Checking The Crankshaft Position Sensor; Checking The Starter Motor Operation - Yamaha MT-09 2021 Service Manual

G089048
2. Ignition coil
c. Turn the main switch to "ON".
d. Measure the ignition spark gap "a".
e. Crank the engine by pushing the " " side of
the stop/run/start switch and gradually in-
crease the spark gap until a misfire occurs.
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 crank-
shaft position sensor.
Crankshaft position sensor re-
sistance
228–342 Ω
a. Connect the digital circuit tester (Ω) to the
crankshaft position sensor coupler as
shown.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with ta-
chometer
YU-A1927
• Positive tester probe
black "1"
• Negative tester probe
gray "2"
ELECTRICAL COMPONENTS
b. Measure the crankshaft position sensor re-
sistance.
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-
15.
a. Connect the positive battery terminal "1"
and starter motor lead "2" with a jumper
lead "3".
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.
G089054
b. Check the starter motor operation.
8-60
B Gy