2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 879
DTC C12E2 00
- Device Voltage High - EBCM 12V
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The electronic brake control module (EBCM) monitors the 12 V battery positive (B+) voltage. If the voltage level is too high, damage may result in
the system. When a high voltage condition is detected the EBCM turns OFF the system relay which removes 12 V battery voltage from the solenoid
valves and pump motor, and DTC C0900 sets.
Conditions for Running the DTC
Ignition is ON.
Conditions for Setting the DTC
The 12 V battery voltage is greater than 16 volts for 100 msec.
Action Taken When the DTC Sets
* The traction control system (TCS) and vehicle stability enhancement system (VSES) are disabled for the duration of the ignition cycle.
* The antilock brake system (ABS) is disabled if ignition voltage exceeds 19.5 V.
* The stability system off and traction control off indicators turn ON.
* The ABS indicator turns ON if voltage exceeds 19.5 V.
Conditions for Clearing the DTC
* The DTC will pass when the battery voltage is less than 15.5 V for 100 msec.
* The EBCM automatically clears a history DTC when a current DTC is not detected in 100 consecutive drive cycles.
* The indicators and DIC messages turn OFF when the DTC is cleared, or on the next malfunction-free ignition cycle.
Diagnostic Aids
* This DTC could be set by overcharging with a battery charger.
* A high voltage DTC in multiple modules indicates a concern in the charging system.
Reference Information
Schematic Reference
Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation/ABS
Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
