VESPA GTS Super 125 i.e. Service Station Manual page 146

Injection
6. Injection load relay
7. Fuel pump
8. HV coil
9. Fuel injector
10.Electric fan relay
11.Coolant electric pump
When switched to "ON", the fuel pump starts to rotate for two seconds and then stops. When the engine
starts, in the presence of rpm timing signal the pump is continuously supplied.
•
Pump winding resistance ~ 1.5 Ohm
•
Input current during regular operation 1.4 - 1.8 A
•
Input current to the closed hydraulic circuit ~ 2 A (to be checked with appropriate tool for
fuel pressure control choking the circuit on the return pipe)
Check that the injection load 15A fuse No. 3 works
properly.
Check that the 7.5A fuse No. 2 for live control unit
power works properly.
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
relay energising coil: after switching to "ON", make
sure there is battery voltage, for 2 seconds, be-
tween the Red-White cable and Black-Purple ca-
ble of the relay base. If there is not, check the
continuity of the Red-White cable between the
fuse box and the relay base and of the Black-Pur-
INJEC - 146
ELECTRICAL DATA
Vespa GTS Super 125 i.e.