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Ambient Temperature Sensor: Inspection: Inspection

WARNING: This page is about a different variant/trim than selected.
  1. INSPECT AMBIENT TEMPERATURE SENSOR (THERMISTOR ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 1: Inspecting Ambient Temperature Sensor
      GTY337512Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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

      If the resistance is not as specified, replace the ambient temperature sensor (thermistor assembly).

      TEXT IN ILLUSTRATION

      *1 Sensing Portion
      *2 Resistance (kΩ)
      *3 Allowable Range
      *4 Temperature (°C (°F))
      *a Component without harness connected
      (Ambient Temperature Sensor (Thermistor Assembly))
      NOTE:
      • Hold the sensor only by its connector. Touching the sensor may change the resistance value.
      • When measuring, the sensor temperature must be the same as the ambient temperature.

      HINT: 

      As the temperature increases, the resistance decreases (see the graph).

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