T8 / P0686 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Engine does not start.
Engine stops.
Main Relay Coil Circuit. Open / Short to Ground.
Fault symptom
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Engine does not start.
Engine stops.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| 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:
System reaction to a fault:
OK report:
| Fault criteria NOT fulfilled during 60 s with engine running. |
Fault handling:
| (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:
| (See also description of readings/activations in diagnostic tool) |
