AMBIENT TEMPERATURE SENSOR INSPECTION


  1. INSPECT AMBIENT TEMPERATURE SENSOR (THERMISTOR ASSEMBLY)


    1. A01I1VYE17
      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

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

      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).