Aqs flaps

sarge2771 · Feb 23rd, 2019, 01:04

Hi all , just purchased xc90 D5 2006
Got an error code for the air quality sensor
I’ve located the sensor .
the bottom flap closes when pressing air con or air circulation buttons but top flap doesn’t seem to be connected to anything
There is no resistance or anything
My question is is the top flap supposed to be connected to anything
If it is how or where do I look
Thanks Gary

gmonag · Feb 23rd, 2019, 09:32

An internal fault in the AQS can take down the LIN bus that controls the climate control system.
Remove the AQS. The climate control and passenger seat heater (if fitted) should then work normally. Replace the AQS if you want the auto-recirculation function to work, otherwise leave it out.

sarge2771 · Feb 23rd, 2019, 13:42

Hi gmonag, thanks for the reply
Yes new aqs part ordered but what I want to know is are the flaps linked / connected together by cable / rod as top flaps have no resistance at all and don’t seem to be connected to anything where as bottom flaps seem like there on a motor and have resistance
Thanks Gary

gmonag · Feb 23rd, 2019, 16:20

All the flaps are moved by individual stepper motors.

sarge2771 · Feb 23rd, 2019, 19:22

Where would I find these stepper motors behind glovebox ? Or through engine bay?

gmonag · Feb 23rd, 2019, 20:36

Behind the dashboard. But test the system first without the AQS - you may find everything works OK.

Just to be sure - are you sure you located the AQS! It is fitted in the cabin air intake under the windscreen scuttle.

sarge2771 · Feb 23rd, 2019, 22:17

Yeah im sure passenger side under screen just in front of air intake.
My top flap doesn’t seem to work I’m able to flick it and it closes, but bottom flap closes when I press air conditioning button/ circulation button and opens when cancelling.
You say behind dash ? Inside car or from under scuttle
If it’s too much hassle I will just replace aqs and leave flaps don’t fancy taking dash out

gmonag · Feb 23rd, 2019, 23:22

Inside car

SwissXC90 · Feb 25th, 2019, 05:13

I do not think there is a top flap.
Only one flap is electrically controlled, and that is inside the car.

sarge2771 · Feb 25th, 2019, 11:08

There are definitely 2 flaps under the windscreen scuttle
In the engine bay but don’t know if there connected to each other

Feb 23rd, 2019, 01:04	#1
sarge2771 New Member Last Online: Apr 21st, 2024 08:40 Join Date: Aug 2017 Location: HULL	Aqs flaps Hi all , just purchased xc90 D5 2006 Got an error code for the air quality sensor I’ve located the sensor . the bottom flap closes when pressing air con or air circulation buttons but top flap doesn’t seem to be connected to anything There is no resistance or anything My question is is the top flap supposed to be connected to anything If it is how or where do I look Thanks Gary

Feb 23rd, 2019, 09:32	#2
gmonag Premier Member Last Online: Jan 15th, 2024 17:24 Join Date: Jun 2010 Location: Bury St Edmunds	An internal fault in the AQS can take down the LIN bus that controls the climate control system. Remove the AQS. The climate control and passenger seat heater (if fitted) should then work normally. Replace the AQS if you want the auto-recirculation function to work, otherwise leave it out. __________________ Greg

Feb 23rd, 2019, 16:20	#4
gmonag Premier Member Last Online: Jan 15th, 2024 17:24 Join Date: Jun 2010 Location: Bury St Edmunds	All the flaps are moved by individual stepper motors. __________________ Greg

Feb 23rd, 2019, 20:36	#6
gmonag Premier Member Last Online: Jan 15th, 2024 17:24 Join Date: Jun 2010 Location: Bury St Edmunds	Behind the dashboard. But test the system first without the AQS - you may find everything works OK. Just to be sure - are you sure you located the AQS! It is fitted in the cabin air intake under the windscreen scuttle. __________________ Greg Last edited by gmonag; Feb 23rd, 2019 at 20:38.

Feb 23rd, 2019, 23:22	#8
gmonag Premier Member Last Online: Jan 15th, 2024 17:24 Join Date: Jun 2010 Location: Bury St Edmunds	Inside car __________________ Greg

Feb 23rd, 2019, 13:42	#3
sarge2771 New Member Last Online: Apr 21st, 2024 08:40 Join Date: Aug 2017 Location: HULL	Hi gmonag, thanks for the reply Yes new aqs part ordered but what I want to know is are the flaps linked / connected together by cable / rod as top flaps have no resistance at all and don’t seem to be connected to anything where as bottom flaps seem like there on a motor and have resistance Thanks Gary

Feb 23rd, 2019, 19:22	#5
sarge2771 New Member Last Online: Apr 21st, 2024 08:40 Join Date: Aug 2017 Location: HULL	Where would I find these stepper motors behind glovebox ? Or through engine bay?

Feb 23rd, 2019, 22:17	#7
sarge2771 New Member Last Online: Apr 21st, 2024 08:40 Join Date: Aug 2017 Location: HULL	Yeah im sure passenger side under screen just in front of air intake. My top flap doesn’t seem to work I’m able to flick it and it closes, but bottom flap closes when I press air conditioning button/ circulation button and opens when cancelling. You say behind dash ? Inside car or from under scuttle If it’s too much hassle I will just replace aqs and leave flaps don’t fancy taking dash out

Feb 25th, 2019, 05:13	#9
SwissXC90 Premier Member Last Online: Mar 20th, 2024 18:26 Join Date: Jan 2016 Location: Cross Country	I do not think there is a top flap. Only one flap is electrically controlled, and that is inside the car. __________________ XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.

Feb 25th, 2019, 11:08	#10
sarge2771 New Member Last Online: Apr 21st, 2024 08:40 Join Date: Aug 2017 Location: HULL	There are definitely 2 flaps under the windscreen scuttle In the engine bay but don’t know if there connected to each other

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