SIGNAL NOT VALID
Test results
1
ELECTRICAL CONNECTIONS CHECK
All OK
Problems encountered
Operation
Check for loose connections at the relay and at the engine management control unit.
Go to Step 2
Presence of loose electrical connections.
Restore the correct connections.
2
WIRING CONTINUITY CHECK
Check for breaks in the wiring continuity caused by oxidised or corroded terminals
See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
Go to Step 3
Breaks in the wiring continuity.
Restore the correct continuity for the wiring.
3
SENSOR POSITION CHECK
Check that the rpm sensor is in the correct position
Go to Step 4
Sensor not in the correct position
Place the rpm sensor in the correct position.
4
PHONIC WHEEL CONFORMITY CHECK
Check the conformity of the phonic wheel
Go to Step 5
Phonic wheel does not conform
Replace the phonic wheel.
5
SENSOR/PHONIC WHEEL GAP CHECK
Check the gap between the rpm sensor and the phonic wheel.
Go to Step 6
Excessive gap between rpm sensor and phonic wheel
Restore correct operation.
6
RPM SENSOR OPERATION CHECK
Check that the rpm sensor is working properly by carrying out the
See Test 5510CD RPM SENSOR COIL OPERATION CHECK
and the
See Test 5510CF RPM SIGNAL CHECK
Go to Step 7
Rpm sensor not working properly.
Replace the rpm sensor
Op. 5510C26 ENGINE RPM SENSOR - R+R
7
ENGINE MANAGEMENT CONTROL UNIT OPERATION CHECK
Check that the engine management control unit is working properly.
End of diagnosis
Engine management control unit faulty.
Replace the engine management control unit
Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R