Yamaha WR250F Manuel D'atelier page 618

THROTTLE POSITION SENSOR SYSTEM
THROTTLE POSITION SENSOR SYSTEM
INSPECTION STEPS
If the throttle position sensor will not operate, use the following inspection steps.
Check entire ignition
system for connection.
OK
Check throttle position
sensor.
OK
*Check CDI magneto.
OK
Check CDI unit.
*marked: Refer to "IGNITION SYSTEM" section.
NOTE:
Remove the following parts before inspection.
1) Seat
2) Fuel tank
Use the following special tools in this inspection.
Pocket tester:
YU-3112-C/90890-03112
All manuals and user guides at all-guides.com
No good
Throttle posi-
tion sensor coil
Charging coil
Throttle posi-
tion sensor
input voltage
6 - 7
ELEC
Repair or replace.
No good
Replace.
No good
Replace.
No good
Replace.
Inductive tachometer:
YU-08036-B
Engine tachometer:
90890-03113
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