P0686

P0686 00

Main Relay Coil Circuit. Open / Short to Ground.







Fault symptom
- Check Engine
- Engine does not start.
- Engine stops.

On-board diagnosis

Type of diagnosis:
- Continuous

Enable criteria:
- Crankshaft rotating.
- Output is not active.
- Diagnosis is carried out when the engine is switched off with the ignition key.

Fault criteria:
- When voltage on the output is below 2.0 V for more than 1 s.

Dependent:
- None

System reaction to a fault:
- None

OK report:
- Fault criteria NOT fulfilled during 60 s with engine running.

Fault handling:
Type III
(See section Fault handling III, "Other emission-related components and functions" for more information.)

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:

Activation:
- Main Relay
(See also description of readings/activations in diagnostic tool)