Checking The Starter Motor Operation; Checking The Stator Coil - Yamaha YZ 2015 Series Owner's Service Manual

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a. Connect the lean angle sensor coupler to
the wire harness.
b. Connect the pocket tester (DC 20 V) to the
lean angle sensor coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
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"
a a
ON ON
b
c. Incline the lean angle sensor.
d. Measure the lean angle sensor out put volt-
age.
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CHECKING THE STARTER MOTOR OPERA- EASB291360
TION
1. Check:
• Coolant temperature sensor
Does not operate  Perform the electric
starting system troubleshooting, starting
with step 4.
Refer to "ELECTRIC STARTING SYSTEM"
on page 8-6.
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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.
b. Check the starter motor operation.
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CHECKING THE STATOR COIL

EAS28150
1. Disconnect:
2. Check:
1
2
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a. Connect the pocket tester (  1) to the sta-
8-64
ELECTRICAL COMPONENTS
• Stator coil coupler
(from the wire harness)
• Stator coil resistance
Out of specification  Replace the stator
coil.
Stator coil resistance
0.528–0.792  (W–W)
tor coil coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• 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"