Audi Workshop Service and Repair Manuals

Removing and installing actuator motor for electronic parking brake and handbrake Special tools and workshop equipment required

t  Torque wrench -V.A.G 1331-

t  Vehicle diagnosis and service information system -VAS 5051B- or -VAS 5052- Removing   Note t  Ignition on t  Parking brake released t  Fault memory interrogated, indicated faults eliminated and fault memory erased. t  Ignition off –  Raise the vehicle. –  Remove wheels.   Note t  Ignition must be switched off at least 30 sec. before unplugging connector. t  Clean whole area around connector and actuator motor/ brake caliper.

t  Unplug connector -1- of actuator motor.

–  Unscrew both securing bolts -1- on actuator motor.

–  Detach actuator motor in direction of arrow.

–  Remove seal with suitable tool. Make sure you do not damage annular groove for seal and contact surface on actuator motor.   Note Do not use tools with sharp edges. –  If necessary clean annular groove and contact surface. Use only brake cleaner. Installing –  Fit new seal.

–  Turn adjusting screw -1- on brake caliper back slightly.   Note This makes it easier to install the actuator motor. –  Fit actuator motor.   Note Ensure that seal is fitted correctly.

–  Then turn actuator motor in such a way (item -2-) that bolt hole -a- and thread in brake caliper housing -b- are aligned. Make sure that the actuator motor is flush with the brake caliper housing.

–  Fit both securing bolts (Torx 30) of actuator motor. Tightening torque: 12 Nm. Important: Bolts must be fitted and screwed in several turns by hand. If the thread is damaged the complete brake caliper has to be renewed.   Note t  To avoid any damage to connector only fit it by hand. t  Make sure that the connections on vehicle wiring and actuator motor are clean and undamaged. –  Fit connector. –  Fit wheels → Wheels and tyres; Rep. gr.44. After renewing actuator motor you must use vehicle diagnostic tester to perform basic setting 006 in EPB function. To do so, use the vehicle diagnosis, testing and information system -VAS 5051B- or -VAS 5052-. –  Then select Basic setting 006 under „Function“ –  under Running gear (repair group 01: 34-65) –  Brake system (repair group 01: 45-46) –  01 - Self-diagnosis compatible systems –  J540- Control unit for electromechanical parking brake –  J540- Basic setting (3 Function test: electronic parking brake and handbrake)