| 0 | PRELIMINARY CHECKS | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | With the key ON, turn all the lights on and off from the stalk, i.e.: Using the wheel, side lights/number plate lights
 With the stalk, high beams (both fixed and flashing positions)
 With the stalk, turn signals (right and left) and check they turn on/off
 | Move on to Step 1 | 1. The side lights do not work | 1. Continue as described by the diagnostic equipment | 
| 2. The full beam headlamps do not work | 2. Continue as described by the diagnostic equipment | 
| 3. The turn signals do not operate on both sides | 3. Continue as described by the diagnostic equipment | 
| 4. The direction indicators do not operate on one side | 4. Continue as described by the diagnostic equipment | 
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | Using the Examiner diagnostic equipment check, in Instrument Panel mode, that there are no errors and that the parameters are present. | Move on to Step 2 | Presence of errors | Continue following the instructions on the diagnostic instrument | 
| 2 | ELECTRICAL POWER SUPPLY CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | Check the electricity supply to the Instrument Panel Node is correct. | Move on to Step 3 | Fault in positive electrical supply and/or earth. | Replace defective component (in the case of a fuse, find out what caused it to blow). | 
| 3 | ELECTRICAL CONNECTIONS CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | Check the electrical connections between the Body Computer and the Instrument Panel. In particular, check that each individual pin is properly connected. | Move on to Step 4 | Electrical connections not operational. | Renew the damaged electrical connections. | 
| 4 | ACTIVE DIAGNOSIS CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | With the Examiner in Instrument Panel Node mode, check that the warning lights in question are correctly activated in Active Diagnosis. | Move on to Step 5 | The warning lights do not flash | Replace the Instrument Panel    Op. 5560B10  CONTROL PANEL - R+R | 
| 5 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | Using the Examiner check, in the Body Computer Node mode, that there are no errors and that the parameters are present. | Move on to Step 6 | 1. Impossible to connect to the Body Computer control unit. | 1. Move on to Step 6 | 
| 2. Presence of errors. | 2. Continue by following the instructions on the diagnostic instrument. | 
| 3. The parameters do not change | 3. Move on to Step 8 | 
| 6 | ELECTRICAL POWER SUPPLY CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | Check the electricity supply to the Body Computer Node is correct. | Move on to Step 7 | Fault in positive electrical supply and/or earth. | Replace defective component (in the case of a fuse, find out what caused it to blow). | 
| 7 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | Use an Examiner to check the possibility of connection to the Body Computer Node | Move on to Step 8 | Impossible to connect to the Body Computer control unit. | Replace Body Computer    Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R. | 
| 8 | CORRECT OPERATION CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
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|  | Check that the fault is no longer present | End of diagnosis |  |  |