APRILIA 8140172, Service And Repair Manual

Page: 249 / 279

ELECTRICAL SYSTEM
6 - 14
RSV mille
6.4.10 CHECKING THE THROTTLE VALVE
POTENTIOMETER
With the engine switched off:
◆ Lift the fuel tank, see 2.8 (LIFTING THE FUEL TANK).
◆
Disconnect the four-way connector (coloured black) (1).
a
CAUTION
When reassembling, make sure the electric connec-
tor (1) is plugged in properly.
◆ Turn the ignition switch to position “
n
”.
◆ Using a pocket tester, measure the supply voltage be-
tween the terminals of the potentiometer (2);
measurement (A).
Standard value: 4.5 - 5.5 V.
◆ Turn the ignition switch to position “
m
”.
◆ Using a pocket tester (scale k
Ω
), measure the resist-
ance between the terminals of the potentiometer (2).
MEASUREMENT (A)
Resistance between the two terminals whatever the posi-
tion of the throttle valves:
Standard value: 2.87
−
5.33 k
Ω
.
MEASUREMENT (B)
Starting with the throttle valve fully closed, accelerating
progressively until completely open, the resistance
should vary as follows;
standard value:
– with throttle valves closed 0.34 - 5.69 k
Ω;
– with throttle valves open 2.87 - 8.41 k
Ω.
NOTE
In order to make it easier to unscrew the
screws (3) secured using LOCTITE
®
243, heat them first
with a hot air blower.
◆ Unscrew and remove the screws (3).
◆
Remove the potentiometer (2).
◆ Using a tester (k
Ω
scale), measure the resistance be-
tween the potentiometer terminals (2); measurement
(B).
Standard value:
– with throttle valves closed < 5.2 k
Ω;
– with throttle valves open 3.34 – 8.88 k
Ω.
If the measurements result in any resistance values
other than those given, replace the potentiometer (2).
◆ With the throttle valves in the closed position, place the
potentiometer in its housing (2).
NOTE
Apply LOCTITE
®
243 on the thread of the
screws (3).
◆ Screw the screws (3) on by hand so that they hold the
potentiometer (2) in place but do not prevent it from ro-
tating.
◆ Connect the TEST connectors.
◆ Turn the ignition switch to position “
n
”.
◆ Turn the potentiometer (2) until the display reads “ ”.
◆ Tighten the screws (3).
Driving torque of screws (3): 1.6 Nm (0.16 kgm).
◆ Turn the ignition switch to position “
m
”.
◆ Disconnect the TEST connectors.