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Air Fuel Ratio Sensor Relay: Inspection

  1. INSPECT AIR FUEL RATIO SENSOR RELAY 
    1. Inspect A/F relay
      1. Using an ohmmeter, measure the resistance between the terminals.
        Fig 1: Identifying Air Fuel Ratio Sensor Relay Terminal
        G04996556Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Specified Condition
        1F-1 - 1C-6 10 kΩ or higher
        1F-1 - 1C-6 Below 1 Ω (Apply battery voltage to terminals 1D-5 and 1H-2)

        If the result is not as specified, replace the engine room junction block assembly.

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