2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 771

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 771

- High Pressure Accumulator Pressure Sensor Short to Battery

DTC C012B 06

- High Pressure Accumulator Pressure Sensor Short to Ground or Open

DTC C12B6

- High Pressure Accumulator Pressure Sensor Short to Ground or Open

DTC C012B 0F

- High Pressure Accumulator Pressure Sensor Erratic

DTC C12B8

- High Pressure Accumulator Pressure Sensor Erratic

Circuit/System Description

The high pressure accumulator is attached to the brake pressure modulator valve and provides up to 2500 psi for use in apply the brakes. The

electronic brake control module (EBCM) uses input from the high pressure accumulator sensor for more accurate control during braking and

vehicle stability enhancement system (VSES) event. The high pressure accumulator sensor is internal to the brake pressure modulator valve

(BPMV).

Conditions for Running the DTC

* Ignition ON.

* Ignition voltage is greater than 10 volts.

Conditions for Setting the DTC

C012B 01 or C12B7

A short to battery is detected on the sensor signal circuit.

C012B 06 or C12B6

A short to ground or open is detected on signal circuit.

C012B OF or C12B8

Signal is erratic and changes faster than physically allowed.

Action Taken When the DTC Sets

* The EBCM disables the ABS and vehicle stability enhancement system (VSES) for the duration of the ignition cycle.

* A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

* The condition for setting the DTC is no longer present.

* The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

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

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring