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Air Fuel Ratio Sensor: Inspection

  1. INSPECT AIR FUEL RATIO SENSOR 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard resistance 

        RESISTANCE SPECIFICATION

        Tester Connection Condition Specified Condition
        2 (+B) - 1 (HT) 20°C (68°F) 1.8 a to 3.4 Ω
        2 (HT) - 1 (AF-) - 10 kΩ or higher

        If the resistance is not as specified, replace the air fuel ratio sensor.

        Fig 1: Identifying Air Fuel Ratio Sensor Connector Terminals
        G05387003Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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