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Cabin temperature sensor calibration on Discovery 4
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French Collection
 


Member Since: 15 Apr 2020
Location: Aix-en-Provence
Posts: 48

France 2013 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4
Cabin temperature sensor calibration on Discovery 4

Does anyone know if it is possible to re-calibrate the cabin temperature sensor on a Discovery 4?

Mine reads high by about 8 degrees, which is obviously confusing the climate control.

I already cleaned the sensor which was completely blocked with dust.

Thanks for reading.
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Post #23547772nd Dec 2023 6:40 pm
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faulksy
 


Member Since: 24 Dec 2023
Location: powys
Posts: 304

Wales 2012 Discovery 4 3.0 SDV6 HSE Auto Orkney GreyDiscovery 4

If you don't mind me asking. Were is the cabin sensor you cleaned ?

Thanks
  
Post #235675624th Dec 2023 4:57 pm
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French Collection
 


Member Since: 15 Apr 2020
Location: Aix-en-Provence
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France 2013 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

It's to the left of the steering column on a RHD car, behind a little square grille about where your left knee would be. You need to remove that panel that the grille is set into.
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Post #235677024th Dec 2023 7:28 pm
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 14103

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

May I ask plse apart from the one by the steering wheel is there another sensor behind that square grill by on the centre of the dashboard by the windscreen plse

Sorry if you’ve already checked that or I’m thinking of something else

Ie, this one if that may be faulty ??

https://www.ebay.co.uk/itm/T1-Land-Rover-D...3324173687
   
Post #235678224th Dec 2023 9:31 pm
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Gary_P
 


Member Since: 03 May 2016
Location: Kent
Posts: 1645

Ukraine 2016 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

I know there’s a microphone there somewhere. Wondered if it’s that?
Merry Christmas
 Gary
-------------------------------------------

Discovery 4 HSE 2016MY 
 
Post #235679925th Dec 2023 9:27 am
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French Collection
 


Member Since: 15 Apr 2020
Location: Aix-en-Provence
Posts: 48

France 2013 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

You mean in the interior light cluster? See photo. Could be. I think the mic is the little circular piece in front of the light.
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Post #235680025th Dec 2023 10:39 am
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faulksy
 


Member Since: 24 Dec 2023
Location: powys
Posts: 304

Wales 2012 Discovery 4 3.0 SDV6 HSE Auto Orkney GreyDiscovery 4

French Collection wrote:
It's to the left of the steering column on a RHD car, behind a little square grille about where your left knee would be. You need to remove that panel that the grille is set into.

thank you Thumbs Up
 had a d1 ,d2 a land mark d4 for 3 days now have awsome d4 in orkney grey hse sdv6 my12  
Post #235683325th Dec 2023 10:43 pm
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 14103

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Apologises as looking further that sensor in the link is a sunlight sensor

Indeed as u say with ref the cabin temp sensor , ie

The in-vehicle temperature sensor is a NTC thermistor installed behind a grill in the instrument panel, on the inboard side of the steering column. The sensor is connected to a tube, the other end of which is connected to a venturi on the side casing of the heater. An air bleed from the heater, through the venturi, induces a flow of air down the tube, which draws cabin air through the grill and over the sensor.

Managed to find the air cabin sensor wiring in case it’s useful

Wonder if a hard reset would help , along with maybe seeing how much it’s out by using one of those handheld temperature laser readers that also show the air temperature , or maybe the other end of the tube is blocked ?

Or maybe the sensor itself is faulty , Sorry if you’ve already done that


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Post #235683726th Dec 2023 12:33 am
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French Collection
 


Member Since: 15 Apr 2020
Location: Aix-en-Provence
Posts: 48

France 2013 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

I will take the panel off again and clean the sensor with a cotton bud and some alcohol and also check that the tube connected to the back of the sensor for sucking air past it is not blocked further down.

I did check check the temperature with a separate hand held gauge which is how I know it it reading too high.
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Post #235683826th Dec 2023 7:16 am
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garrycol
 


Member Since: 06 Dec 2010
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Australia 

On warm sunny days the body feels the temp as a little higher than it is. On dull wintery days the body feels that the temp is a bit lower than it is.

Land Rover in their wisdom has incorporated this into the climate control system via the little bubble sensor in the front centre of the dash. It is basically a light sensor and I think it also controls the lights coming on but not sure.

What this sensor does is to tell the climate control to lower the A/C temp a couple of degrees on a bright sunny day from that set by the temp sensor and to raise the A/C temp a couple of degrees when it is overcast etc. Not sure what happens at night.

So the temp you read near the temp sensor may not be correct anyway. I have stick on temp gauge near the system temp gauge and it is always reading a few degrees higher that the temp set of the temp dials.

Garry
  
Post #235684126th Dec 2023 10:08 am
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French Collection
 


Member Since: 15 Apr 2020
Location: Aix-en-Provence
Posts: 48

France 2013 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

Thanks got this info. My problem was on cold dark winter mornings, no problem in summer.
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Post #235684226th Dec 2023 11:11 am
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 14103

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

French Collection wrote:
I will take the panel off again and clean the sensor with a cotton bud and some alcohol and also check that the tube connected to the back of the sensor for sucking air past it is not blocked further down.

I did check check the temperature with a separate hand held gauge which is how I know it it reading too high.


Hope u get it resolved Thumbs Up
   
Post #235684326th Dec 2023 11:33 am
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 14103

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

garrycol wrote:
On warm sunny days the body feels the temp as a little higher than it is. On dull wintery days the body feels that the temp is a bit lower than it is.

Land Rover in their wisdom has incorporated this into the climate control system via the little bubble sensor in the front centre of the dash. It is basically a light sensor and I think it also controls the lights coming on but not sure.

What this sensor does is to tell the climate control to lower the A/C temp a couple of degrees on a bright sunny day from that set by the temp sensor and to raise the A/C temp a couple of degrees when it is overcast etc. Not sure what happens at night.

So the temp you read near the temp sensor may not be correct anyway. I have stick on temp gauge near the system temp gauge and it is always reading a few degrees higher that the temp set of the temp dials.

Garry


Hiya

Many thks for the details , great to learn new things Thumbs Up

As a side note because I didn’t have a cabin temperature gauge in my D3 I got one of the plug in ones, then later a proper gauge after fitting a gauge panel, was quite surprised they were virtually the same , in the end removed the plug in one for some USB ports

Thks again for sharing the very helpful information


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Post #235684626th Dec 2023 11:48 am
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French Collection
 


Member Since: 15 Apr 2020
Location: Aix-en-Provence
Posts: 48

France 2013 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

I removed the sensor and cleaned it with a cotton bud and alcohol. It was quite dirty.

When I the sensor out I blew compressed air down the tube.

I will post again in a few days with a status update.
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Post #235685326th Dec 2023 2:02 pm
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gstuart
 


Member Since: 21 Oct 2016
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United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Hope that’s worked for u Thumbs Up
   
Post #235685426th Dec 2023 2:03 pm
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