Couplers And Leads Connection Inspection; Throttle Position Sensor Coil Inspection - Yamaha YZ250F(V) Owner's Service Manual

THROTTLE POSITION SENSOR SYSTEM
1
HANDLING NOTE
CAUTION:
Do not loosen the screws (throttle position
sensor) 1 except when changing the throt-
tle position sensor due to failure because it
will cause a drop in engine performance.
EC624000
COUPLERS AND LEADS CONNECTION
INSPECTION
1. Check:
• Couplers and leads connection
Rust/dust/looseness/short-circuit →
Repair or replace.
THROTTLE POSITION SENSOR COIL
INSPECTION
1. Inspect:
• Throttle position sensor coil resistance
Out of specification → Replace.
Tester (+) lead → Blue lead 1
Tester (–) lead → Black lead 2
Throttle posi-
tion sensor coil
resistance
4 ~ 6 kΩ at
20 °C (68 °F)
2. Loosen:
• Throttle stop screw 1
NOTE:
Turn out the throttle stop screw until the throt-
tle shaft is in the full close position.
6 - 8
– +
ELEC
Tester selector
position
kΩ × 1