PIAGGIO NRG Power Purejet Workshop Manual page 168

pure jet injection
the air injector circuit. A fault is detected if the circuit is interrupted or if there is a short towards the earth
or positive. Any faults are signalled to the driver via the injection lamp. If a fault is present the engine
will not run. The fault is only recognised when the rpm - timing sensor is present. For this reason when
there is a fault memorisation changes from the "current event" state to "past event" state when the
engine stops. To check the air injector electrical circuit, proceed as follows.
1 - Connect the scooter tester. Select the "enable diagnosis" function.
GO TO point 2
Specific tooling
020460Y Scooter diagnosis and tester
2- Enable the air injector diagnostic. Check the 5 sounds that denote the air injector activation. Check
the tester response.
YES point 3 NO point 4 NO point 5
3- The air injector has enabled 5 times and the tester has returned "test finished successfully". The air
injector and relevant circuit are currently efficient. For greater certainty, continue with the auto-diag-
nostic check in order to highlight stored errors.
4- The injector has not been enabled and the tester has returned "test failed". Repeat the diagnostic
and, if necessary, replace the ECU.
GO TO point 2
5- The air injector has not been enabled and the tester has returned «test finished successfully». Check
the air injector circuit.
6- Connect the scooter diagnostic tester Select the «errors» function. Check the presence of error
P1160 AIR INJECTOR.
GO TO point 7
YES point 8 YES point 9
Specific tooling
020460Y Scooter diagnosis and tester
7- No error present. The injector electrics are efficient. Check the compressed air circuit to inspect the
injector seal.
8- Air injector error in current status. Check the air injector circuit.
9- Air injector error in stored status. Check the circuit for false contacts or uncertain insulation.
10- Connect the interface wiring. Omit the connection to the ECU. Disconnect the air injector connector.
GO TO point 11
Specific tooling
020481Y Control unit interface wiring
INJ PJ - 52
NRG Power Purejet