PIAGGIO NRG POWER PUREJET, Руководство по ремонту, Страница: 178 / 248

petrol injection has finished. The operation of the petrol injector is always very important in all engine
operating phases, but particularly during idling and starting. The ECU autodiagnosis also checks the
petrol injector control 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, i.e. when the
ECU controls opening of the injector. For this reason when there is a fault, recognition changes from
the «current event» state to «past event» state when the engine stops.
1 - Connect the scooter tester. Select the enable diagnosis function.
GO TO point 2
Specific tooling
020460Y Scooter diagnosis and tester
2- Activate the fuel injector diagnostic. Listen for 5 fuel injector activations. Check the diagnostic tester
response.
YES point 3 NO point 4 NO point 5
3- The fuel injector was activated 5 times and the tester returned the «test completed successfully»
outcome. The fuel injector and the relative circuit are efficient. For further certainty, proceed with the
auto-diagnostic test in order to avoid any errors in the stored status.
4- The injector remained inactive and the tester returned the outcome «test failed». Repeat the diag-
nostic and replace the ECU if necessary.
5- The fuel injector remained inactive and the tester returned the «test completed successfully» out-
come. Check the fuel injector circuit.
6- Connect the scooter diagnostic tester. Select the «errors» function on the menu. Check the presence
of any errors PO251 FUEL INJECTOR .
YES point 8 YES point 9 NO point 7
Specific tooling
020460Y Scooter diagnosis and tester
7- No error present. The injector electric part is sufficient. Proceed with the injector hydraulic inspections.
8- Fuel injector error in current status. Check the fuel injector circuit.
9- Fuel injector error in occurred or stored status. Check the injector circuit with special attention to false
contacts of uncertain insulation.
pure jet injection
NRG Power Purejet
INJ PJ - 62