PSG16 / P0686 FD

Read the instructions below then start the fault diagnostic procedure.

Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general) Engine shut off. Engine does not start.

P0686 FD

Fault symptom

Fault indicator lamp (for further information see WIS Fault diagnosis, general)

Engine shut off.

Engine does not start.

On-board diagnosis

Type of diagnosis:

Continuous

Enable criteria:

Engine running.

Fault criteria:

The main relay closed too soon 3 consecutive times.

Checking the wiring harness

•	Faults in the control module female connector can be the cause of the DTC. Check the connector with respect to oxidation, depressed pins and pin clamping force.

•	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

Counter is reset during each engine shut-off.

A poor contact or ground connection could cause the control module to experience a break in current.