61 35 278 Removing and refitting (replacing) body domain controller (BDC)
The following points must be strictly observed prior to starting work :
Disconnect HIGH-VOLTAGE SYSTEM from power
Observe SAFETY INFORMATION for handling electric/hybrid vehicles.
Necessary preliminary tasks:
- Clamp off BATTERY LEAD FROM NEGATIVE CONNECTION POINT
- Remove BOTTOM RIGHT INSTRUMENT PANEL TRIM
- Release POWER DISTRIBUTION BOX and set to one side
Unlock plug connections.(1) and disconnect.
Release screw (2) and slide BDC control unit (3) upward slightly.
Tightening torque 61 35 1AZ .
Installation note:
Make sure all plug connections are correctly latched.
Release latch mechanisms (1) and slide BDC control unit (2) upward slightly.
Installation note:
Please ensure correct latching of the BDC control unit.
Unlock the positive battery cable connector:
- Loosen lock (1) in direction of arrow.
- Unlock top positive battery cable connector (2) in direction of arrow.
- Disconnect battery positive lead (2).
Feed BDC control unit out of bracket.
Replacement:
The BDC control unit makes functions available from the former control units FRM (footwell module), CAS (Car Access System), JBE (junction box electronics) and ZGM (central gateway module). After the BDC is replaced, it is therefore necessary to start up the integrated central gateway module (ZGM); during this process, the configuration of the vehicle and the connection in FlexRay is learned in again. An adjustment also needs to be performed on the electronic transmission control (EGS) and electric steering lock (ELV) after the BDC is replaced. In this case, the BDC control unit transfers the individual code to the EGS or ELV. After the BDC is replaced, it is absolutely essential for all ID transmitters (ignition keys) to be re-initialized.
Carry out VEHICLE PROGRAMMING/CODING .
Additionally reset the start inhibit:
- 01 Drive
- Engine start
- Reset the start inhibit