Fault Conditions

P1640

Main Relay Circuit. No Voltage To Control Module Pin 1.







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:
- Ignition ON

Fault criteria:
- Main relay voltage below 3 V for 1 s.

Dependents:
- None.

System reaction to a fault:
- None.

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

Fault Handling: (For more information refer to "Fault diagnosis, general". Fault Handling III, Other Emission-Related Components and Function)

- Type III.

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

Diagnostic tool functions related to this fault are:
- Main relay voltage, in V.

For more information refer to description of test values under "Fault diagnosis, general". Menu Read Values

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 multimeter, test lamp or diagnostic tool while doing this.