VESPA GTV 250 i.e. 2008 Service Station Manual page 191

Vespa GTV 250 i.e.
high temperatures, it has an electric preheating element inside it, controlled by the control unit, to take
it quickly to the functioning state.
Specific tooling
020481Y Wiring of the control unit's interface
020331Y Digital multimeter
Check that the injection load 10A fuse No. 3 is in
good conditions.
Check that the 7.5A fuse No. 2 for the live control
unit is in good conditions.
Check there is voltage between pins 21 and 26 of
the interface wiring, for around two seconds, when
switching to «ON».
With the engine cold, check the resistance of the
Lambda sensor heater between pin 21 of the in-
terface wiring and the black green cable of the
injection load remote control base, with the control
unit disconnected and the remote control discon-
nected.
Resistance of the heater at approximately 20° = 9
Ohm ± 20%
Injection
INJEC - 191