Note: Review the system operation in order to familiarize yourself with the system functions.
Refer to Park Brake System Description and Operation. For cars with electronic park brake also refer to Electronic Parking Brake Control Module Description.
Mechanical Park Brake System
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of the park brake system. |
| • | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. |
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
Electronic Park Brake System (EPB)
Note: 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 EPB. 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:
