PIAGGIO Beverly 500 i.e. Workshop Manual page 231

Beverly 500 i.e.
4 - Test failed
YES go to 6
5 - The coil control circuit is efficient.
Check the H.V. coil secondary, the cable and the screened cap
6 - Install the special tool between the injection system and the control unit.
Measure voltage between pins 20 and 23 of the specific
Specific during the timing phase of the fuel pump.
To start the timing, set the switch to "ON" with switch to "RUN" and side stand raised.
Electric characteristic
20-23 =
Battery voltage (coupled to the pump rotation -2 seconds).
If you want to increase the test time, enable the
"pump relay diagnosis" function
(30 seconds)
YES go to 7 NO go to 8
7 - The coil primary control circuit is efficient.
Carefully check the connectors to the control unit and to the coil.
Replace the control unit, if necessary.
8 - Disconnect the connector to the HV coil primary.
Repeat the voltage check between the black-green wire and earth.
Electric characteristic
Black-green-23 =
battery voltage
(coupled to the pump rotation-2 seconds).
YES go to 10 NO go to 9
9 - Check the black-green wire continuity.
Repair or replace the cable harness.
Injection
INJEC - 231