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Yamaha YZ450F Owner's Service Manual: Throttle Position Sensor System

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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 AC magneto.
OK ↓
Check ECU. (Throttle position sensor input volt-
age)
*marked: Refer to "IGNITION SYSTEM" section.
Use the following special tools in this inspection.
Model 88 Multimeter with tacometer:
YU-A1927
Digital circuit tester:
90890-03174
Test harness-speed sensor (3P):
YU-03208/90890-03208
THROTTLE POSITION SENSOR SYSTEM
No good →
Repair or replace.
No good →
Replace.
No good →
Replace.
No good →
Replace.
7-6

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  • Rob Apr 28, 2017 08:33:
    Thank you for the manuals. Yzf450 braap!