Member Since: 30 Jan 2013
Location: Sortland
Posts: 3
Hill decent control fail / suspension lowered during driving
Hope someone can give me an plausible inut regards the problem, as my LR workshop can't...
During normal driving, suddenly a warning "beep" and text "HDC fault" occur. Then after a few seconds a new "beep" and text "Transmission fault, suspension lowered" occurs. and yes, the suspension lowers.
Turn ignition on/off and problem disappears....
Appreciate any good inputs..
Thanks
30th Jan 2013 2:29 pm
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50978
Sounds like a faulty height 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
30th Jan 2013 2:32 pm
polarpal
Member Since: 30 Jan 2013
Location: Sortland
Posts: 3
DG wrote:
Sounds like a faulty height sensor
Why does å height sensor give "transmission fault" ?
30th Jan 2013 8:57 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Sounds more like a brake switch or brake bulb problem.Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 30 Jan 2013
Location: Sortland
Posts: 3
Robbie wrote:
Sounds more like a brake switch or brake bulb problem.
Thanks for reply, but honestly, it doesn't give me more knowledge than my workshop : "we never heard about that prolem before. it can be several things, but our computer doesn't pinpoint anything wrong"
30th Jan 2013 9:05 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
It's the several things that prompts my brake switch / bulb thoughts. The brake light circuit goes direct to the ECU and a wonky brake bulb or sooty switch causes no end of issues. If you search the forum you will find that this fault and cure is not new!Land Rover - Turning Drivers into Mechanics Since 1948
It's the fact that modern cars like the D3 use the same wire for multiple signals, via canbus in this case but others are used too.
An error in one circuit can "fake" an error message for another
The D3 is well known for failed brake light bulbs and or switches to cause these mixed messages, not sure about height sensors, but I guess the same is true.
The other option is a loss of voltage, but you have not eluded to this being a problem as I guess the car still starts?Altox GSM FBH controller thread
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30th Jan 2013 9:11 pm
twoakers
Member Since: 15 Nov 2010
Location: Harwich
Posts: 367
Re: Hill decent control fail / suspension lowered during dri
polarpal wrote:
Hope someone can give me an plausible inut regards the problem, as my LR workshop can't...
During normal driving, suddenly a warning "beep" and text "HDC fault" occur. Then after a few seconds a new "beep" and text "Transmission fault, suspension lowered" occurs. and yes, the suspension lowers.
Turn ignition on/off and problem disappears....
Appreciate any good inputs..
Thanks
This is a fairly common 'fault' with Disco 3 and there are many threads on this forum suggesting how it can be cured
I recently had this annoying fault and how I cured it can be read here:
http://www.disco3.co.uk/forum/topic88642.html
Thanks to various inputs and suggestions from other members
Simple and cheap solution which you can do yourself
i.e as Robbie says change the brake light switch
To really make sure change the rear brake lamps 8)Cheers, Dave in Essex
D3 07 TDV6 HSE
Clubs - Turbo changed, EGR valves replaced, General Grabber ATs, Hawkeye FC reader, Front/rear wishbones, manual gearbox change, autobox flush, cam belt change, HPFP belt change, oil pump change....
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30th Jan 2013 9:13 pm
dragonfly28
Member Since: 08 Jan 2012
Location: South Coast
Posts: 66
Mine did something very similar, but initial message was "transmission fault, special programs not available" followed by suspension lowering. I checked the brake lights, cleaned the brake switch etc to no avail. After a while, switching off/on wouldn't always clear it, so I gave up and booked it in. Fault diagnosed as a faulty gearbox control module, and since then its behaved itself.
Shame that since that visit to the dealer, the parking sensors have had a mind of their own....
30th Jan 2013 10:08 pm
disco4x4au
Member Since: 19 Jan 2006
Location: Perth
Posts: 409
dragonfly28 wrote:
Mine did something very similar, but initial message was "transmission fault, special programs not available" followed by suspension lowering.
The key in a lot of these situations is the order in which the first errors appear. The OP had a different order to yours, hence the suggestions that it's either the brake-switch or bulbs, or a height sensor.
Cheers,
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ex - 2009 D3 TDV6 SE, silver, had lots of stuff too!
Now - 2010 RRS 3.0 TDV6, rimini red, 18" rims + Cooper LTZ, rear eLocker, Spider tuning box, GOE protection plates and rock sliders, GOE 3way shortened rods.
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