| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Connect the Examiner diagnostic instrument to CAN information network.- Check for faulty control units.Check B-CAN and C-CAN network continuity. | Move on to Step 2. | 1. Control unit faulty2. C-CAN line interrupted.3. B-CAN line interrupted | 1. Continue following the instructions given by the diagnostic equipment.2. Restore the correct continuity.3. Restore the correct continuity. |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| Connect the Examiner diagnostic equipment to the engine management control unit and check:- that there are no faults.- parameter plausibility. | Move on to Step 3. | 1. Error detected at the engine management control unit.2. Parameters not plausible. | 1. Continue following the instructions given by the diagnostic equipment.2. Continue following the instructions given by the diagnostic equipment. |
| 3 | 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 engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R |
