| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | 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 2 | 1. Warning light does not work | 1. Panel defective: replace instrument panel    Op. 5560B10  CONTROL PANEL - R+R | 
| 2. Warning light operational - pressure sensor defective | 2. Replace pressure sensor    Op. 1084A40 ENGINE OIL LEVEL SENSOR - R + R | 
| 3. Pressure sensor wiring defective | 3.Renew the correct wiring | 
| 2 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | Check that the fault is no longer present | End of diagnosis | Fault persists | Replace the Body Computer and continue to Step 4    Op. 5505A32  BODY COMPUTER - R.R | 
| 3 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | 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 | 
| 3 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | 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 |