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 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

Hydraulic Brake Schematics (Electrical Diagrams)
Connector End View Reference

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

Brake Assist System Description and Operation (Brake Assist System Description and Operation)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
* Connector Repairs (Connector Repairs)

Scan Tool Reference

Programming and Relearning (Programming and Relearning)for scan tool information

Circuit/System Verification

1. Verify that DTC C1100 is not set.

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