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Air Fuel Ratio Sensor: Inspection

  1. INSPECT AIR FUEL RATIO SENSOR (for Sensor 1) 
    1. Using an ohmmeter, measure resistance between the terminals.

    Standard resistance 

    STANDARD RESISTANCE

    Terminal No. Resistance
    1 (HT) ← → 2 (+B) 11 to 16 Ω at 20°C (68°F)
    1 (HT) ← → 4 (E1) 10 kΩ or higher
    Fig 1: Identifying Air Fuel Ratio Sensor Terminals
    G04962746Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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