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Hyundai Equus: Air Quality Sensor (AQS) Description and Operation - Air Conditioning System - Heating, Ventilation and Air Conditioning - Hyundai Equus VI 2009-2024 Service ManualHyundai Equus: Air Quality Sensor (AQS) Description and Operation

Desciption
The Air Quality Sensor (AQS) is located at the center support in front of the engine radiator. It detects hazardous elements in ambient air providing output signal to the control.
AQS will detect sulfurous acid gas, carbon dioxide, carbon monoxide, hydrocarbon and allergen.
    Ambient Temperature Sensor Repair procedures
    Inspection 1. Turn the ignition switch OFF. 2. Remove the front bumper. (Refer to Body - "Front Bumper Cover") 3. Disconnect ambient temperature sensor. 4. Check the resistance of the ...

    Air Quality Sensor (AQS) Repair procedures
    Inspection 1. Turn the ignition switch OFF. 2. Connect the GDS. 3. Check the output voltage of AQS between terminal 2 and 3. 1. DC 12V( Ignition)2. Sensor ground3. AQS signal Specif ...

    See also:

    Fuel Pressure Control Valve Schematic Diagrams
    Circuit Diagram ...

    Engine compartmen
    1. Engine coolant reservoir 2. Radiator cap   3. Brake fluid reservoir 4. Air cleaner 5. Engine oil dipstick 6. Engine oil filler cap 7. Windshield washer fluid reservoir 8. Fuse box 9. ...

    Operating Door Locks From Inside the Vehicle
    With the Door Lock Button : To unlock a door, push the door lock button (1) to the “Unlock” position. The red mark (2) on the door lock button will be visible. To lock a door, push the door ...

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