Operation Manual

ELECTRICAL COMPONENTS
8-139
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a. Disconnect the radiator fan motor coupler
from the wire harness.
b. Connect the battery (DC 12 V) as shown.
c. Measure the radiator fan motor movement.
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EAS28260
CHECKING THE COOLANT TEMPERATURE
SENSOR
1. Remove:
• Coolant temperature sensor
Refer to “THERMOSTAT” on page 6-7.
WARNING
EWA14130
• Handle the coolant temperature sensor
with special care.
• Never subject the coolant temperature
sensor to strong shocks. If the coolant
temperature sensor is dropped, replace it.
2. Check:
• Coolant temperature sensor resistance
Out of specification → Replace.
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a. Connect the pocket tester (Ω × 100/ × 1k)
to the coolant temperature sensor termi-
nals as shown.
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.
d. Heat the coolant or let it cool down to the
specified temperature.
e. Measure the coolant temperature sensor
resistance.
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3. Install:
• Coolant temperature sensor
EAS28300
CHECKING THE THROTTLE POSITION
SENSOR
1. Remove:
• Throttle position sensor
(from the throttle body)
2. Check:
• Throttle position sensor
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a. Connect the pocket tester (Ω × 1 k) to the
throttle position sensor as shown.
b. Measure the throttle position sensor maxi-
mum resistance.
Out of specification → Replace the throttle
position sensor.
• Positive battery terminal →
Blue “1”
• Negative battery terminal →
Black “2”
Coolant temperature sensor
resistance
2.32–2.59 kΩ at 20 °C (68 °F)
310.0–326.0 Ω at 80 °C (176 °F)
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Coolant temperature sensor
18 Nm (1.8 m·kgf, 13 ft·lbf)
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
Blue “1”
• Negative tester probe →
Black/blue “2”
2
3
1