Gilera 633721 Workshop Manual page 193

Nexus 500 euro 3
- Fuel pump
- HV coil
- Injector
The control unit is provided with a self-diagnosis
system connected to an indicator light in the in-
strument panel.
Failures are detected and restored by the diag-
nostic tester.
In any case, when the fault is no longer present,
the data storage is automatically cleared after 16
cycles of use (cold start, running at regular engine
temperature, stop).
The diagnostic tester is also required to adjust the
idle mixture.
Specific tooling
020460Y Scooter diagnosis and tester
The EMS injection-ignition system has a control
function over the rpm indicator and the radiator
cooling electric fan.
The EMS is connected to the anti-theft immobilizer
system decoder.
In turn, the decoder is connected to a flashing di-
agnostic LED that also serves as deterrent.
The EMS control unit power supply is further con-
trolled by the emergency switch and by the side
stand switch, that is to provide further safety for the
scooter.
Injection
INJEC - 193