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Ambient Temperature Sensor: Inspection

  1. INSPECT AMBIENT TEMPERATURE SENSOR 
    1. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      B5-1 - B5-2 10°C (50°F) 3.00 to 3.73 kΩ
      B5-1 - B5-2 15°C (59°F) 2.45 to 2.88 kΩ
      B5-1 - B5-2 20°C (68°F) 1.95 to 2.30 kΩ
      B5-1 - B5-2 25°C (77°F) 1.60 to 1.80 kΩ
      B5-1 - B5-2 30°C (86°F) 1.28 to 1.47 kΩ
      B5-1 - B5-2 35°C (95°F) 1.00 to 1.22 kΩ
      B5-1 - B5-2 40°C (104°F) 0.80 to 1.00 kΩ
      B5-1 - B5-2 45°C (113°F) 0.65 to 0.85 kΩ
      B5-1 - B5-2 50°C (122°F) 0.50 to 0.70 kΩ
      B5-1 - B5-2 55°C (131°F) 0.44 to 0.60 kΩ
      B5-1 - B5-2 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.

      HINT:

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

      If the resistance is not as specified, replace the ambient temperature sensor.

      Fig 1: Identifying Ambient Temperature Sensor Connector Terminals And Graph
      G05831395Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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