Checking The Intake Air Pressure Sensor; Checking The Intake Air Temperature Sensor - Yamaha MBK XMAX 2014 Service Manual

• Positive tester probe →
yellow (wire harness color)
• Negative tester probe →
black/blue (wire harness color)
e. While slowly opening the throttle, check that
the throttle position sensor voltage is in-
creased.
Voltage does not change or it changes
abruptly → Replace the throttle position sen-
sor.
Out of specification (closed position) → Re-
place the throttle position sensor.
Throttle position sensor voltage
(closed position)
0.40–0.90 V
(yellow–black/blue)
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EAS28410
CHECKING THE INTAKE AIR PRESSURE
SENSOR
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 test harness-TPS (3P) "1" to the
atmospheric pressure sensor and wire har-
ness as shown.
b. Connect the digital circuit tester (DCV) to the
test harness-TPS (3P).
Test harness– TPS (3P)
90890-03204
YU-03204
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
pink/white (wire harness color)
• Negative tester probe →
black/blue (wire harness color)
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ELECTRICAL COMPONENTS
c. Turn the main switch to "ON".
d. 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 air filter case)
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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a. Connect the pocket tester (Ω × 1k) to the in-
take air temperature sensor terminal as
shown.
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.
8-148
1
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Intake air temperature sensor re-
sistance
2.21–2.69 kΩ
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Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
▲ ▲▲▲ ▲ ▲▲▲
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