Throttle Position Sensor System - Yamaha YZ250F(R) Owner's Service Manual

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:
Use the following special tools in this inspection.
Pocket tester:
YU-3112-C/90890-03112
No good
No good
Throttle posi-
tion sensor coil
No good
Charging coil
Throttle posi-
No good
tion sensor
input voltage
Inductive tachometer:
Engine tachometer:
6 - 7
ELEC
Repair or replace.
Replace.
Replace.
Replace.
YU-8036-B
90890-03113
– +