Fault Conditions

P1671

Relay of limp-home function, short circuit to B+







NOTE: The relay/electrical circuit that activates the throttle's limp-home function is faulty.

Fault symptoms
- CHECK ENGINE.

On-Board Diagnostics

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

Enable criteria
- Engine running. Main relay voltage exceeding 10 V. Output is active.

Fault criteria
- Output voltage exceeding 2 V for more than 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, Fault Handling III, Other Emission-Related Components and Function)

- Type III.

Diagnostic help
Fault diagnosis concerns electrical fault in connecting leads or in the relay.

Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.

Proceed to Diagnostic Procedures Checking the Relay Power Supply