APRILIA SHIVER 900 Service Station Manual page 159

SHIVER 900
on the injector connector: if there is, restore the wiring harness of the filter housing; if not,
replace the sensor.
•
If short circuit to negative: disconnect the injector connector, turn the key to ON and check
if there is ground connection in the cable white/black: if the connection is present, restore
the wiring harness, if not present replace the injector
•
If open circuit: check the component correct electrical characteristic: if it is not the correct
one, replace the component; if it is correct, check the connector on the component and the
Marelli control unit connector: if not ok, restore; if ok, check the continuity of the cable be-
tween the VEHICLE PIN 67 and PIN 2 of the component and restore the wiring harness.
Fuel pump
Function
Fuel pump: keeps pressure of the injectors supply
duct.
Low fuel: tells to the instrument panel about low
fuel
Operation / Operating principle
Low fuel: it is a resistance that if correctly supplied
varies its electrical resistance if it is damped or not
by petrol.
Level in electrical circuit diagram:
Injection loads relay.
Position:
•
On the vehicle: on the tank.
•
Connector: under the saddle, on RH
side (black colour 4 way)
Electrical specifications:
PIN 1-2: 0,5- 1 Ohm PIN 3-4: there is no need to
measure the electrical resistance of the compo-
nent because its correct operation occurs only with
a proper power supply delivered by the instrument
panel.
Check the correct operation as follows: connect in
series a bulb of approximately 2 W: it must light up
if the tank is in reserve; otherwise, it must stay off.
Pin out:
Electrical system
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