Description of On-Board Diagnostic System

Notes on the BMW DIAGNOSTIC SYSTEM:

After selection of the SM/SPM diagnostic program, the system assumes a fixed diagnostic mode. It is not possible to adjust the seat and mirror positions by means of the adjustment switches and it is also not possible to store/call stored positions in diagnostic mode. A defect code is not stored.

Diagnostic mode is terminated by returning from the SM/SPM program to the overview of control units. The control unit can only store defects which occur during automatic adjustment (memory mode). Defects which occur during manual operation (adjustment with the control buttons) are not stored. After the automatic procedure and detection of a fault, the corresponding defect code is not stored before the control unit assumes its rest status.

The following defect codes can be detected and stored by the control unit (defect code memory):

- Adjustment drives faulty
- Potentiometer faulty
- Drive or potentiometer incorrectly connected
- ROM defective
- Short to ground of the memory switch

Troubleshooting:

Notes:

- Troubleshooting with BMW diagnostic system
- Battery charged, U-min = 12 V
- Only remove and install the control unit with the ignition switched off
- In diagnostic mode, manual adjustments, storage and calling of settings (memory mode) and defect code storage are not possible.