Checking The Coolant Temperature Sensor; Checking The Throttle Position Sensor - Yamaha MBK XMAX 2014 Service Manual

c. Check the radiator fan motor movement.
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EAS28260
CHECKING THE COOLANT TEMPERATURE
SENSOR
1. Remove:
• Coolant temperature sensor
Refer to "CYLINDER HEAD" on page 5-8.
EWA14130
WARNING
• Handle the coolant temperature sensor
with special care.
• Never subject the coolant temperature sen-
sor to strong shocks. If the coolant temper-
ature sensor is dropped, replace it.
2. Check:
• Coolant temperature sensor resistance
Out of specification → Replace.
Coolant temperature sensor re-
sistance
2.32–2.59 kΩ at 20 °C (68 °F)
310–326 Ω at 80 °C (176 °F)
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a. Connect the pocket tester (Ω × 1k × 100) to
the coolant temperature sensor terminals as
shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
b. Immerse the coolant temperature sensor "1"
in a container filled with coolant "2".
TIP
Make sure the coolant temperature sensor ter-
minals do not get wet.
c. Place a thermometer "3" in the coolant.
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ELECTRICAL COMPONENTS
3
d. Heat the coolant or let it cool down to the
specified temperatures.
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e. Measure the coolant temperature sensor re-
sistances.
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3. Install:
• Coolant temperature sensor
EAS28300
CHECKING THE THROTTLE POSITION
SENSOR
1. Check:
• Throttle position sensor
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a. Connect the test harness- TPS 5RU (3P) "1"
to the throttle position sensor and wire har-
ness as shown.
b. Connect the digital circuit tester (DCV) to the
test harness- TPS 5RU (3P).
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• Positive tester probe →
blue (wire harness color)
• Negative tester probe →
black/blue (wire harness color)
8-147
1
2
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Coolant temperature sensor
18 Nm (1.8 m·kgf, 13 ft·lbf)
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Test harness– TPS 5RU (3P)
90890-03230
Digital circuit tester
90890-03174
Model 88 Multimeter with ta-
chometer
YU-A1927
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