Traction Control Module: Service and Repair

34 52 516 - Removing and installing / replacing DSC control unit





Important!
Read and comply with notes on protection against electrostatic damage (ESD protection) 61 35 ... Notes on ESD Protection (Electro Static Discharge).





When replacing control unit:
- Carry out programming/coding Programming and Relearning
- Function check, hydraulic unit





Detach coolant tank (1) and place to one side.

Note:
Not for vehicles with M67.





Unlock plug connection (1) in direction (2) and detach vertically upwards.

Installation Note:
Position plug connection (1) vertically on control unit in order to avoid damaging pins.
Lock plug connection (1).





Release screws (1) and carefully remove control unit (2) from hydraulic unit.

Installation Note:
Replace screws.





Check sealing face (1) for damage (visual inspection).
Clean sealing surface (1). When doing so, do not use tools with sharp edges or aggressive cleaning agents.
Check contact lugs (2) for corrosion or damage.

Note:
Replace hydraulic unit if sealing surface (1) or contact lugs (2) is/are damaged.





Carefully push control unit (1) onto hydraulic unit (2).

Important!
Solenoid coils must not be jammed!





Housing edge of control unit (1) must slide over shoulder on hydraulic unit (2).





Installation Note:
Mount control unit as follows on hydraulic unit:
- Press control unit onto hydraulic unit.
- Insert screws (1) and (2) (do not tighten down) until control unit rests evenly.
- Provisionally fit screws (3...6).
- Tighten down screws (1...6) in specified sequence.
Tightening torque 34 51 1AZ 34 51 Slip Control System (ABS, ASC+T, DSC).