Yamaha YZ 2019 Series, Owner'S Service Manual

Page: 363 / 398

ELECTRICAL COMPONENTS
8-64
c. Incline the lean angle sensor.
d. Measure the lean angle sensor output volt-
age.
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EAM30299
CHECKING THE STARTER MOTOR
OPERATION
1. Check:
•
Starter motor operation
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”.
WARNING
EWA13810
• A wire that is used as a jumper lead must
have at least the same capacity of the bat-
tery lead, otherwise the jumper lead may
burn.
• This check is likely to produce sparks,
therefore, make sure no flammable gas or
fluid is in the vicinity.
b. Check the starter motor operation.
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EAM30300
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.
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a. Connect the digital circuit tester (

) to the sta-
tor coil coupler as shown.
b. Measure the stator coil resistance.
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EAM30301
CHECKING THE RECTIFIER/REGULATOR
1. Check:
• Charging voltage
Out of specification

Replace the rectifi-
er/regulator.
2
1
45 45
Stator coil resistance
0.528–0.792

Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with tachom-
eter
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”
1 2 3