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Electric Park Brake (EPB) Will Not Engage

When the parking brake is operated, the rear wheels are not locked. 

STEP OPERATIONS TO BE CARRIED OUT TEST RESULTS
CHECK USING DIAGNOSIS EQUIPMENT EVERYTHING OK PROBLEMS ENCOUNTERED OPERATION
1  Connect the diagnosis equipment and check on the Antilock Brake System (ABS)/EPB control unit in error environment mode:
  • that there are no faults

in parameters mode:
  • the plausibility of all the parameters
 Go to Step 2  . 1. No dialogue with the ABS/EPB control unit. 1. Restore the correct power supply for the ABS/EPB control unit.
2. Presence of errors in the ABS/EPB control unit 2. Proceed as instructed by the diagnosis equipment.
2  With diagnosis equipment connector, perform the rear brake caliper diagnosis in "Actuators" environment. Go to Step 4  . Actuators do not activate Go to Step 3  .
3  Check the continuity and insulation of electrical connections between ABS/EPB control unit and rear caliper "actuators"
Refer to PARKING BRAKE, DESCRIPTION AND OPERATION .		 Go to Step 4  . Electrical connections fault Repair the connections. Refer to PARKING BRAKE, DESCRIPTION AND OPERATION .
4  Check that static and dynamic operation of the parking brake is correct. End of diagnosis Fault persists Replace the ICU. Refer to INTEGRATED CONTROL UNIT (ICU), REMOVAL AND INSTALLATION .
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