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Air Fuel Ratio Sensor: Inspection

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT AIR FUEL RATIO SENSOR 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Specified Condition
        1 (HA1A) - 2 (+B) 1.8 to 3.4 ohms at 20°C (68°F)
        1 (HA1A) - 4 (E2) 10 k ohms or higher

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

        Fig 1: Measuring Resistance Between Air Fuel Ratio Sensor Terminals
        G04829164Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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