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D4 Cruise control glitch
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Dougal
 


Member Since: 31 Jan 2006
Location: Edinburgh
Posts: 45

Scotland 2010 Discovery 4 3.0 TDV6 GS Auto Stornoway GreyDiscovery 4
D4 Cruise control glitch

Anyone else experienced this?

Driving up from the South of France on Sunday. D4 (MY 2011 with 15k miles) had been cruising nicely at around 80mph (legal on the Autoroute...) with cruise control on for a few hours. Traffic ahead slowed so I clicked the cruise "-" control and the "Cruise Speed" indicated on the dash increased by 1 increment (1 mph), followed by a slight speed increase Shocked

Tried the "-" again several times and each time the set speed incremented up. Clicked the "+" as a trial and it also incremented up. Cancelled cruise and reset it, but again both the "+" and the "-" caused the "Cruise Speed" and actual speed to increase.

Cancelled cruise and left it for a few minutes, retried and all was back to normal.

Never had it before and its not occurred again...
  
Post #8140595th Jul 2011 12:23 pm
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MrH
 


Member Since: 08 Aug 2007
Location: lost in the forest
Posts: 7754

United Kingdom 

I've had similar, the vehicle actually sped up though if I held down the minus button longer to allow the momentum to subside it then drops speed- it appears the vehicle carries too much momentum to react immediately (not surprising considering the weight) .
 LRs are a fond memory, apart from the maintenance.  
Post #8140935th Jul 2011 1:43 pm
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GraemeS
 


Member Since: 17 Mar 2008
Location: NSW
Posts: 706

Australia 2010 Discovery 4 3.0 TDV6 SE Auto Nara BronzeDiscovery 4

The CC decrease button on my MY10 3.0 caused speed increase if on overrun until a s/w update in April this year. Now it behaves.
 Home of LLAMS, for LRs and Jeep GCs  
Post #8142235th Jul 2011 6:50 pm
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mwestcrew
 


Member Since: 24 May 2005
Location: Warwickshire
Posts: 334

United Kingdom 2011 Discovery 4 3.0 TDV6 Landmark LE Auto Fuji WhiteDiscovery 4

This usually happens when the car is going faster than the setspeed (because of a long downhill section for example).

Been a couple of topics previously on this subject.
 2011 D4 Landmark, Mini Cooper SD Clubman, Range Rover Vogue SE  
Post #8156219th Jul 2011 7:57 pm
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Greywolf
 


Member Since: 08 Jun 2011
Location: North west Lancashire
Posts: 8

United Kingdom 2011 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

Mine did this a few times when I first got it, recently I haven't noticed it so I think it may have 'learned'.
 Eagles may soar but weasels don't get sucked into jet engines.  
Post #81627912th Jul 2011 6:44 am
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Dougal
 


Member Since: 31 Jan 2006
Location: Edinburgh
Posts: 45

Scotland 2010 Discovery 4 3.0 TDV6 GS Auto Stornoway GreyDiscovery 4

Unfortunately it wasn't an overrun issue - I've experienced this a few times as I'm sure most have.

The Cruise Setspeed on the dash incremented up as the "-" button was pressed. Normally this would decrement. The actual vehicle speed "should" follow this but as has been said there may be a lag.

Never mind, never happened again - just wondered if anyone else had seen it. Its a Sept 2010 MY 2011 so a software update may be all that is needed.
  
Post #81748115th Jul 2011 12:50 pm
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