Hydraulic Assembly: Service and Repair

Removing and installing/replacing hydraulic unit for DSC

Note: Read and comply with General Data, refer to Brakes and Traction Control, Description and Operation.

Before removing hydraulic unit, read out control unit fault memory and if necessary, print out diagnostic trouble code.

Installation: On completion, carry out following tasks with Diagnosis and Information System (DIS):

^ Function check, hydraulic unit
^ Coding for new control unit
^ Adjustment of steering angle sensor
^ End-of-tape test for new control unit

Bleeding braking system





Load and block brake pedal with pedal support.





Detach plug connection to control unit.

Detach brake lines.

Caution:
Do not mix up brake lines; if necessary, mark lines prior to removal.
Brake fluid may emerge.

Installation: Pipe connections

(V) from THZ circuit F to hydraulic control unit circuit F (front axle circuit)

(R) from THZ circuit R to hydraulic control unit circuit R (rear axle circuit)

(FR) from hydraulic control unit FR to front right wheel brake

(FL) from hydraulic control unit FL to front left wheel brake

(RR) from hydraulic control unit RR to rear right wheel brake

(RL) from hydraulic control unit RL to rear left wheel brake

Tightening torque, refer to Specifictions.

Unlock plug connection on pressure sensor and detach.

Release screw (1) and remove hydraulic unit.

Installation: Tightening torque, refer to Specifications.





Release screws and convert bracket.

Tightening torque, refer to Specifications.