Climate Control Exhaust Gas Sensor: Testing and Inspection

Air quality sensor, checking

Note! The illustrations in this service information are used for different model years and/or models. Some variation may occur. However, the essential information in the illustrations is always correct.

Preparatory work

Preparatory work
Remove the cowl. See Plenum chamber Service and Repair.

Check

Checking air quality sensor (AQS)




Start the car with the climate control system automatic button in the ON position.
Spray a little rust solvent or windshield washer fluid from a spray bottle in the area around the air quality sensor.

Note! Only spray a little.

If the air quality sensor and the other electronics are fault free, the damper for the air intake should close within a short period of time.
If the air quality sensor is fault free, the damper will gradually open after approximately 15 seconds.

Finishing

Finishing
Wipe away any fluid around the air quality sensor (AQS).
Install the cowl. See: Plenum chamber Service and Repair.