Yamaha R15 2022 Service Manual page 483

EWA13810
WARNING
• 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.
EAS30566
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
0.360–0.540 Ω
a. Connect the multimeter (Ω × 1) to the sta-
tor coil coupler as shown.
Multimeter
INS-003
(90890-03189)
• Positive tester probe →
white "1"
• Negative tester probe →
white "2"
ELECTRICAL COMPONENTS
EAS30680
CHECKING THE RECTIFIER/REGULATOR
1. Check:
8-150
1
W
W
2
b. Measure the stator coil resistance.
• Rectifier/regulator output voltage (Charging
voltage)
Out of specification → Replace the rectifier/
regulator.
Rectifier/regulator output voltage
14.0–14.8 V at 5000 r/min
a. Connect the multimeter (DC 20 V) to the
rectifier/regulator coupler as shown.
Multimeter
INS-003
(90890-03189)
• Positive tester probe →
positive battery terminal "1"
• Negative tester probe →
negative battery terminal "2"
1
2
b. Start the engine and let it run at approxi-
mately 5000 r/min.
c. Measure the charging voltage.
ELEC – +