APRILIA 8140172, Service And Repair Manual

Page: 252 / 279

ELECTRICAL SYSTEM
6 - 17
RSV mille
6.5.2 CHECKING THE FUEL PUMP
In order to check the pump is operating properly:
◆ Lift the fuel tank, see 2.8 (LIFTING THE FUEL TANK).
◆ Disconnect the pump units three-way connector (1)
(coloured white).
a
CAUTION
When refitting, make sure the electric connector (1) is
plugged in properly.
Place a cloth under the perforated screw (2) to catch
any fuel spills.
◆ Loosen the perforated screw (2) by approx. half a turn
and wait a few seconds to allow the system to depres-
surize.
◆ Unscrew and remove the perforated screw (2) and re-
trieve the two gaskets (3).
Driving torque of perforated screw (2):
22 Nm (2.2 kgm).
a
WARNING
When reassembling, use two new gaskets (3) and
torque the perforated screw (2) to specification in or-
der to ensure the tank is perfectly hermetic.
This is essential as the injection pressure is approx.
450 kPa (4.5 bar) and any fuel leakage would prove
highly dangerous as the leaking oil might end up on
high-temperature parts of the engine.
NOTE
Have the appropriate special tool
&
cod.
8140181 (fuel-oil pressure gauge) to hand .
◆ Fit the appropriate special tool.
◆
Insert the free end of the pipe inside a container.
◆ Power the positive ( ) green (V) and negative (
Ò
) blue
(B) cables with a voltage of 12 V (d.c.) (from the pump
unit side).
◆ Make sure the pump is working and produces the char-
acteristic humming sound and check the pressure
gauge gives a supply pressure reading of at least 350
kPa (3.5 bar).
6.5.3 CHECKING THE FUEL PUMP RELAY
◆ Remove the passenger seat, see 7.1.2 (UNLOCKING /
LOCKING THE PASSENGER SEAT).
In order to check the operation of the relay:
◆ Disconnect the four-way connector (4) (coloured white)
from the relay (5).
a
CAUTION
When reassembling, make sure the electric connec-
tor (4) is plugged in properly.
◆ Power the two internal male terminals ( - ) at 12 V.
◆ Using a tester (set as an ohmmeter), check for breaks
between the other two terminals ( - ).
Correct value with relay powered: 0
Ω
.
Correct value with relay not powered:
∞
Ω
.
If the resulting values do not correspond to those
featured, change the relay (5).
6.5.4 CHECKING THE ENGINE SHUTOFF RELAY
The procedure is exactly the same as that used to check
the fuel pump relay, see 6.5.3 (CHECKING THE FUEL
PUMP RELAY).