Checking The Gear Position Switch; Checking The Injector - Yamaha WR450FN 2022 Owner's Service Manual

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CHECKING THE GEAR POSITION SWITCH

1. Remove:
• Gear position switch
2. Check:
• Gear position switch
Out of specification  Replace.
3.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with tachom-
eter
YU-A1927
Continuity
Positive tester probe 
Sky blue "1"
Negative tester probe 
Sensor terminal "a"
Continuity
Positive tester probe 
Pink "2"
Negative tester probe 
Sensor terminal "b"
Continuity
Positive tester probe 
Pink "2"
Negative tester probe 
Sensor terminal "c"
Continuity
Positive tester probe 
Yellow/White "3"
Negative tester probe 
Sensor terminal "d"
Continuity
Positive tester probe 
Yellow/White "3"
Negative tester probe 
Sensor terminal "e"
Continuity
Positive tester probe 
Yellow/White "3"
Negative tester probe 
Sensor terminal "f"
ELECTRICAL COMPONENTS
f
b a
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CHECKING THE INJECTOR

1. Remove:
• Fuel injector
Refer to "THROTTLE BODY" on page 7-4.
2. Check:
• Fuel injector resistance
Out of specification  Replace.
Resistance
12.0 
a. Disconnect the fuel injector coupler from
the fuel injector.
b. Connect the digital circuit tester () to the
fuel injector coupler.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with tachom-
eter
YU-A1927
• Positive tester probe 
Injector terminal "1"
• Negative tester probe 
Injector terminal "2"
1
c. Measure the fuel injector resistance.
8-71
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e
Y/W P
Sb
d
1
c
2