C0299

DTC C0299

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptor
DTC C0299 5A
- Brake Booster Performance Plausibility

Circuit/System Description

The electronic brake control module (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

* The ignition is ON.
* Ignition voltage is greater than 9 volts.
* The engine is running for the vacuum related fault to set.

Conditions for Setting the DTC

A condition in which no vacuum is detected in the power brake booster for approximately 3-5 minutes after engine running.

Action Taken When the DTC Sets

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

Conditions for Clearing the DTC

* The condition for the DTC is no longer present.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

When C0299 is set as current, you may feel brake pedal pulsation due to optimized hydraulic braking activations.

Reference Information
Schematic Reference

Antilock Brake System Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation Reference

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

1. Verify that DTC C1100 is not set.

• If DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code Descriptions).

2. Verify that a vacuum leak is not present, refer to Brake Assist System Diagnosis (Component Tests and General Diagnostics).