34 52 516 Removing And Installing/Replacing DSC Control Unit

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 BMW 760Li, 2006 BMW 760i, 2006 BMW 760Li, 2005 BMW 760i, and 2005 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection). Refer to 61 35... NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) .

When Replacing Control Unit:

Carry out programming/coding. Refer to DIAGNOSIS PROGRAMMING/CODING .
Function check, hydraulic unit.

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

NOTE: Not for vehicles with M67.

Fig 1: Identifying Coolant Tank

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation:

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

Lock plug connection (1).

Fig 2: Locating Plug Connection On Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Removing Control Unit From Hydraulic Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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.

Fig 4: Identifying Contact Lugs And Sealing Face

Courtesy of BMW OF NORTH AMERICA, INC.

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

IMPORTANT: Solenoid coils must not be jammed!

Fig 5: Installing Control Unit Onto Hydraulic Unit

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 6: View Of Housing Edge Of Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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, refer to 34 51 1AZ in BRAKES - TIGHTENING TORQUES .

Fig 7: Mounting Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.