Checking The Stator Coil; Checking The Rectifier/Regulator - Yamaha 2009 XP500Y TMAX Service Manual

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 crank-
shaft position sensor/stator assembly.
Stator coil resistance
0.225–0.275 Ω at 20 °C (68 °F)
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a. Connect the pocket tester (Ω × 1) to the stator
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"
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8-74
ELECTRICAL COMPONENTS
b. Measure the stator coil resistance.
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EAS28170

CHECKING THE RECTIFIER/REGULATOR

1. Check:
• Rectifier/regulator output voltage
Out of specification → Replace the rectifi-
er/regulator.
Rectifier/regulator output voltage
14 V at 5000 r/min
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a. Set the engine tachometer to the spark plug
lead of cylinder #1.
b. Connect the pocket tester (AC 20 V) to the
rectifier/regulator coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
red "1"
• Negative tester probe →
black "2"
c. Start the engine and let it run at approximate-
ly 5000 r/min.
d. Measure the rectifier/regulator output volt-
age.
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