Yamaha XF50W Service Manual page 276

THROTTLE BODY AND FUEL INJECTOR
Positive tester probe
Negative tester probe
terminal (2)
f*
Digital circuit tester
90890-03174
b. Measure the throttle position sensor volt-
age.
Out of specification
wire harness.
U
Throttle position sensor voltage
5V
(blue-black/blue)
c. Connect the digital circuit tester to the ter-
minals of the throttle position sensor.
Positive tester probed
yellow terminal
Negative tester probe
black/blue terminal
d. While slowly opening the throttle, check that
the throttle position sensor voltage is in-
creased.
Voltage does not change or it changes
abruptly -» Replace the throttle body.
Out of specification (closed position)
place the throttle body.
Bl
Throttle position sensor voltage
(closed position)
0.63 ~ 0.73 V
(yellow-black/blue)
•••••••••••••••••••••••
7-33
FI ifl
-> blue terminal ®
-» black/blue
-» Replace or repair the
-» Re-