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
- Brake Booster Pressure Sensor Performance

DTC C0299 5A
- 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 (Connector End Views By Name)
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 (Brake Assist System Diagnosis).
2. Verify that DTC C1100 is not set.

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