Checking The Starter Motor Operation; Checking The Stator Coil - Yamaha YZ 2018 Series Owner's Service Manual

Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with
tachometer
YU-A1927
Test harness– lean angle sensor
(6P)
90890-03209
Test harness– lean angle sensor
(6P)
YU-03209
• Positive tester probe 
Yellow/Green "1"
• Negative tester probe 
Black/Blue "2"
45 45
c. Incline the lean angle sensor.
d. Measure the lean angle sensor output volt-
age.
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EASB29B358
CHECKING THE STARTER MOTOR OPERA-
TION
1. Check:
• Starter motor
Does not operate  Perform the electric
starting system troubleshooting, starting
with step 4.
Refer to "ELECTRIC STARTING SYSTEM"
on page 8-5.
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a. Connect the positive battery terminal "1" and
starter motor lead "2" with a jumper lead "3".
EWA
WARNING
• Handle the coolant temperature sensor
with special care.
• Never subject the coolant temperature
sensor to strong shocks. If the coolant
temperature sensor is dropped, replace it.
1
2
8-68
ELECTRICAL COMPONENTS
b. Check the starter motor operation.
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EAS28150

CHECKING THE STATOR COIL

1. Disconnect:
• Stator coil coupler
(from the wire harness)
2. Check:
• Stator coil resistance
Out of specification  Replace the stator
coil.
Stator coil resistance
0.528–0.792 
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a. Connect the digital circuit tester () to the
stator coil coupler as shown.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with
tachometer
YU-A1927
• Positive tester probe 
White "1"
• Negative tester probe 
White "2"
• Positive tester probe 
White "1"
• Negative tester probe 
White "3"
• Positive tester probe 
White "2"
• Negative tester probe 
White "3"