PIAGGIO 500 cc Service Manual page 213

Fuel injection
Disconnect the electrical fan control
electromagnetic switch
Check continuity of the excitation coil.
85 - 86 = 150±50 Ω
YES NO
Replace the electromagnetic switch.
Connect the special tool, 020481Y between the control unit and the fuel injection system (see page 9-8)
Do not connect to the control unit.
Check the presence of battery positive tension at 85
of the electromagnetic switch connector.
85 (white) - 23 = battery tension with ignition set to
"ON".
9
YES NO
Reset or replace the harness.
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