SMOG VENTILATION SENSOR INSPECTION

PROCEDURE


  1. INSPECT SMOG VENTILATION SENSOR


    1. A000875E39
      Text in Illustration
      *a

      Component without harness connected

      (Smog Ventilation Sensor)

      HC, CO


      1. Connect a auxiliary battery positive (+) lead to terminal 3 (IG) and a negative (-) lead to terminal 6 (E).

      2. Allow exhaust gas (HC, CO) to travel to the sensing portion of the 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 increases.

        Tech Tips

        The resistance of the sensor before being exposed to exhaust gas is 10 kΩ to 40 kΩ.

        If the result is not as specified, replace the smog ventilation sensor.

    2. A000875E40
      Text in Illustration
      *a

      Component without harness connected

      (Smog Ventilation Sensor)

      NOx


      1. Connect a auxiliary battery positive (+) lead to terminal 3 (IG) and a negative (-) lead to terminal 6 (E).

      2. Allow exhaust gas (NOx) to travel to the sensing portion of the 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 of the sensor before being exposed to exhaust gas is 10 kΩ to 40 kΩ.

        If the result is not as specified, replace the smog ventilation sensor.