AMBIENT TEMPERATURE SENSOR INSPECTION

PROCEDURE


  1. INSPECT COOLER (AMBIENT TEMPERATURE SENSOR) THERMISTOR


    1. A000UZ9E01
      Text in Illustration
      *a

      Component without harness connected:

      (Cooler (Ambient Temperature Sensor) Thermistor)
      *b Sensor Area
      *c Resistance (kΩ)
      *d Temperature (°C (°F))

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

      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

      Note


      • Touching the sensor even slightly may change the resistance value. Hold the connector of the sensor.


      • When measuring the resistance, 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 result is not as specified, replace the cooler (ambient temperature sensor) thermistor.