VESPA GTV 250 i.e. 2008 Service Station Manual page 171

Vespa GTV 250 i.e.
Injection
Check the presence of fixed voltage between the
grey/black cable of the remote control base and
earth. If there is none check the continuity of the
grey/black cable between the fuse box (No. 3 10
A) and the remote control base.
N.B.
CONTINUITY TESTS MUST BE CARRIED OUT WITH THE
COMPONENTS DISCONNECTED. (RELAYS, CONTROL
UNIT, FUSES ETC.).
pump circuit 6
Check, on switching to "ON", that there is battery
voltage, for about two seconds, to the Black-Green
cable of the pump connector and ground with
pump connector disconnected. Otherwise, check
the continuity of the Black-Green cable between
the pump connector and the remote control base.
Check the efficiency of the ground line of the fuel
pump by measuring the continuity between the
pump connector black cable, system side, and the
ground.
If, when switching to "ON", the pump continues to
turn after two seconds of activation, check, with the
control unit disconnected and the injection load re-
INJEC - 171