On-Board Diagnostics

Type of diagnosis: 

• Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria 

• Crankshaft rotating and main relay voltage exceeding 10V.

Fault criteria 

• Throttle motor receiving 100% PWM in open direction but there is no current reaching the motor.

Dependents 

• None

System reaction to a fault 

• Throttle control goes into limp-home mode. The limp-home solenoid will be activated 5 times in succession each time the ignition is turned on until the fault has been 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.