Fault Conditions

P1652
Main Relay Coil Circuit. Open / Short to Ground.

Fault symptoms
- Engine fails to start.
- CHECK ENGINE.
- Possible misfiring before DTC is generated.

On-Board Diagnostics
Type of diagnosis:
- Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria:
- Crankshaft rotating. Output not active.

Fault criteria:
- Output voltage below 2V for more than 0.5 S.

Dependents:
- None.

System reaction to a fault:
- None.

OK report:
- Enable criteria fulfilled and fault criteria not fulfilled within 60 S.

Fault handling: See "Fault diagnosis, general" for more information.
- Type III.

Diagnostic help
Fault diagnosis concerns electrical faults in connecting cables or in the relay.

Diagnostic tool functions related to this fault are:
- Activation of output for main relay.

See also the description of activating functions under "Fault diagnosis, general" for more information.

Check the wiring
Jiggle the leads and in-line connectors at various points and in different directions to detect any intermittent breaks or short circuits in the wiring. Observe the multi meter, test lamp or diagnostic tool while doing this.

Proceed to Diagnostic Procedures Checking the Relay Power Supply