Keith Walshe
Member Since: 28 Feb 2005
Location: Sydney
Posts: 53
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| Emgine braking software fault |
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After the latest off-road session I am now convinced that there is a bug in the command shift system.
I run a Tdv6 April05 build.
I tried to proceed down a moderate hill with command shift in 2nd. Just sufficient engine braking but then after a short time there is a violent jar just as if the brakes have slammed on and off. The same thing happens after a further delay of possibly 15 seconds (did not time it).
The same thing happens in sand and rock TR modes.
Another club member with the TDV6 with a similar build date said his did the same thing.
Is this a known problem / fix.
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 5th Feb 2006 10:06 pm |
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Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26779
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Mine did this on our Wales Weekend. The answer was to take it out of command shift and let the gearbox manage itself.
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| 5th Feb 2006 10:10 pm |
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Keith Walshe
Member Since: 28 Feb 2005
Location: Sydney
Posts: 53
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That rather seems to remove a lot of the point of having command shift and palces a lot more wear on the brakes (more HDC use).
In any case it seems a most strange thing to happen.
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| 6th Feb 2006 4:10 am |
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discodownunder
Member Since: 30 Dec 2005
Location: Hillarys, Perth
Posts: 51
  
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Mine does the same but assume it is the HDC taking control 2005 Disco 3 HSE in Zambezi + Ebony, Sat Nav, Active Locking Rear Diff and Cool Box
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| 6th Feb 2006 4:28 am |
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PCH
Member Since: 12 Jan 2005
Location: Anywhere but work
Posts: 812
 
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Guys,
Mine does this also and has done it on almost every trip since new (Feb 05 build). It is most apparent in 2nd low only.
I like the idea of seeing what gear I'm in on descents and always use Command Shift.
I cannot see how HDC can take control if you don't push the button. It feels way too violent for HDC. It really feels like compression lock up.
Chris 2011 Discovery 4 (MY12) SDV6 HSE with General Grabber AT's, Traxide Aux Battery system, custom rear drawers and Autosafe half height cargo barrier
Gone - 2005 Discovery 3 TDV6 HSE
ARB Bull Bar, Warn 9.5XP Winch, IPF D/Lights, Cooper STT's, LR Raised Air Intake, Traxide aux battery system, custom drawers and half height Autosafe cargo barrier, Mitchell Bros 4x4 tow hitch
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| 6th Feb 2006 6:36 am |
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Keith Walshe
Member Since: 28 Feb 2005
Location: Sydney
Posts: 53
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I had the dealer look for fault codes this morning - found nothing so they are sending in one of those electronic fault reports to see what is going on.
It would be a very good idea if everybody else who has experienced this gets their dealer to do the same.
Keith Walshe
Tdv6
Td5 (on the drive and now the shoping trolley)
Td5
Tdi300
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| 6th Feb 2006 11:19 pm |
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Pelyma
Member Since: 06 Jan 2005
Location: Patching, Sussex
Posts: 15496
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Have you tried altering the speed of HDC, it can be violent when it kicks in. If you play about with the speed HDC comes in this may well give you a clue if this is it or not. DS3 TDV6 HSE - Silver with Alpaca (old one) Gone
DS3 TDV6 HSE- Silver with Alpaca (new one) Gone
D4 HSE Lux - Montalcino Red Gone
Porsche Cayenne V8 Diesel S
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| 7th Feb 2006 7:55 am |
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Keith Walshe
Member Since: 28 Feb 2005
Location: Sydney
Posts: 53
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This occurs with HDC switched off. I have observed this in "normal", mud and ruts and rock crawl TR modes.
Keith
(lost my signature somehow)
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| 7th Feb 2006 9:43 pm |
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