PIAGGIO 500 cc Service Manual page 147

Fuel injection
Check the following conditions:
diagnosis socket - 10 control unit = continuity
diagnosis socket - 23 control unit = earthed
continuity
diagnosis socket - 9 control unit = continuity
10 - 23 = isolation (> 1MΩ)
9 - 23 = isolation (> 1MΩ)
YES NO
The circuit functions correctly
Disconnect the connection between the fuel injec-
tion system and the vehicle system.
Repeat controls in the two system sections.
Check the control unit
Repair any interruptions or short circuits
9
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