ELECTRICAL COMPONENTS
9-106
b. Measure the radiator fan motor circuit break-
er resistance.
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EBS30312
CHECKING THE COOLANT TEMPERATURE
SENSOR
1. Remove:
• Coolant temperature sensor
EWB02950
• Handle the coolant temperature sensor
with special care.
• Never subject the coolant temperature sen-
sor to strong shocks. If the coolant tem-
perature 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 × 1k or Ω × 100)
to the coolant temperature sensor terminals
as shown.
b. Immerse the coolant temperature sensor “1”
in a container filled with coolant “2”.
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 temperatures.
e. Measure the coolant temperature sensor re-
sistance.
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3. Install:
• Coolant temperature sensor
EBS30313
CHECKING THE THROTTLE POSITION
SENSOR
1. Remove:
• Throttle position sensor
(from the throttle body)
EWB03070
• Handle the throttle position sensor with
special care.
• Never subject the throttle position sensor
to strong shocks. If the throttle position
sensor is dropped, replace it.
2. Check:
• Throttle position sensor maximum resistance
Out of specification → Replace the throttle
position sensor.
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a. Connect the pocket tester (Ω × 1k) to the
throttle position sensor terminals as shown.
Coolant temperature sensor re-
sistance
2.32–2.59 kΩ at 20 °C (68 °F)
310–326 Ω at 80 °C (176 °F)
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Coolant temperature sensor
20 Nm (2.0 m·kgf, 14 ft·lbf)
Resistance
2.64–6.16 kΩ
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
blue “1”
• Negative tester probe →
black/blue “2”
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