ELECTRICAL COMPONENTS
7-107
ET5YU1007
CHECKING THE AIR TEMPERATURE
SENSOR
1. Remove:
• Air temperature sensor
WARNING
EW5YU1002
• Handle the air temperature sensor with
special care.
• Never subject the air temperature sensor to
strong shocks. If the air temperature sen-
sor is dropped, replace it.
2. Check:
• Air temperature sensor resistance
Out of specification → Replace.
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a. Connect the pocket tester (Ω × 100) to the air
temperature sensor terminal as shown.
b. Immerse the air temperature sensor “1” in a
container filled with water “2”.
NOTE:
Make sure that the air temperature sensor termi-
nals do not get wet.
c. Place a thermometer “3” in the water.
d. Slowly heat the water, then let it cool down to
the specified temperature.
e. Measure the air temperature sensor resis-
tance.
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ET5YU1008
CHECKING THE INTAKE SOLENOID
1. Check:
• Intake solenoid resistance
Out of specification → Replace.
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a. Disconnect the intake solenoid coupler from
the intake solenoid.
b. Connect the pocket tester (Ω × 10) to the in-
take solenoid terminal as shown.
c. Measure the intake solenoid resistance.
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ET5YU1005
CHECKING THE MUFFLER COOLING FAN
MOTOR
1. Check:
• Muffler cooling fan motor
Faulty/rough movement → Replace.
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a. Disconnect the muffler cooling fan motor cou-
pler from the wire harness.
b. Connect the battery (DC 12 V) as shown.
Air temperature sensor
resistance
290–390 Ω at 80 °C (176 °F)
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
3
1
2
Intake solenoid resistance
42–48 Ω at 20 °C (68 °F)
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
brown/black “1”
• Negative tester probe
red/white “2”
• Positive tester probe →
blue “1”
• Negative tester probe →
black “2”
Br/B
R/W
1
2
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