P1670

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE. Cruise control not working. Throttle control may go onto limp-home mode, whereby P1251, P1260 or P1263 may be generated as a secondary fault.

P1670

Fault symptoms

•	CHECK ENGINE.

•	Cruise control not working.

•	Throttle control may go onto limp-home mode, whereby P1251, P1260 or P1263 may be generated as a secondary fault.

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 10V. Output not active.

Fault criteria:

-	Output voltage below 2V for more than 1 s.

Dependents:

-

None.

System reaction to a fault:

-	Cruise control blocked.

OK report:

-	Enable criteria fulfilled and fault criteria not fulfilled within 60 s.

Fault handling: (For more information, see .)

-

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.