ROOM TEMPERATURE SENSOR INSPECTION


  1. INSPECT ROOM TEMPERATURE SENSOR (COOLER THERMISTOR)


    1. A01I5PAE54
      Text in Illustration
      *a

      Component without harness connected

      (Room Temperature Sensor (Cooler Thermistor))
      *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
      I57-1 (+) - I57-2 (-) 10°C (50°F) 3.00 to 3.73 kΩ
      I57-1 (+) - I57-2 (-) 15°C (59°F) 2.45 to 2.88 kΩ
      I57-1 (+) - I57-2 (-) 20°C (68°F) 1.95 to 2.30 kΩ
      I57-1 (+) - I57-2 (-) 25°C (77°F) 1.60 to 1.80 kΩ
      I57-1 (+) - I57-2 (-) 30°C (86°F) 1.28 to 1.47 kΩ
      I57-1 (+) - I57-2 (-) 35°C (95°F) 1.00 to 1.22 kΩ
      I57-1 (+) - I57-2 (-) 40°C (104°F) 0.80 to 1.00 kΩ
      I57-1 (+) - I57-2 (-) 45°C (113°F) 0.65 to 0.85 kΩ
      I57-1 (+) - I57-2 (-) 50°C (122°F) 0.50 to 0.70 kΩ
      I57-1 (+) - I57-2 (-) 55°C (131°F) 0.44 to 0.60 kΩ
      I57-1 (+) - I57-2 (-) 60°C (140°F) 0.36 to 0.50 kΩ

      If the resistance is not as specified, replace the room temperature sensor (cooler thermistor).

      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.

      Tech Tips

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