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.

Fault criteria 

• Throttle position exceeds the maximum permissible with pedal released.

Dependents 

• None

System reaction to a fault 

• Engine speed is limited to 2200 RPM
• 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:  (For more information, see FAULT HANDLING III, OTHER EMISSION-RELATED COMPONENTS AND FUNCTION ).

• CHECK ENGINE goes on immediately and can be turned off only by clearing the trouble codes.