VESPA GTS Super 125 i.e. Service Station Manual page 143

Vespa GTS Super 125 i.e.
Injection
Check the presence of fixed voltage between the
grey/black cable of the relay base and ground. If
there is none, check the continuity of the grey/
black cable between the fuse box (No. 3 15 A) and
the relay base.
N.B.
CONTINUITY TESTS MUST BE CARRIED OUT WITH THE
COMPONENTS DISCONNECTED. (RELAYS, CONTROL
UNIT, FUSES ETC.).
pump circuit6
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 - 143