Checking The Lean Angle Sensor; Checking The Starter Motor Operation - Yamaha WR250F 2016 Owner's Service Manual

Out of specification  Replace.
Crankshaft position sensor resis-
tance
228–342  (Gy–B)
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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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EAS2GB7392

CHECKING THE LEAN ANGLE SENSOR

1. Remove:
• Lean angle sensor
(from the bracket)
2. Check:
• Lean angle sensor output voltage
Out of specification  Replace.
Lean angle sensor output voltage
Less than 45° "a"
0.4–1.4V
More than 45° "b"
3.7–4.4V
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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"
a
ON
b
c. Incline the lean angle sensor.
d. Measure the lean angle sensor output volt-
age.
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CHECKING THE STARTER MOTOR OPERA- EAS2GB7393
TION
1. Check:
• Coolant temperature sensor
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
• Handle the coolant temperature sensor
with special care.
• Never subject the coolant temperature
sensor to strong shocks. If the coolant
temperature sensor is dropped, replace it.
9-75
a
ON
1
2