AMBIENT TEMPERATURE SENSOR INSPECTION


  1. INSPECT AMBIENT TEMPERATURE SENSOR (THERMISTOR ASSEMBLY)


    1. A01ET8SE17
      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))

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

      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

      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).

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