC resets, replace
the K17 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
C012F
DTC C012F, C12A7, C12DC, or C12DD
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 C012F 00
- Brake Boost Solenoid Valve Circuit
DTC C012F 0E
- Brake Boost Solenoid Valve Circuit Shorted
DTC C12A7
- Brake Boost Solenoid Valve Circuit Performance
DTC C12DC
- Brake Boost Solenoid Valve Circuit Malfunction
DTC C12DD
- Brake Boost Solenoid Valve Circuit Shorted
Circuit/System Description
The electronic brake control module (EBCM) uses input from the boost pressure sensor for more accurate control during brake and vehicle stability
enhancement system (VSES) event. The boost pressure sensor is internal to the brake pressure modulator valve (BPMV).
Conditions for Running the DTC
* The ignition is ON.
* Ignition voltage is greater than 10 volts.
Conditions for Setting the DTC
C012F 00, C12A7, C12DC
Solonoid feedback current greater than 25% of commanded current.
