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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 879

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

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