| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Connect the Examiner diagnostic equipment and check, in Instrument Panel Node mode, that there are no errors and that the parameters are present. | Move on to Step 6 | 1. Impossible to connect to the NQS | 1. Move on to Step 2 |
| 2. Presence of errors. | 2. Move on to Step 5 |
| 2 | ELECTRICAL POWER SUPPLY CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check the electricity supply to the Instrument Panel Node is correct. See E4010 INSTRUMENT PANEL | Move on to Step 3 | Fault in positive electrical supply and/or earth | Renew and/or replace the defective component (in the case of a fuse, find out what caused it to blow). |
| 3 | CHECK ELECTRICAL CONNECTIONS | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check the electrical wiring/connections of the instrument Panel Node and those between node and steering wheel stalk. Check, in particular, that each pin is correctly connected and inserted in its seat. | Move on to Step 4 | Electrical wiring and/or connections not operating. | Restore damaged wiring and/or electrical connections. |
| 4 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Use an Examiner to check the possibility of connection to the Instrument Panel Node | Move on to Step 5 | Impossible to connect to the control unit. | Replace the instrument panel Op. 5560B10 CONTROL PANEL - R+R |
| 5 | ELECTRICAL CIRCUIT CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check the correct operation of the following components:- Wiring between node and steering wheel stalk
- Control keys, see wiring diagram
See E4010 INSTRUMENT PANEL | Move on to Step 6 | 1. Wiring faulty | 1. Repair wiring. |
| 2. Stalk controls malfunctioning. | 2. Replace the steering column switch unitOp. 5550A12 |
| 6 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that the fault is no longer present | End of diagnosis | | |
