| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Connect the Examiner and check the following at the Body Computer Node:- that there are no errors;- the plausibility of the Rear Fog Lamps On/Off parameter. | Move on to Step 2 | 1. Presence of errors.2. The fog lights on/off parameter does not change. | 1. Continue following the instructions given by the diagnostic equipment.2. Move on to Step 5 |
| 2 | CHECK ON OPERATION OF REAR FOG LAMPS | All OK | Problems encountered | Operation |
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| Check that the rear fog lamps are working properly and check the operation of the wiring. | Move on to Step 3 | Lamp not working. | Replace the rear fog lamp Op. 5540A52 BULB FOR ONE SIDE LIGHT OR REAR FOG LAMP IN REAR LIGHT CLUSTER, LEFT OR RIGHT - R.R. |
| 3 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Keeping the diagnostic equipment connected, check in active diagnosis that the rear fog lamps are working properly. | Move on to Step 5 | Rear fog lamps not working. | Move on to Step 4 |
| 4 | BODY COMPUTER CONNECTION CHECK | All OK | Problems encountered | Operation |
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| Check for deformed terminals or connections not present on the Body Computer. | Move on to Step 5 | Missing connections/pins bent. | Renew the correct connections |
| 5 | CORRECT OPERATION CHECK | All OK | Problems encountered | Operation |
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| Check that the fault is no longer present. | End of diagnosis. | The fault persists. | Replace Body Computer Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R. |