Method For Version 2

Method for Version 2

Applies to:
850, 1993
from chassis No. 055932

The seat has been equipped with a new control module. The following procedure must be followed to access the seat diagnostic system:

B1
- Switch off ignition.

B2

A5:

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

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

B3
- Remove fusebox cover screws (four).

B4
- Remove circuit breaker 39 (left-hand seat) or 40 (right-hand seat).

B5
Ignition must be off for at least 5 seconds before performing this step.

- 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.

B6

A6:

- Reinstall circuit breaker 39 or 40 as appropriate. Diagnostic system must now be activated within 1 minute, 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. 1 minute if no activity takes place between module and DLC. Control module will also exit diagnostic function if ignition is switched off for at least 5 seconds. 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.

B7
- Refit fusebox cover on completion of work.