Volvo Workshop Manuals
940 L4-2.3L SOHC VIN 88 B230F (1992)
Relays and Modules > Relays and Modules - Body and Frame > Power Seat Control Module > Component Information > Technical Service Bulletins > Power Seat - Fault Tracing/Calibration > Page 65
Power seats in the above models can be operated only with the ignition on.
Switch off ignition
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.
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
Diagnostic system must now be activated within one minute, i.e., test button must be pressed once to select DTM 1 (self-diagnostics) or four times to
Control module will exit diagnostic function after approx. 1 minute if no activity takes place between module and DLC. Module will also exit diagnostic
Codes for DTM 1 are listed and explained in the table on page 9 of the SM; use of DTM 4 (calibration) is described on SM page 7.
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