Parking Brake Actuator: Service and Repair

Electro-Mechanical Parking Brake Actuator

Special tools, testers and auxiliary items required

• Torque Wrench (V.A.G 1331)

• Vehicle Diagnosis, Testing And Information System (VAS 5051B) or (VAS 5052)

Removing

• Ignition on

• Release parking brake

• Coding check and reported if necessary.

• DTC memory interrogated, errors shown 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 actuator connector - 1 -.





- Remove both screws - 1 - from the actuator.





- Remove actuator in direction of 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 brake caliper adjuster screw back a bit.





• This makes it easier to install the actuator.

- Item - 1 - Position actuator as shown

• Make sure that seal is seated correctly

- Item - 2 - Then rotate actuator so bolt hole - a - and threads in brake caliper housing - b - are brought into alignment.





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

- Install both screws on the actuator. 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.

After replacing actuator, basic setting 10 must be performed with the vehicle diagnostic tester in the EPB function.

Use the vehicle diagnosis, testing and information system (VAS 5051B) or (VAS 5052).

- then select basic section 10 under "Function". Refer to=> [ Vehicle Diagnostic, Testing and Information System, Connecting and Selecting Function ] Testing and Inspection. or

- under chassis (Rep. Gr. 01:34-65)

- Brake system (Rep. Gr. 01:45-46)

- 01- On Board Diagnostic (OBD) capable systems

- 53 - Parking brake

- J540 - Electro-Mechanical Parking Brake Control Module

- J540 - Basic setting (3 Electromechanical parking brake function test)