PIAGGIO 500 cc Service Manual page 182

Fuel injection
Positive feed conforms.
Check continuity between the pink-black wire of the
connector and pin 20
pink-black-20 = Continuity
NO
Disconnect the connection between the vehicle
System and fuel injection system.
Check continuity of the pink-black wire in the two
systems.
Pink-black (coil connector)-( system connector) =
Continuity
Pink-black (system connector)-20 = Continuity
YES
NO
Check the earthing isolation of the negative wire.
20-23 = Ω infinity (>1MΩ)
Reset or replace the
system concerned.
Repeat the control
using "active diagnosis"
from the menu
YES
NO
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