| | Results of the tests |
| 1 | PRELIMINARY CHECK | All OK | Problems met | Operation |
|---|
| Press the CITY button repeatedly to check whether the LED in the button changes state. | Continue to Step 2 | The LED in the button does not change state. | Continue to Step 6 |
| 2 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
|---|
| Using the Examiner, check, in the Body Computer Node ambient, that there are no errors and the CITY button status varies | Continue to Step 7 | Impossible to connect with the Body Computer control unit | Continue to Step 3 |
| There are errors | Continue in accordance with the instructions for the diagnostic equipment |
| The parameter values do not change | Continue to Step 6 |
| 3 | ELECTRIC POWER SUPPLY CHECK | All OK | Problems met | Operation |
|---|
| Check that the Body Computer Node electrical power supply is correct | Continue to Step 4 | Positive and/or earth electrical power supply faulty | Replace the component involved (if a fuse is involved, search for the cause of the problem) |
| 4 | CHECK ON CONNECTIONS | All OK | Problems met | Operation |
|---|
| Check the continuity of the wiring between the CITY button and the Body Computer Node See E7045 ELECTRIC STEERING | Continue to Step 5 | Electrical connections not working | Restore damaged electrical connections. |
| 5 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
|---|
| Using the Examiner, check the possibility of connecting with the Body Computer Node | Continue to Step 2 | Impossible to connect with the Body Computer control unit | Replace the Body Computer Node Op. 5505A32 |
| 6 | CHECK ON CONNECTIONS | All OK | Problems met | Operation |
|---|
| Check that the CITY button and wiring with the Body Computer Node are working properly See E7045 ELECTRIC STEERING | Continue to Step 7 | Button faulty | Replace faulty component |
| Electrical wiring not working | Renew the damaged wiring. |
| 7 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
|---|
| Check that the fault is no longer present | End of diagnosis | The fault persists | Continue to Step 2 |