Test results

Check, by carrying out a road test, that the vehicle speed is higher than 40 km/h when the SET- control wheel is adjusted

Go to Step 1

Speed below 40 Km/h

Bring the speed to above 40 Km/h

Check that the Cruise Control system controls are working properly, in particular the "SET- function

End of diagnosis

1.No continuity for lever contacts

2. Incorrect operation of engine management control unit

1.Replace the Cruise Control steering wheel interface assembly

 Op. 5550A10 STALK UNIT ASSEMBLY - R+R

2. Replace the engine management control unit

 Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R

or

 Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R