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PSM / B1820 08

Read the instructions below then start the fault diagnostic procedure.

Symptom: The button is considered inactive until it is released and activated again. The engine can temporarily go in the opposite direction

  B1820 08


Switch, Backrest Layback Circuit, Signal Invalid

Fault symptom

The button is considered inactive until it is released and activated again.

The engine can temporarily go in the opposite direction

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

When seat operation is permitted.

Fault criteria:

Backrest back button has stuck (been active for more than 60 s). Alternatively, backrest forward button and backrest back button are both active.

System reaction to a fault:

The button is considered inactive until it is released and activated again.
The engine can temporarily go in the opposite direction

Diagnostic help

Diagnosis regards:

Detecting an electrical or mechanical fault on the button.

Functions in the diagnostic tool related to the fault:

Test value:
Motor, Seat Back Forward
Motor, Seat Back Rearward
(See also description of readings/activations in diagnostic tool)