Yamaha WR250F(N), Owner'S Service Manual

Page: 626 / 686

6 - 10
– +
ELEC
THROTTLE POSITION SENSOR SYSTEM
6. Adjust:
●
Throttle position sensor coil resistance
at idle speed
Adjustment steps:
Adjust the angle of the throttle position sen-
sor
1 to obtain the resistance calculated
(example: 650 ~ 750
Ω
)
Tester (+) lead
→
Yellow lead 2
Tester (–) lead
→
Black lead 3
7. Tighten:
●
Screw (throttle position sensor) 1
NOTE:
Tighten the screws (throttle position sensor)
using the T20 bit (tamper resistant fastener
type).
8. Install:
●
Throttle position sensor coupler
THROTTLE POSITION SENSOR INPUT
VOLTAGE INSPECTION
1. Disconnect the throttle position sensor
coupler.
2. Start the engine.
3. Inspect:
●
Throttle position sensor input voltage
Out of specification
→
Replace the CDI
unit.
Tester (+) lead
→
Blue lead 1
Tester (–) lead
→
Black/Blue lead 2
Throttle posi-
tion sensor
input voltage
Tester selector
position
4 ~ 6 V DCV-20