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Home >> Jaguar >> 2012 >> XJ Base >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Parking Brake & Actuation -- XJ/X351 >> Parking Brake And Actuation >> Diagnosis And Testing >> Symptom Chart

Symptom Chart

SYMPTOM POSSIBLE CAUSE ACTION
The electric park brake will not engage or release (with no electric 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 left electric park brake actuator is correctly installed to the vehicle. Rectify as required.
  • Check the rear and primary cables for correct installation and damage.
  • Inspect the rear brake linings for wear.
  • Re-calibrate the 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 DTCs and refer to the relevant DTC index.
The electric park brake will not engage or release (with no electric 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 left electric park brake actuator is 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 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 network using manufacturer approved diagnostic system.
  • Check for related electric park brake control module DTCs and refer to the relevant DTC index.
'Park Brake Fault' displayed on message centre with associated warning lamps
  • Electric park brake control module internal fault
  • Check for related electric park brake control module 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 left electric park brake actuator is 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 DTCs and refer to the relevant DTC index.