PIAGGIO 500 cc Service Manual page 157

Fuel injection
Check resistance of the windings in the pump.
Resistance ∼1.5 Ω
NO
Replace the fuse and proceed
Proceed with control of absorbed
with pump control.
current (see page 9-53).
Select the function menu "ACTIVE DIAGNOSIS" of
the diagnosis tester 020460Y.
Select the fuel pump simulation function.
Activate the function with under-panel feed inserted
and engine stopped.
The tester asks the control unit to activate the pump for 30 seconds
Check acoustically the following conditions:
- relay closure
- pump revolution
- relay opening
YES NO
9
The pump receives feed.
Proceed with the pump function-
Check the pump support connector.
ing control
YES
NO
Replace the pump
Reset
see page 9-54.
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