Checking The Lean Angle Sensor; Checking The Starter Motor Operation - Yamaha MBK MW125 2014 Service Manual

Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
white/red "1"
• Negative tester probe →
white/blue "2"
2
W/L
W/R
1
b. Measure the crankshaft position sensor re-
sistance.
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EAS30561

CHECKING THE LEAN ANGLE SENSOR

1. Remove:
• Lean angle sensor
(from the rear fender)
2. Check:
• Lean angle sensor output voltage
Out of specification → Replace.
Lean angle sensor output voltage
Less than 50°: 0.4–1.4 V
More than 50°: 3.7–4.4 V
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a. Connect the test harness-lean angle sensor
1PA (3P) "1" to the lean angle sensor and
wire harness as shown.
b. Connect the pocket tester (DC 20 V) to the
test harness-lean angle sensor 1PA (3P).
Test harness– lean angle sensor
1PA (3P)
90890-03237
Test harness– lean angle sensor
1PA (3P)
YU-03237
• Positive tester probe →
yellow/green (wire harness color)
• Negative tester probe →
black/blue (wire harness color)
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ELECTRICAL COMPONENTS
50˚
c. Turn the main switch to "ON".
d. Turn the lean angle sensor to 50°.
e. Measure the lean angle sensor output volt-
age.
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EAS30562
CHECKING THE STARTER MOTOR
OPERATION
1. Check:
• Starter motor operation
Does not operate → Perform the electric
starting system troubleshooting, starting with
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step 4.
Refer to "TROUBLESHOOTING" on page
8-8.
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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
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fluid is in the vicinity.
b. Check the starter motor operation.
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8-65
50˚
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1
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