Central Locking System Control Unit - Improved
Group 51Body Equipment
Bulletin Number
51 01 83 (699)
Montvale, NJ
March, 1983
Technical Dept.
Subject:
CENTRAL LOCKING SYSTEM - ELECTRONIC CONTROL UNIT
Models:
528e (E28), 630/633CSi (E24), 733i (E23)
The electronic control unit with integrated impact switch has been modified and improved on vehicles with the central locking system.
An unintentional blowing of the fuse in the electronic control unit is no longer possible.
New control units (2) for E23/E24 are available under Part Number 61 31 1 373 323 and should be installed when complaints are received.
Old F and S control units (1), BMW P/N 61 31 1 367 873 can be used up for E23/E24 models but should no longer be ordered.
The revised control units for E28 (Part Number remains unchanged) from the Kierkert company are marked with a yellow or green paint dot below the inscription on the front. "Kierkert" control units with BMW P/N 61 31 1 369 818 which are not marked with a yellow or green paint dot should be returned through the usual channels until May 1, 1983, indicating Special Defect Code 00 00 51 26 00 on a collective warranty claim.
IMPORTANT:
Switch on the ignition only with the control unit in installed position when working on the electric system, as otherwise it will be destroyed. Also, see note on control unit.
It has occurred on some E23 cars that when operating the rear lid lock or when slamming the rear lid shut, the central locking system locked itself.
In such cases, check the adjustment of the luggage compartment operating motor. If it proves insufficient to adjust the distance by the slots provided, increase the slots so that the luggage compartment operating motor can be properly adjusted.