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philhunt
Member Since: 16 Sep 2007
Location: MI5 not 9 to 5
Posts: 1761
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This function seems to have been working ok on my motor until this morning when I came out of a tunnel in to bright daylight and could see from the reflection on the car in front that, even after 5 minutes, the headlights were on.
I understand that the sensor is near to or part of the rain sensor on the inside of the screen by the rear view mirror - my screen is clean.
Any ideas?
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23rd Nov 2007 6:09 pm |
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countrywide
Member Since: 16 Sep 2007
Location: UK
Posts: 6019
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I had that for the last couple of days and it seemed to have something to do with having the Land Rover button programmed on the key for switching the headlights on. I switched of the engine and turned the follow me home lights off with the Land Rover button on the key, started the engine and it all worked again as normal.
Maybe just luck, but it seemed to work.
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23rd Nov 2007 6:17 pm |
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philhunt
Member Since: 16 Sep 2007
Location: MI5 not 9 to 5
Posts: 1761
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I haven't (knowingly) programmed anything in to the button on my key but I guess the previous owner may have done at some stage and I may have pressed it unintentionally during the course of yesterday.
I'll swap keys in the morning and see if the problem has gone away
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23rd Nov 2007 6:23 pm |
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DG
Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50973
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The sensor is only acting on ambient lighting conditions ..it may be that the angle of the sun was higher or lower in the sky or the sunlight was coming in from a different direction. I wouldn't worry too much TBH
GTR wrote:The automatic headlamp function is a driver assistance system. The driver can override the system operation by selection of side lamp or headlamp on if the ambient light conditions require front and rear lighting to be active. The automatic headlamp system uses a light sensor and the CJB, which are connected via the LIN bus to control the headlamp functionality.
A light sensor is incorporated in the rain/light sensor located on the inside of the windshield, below the rear view mirror. The wiper system also uses the rain/light sensor for automatic wiper operation.
The light sensor measures the ambient light around the vehicle in a vertical direction and also the angular light level from the front of the vehicle. The rain/light sensor uses vehicle speed signals, wiper switch position and the park position of the front wipers to control the system.
The automatic headlamp operation uses ambient light levels which are monitored by photodiode incorporated in the rain/light sensor. The rain/light sensor sends a lights on/off request to the CJB on the LIN bus, which responds by switching on the low beam headlamps, front side lamps and rear tail lamps.
The automatic headlamps are activated under the following conditions:
Twilight
Darkness
Rain
Snow
Tunnels
Underground or multistoried car parks.
Operation of the automatic headlamps requires the ignition switch to be in position II, the lighting control switch to be in the 'AUTO' position and a lights on request signal from the light sensor.
21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
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23rd Nov 2007 6:34 pm |
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ronp
Member Since: 29 Nov 2006
Location: North Yorkshire
Posts: 15258
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Personally I think they're a waste of time!
I'd rather be in control and switch them on/off when I want to.
But that's only my opinion.
...... always on the road less travelled 🚧
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23rd Nov 2007 7:49 pm |
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10forcash
Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534
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go on Ron! use the magic of opposable thumbs
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23rd Nov 2007 7:57 pm |
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philhunt
Member Since: 16 Sep 2007
Location: MI5 not 9 to 5
Posts: 1761
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countrywide wrote:I had that for the last couple of days and it seemed to have something to do with having the Land Rover button programmed on the key for switching the headlights on. I switched of the engine and turned the follow me home lights off with the Land Rover button on the key, started the engine and it all worked again as normal.
Maybe just luck, but it seemed to work.
If it's luck, it also worked for me. Automatic lights fine this morning
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24th Nov 2007 2:45 pm |
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countrywide
Member Since: 16 Sep 2007
Location: UK
Posts: 6019
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Glad it worked. Wish I could claim it was an expert knowledge of Land Rovers, but to be honest it was just luck that I found it worked.
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24th Nov 2007 5:45 pm |
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