| 1 | ACTIVE DIAGNOSIS CHECK | All OK | Problems encountered | Operation |
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| With the Examiner in Instrument Panel Node mode, check that the vehicle protection warning light activates correctly in Active Diagnosis. | Move on to Step 2 | The warning light does not flash. | Replace the Instrument Panel Op. 5560B10 CONTROL PANEL - R+R |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Keeping the diagnostic instrument connected, check the Engine Control Node for the absence of:- System/component faults;- Faults in the CAN network/s. | Move on to Step 3 | 1. System / components fault.2. Presence of errors. | 1. Replace the system/component that is faulty.2. Continue following the instructions given by the diagnostic equipment. |
| 3 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
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| Check that the node power supply is correct.Check the wiring between the Body Computer and the NCM. In particular, check that each individual pin is properly connected. | End of diagnosis. | 1. Fault in positive electrical supply and/or earth.2. Electrical connections not operational. | 1. Replace defective component (in the case of a fuse, find out what caused it to blow).2. Restore the correct operation of the wiring. |
