Conditions

Internal Control Module. Malfunction.





Fault symptoms
- Engine stalls.
- CHECK ENGINE.
- Incorrect idle speed.
- Cruise control inoperative.

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. Throttle control already in limp-home mode due to another trouble code.

Fault criteria:
- Current for the throttle motor cannot be completely cut off.

Dependents:
- None.

System reaction to a fault:
- Fuel shut-off. Main relay turned off. Throttle control in limp-home mode. Limp-home solenoid will activate 5 times in succession each time the ignition is turned on until the fault is rectified and the trouble codes cleared.

OK report:
- Accelerator pedal has been depressed at some time and then fully released. 120 s has expired since then without fault criteria being fulfilled.

Fault handling: Fault Handling III, Other Emission-Related Comp. & Function
- CHECK ENGINE goes on immediately and can be turned off only by clearing the trouble codes.

Diagnostic help
Fault diagnosis concerns an internal fault in the control module.