Gilera Runner Purejet 2007, Workshop Manual, Page: 159 / 257

COMPONENTS LAYOUT:
1 ECU
2 Fuses 15A
3 Air injector
4 Fuel injector
5 H.V. coil
6 Voltage regulator
7 12V - 9Ah battery
A + under panel
B To the magnet flywheel
The air injector is the main component of the electro-pneumatic injection. For convenience, the injector
called air injector even though it actually injects an air and fuel mixture. Direct fuel injection transported
by compressed air allows obtaining a fine nebulisation of the mixture into the cylinder. The ECU controls
the air injector, checking its time and opening. This allows obtaining better results with reference to
polluting emissions and consumption. The ECU self-diagnosis also checks the air injector circuit. Faults
are recognised in case of circuit interruption or short circuit to earth and to positive. Any fault is reported
to the driver by the solid lighting of the injection indicator light. In case of fault, the engine cannot operate.
The fault is only recogtnised when the rpm - phase signal is present. For this reason, in the event of
fault, the storage switches from "current" status to "occurred" status, when the engine stops. To check
the air injector electronic circuit, proceed as follows.
1 - Connect the scooter diagnostic tester. Select "active diagnosis"
GO TO point 2
Runner Purejet
pure jet injection
INJ PJ - 159