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Air Fuel Ratio Sensor: Inspection: Inspection

  1. INSPECT AIR FUEL RATIO SENSOR (for Bank 1) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 1: Identifying +B, HA1A & A1A- Connector
      GTY101994Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (HA1A) - 2 (+B) 20°C (68°F) 1.8 to 3.4 Ω
      1 (HA1A) - 4 (A1A-) Always 10 kΩ or higher

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

  2. INSPECT AIR FUEL RATIO SENSOR (for Bank 2) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 2: Identifying +B, HA2A & A2A- Connector
      GTY102182Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (HA2A) - 2 (+B) 20°C (68°F) 1.8 to 3.4 Ω
      1 (HA2A) - 4 (A2A-) Always 10 kΩ or higher

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

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