| 1 | CAN CONTROL UNITS FAULT DIAGNOSIS | All OK | Problems encountered | Operation |
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| Carry out a fault diagnosis using the Examiner on the CAN control units to check for the presence of errors at the NBC - NPL | Move on to Step 2 1 | - Presence of errors at CAN control units
- Errors present in the Body Computer
| - Resolve the problem for the control unit where the error is present and continue to step 2
- Resolve the problem for the body computer and continue to step 2
|
| 2 | CAN IMPEDANCE CHECK | All OK | Problems encountered | Operation |
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| Check the network impedence is correct See Test 5505OA CAN LINE C CHECK | Move on to Step 4 1 | CAN fault | Move on to Step 3 1 |
| 3 | SUPPLY CHECK | All OK | Problems encountered | Operation |
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| Check the Body Computer power supply | Move on to Step 4 1 | Body Computer power supply failure | Move on to Step 6 1 |
| 4 | CHECK USING THE EXAMINER | All OK | Problems encountered | Operation |
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| Check that error U1701 (NCM missing) and that error U1717 (NGE missing) are not also present in the ABS control unit with the counter equal to or close to the reading for U1700 (NBC missing) | Move on to Step 5 1 | Error U1717 present in the ABS control unit | Proceed as instructed for error U1717 |
| 5 | ELECTRICAL CHECKS | All OK | Problems encountered | Operation |
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| Check the continuity of the wiring for the CAN between the NGE and NBC | Move on to Step 6 1 | Wiring faulty | Restore the correct connection between the NGE and NPL NBC Move on to Step 6 |
| 6 | CHECK ON CORRECT OPERATION | All OK | Problems encountered | Operation |
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| Delete the errors using the diagnostic equipment.Carry out a road test See Test 3350EA ESP SYSTEM ACTUATION CHECKto ensure that the control unit checks whether there are any errors still present.Return to the workshop and check that the fault is no longer present using the diagnostic equipment | End of diagnosis | | |
