Yamaha wr250f, Owner'S Service Manual

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THROTTLE POSITION SENSOR SYSTEM
THROTTLE POSITION SENSOR SYSTEM
INSPECTION STEPS
If the throttle position sensor will not operate, use the following inspection steps.
NOTE:
Use the following special tools in this inspection.
Check entire ignition
system for connection.
Repair or replace.
Check throttle position sensor.
Throttle position
sensor coil
Replace.
Check CDI unit.
Throttle position
sensor input
voltage
Replace.
Pocket tester:
YU-3112-C/
90890-03112
No good
OK
No good
OK
No good