PIAGGIO 500 cc Service Manual page 143

Fuel injection
NO
NO
Check efficiency of n°4 5V fuse
YES
NO
Interpose the special tool n° 020481Y between the
Eliminate any short circuit, replace the fuse If
control unit and fuel injection system. See page 9-8
necessary check the decoder and control unit.
Disconnect the main decoder connector and
check the following conditions:
Commutator set to "ON", switch set to RUN, side
stand raised
Terminal n°8= battery positive
Terminal n°4= battery negative
9
YES
Decoder with under-panel feed is correct
NO
YES
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