Symptom Chart

SYMPTOM	POSSIBLE CAUSE	ACTION
The electric park brake will not engage or release (with no park brake warning message)	Both electric park brake control module fuse(s) failure Electric park brake actuator incorrectly installed to the vehicle Rear brake lining wear Service brake incorrectly adjusted following lining change Brake caliper malfunction Electric park brake actuator internal fault	Check fuse(s) Check both electric park brake actuators are correctly installed to the vehicle. Rectify as required Inspect the rear brake linings for wear Re-calibrate the electric park brake, refer to the calibration procedure Check the rear service brake for correct installation and operation Check for related electric park brake control module actuator DTCs and refer to the relevant DTC index
The electric park brake will not engage or release (with park brake warning message)	Electric park brake actuator incorrectly installed to the vehicle Rear brake lining wear Brake caliper malfunction Electric park brake actuator internal fault	Check both electric park brake actuators are correctly installed to the vehicle. Rectify as required Inspect the rear brake linings for wear Check the rear service brake for correct installation and operation Check for related electric park brake control module actuator DTCs and refer to the relevant DTC index
No communication with the electric park brake control module	Fuse(s) Module off bus CAN network error Electric park brake control module internal fault	Check fuse(s) Ensure battery is fully charged and in serviceable condition. Check battery voltage at electric park brake control module Check CAN bus using manufacturer approved diagnostic system Check for related electric park brake control module actuator DTCs and refer to the relevant DTC index
'Park brake Fault' displayed on message center with associated warning lamps	Electric park brake control module internal fault	Check for related electric park brake control module actuator DTCs and refer to the relevant DTC index
Brakes drag	Electric park brake actuator incorrectly installed to the vehicle Rear brake lining wear Brake caliper malfunction Electric park brake actuator internal fault	Check both electric park brake actuators are correctly installed to the vehicle. Rectify as required Inspect the rear brake linings for wear Check the rear service brake for correct installation and operation Check for related electric park brake control module actuator DTCs and refer to the relevant DTC index

DTC Index

For a complete list of all diagnostic trouble codes that could be logged on this vehicle, please refer to Diagnostic Trouble Code Index - DTC: Electric Park Brake Control Module (EPBCM)