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PSM / B1770 61

Read the instructions below then start the fault diagnostic procedure.

Symptom: Memory functions not working Engine does not go in the direction of the button but can go in the opposite direction.

  B1770 61


Slide Motor Circuit, Relay Stuck to Ground

Fault symptom

Memory functions not working

Engine does not go in the direction of the button but can go in the opposite direction.

On-board diagnosis

Type of diagnosis:

Immediately after a soft start is completed.

Enable criteria:

When seat operation is permitted.

Fault criteria:

Output voltage exceeds 6 V.

System reaction to a fault:

No memory functions work
Output is switched off, tries however to activate the engine once each time the ignition is switched on.

Checking the wiring harness

Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.

Diagnostic help

Diagnosis regards:

Electrical fault in connecting leads or component.

Functions in the diagnostic tool related to the fault:

Activate:
Motor, Slide Forward
Motor, Slide Rearward
(See also description of readings/activations in diagnostic tool)