C0299

DTC C0299

Diagnostic Instructions

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

DTC Descriptor

DTC C0299

Brake Booster Performance

Diagnostic Fault Information





Circuit/System Description

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

* 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 10 seconds after start-up.
* A condition in which low vacuum is detected in the power brake booster for approximately 60 seconds or longer after start-up, or is detected while driving.

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.

Circuit/System Verification

1. Verify that a vacuum leak is not present, refer to Brake Assist System Diagnosis. Component Tests and General Diagnostics
2. Verify that the following DTC is not set: C1100.
^ If the DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle. Diagnostic Trouble Code Descriptions