Checking The Speed Sensor (For Yp250R); Checking The Radiator Fan Motor - Yamaha MBK XMAX 2014 Service Manual

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a. Connect the pocket tester (Ω × 10) to the fuel
sender terminal as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
sky blue "1"
• Negative tester probe →
black "2"
2
b. Move the fuel sender float to minimum "3"
and maximum "4" level position.
4
3
c. Measure the fuel sender resistance.
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EAS2DM1126
CHECKING THE SPEED SENSOR (for
YP250R)
1. Check:
• Speed sensor output voltage
Out of specification → Replace.
Output voltage reading cycle
0.6 V to 4.8 V to 0.6 V to 4.8 V
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a. Connect the test harness-speed sensor (3P)
"1" to the speed sensor coupler and wire har-
ness as shown.
b. Connect the pocket tester (DC 20 V) to the
test harness-speed sensor (3P).
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1
Sb B
R/B L/R
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ELECTRICAL COMPONENTS
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• Positive tester probe →
white (wire harness color)
• Negative tester probe →
black/blue (wire harness color)
c. Turn the main switch to "ON".
d. Elevate the front wheel and slowly rotate it.
e. Measure the voltage of white and black/blue.
With each full rotation of the front wheel, the
voltage reading should cycle from 0.6 V to 4.8
V to 0.6 V to 4.8 V.
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EAS28250

CHECKING THE RADIATOR FAN MOTOR

1. Check:
• Radiator fan motor
Faulty/rough movement → Replace.
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a. Disconnect the radiator fan motor coupler
from the wire harness.
b. Connect the battery (DC 12 V) as shown.
• Positive battery terminal →
red "1"
• Negative battery terminal →
black "2"
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8-146
Test harness– speed sensor (3P)
90890-03208
Test harness– speed sensor (3P)
YU-03208
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
1
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