SMOG VENTILATION SENSOR INSPECTION

PROCEDURE


  1. INSPECT COOLER THERMISTOR (SMOG VENTILATION SENSOR)


    1. A01WVG1E08
      Text in Illustration
      *a

      Component without harness connected

      Cooler Thermistor (Smog Ventilation Sensor)

      HC, CO


      1. Apply battery voltage to terminals 3 (IG) and 6 (E).

      2. Allow exhaust gas (HC, CO) to travel to the sensing portion of the cooler thermistor (smog ventilation sensor), and measure the resistance between terminals 1 (SG) and 2 (DGS).

        OK
        When the sensor is exposed to the exhaust gas, the resistance decreases.

        Tech Tips

        The resistance before blowing exhaust gas is 15 to 40 kΩ.

        If the resistance is not as specified, replace the cooler thermistor (smog ventilation sensor).

    2. A01WVG1E09
      Text in Illustration
      *a

      Component without harness connected

      Cooler Thermistor (Smog Ventilation Sensor)

      NOx


      1. Apply battery voltage to terminals 3 (IG) and 6 (E).

      2. Allow exhaust gas (NOx) to travel to the sensing portion of the cooler thermistor (smog ventilation sensor), and measure the resistance between terminals 1 (SG) and 4 (DGS1).

        OK
        When the sensor is exposed to the exhaust gas, the resistance increases.

        Tech Tips

        The resistance before blowing exhaust gas is 2.5 to 40 kΩ.

        If the resistance is not as specified, replace the cooler thermistor (smog ventilation sensor).