C0299

DTC C0299

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0299 00

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Brake Booster Pressure Sensor Performance

DTC C0299 5A

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Brake Booster Pressure Sensor Performance Plausibility Failure

Circuit/System Description

The power brake booster vacuum sensor monitors the vacuum level in the power brake booster. When the electronic brake control module (EBCM) detects the vacuum level is low a DTC is set.

Conditions for Running the DTC

The engine is running.

Conditions for Setting the DTC

Low or no vacuum is detected in the power brake booster after start-up.

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 Electrical Diagrams

Connector End View Reference

Component Connector End Views A/C Compressor Clutch

Description and Operation

Brake Assist System Description and Operation Brake Assist System

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Programming and Relearning for scan tool information

Circuit/System Verification

1. Verify that a vacuum leak is not present, refer to Brake Assist System Diagnosis Testing and Inspection.

2. Verify that DTC C1100 is not set.

• If DTC is set, refer to DTC C1100 C1100.