Lexus IS250 · Service Manual HEATER & AIR CONDITIONING SYSTEM

INSPECTION

Inspection


REMOVE SMOG VENTILATION SENSOR

  1. E107006E07
    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.

  1. E107006E08
    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.

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