Yamaha YZF-R1 Series Service Manual page 487

c. Measure the fuel injector resistance.
EAS31673
CHECKING THE WHEEL SWITCH
1. Check:
• Wheel switch "1" output voltage
Out of specification → Replace the handlebar
switch (right).
a. Connect the digital circuit tester (DC V) to
the handlebar switch coupler (right) as
shown.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with ta-
chometer
YU-A1927
• Positive tester probe
white/green "2"
• Negative tester probe
black/yellow "3"
b. Turn the main switch to "ON".
c. When turning the wheel switch in direction
"a" and "b", check that the output voltage is
within the specified values.
Output voltage reading cycle
More than 5 V to less than 0.5 V
then back to more than 5 V to
less than 0.5 V
d. Connect the digital circuit tester (DC V) to
the handlebar switch coupler (right) as
shown.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with ta-
chometer
YU-A1927
ELECTRICAL COMPONENTS
• Positive tester probe
white/black "4"
• Negative tester probe
black/yellow "3"
e. When turning the wheel switch in direction
"a", check that the output voltage is within
the specified values.
Output voltage
More than 5 V
f. When turning the wheel switch in direction
"b", check that the output voltage is within
the specified values.
Output voltage
Less than 0.5 V
2
4
8-52
a
3
b
1