mote control disconnected, that the Black-Purple
cable (pin 20 on the interface wiring) is insulated
from the ground.
Specific tooling
020331Y Digital multimeter
Circuit leak test
Install the specific tool for checking the fuel pressure, with the pipe fitted with the gauge.
Check during regular operation by placing the ap-
propriate tool between the pump and the injector.
With the battery voltage > 12 V check that the fuel
pressure is 2.5 BAR and that the input current is
1.4 to 1.8 A.
With the battery voltage > 12 V, check the pump flow rate by disconnecting from the injector the pipe
equipped with the pressure gauge of the appropriate tool. Make a graded burette available with a flow
rate of approximately 1 L. Rotate the pump using the active diagnosis of the palm top computer. Using
a pair of long flat needle-nose pliers, choke the fuel pipe making the pressure stabilise at approx. 2.5
bar. Check that within 15 seconds the pump has a flow rate of approx. 110 cm³.
Specific tooling
020480Y Petrol pressure check set
Fuel filter check
After removing from the tank, disconnect the elec-
tric pump terminals.
Injection Vespa LX 125 - 150 i.e.
INJEC - 166