Gilera Nexus 500 Workshop Manual page 262

Injection
The coil magnetisation time is controlled by the
control unit. The ignition power is increased during
the engine start-up.
The injection system recognises the 4-stroke cycle
and therefore, ignition is only controlled during
compression.
To check the ignition circuit, proceed as follows:
1 - Connect the diagnostic tester. Select the menu
on the "ACTIVE DIAGNOSIS" function. Start the
HV coil check with switch set to "ON", switch to
"RUN" and side stand raised. Wait for the tester to
display: "TEST SUCCESSFUL"
YES go to 3 NO go to 2
Specific tooling
020460Y Scooter diagnosis and tester
2 - The tester displays: "TEST FAILED". Repeat the test and wait for the tester to display: "TEST SUC-
CESSFUL"
YES go to 3 NO go to 4
3 - Select the menu on the "ERRORS" function. Check the presence of current or stored errors relating
to the H.V. coil.
YES go to 6 NO go to 5
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).
INJEC - 70
Nexus 500