AMBIENT TEMPERATURE SENSOR INSPECTION

  1. INSPECT AMBIENT TEMPERATURE SENSOR (THERMISTOR ASSEMBLY)

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

      A011TGQE17
      Standard resistance
      Tester Connection Condition Specified Condition
      A3-1 (-) - A3-2 (+) 10°C (50°F) 3.00 to 3.73 kΩ
      A3-1 (-) - A3-2 (+) 15°C (59°F) 2.45 to 2.88 kΩ
      A3-1 (-) - A3-2 (+) 20°C (68°F) 1.95 to 2.30 kΩ
      A3-1 (-) - A3-2 (+) 25°C (77°F) 1.60 to 1.80 kΩ
      A3-1 (-) - A3-2 (+) 30°C (86°F) 1.28 to 1.47 kΩ
      A3-1 (-) - A3-2 (+) 35°C (95°F) 1.00 to 1.22 kΩ
      A3-1 (-) - A3-2 (+) 40°C (104°F) 0.80 to 1.00 kΩ
      A3-1 (-) - A3-2 (+) 45°C (113°F) 0.65 to 0.85 kΩ
      A3-1 (-) - A3-2 (+) 50°C (122°F) 0.50 to 0.70 kΩ
      A3-1 (-) - A3-2 (+) 55°C (131°F) 0.44 to 0.60 kΩ
      A3-1 (-) - A3-2 (+) 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
      *a

      Component without harness connected

      (Ambient Temperature Sensor (Thermistor Assembly))
      *b Sensing Portion
      *c Resistance (kΩ)
      *d Allowable Range
      *e Temperature (°C (°F))

      Note

      • Even slightly touching the sensor may change the resistance value. Be sure to hold the connector of the sensor.

      • When measuring, the sensor temperature must be the same as the ambient temperature.

      Tech Tips

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