Checking And Adjusting The Throttle Position Sensor - Yamaha XVS250 2001 Service Manual

CARBURETOR
EAS00502
CHECKING AND
THROTTLE POSITION SENSOR
NOTE:
Before adjusting the throttle position sensor, the
engine idling speed should be properly ad-
justed.
1. Check:
D throttle position sensor
(installed on the carburetor)
a. Disconnect the throttle position sensor cou-
pler from the wire harness.
b. Connect the pocket tester (Ω
throttle position sensor coupler.
Positive tester probe  blue terminal 1
Negative tester probe  black terminal 2
c. Measure the maximum throttle position sen-
sor resistance.
Out of specification  Replace the throttle
position sensor.
Maximum throttle position sensor
resistance
4.0 X 6.0 kΩ at 20_C
(blue – black)
d. Connect the pocket tester (Ω
throttle position sensor.
Positive tester probe  yellow terminal 3
Negative tester probe  black terminal 2
e. While slowly opening the throttle, check that
the throttle position sensor resistance is with-
in the specified range.
NOTE:
Check mainly that the resistance changes grad-
ually when turning the throttle, since the read-
ings (from closed to wide-open throttle) may dif-
fer slightly from those specified.
Out of specification or the resistance
changes abruptly  Go to step 2 below.
Throttle position sensor
resistance
(520 X 900 Ω) X (4.0 X 6.0 kΩ)
at 20_C
(yellow – black)
6-9
CARB
ADJUSTING THE
1k) to the
1k) to the