Throttle Position Sensor System - Yamaha YZ450F(Y Owner's 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. (Charging coil)
OK ↓
Check CDI unit. (Throttle position sensor input
voltage)
*marked: Refer to "IGNITION SYSTEM" section.
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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