PIAGGIO 500 cc Service Manual page 149

Fuel injection
Interpose special tool 020481Y between the control unit and the fuel injection system (see page 9-8).
Key switch set to "ON".
Side stand raised.
Emergency switch set to "RUN".
Wait for more than 5 seconds.
15 - 23 = battery tension
YES
Check the control unit connector
Check the control unit
NO
Check the connector between the fuel injection system
and the vehicle system.
Check continuity of the brown-black (1/12) wire:
digital instrument (1-2) - connector
connector - PIN15 control unit
9
The fuel injection control unit therefore manages the indicator negative. The indicator should turn itself off after the
initial check.
The indicator lights up again as soon as the control unit self-diagnosis reveals an anomaly.
When the anomaly disappears, the indicator turns itself off again; however, it is necessary to proceed with related
function controls.
The indicator may light up independently of engine functioning.
9 - 37