| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Keeping the Examiner diagnostic equipment connected to the diagnostic socket, check the operation of the warning light through active diagnosis | Move on to Step 2 | 1.The warning light does not work because the wiring for the serial line and the NQS is interrupted | 1.Renew serial line |
| 2.Instrument panel defective | 2.Replace instrument panel Op. 5560C51 COMBINED ANALOGUE CONTROL PANEL - R+R OR REPLACE |
| 3.Instrument power supply interrupted | 3.Restore correct power supply. |
| 2 | ELECTRICAL CIRCUIT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| Check for the presence of a PWM signal from the engine management node to the instrument panel See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT | Move on to Step 3 | 1.Wiring between turbo sensor and NCM interrupted | 1.Renew the wiring |
| 2.Turbo sensor defective | 2.Replace the supercharging sensor Op. 1060G16 PRESSURE RELIEF SENSOR - R.R. |
| 3.Signal between NCM and NQS interrupted | 3.Restore correct signal. |
| 4.Instrument defective | 4.Replace gauge Op. 5560C51 COMBINED ANALOGUE CONTROL PANEL - R+R OR REPLACE |
| 3 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that the fault is no longer present | End of diagnosis | The fault persists | Replace Body Computer Op. 5505A32 BODY COMPUTER - R.R |
