Ambient Temperature Sensor Inspection

Vehicle Interior. Corolla. Zre142 Aze141
Heating Air Conditioning. Corolla. Zre142 Aze141

  1. INSPECT AMBIENT TEMPERATURE SENSOR

Ambient Temperature Sensor -- Inspection



1. INSPECT AMBIENT TEMPERATURE SENSOR


    Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Ambient Temperature Sensor  Inspection
  1. Disconnect the connector from the ambient temperature sensor.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    Condition
    Specified Condition
    1 - 2
    10°C (50°F)
    3.00 to 3.73 kΩ
    1 - 2
    15°C (59°F)
    2.45 to 2.88 kΩ
    1 - 2
    20°C (68°F)
    1.95 to 2.30 kΩ
    1 - 2
    25°C (77°F)
    1.60 to 1.80 kΩ
    1 - 2
    30°C (86°F)
    1.28 to 1.47 kΩ
    1 - 2
    35°C (95°F)
    1.00 to 1.22 kΩ
    1 - 2
    40°C (104°F)
    0.80 to 1.00 kΩ
    1 - 2
    45°C (113°F)
    0.65 to 0.85 kΩ
    1 - 2
    50°C (122°F)
    0.50 to 0.70 kΩ
    1 - 2
    55°C (131°F)
    0.44 to 0.60 kΩ
    1 - 2
    60°C (140°F)
    0.36 to 0.50 kΩ
    NOTICE:
    1. Even slightly touching the sensor may change the resistance value. Be sure to hold the connector of the sensor.
    2. When measuring, the sensor temperature must be the same as the ambient temperature.
    HINT:
    As the temperature increases, the resistance decreases (see the graph).
    If the resistance is not as specified, replace the ambient temperature sensor.
    Text in Illustration
    *a
    Component without harness connected
    (Ambient Temperature Sensor)
    *b
    Sensing Portion
    *c
    Resistance (kΩ)
    *d
    Allowable Range
    *e
    Temperature (°C (°F))