PIAGGIO 500 cc Service Manual page 155

Fuel injection
Disconnect the vehicle system- fuel injection system
connection.
23 - black - violet (vehicle system) = battery tension
NO
YES
Check the connector and the
Check continuity of the vehicle harness and continuity
harness injection side
of the relay coil. Relay control:
85 - 86 = 100 ± 50Ω
9
Check the efficiency of 10 A fuse n° 2
NO YES
9 - 43