| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
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| Connect an EXAMINER and check the following on CAN NETWORK INFORMATION:- No control units inactive;- No faulty control units;- that there are no control units with faulty CAN. | Move on to Step 1 | 1. Fault on CAN network.2. Communication with the Body Computer impossible. | 1. Continue following the instructions given by the diagnostic equipment.2. Move on to Step 5 |
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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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 4 | 1. Presence of errors.2. Impossible to initiate communication with the instrument panel. | 1. Continue by following the instructions on the diagnostic equipment.2. Move on to Step 2 |
| 2 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
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| Check the electricity supply to the Instrument Panel Node is correct. See E4010 INSTRUMENT PANEL | 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 | Operation |
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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 correct connections. |
| 4 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Using an Examiner, check in Body Computer Node mode that there are no errors. | Move on to Step 7 | 1. Impossible to connect to the Body Computer control unit.2. Presence of errors. | 1. Move on to Step 52. Continue by following the instructions on the diagnostic instrument. |
| 5 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
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| Check the electricity supply to the Body Computer Node is correct. | Move on to Step 6 | Fault in positive electrical supply and/or earth. | Replace defective component (in the case of a fuse, find out what caused it to blow). |
| 6 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Use an Examiner to check the possibility of connection to the Body Computer Node | Move on to Step 7 | Impossible to connect to the Body Computer control unit. | Replace Body Computer Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R. |
| 7 | 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 the Instrument Panel Op. 5560B10 CONTROL PANEL - R+R |
