Test results
1
COMPONENT CONCERNED
ELECTRICAL CONNECTIONS CHECK
OK (NO FAULTS DETECTED)
FAULT DETECTED
OPERATION
Connections on relay and engine management control unit
Check for loose connections on the relay and on the engine management control unit
Go to Step 2
Presence of loose electrical connections
Restore the correct connections
2
WIRING CONTINUITY CHECK
Rpm sensor wiring
Check for breaks in the wiring continuity caused by oxidised or corroded terminals
Go to Step 3
Breaks in the continuity of the wiring
Restore the correct continuity for the wiring
3
SENSOR POSITION CHECK
Rpm sensor
Check that the rpm sensor is in the correct position
Go to Step 4
Sensor not positioned correctly
Position the rpm sensor correctly
4
TOOTHED WHEEL CONFORMITY CHECK
Toothed wheel
Check the conformity of the toothed wheel
Go to Step 5
Toothed wheel does not conform
Replace the toothed wheel
5
SENSOR/TOOTHED WHEEL GAP CHECK
Check the gap between the rpm sensor and the toothed wheel
Go to Step 6
Excessive gap between rpm sensor and toothed wheel
Restore correct operation
6
RPM SENSOR OPERATION CHECK
Check that the rpm sensor is working properly
See Test 5510CD RPM SENSOR COIL OPERATION CHECK
See Test 5510CF RPM SIGNAL CHECK
Go to Step 7
The rpm sensor is not working properly
Replace the rpm sensor
Op. 5510C26 ENGINE RPM SENSOR - R+R
7
ENGINE MANAGEMENT CONTROL UNIT OPERATION CHECK
Engine management control unit
Check that the engine management control unit is working correctly
End of diagnosis
Incorrect operation of engine management control unit
Replace the engine management control unit
Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R