Yamaha YZ250F 2004 Manuel D'atelier Du Proprietaire page 608

THROTTLE POSITION SENSOR SYSTEM
1
9. Tighten:
Screw (throttle position sensor) 1
G
NOTE:
Tighten the screws (throttle position sensor)
using the T25 bit.
10. Stop the engine.
THROTTLE POSITION SENSOR INPUT
VOLTAGE INSPECTION
1. Disconnect the throttle position sensor
coupler.
2. Start the engine.
3. Inspect:
Throttle position sensor input voltage
G
Out of specification → Replace the CDI
unit.
Tester (+) lead → Blue lead 1
Tester (–) lead → Black/Blue lead 2
Throttle posi-
tion sensor
input voltage
4 ~ 6 V
6 - 11
– +
ELEC
Tester selector
position
DCV-20