2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 882

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 882

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 C0299 00

- Brake Booster Pressure Sensor Performance

DTC C0299 5A

- Brake Booster Pressure Sensor Performance Plausibility Failure

Diagnostic Fault Information

Circuit/System Description

The electronic brake control module (EBCM) provides power and ground circuits to the power brake booster actuator. The power brake booster

actuator converts electrical inputs into a mechanical force to apply the brake booster to assist the driver as necessary in stability control. The EBCM

monitors the vacuum level in the power brake booster, and will set a DTC if the vacuum is too low.

Conditions for Running the DTC

C0299 00

* Ignition ON.

* Ignition voltage is greater than10 volts.

C0299 5A

* Ignition ON.

* Engine Running.

* Ignition voltage is greater than 10 volts.

Conditions for Setting the DTC

C0299 00

The EBCM detects a short to ground, open/high resistance or a short to voltage on the power brake booster actuator control circuits.

C0299 5A

* No vacuum is detected in the power brake booster for approximately 10 seconds after start-up.

* Low vacuum is detected in the power brake booster for approximately 60 seconds or longer after start-up, or is detected while driving.

Action Taken when the DTC Sets

* The EBCM disables the active vacuum booster 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 the DTC is no longer present.

* The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Reference Information

Schematic Reference

Hydraulic Brake Schematics (See: Brakes and Traction Control/Hydraulic System/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation