Yamaha MBK X-MAX 300 2017, Service Manual

Page: 439 / 462

ELECTRICAL COMPONENTS
8-134
EAS30560
CHECKING THE CRANKSHAFT POSITION
SENSOR
1. Disconnect:
• Crankshaft position sensor coupler
(from the wire harness)
2. Check:
• Crankshaft position sensor resistance
Out of specification
→
Replace the stator coil
assembly.
a. Connect the digital circuit tester to the
crankshaft position sensor coupler as
shown.
b. Measure the crankshaft position sensor
resistance.
EAS30562
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 “TROUBLESHOOTING” on page
8-8.
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.
EAS30566
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.
a. Connect the digital circuit tester to the sta-
tor coil coupler as shown.
Crankshaft position sensor resis-
tance
228–342
Ω
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with ta-
chometer
YU-A1927
• Positive tester probe
→
red “1”
• Negative tester probe
→
white “2”
W
R
1
2
Stator coil resistance
0.360–0.540
Ω
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with ta-
chometer
YU-A1927
• Positive tester probe
→
white “1”
• Negative tester probe
→
white “2”