Symptoms - Park Brake

Review the system operation in order to familiarize yourself with the system functions. Refer to Park Brake System Description and Operation , and Electronic Parking Brake Description .

The following steps must be completed before using the symptom tables. Perform the Diagnostic System Check - Vehicle before using the symptom tables in order to verify that all of the following are true:

• There are no DTCs set.
• The control modules can communicate via the serial data link.

Visual/Physical Inspection

• Inspect for aftermarket devices which could affect the operation of the electronic parking brake. Refer to Checking Aftermarket Accessories .
• Inspect the easily accessible or visible system components, for obvious damage or conditions, which could cause the symptom.

Intermittent 

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List 

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom: Park Brake Will Not Hold or Release