Throttle Position Sensor System - Yamaha WR250F(W) Owner's Service Manual

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 unit.
NOTE:
Use the following special tools in this inspection.
Pocket tester:
YU-3112-C/
90890-03112
THROTTLE POSITION SENSOR SYSTEM
No good
Throttle position
sensor coil
Throttle position
sensor input
voltage
7 - 51
ELEC
Repair or replace.
No good
No good
– +
Replace.
Replace.