Alarm Module: Service and Repair

61 35 910 - Removing and installing/replacing control unit of electronic immobilizer





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





Necessary preliminary tasks:
- Disconnect battery negative lead Disconnecting and Connecting Battery Negative Lead
- Remove trim panel for pedal assembly 51 45 185 Removing and Installing/Replacing Panel For Pedals





Unfasten plug connection (1) and disconnect.

Note:
Secure control unit of electronic immobilizer (3) against falling out.

Release screws (2) and remove control unit of electronic immobilizer (3).





Replacement:

Important!
Check hardware version of old control unit.
Part numbers of control units with hardware version HW03:
- 61 35 8 374 957
- 61 35 6 905 666
- 61 35 6 905 667
- 61 35 6 905 670
If hardware version HW03 was fitted, observe the following.





Disconnect cable from pin 3 of plug (follow instructions for opening and disconnecting 61 13 ... Opening Plug Housings and Removing Contacts of Different Plug Systems).
Replace double flat spring contact with a larger one.
Connect cable to pin 2 of plug.





Carry out programming/coding Programming and Relearning.