| | Test results |
| 1 | PRELIMINARY CHECK | All OK | Problems encountered | Operation |
|---|
| Press the CITY button repeatedly to check whether the LED in the button changes status | Move on to Step 2 | The LED in the button does not change status | Move on to Step 6 |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|
| Using the Examiner check, in the Body Computer Node ambient, that there are no errors and that the parameter specified varies. | Move on to Step 7 | Impossible to connect to the Body Computer control unit. | Move on to Step 3 |
| Impossible to connect to the Body Computer control unit. | Continue by following the instructions on the diagnostic instrument. |
| Impossible to connect to the Body Computer control unit. | Move on to Step 6 |
| 3 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
|---|
| Check the electricity supply to the Body Computer Node is correct. | Move on to Step 4 | Fault in positive electrical supply and/or earth. | Replace defective component (in the case of a fuse, find out what caused it to blow). |
| 4 | CONNECTIONS CHECK | All OK | Problems encountered | Operation |
|---|
| Check the continuity of the wiring between the CITY button and the Body Computer Node. See See E7045 ELECTRIC STEERING | Move on to Step 5 | Electrical connections not operational. | Renew the damaged electrical connections. |
| 5 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|
| Use an Examiner to check the possibility of connection to the Body Computer Node | Move on to Step 2 | Impossible to connect to the Body Computer control unit. | Replace the Body Computer Node Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R. |
| 6 | CONNECTIONS CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the CITY button is working properly and that the wiring with with the Body Computer Node is correct See Wiring Diagram. See See E7045 ELECTRIC STEERING | Move on to Step 7 | Button faulty | Replace the defective component |
| Electrical wiring not working | Restore the damaged wiring. |
| 7 | CORRECT OPERATION CHECK | All OK | Problems encountered | Operation |
|---|
| Check that the fault is no longer present | End of diagnosis | The fault persists. | Move on to Step 2 |