Smog Ventilation Sensor Inspection

Heater & Air Conditioning System. Lexus Is250, Is220D. Gse20 Ale20
Air Conditioning. Lexus Is250, Is220D. Gse20 Ale20

  1. INSPECT SMOG VENTILATION SENSOR

Smog Ventilation Sensor -- Inspection



1. INSPECT SMOG VENTILATION SENSOR


    Lexus Is250, Is220D. Gse20 Ale20.Air Conditioning.Air Conditioning System.Smog Ventilation Sensor Inspection

  1. HC, CO

    1. Apply battery voltage between terminals 3 (IG) and 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.
      HINT:
      The resistance before blowing exhaust gas is 10 kΩ to 40 kΩ.
      If the resistance is not as specified, replace the smog ventilation sensor.


    Lexus Is250, Is220D. Gse20 Ale20.Air Conditioning.Air Conditioning System.Smog Ventilation Sensor Inspection

  1. NOx

    1. Apply battery voltage between terminals 3 (IG) and 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.
      HINT:
      The resistance before blowing exhaust gas is 10 kΩ to 40 kΩ.
      If the resistance is not as specified, replace the smog ventilation sensor.