| | Test results |
| 1 | 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;- no control units with faulty CAN | Move on to Step 2 | 1. Fault on CAN network2. Communication impossible with the Body Computer | 1. Continue following the instructions for the diagnostic equipment2. Move on to Step 7 |
| 2 | SWITCH CHECK | All OK | Problems encountered | Operation |
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| Check the correct operation of the seat belt unfastened warning light switch | Move on to Step 3 | Switch not operating | Replace the lower branch of the belt Op. 7065A14 ANCHORAGE ROD FOR , (ONE), FRONT SEAT BELT LEFT OR RIGHT - R.R. |
| 3 | PASSENGER PRESENCE SENSOR CONNECTIONS CHECK | All OK | Problems encountered | Operation |
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| Check that the seat connection is properly inserted in the floor connection | Move on to Step 4 | Passenger presence sensor connector detached from the connection on the vehicle floor | Fit the seat connector correctly with the vehicle floor connector. |
| 4 | WIRING BREAK CHECK | All OK | Problems encountered | Operation |
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| Check for any breaks/tears in the wiring/device using the specific tester | Move on to Step 5 | Presence of cuts/tears in the connecting cables and break in the printed circuit | Passenger presence sensor replacement Op. 7065A34 PASSENGER PRESENCE SENSOR ON FRONT SEAT FOR INDICATING SEATBELT UNFASTENED R R |
| 5 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Keep the diagnostic tester connected and check for CAN faults in the AIR BAG NODE | Move on to Step 6 | 1. Fault on B-CAN network2. Air bag control unit defective | 1. Move on to Step 112. Replace the Air Bag control unit Op. 5580C14 AIR BAG ECU - R+R |
| 6 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Using an Examiner check, in Instrument Panel mode, that there are no errors and that the parameters are present | Move on to Step 7 | Presence of errors | Continue following the instructions on the diagnostic instrument |
| 7 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
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| Check the electricity supply to the Instrument Panel Node is correct | Move on to Step 8 | Fault in positive electrical supply and/or earth | Replace defective component (in the case of a fuse, find out what caused it to blow) |
| 8 | CHECK ELECTRICAL CONNECTIONS | All OK | Problems encountered | Operation |
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| Check the wiring between the Body Computer and the Instrument Panel. In particular, check that each individual pin is properly connected | Move on to Step 9 | Electrical connections not operational | Renew the damaged electrical connections |
| 9 | ACTIVE DIAGNOSIS CHECK | All OK | Problems encountered | Operation |
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| With the Examiner in Instrument Panel Node mode check that the seat belt unfastened warning light is correctly activated in Active Diagnosis. | Move on to Step 10 | The seat belt warning light does not come on correctly | Replace the Instrument Panel Op. 5560B10 CONTROL PANEL - R+R |
| 10 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Using the Examiner diagnostic equipment in Body Computer Node mode that there are no errors and that the seat belt status has changed | End of diagnosis | 1. Impossible to connect to the Body Computer control unit.2. Presence of errors3. The parameters do not change | 1. Move on to Step 112. Continue by following the instructions on the diagnostic instrument3. Move on to Step 11 |
| 11 | 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 12 | Fault in positive electrical supply and/or earth | Replace defective component (in the case of a fuse, find out what caused it to blow) |
| 12 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|
| Use an Examiner to check the possibility of connection to the Body Computer Node | End of diagnosis | Impossible to connect to the Body Computer control unit. | Replace Body Computer Op. 5505A32 BODY COMPUTER - R.R |
