Connect the diagnostic equipment (Examiner or Examiner Plus) to the diagnostic socket and check:

• That there are no faults in the instrument panel;

• That there are no faults in the I.E. control unit

Move on to Step 2

Presence of faults in the instrument panel; presence of faults in the Engine Management Control Unit

Continue following the instructions for the diagnostic equipment

Keeping the diagnostic equipment (Examiner or Examiner Plus) connected to the diagnostic socket, check the operation of the warning light in active diagnosis.

Move on to Step 3

1.Warning light does not work

1.Panel defective: replace the instrument panel

 Op. 5560B10 CONTROL PANEL - R+R

2.Warning light working - pressure sensor defective

2.Replace the pressure sensor

 Op. 1084A42 ENGINE OIL PRESSURE WARNING LIGHT SWITCH - R.R.

3. Pressure sensor wiring defective

3.Restore the wiring

Check that the fault is no longer present

End of diagnosis

Fault persists

Replace the Body Computer and move on to Step 4

 Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.

Check that the fault is no longer present

End of diagnosis

Fault persists

Replace the Engine Management Control Unit

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

Check that the fault is no longer present

End of diagnosis

Fault persists

Replace the Engine Management Control Unit

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