| 1 | PRELIMINARY CHECKS | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | Connect an EXAMINER and check the following on CAN NETWORK INFORMATION:
 No control units with faulty CAN line
 | Move on to Step 2 | 1. Fault on CAN network | 1. Continue following the instructions for the diagnostic equipment | 
| 2. Communication impossible with the Body Computer | 2. Move on to Step 8 | 
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | Keeping the diagnostic equipment connected, check that there are no CAN faults at the BRAKE NODE | Move on to Step 2 | Fault on C-CAN network | Move on to Step 8 | 
| 3 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | 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 4 | Presence of errors | Continue following the instructions on the diagnostic instrument | 
| 4 | ELECTRICAL POWER SUPPLY CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | Check the electricity supply to the Instrument Panel Node is correct. | Move on to Step 5 | Fault in positive electrical supply and/or earth | Replace defective component (in the case of a fuse, find out what caused it to blow). | 
| 5 | CHECK ELECTRICAL CONNECTIONS | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | 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 6 | Electrical connections not operational | Renew the damaged electrical connections | 
| 6 | ACTIVE DIAGNOSIS CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | With the Examiner in the Instrument Panel Node ambient check that the warning lights are correctly activated in Active Diagnosis. | Move on to Step 7 | The warning lights do not flash | Replace the Instrument Panel    Op. 5560B10 CONTROL PANEL - R+R | 
| 7 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | Using an Examiner check, in Body Computer Node mode, that there are no errors. | Move on to Step 10 | 1. Impossible to connect to the Body Computer control unit. | 1. Move on to Step 8 | 
| 2. Presence of errors | 2. Continue by following the instructions on the diagnostic instrument | 
| 8 | ELECTRICAL POWER SUPPLY CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | Check the electricity supply to the Body Computer Node is correct. | Move on to Step 9 | Fault in positive electrical supply and/or earth | Replace defective component (in the case of a fuse, find out what caused it to blow). | 
| 9 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | Use an Examiner to check the possibility of connection to the Body Computer Node | Move on to Step 10 | Impossible to connect to the Body Computer control unit. | Replace Body Computer    Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R. | 
| 10 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION | 
|---|
|  | Check that the fault is no longer present | End of diagnosis |  |  |