Method For Version 3

Method for Version 3

Applies to:
850 from 1994 on

Unlike later 1993 variants, fault tracing or calibration of power seats in the above models can be carried out without removing the fuses.

C1
- Switch off ignition.

C2

A7:

- Manual fault tracing/calibration: Connect test lead from DLC A to socket No. 6 on DLC B.

- Fault tracing/calibration using VST with OBD System Memory Cassette: Connect instrument to DLC B.

C3

C2:

- Press and hold any button on control panel of seat to be tested while switching ignition on. Keep button depressed for at least 1 second after turning ignition on.

C4

C3:

- Diagnostic system must now be activated within 2 minutes, i.e., test button must be pressed once to select DTM 1 (self-diagnostics) or four times to select DTM 4 (calibration).

Control module will exit diagnostic function after approx. 2 minutes if no activity takes place between module and DLC. Module will also exit diagnostic function if ignition is switched off. The seat cannot be operated either with control buttons or memory buttons while using diagnostic system.

Codes for DTM 1 are listed and explained in the table on page 12 of the SM; use of DTM 4 (calibration) is described on SM page 8.