Fossicker
SupporterHi All
Just wanted to check if any one has had similar issue.
I've done a search and can find plenty on cruise control just not working, and causes including break light switch, clock spring, etc however my scenario is a bit different.
On the flat I can set and it will work, but on any sort of incline speed will fall, and it will not drop a gear or accelerate to keep speed. Where I can find cases of this its on older vehicles where the throttle was controlled by vacuum, but on these cars its all electronic. I don't use cruise that often but know it was working better than this before including at least attempting to keep speed on hills (success subject to steepness and load).
I have changed the clock spring anyway as there was some unusual behaviour with buttons on wheel when i pressed quickly, horn was intermittently not working (quit a while back) and I could hear a very slight dry whine when turning steering wheel at times.
Has any one had similar or any ideas on where I should start ?
2010 Discovery 4 3.0L TDV6 ~180K
Swaggie
Others have had what seems to be the same issue, resolved by recalibrating a sensor that's located under the centre console. I can't recall its name but it could be a longitudinal accelerometer that detects when the vehicle is travelling uphill, used by cruise control.
MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
VK2HFG and APRS W1 digi, RTK base station using LoRa
TopicToaster
SubscriberYes! There is a thread on this. OP have a search and you’ll find itOriginally Posted by Graeme
2010 TDV6 3.0L Discovery 4 HSE
2007 Audi RS4 (B7)
Fossicker
SupporterThanks Guys
Found it D4 cruise control runs away
And yes, took 2 mins and sorted the issue. Now holding speed to within 1-2 KMs.
Now on to next job.
2010 Discovery 4 3.0L TDV6 ~180K
Master
SubscriberDoes anyone have the problem, when using cruise control, that on a downhill the car will run on, not accellorating just coasting and gain speed with no retardation? I frequently travel a longish decline of about a kilo or thereabouts cruise set at 100 but by the foot of the hill , i wil be at 125 and still in 8th gear. Should it drop back a couple of gears to slow the car? I have had on occasions accelaraion going up hill, so that I have to disengage CC
Cheers
LuckyLes
Swaggie
Early 3.0 D4s would run away like this because the throttle wasn't closed (instant fuel consumption showed fuel being consumed) then LR released at least 2 updates, the 1st reduced the fuel consumption then eventually shut-off fuel completely on significant over-run which made a big difference to the extent of the over-run.
MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
VK2HFG and APRS W1 digi, RTK base station using LoRa
Master
SubscriberAre the updates available via Gap IID or do I need to take it to a dealer?
LordRover
SubscriberLikely to be available via their fast lane service and would be cheaper than LR I would expect.
MY08 TDV6 SE D3- permagrin ooh yeah
2004 Jayco Freedom tin tent
1998 Triumph Daytona T595
1974 VW Kombi bus
1958 Holden FC special sedan
Fossicker
SupporterThose updates are on the Engine ECU ?
Mine is 3010 and I do get the over run.
2010 Discovery 4 3.0L TDV6 ~180K
Swaggie
Yes, the PCM. However I would expect that those early updates would have been applied at a service many years ago.
Display the current fuel consumption whilst over-running. If it's zero then those updates have been done but not done if anything above zero, even 0.1 L/100.
MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
VK2HFG and APRS W1 digi, RTK base station using LoRa
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