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Air Fuel Ratio Sensor: Inspection

  1. INSPECT AIR FUEL RATIO SENSOR 
    1. Measure the resistance between terminals 1 (HT) and 2 (+B).

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION

      Condition Specified Condition
      20°C (68°F) 1.8 to 3.4 Ω

      If the result is not as specified, replace the sensor.

      Fig 1: Identifying Air Fuel Ratio Sensor
      G04975184Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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