Parking Brake Actuator: Service and Repair

Electromechanical Parking Brake Actuator

Special tools, testers and auxiliary items required

• Torque Wrench 5-50 Nm (V.A.G 1331)

• Vehicle Diagnostic Tester

Removing

• Ignition on

• Release the parking brake.

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

• Ignition off.

- Raise the vehicle.

- Remove the wheels.

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

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

• Disconnect actuator connector - 1 -.






- Remove both actuator bolts - 1 -.






- Remove the actuator in the direction of the arrow.






- Remove sealing ring with a suitable tool.






• Make sure that ring groove of the seal and contact surface of parking brake actuator do not become damaged.

• 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 brake caliper adjuster screw - 1 - back slightly.






• This makes it easier to install the actuator.

- Position the actuator.

• Make sure that the seal is seated correctly.

- - 2 - Then rotate actuator so bolt hole - a - and threads in brake caliper housing - b - line up.






• Make sure that parking brake actuator is seated flush against the brake caliper.

- Attach both actuator bolts (Torx(R) 30). Tightening specification: 12 Nm.






• Position bolts by hand and screw in a few turns. If threads are damaged, entire brake caliper must be replaced!

• Only insert connector by hand to avoid damaging it.

• Make sure that connectors on vehicle side and actuator side are free of dirt and damage.

- Install connector.

- Mount the wheels.

• After replacing actuator, basic setting 006 must be performed with the vehicle diagnostic tester in the EPB function.

• Use vehicle diagnostic tester.

- then select Basic Setting 006 under "Function".

- Under chassis (Repair Group 01:34-65).

- Brake system (Repair Group 01:45-46).

- 01 - On Board Diagnostic (OBD) capable systems.

- J540 - Electro-Mechanical Parking Brake Control Module.

- J540 - Basic setting (3 electrical parking brake function test).