VESPA GTS Super 125 i.e. Service Station Manual page 166

Injection
Check the resistance of the primary coil between
pin 22 of the interface wiring and the green black
cable of the injection load solenoid base with the
control unit disconnected and the solenoid discon-
nected.
Resistance of the primary = 0.5 ± 8% Ohm
Check the efficiency of the injection load relay.
Check the resistance of the energising coil be-
tween pins 86 and 85: 40 to 80 Ohm
Apply a voltage of 12V to pins 86 and 85; make
sure that there is continuity between pins 30 and
87 of the relay.
Check the power supply line of the injection load
solenoid energising coil: after switching to "ON",
make sure there is battery voltage, for 2 seconds,
between the Red-White cable and Black-Purple
cable of the solenoid base. If there is not, check
the continuity of the Red-White cable between the
fuse box and the solenoid base and of the Black-
Purple cable between the pin 20 of the control unit
and the solenoid base.
N.B.
CONTINUITY TESTS MUST BE CARRIED OUT WITH THE
COMPONENTS DISCONNECTED. (RELAYS, CONTROL
UNIT, FUSES ETC.).
INJEC - 166
Vespa GTS Super 125 i.e.