Checking The Lean Angle Sensor; Checking The Starter Motor Operation - Yamaha WR450F Owner's Service Manual

Crankshaft position sensor resis-
tance
228–342 
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a. Connect the pocket tester (  100) to the
crankshaft position sensor coupler.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe 
Gray "1"
• Negative tester probe 
Black "2"
b. Measure the crankshaft position sensor re-
sistance.
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CHECKING THE LEAN ANGLE SENSOR

EAS2GC1393
1. Remove:
• Lean angle sensor
(from the bracket)
2. Check:
• Lean angle sensor output voltage
Out of specification  Replace.
Lean angle sensor output voltage
Operating angle
45 °
Output voltage up to operating
angle
3.7–4.4 V
Output voltage over operating an-
gle
0.4–1.4 V
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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.
1 2
Gy B
ELECTRICAL COMPONENTS
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"
45
°
c. Incline the lean angle sensor.
d. Measure the lean angle sensor output volt-
age.
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EAS2GC1394 CHECKING THE STARTER MOTOR OPERA-
TION
1. Check:
• Starter motor operation
Does not operate  Perform the electric
starting system troubleshooting, starting
with step 4.
Refer to "ELECTRIC STARTING SYSTEM"
on page 9-6.
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a. Connect the positive battery terminal "1" and
starter motor lead "2" with a jumper lead "3".
EWA
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.
9-75
45
°
1
2