Yamaha XP500, Service Manual

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FI
THROTTLE BODY
EAS00916
CHECKING AND ADJUSTING THE
THROTTLE POSITION SENSOR
NOTE:
Before adjusting the throttle position sensor,
the engine idling speed should be properly
adjusted.
1. Check:
• throttle position sensor
▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼
a. Disconnect the throttle position sensor cou-
pler from the throttle position sensor.
b. Remove the throttle position sensor from
the throttle body.
c. Connect the pocket tester (
Ω ×
1k) to the
terminals of the throttle position sensor.
d. Measure the maximum throttle position sen-
sor resistance.
Out of specification
→
Replace the throttle
position sensor.
e. Connect the pocket tester (
Ω ×
1k) to the
terminals of the throttle position sensor.
f. While slowly opening the throttle, check that
the throttle position sensor resistance is
within the specified range.
Resistance does not change or it changes
abruptly
→
Replace the throttle position
sensor.
The slot is worn or broken
→
Replace the
throttle position sensor.
Positive tester probe
→
blue terminal
1
Negative tester probe
→
black/blue terminal
2
Maximum throttle position sensor
resistance
4.0 ~ 6.0 k
Ω
at 20 °C (68 °F)
(blue – black/blue)
Positive tester probe
→
yellow terminal
3
Negative tester probe
→
black/blue terminal
2
1 2 3
L Y B / L