PIAGGIO 500 cc Service Manual page 177

To control the sensor and related circuit proceed as follows:
Connect the diagnosis tester 020460Y. See page 9-17. Start the engine.
YES
The engine starts normally
Select the "errors" function from the menu. Check for
the presence of anomalies concerning the
"signals panel".
NO
Select the "parameters" function from the menu.
Check the number of
Synchronizations lost = 1 cog
Synchronizations lost = > 1 cog
NO
Indication = 1 - 3
The phase-revolutions
signal conforms
YES
IThe value increases
progressively with
time, insisting with
engine ignition.
Check the circuit and
the sensor.
NO
The engine does not start
Select the "errors" function from the menu.
NO
No anomaly is
revealed.
YES
Fuel injection
YES
Proceed according
to the indication
revealed
9
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