Parking Brake Actuator: Service and Repair

Electromechanical Parking Brake Motor

Special tools, testers and auxiliary items required

• Torque wrench (V.A.G 1331)

• Vehicle Diagnosis, Testing and Information System (VAS 505 x)

Removing

• Ignition on.

• Release parking brake.

• Coding check and reported if necessary.

• DTC memory checked, malfunctions corrected and DTC memory erased.

• Ignition off.

- Raise vehicle.

- Remove wheels.

• Ignition must be switched off for at least 30 seconds when disconnecting connector!

• Clean entire area around connector and actuator/brake caliper.





- Disconnect the connector from the motor.

- Remove the connector from the retainer.





- Remove both bolts form the motor.





- Remove the motor.





- Remove sealing ring with a suitable tool.





• Be careful not to damage the groove on the seal and the contact surface on the motor.

• Do not use any tools with sharp edges.

- Clean ring groove and contact surfaces if dirty. Only use brake cleaner

Installing

- Install new seal.





- Turn the adjusting screw in the brake caliper back a little to make it easier to install the motor.

• This makes it easier to install the actuator.

- - 1 - mount the motor as illustrated.





• Make sure that the seal is seated correctly

- Turn the motor - 2 - so that the hole for the bolt - a - and the thread in the brake caliper housing - b - are covered.





• Make sure the motor is seated flush against the brake housing.

Install the bolts a few turns by hand. If threads are damaged, entire brake caliper must be replaced!

- Tighten the motor bolts to 12 Nm.





- Install the connector for the motor into the retainer.





• Only insert connector by hand to avoid damaging it.

- Connect the connector to the motor.

- Install wheels.

Wheel bolt tightening specifications, refer to => Wheel and Tire Guide Specifications.

- Turn off the ignition and connect the (VAS 505 x) to the 16-pin diagnostic connection.





• Switch on ignition.

• Parking brake released.

• Coding check and reported if necessary.

• DTC memory interrogated, errors shown corrected and DTC memory erased.

- Start the program in Guided Functions.

• Make sure the brakes are working correctly before driving the vehicle for the first time.