>
Hyundai Equus Manuals

Hyundai Equus: Air Quality Sensor (AQS) Repair procedures - Air Conditioning System - Heating, Ventilation and Air Conditioning - Hyundai Equus VI 2009-2025 Service ManualHyundai Equus: Air Quality Sensor (AQS) Repair procedures

Second generation VI (2009–2025) / Hyundai Equus VI 2009-2025 Service Manual / Heating, Ventilation and Air Conditioning / Air Conditioning System / 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 ground
3. AQS signal

Specification
Condtion
 Output Signal (V)
 Intake Control State
Intake Feedback (V)
Preheating
2.5 ± 0.55
maintain previous state
maintain previous state
Below standard inflow of polluted air
4.3 ± 0.55
Fresh air
0.3
Above standard inflow of polluted air
0.9 ± 0.55
Recirculated air
4.7

4.
AQS diagnosis and fail safe
A.
With the ignition switch turned ON, it does not judge whether it has failed or not while the AQS sensor is preheating (35 ± 2 sec.). It is judged after 40 seconds the ignition switch has been turned ON.
B.
At this time, if the AQS output is out of normal range, the AQS is turned off.
C.
But, if the AQS is OPEN/SHORT, the AQS will turn off right after the ignition switch is turned ON regarding it as a malfunction.
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the front bumper.
(Refer to Body - "Front Bumper Cover")
3.
Disconnect the smart cruise control unit connector (A).
4.
Loosen the bolts and then remove the smart cruise control unit bracket (B).

5.
Disconnect the connector (A) and then remove the AQS (B).
[Smart Cruise Control system]

[Non-Smart Cruise Control system]

6.
Install in the reverse order of removal.
    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. A ...

    Auto Defogging Sensor Description and Operation
    Description The auto defogging sensor is installed on the front window glass. The sensor judges and sends signal if moisture occurs to blow out wind for defogging. The air conditioner control m ...

    See also:

    General Information
    Identification Number Locations Identification Number Description Vehicle Identification Number 1. World Manufacturer Identifier (WMI) - KMF : Commercial vehicle (Van) - KMH : Passenger vehicl ...

    Steering gear box, linkage & boots/lower arm ball joint
    With the vehicle stopped and engine off, check for excessive free-play in the steering wheel. Check the linkage for bends or damage. Check the dust boots and ball joints for deterioration, cracks ...

    Rear Seat Assembly Repair procedures
    Replacement [Rear Seat Cushion Assembly] 1. Pull it up and remove the rear seat cushion assembly (A). 2. Install in the reverse order of removal.     • Make sure the ...

    Categories

    Hyundai Equus Manuals

    © 2011-2025 Copyright www.heqmanual.com