Yamaha YW125Y_ Utility Trailer User Manual


 
6-35
FI
THROTTLE BODY AND FUEL INJECTOR
3
2
1
B/L
Y
L
P/W
Br/W
EAS0091 6
CHECKING THE THROTTLE POSITION SEN-
SOR
1. Check:
8throttle position sensor
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the digital circuit tester to the ter-
minals of the throttle position sensor.
Positive tester probe
JJ
JJ
J blue terminal
11
11
1
Negative tester probe
JJ
JJ
J black/blue
terminal
22
22
2
Digital circuit tester
90890-03174
b. Measure the throttle position sensor volt-
age.
Out of specification J Replace or repair the
wire harness.
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
JJ
JJ
J
yellow terminal
33
33
3
Negative tester probe
JJ
JJ
J
black/blue terminal
22
22
2
d. While slowly opening the throttle, check that
the throttle position sensor voltage is in-
creased.
Voltage does not change or it changes
abruptly J Replace the throttle body.
Out of specification (closed position) J Re-
place the throttle body.
Throttle position sensor voltage
(closed position)
0.63 ~ 0.73 V
(yellow-black/blue)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
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