Throttle Position Sen Sor System - Yamaha YZ250 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. (Throttle position
sensor coil)
OK ↓
*Check CDI magneto. (Source coil)
OK ↓
Check CDI unit. (Throttle position sensor input
voltage)
*marked: Refer to "IGNITION SYSTEM" section.
• 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
THROTTLE POSITION SENSOR SYSTEM
No good → Repair or replace.
No good →
Replace.
No good → Replace.
No good →
Replace.
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