Checking The Intake Air Temperature Sensor - Yamaha Vmax VMX17C 2009 Service Manual

1. Check:
• Intake air pressure sensor output voltage
Out of specification → Replace.
Intake air pressure sensor output
voltage
3.57–3.71 V
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a. Connect the pocket tester (DC 20 V) to the in-
take air pressure sensor coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
pink/white "1"
• Negative tester probe →
black/blue "2"
2
b. Turn the main switch to "ON".
c. Measure the intake air pressure sensor out-
put voltage.
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EAS28420
CHECKING THE INTAKE AIR
TEMPERATURE SENSOR
1. Remove:
• Intake air temperature sensor
(from the coupler holder)
EWA14110
WARNING
• Handle the intake air temperature sensor
with special care.
• Never subject the intake air temperature
sensor to strong shocks. If the intake air
temperature sensor is dropped, replace it.
2. Check:
• Intake air temperature sensor resistance
Out of specification → Replace.
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B/L P/W L
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8-140
ELECTRICAL COMPONENTS
Intake air temperature sensor re-
sistance
290–390 Ω at 80 °C (176 °F)
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a. Connect the pocket tester (Ω × 100) to the in-
take air temperature sensor terminals as
shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
b. Immerse the intake air temperature sensor
"1" in a container filled with water "2".
TIP
Make sure that the intake air temperature sensor
terminals do not get wet.
c. Place a thermometer "3" in the water.
3
1
d. Slowly heat the water, then let it cool down to
the specified temperature.
e. Measure the intake air temperature sensor
resistance.
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M MMM M M MMM M MMM
2
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