I have a manual TD4.

On my car, HDC works descending in 1st, but +/- buttons does not affect the speed.
HDC does not seem to work in reverse descending backward neither the +/- buttons.
GRC does not work either ascending or descending in first or reverse.

Tested this with TR on NORMAL mode.

Has anyone got the same ?

Does it take a softwrae upgrade for fixing ?

Hi Countyside Not suggesting you have not followed the manual, but the gradients have to be pretty steep.....so much so when at Tong it was suggested I was hard on the brakes as my rear wheels were alledgedly locked all the way down!!!!???? Yet I could feel the fronts 'grurnching' on the way down, and my feet were no where near the brakes

Hi Carlfraz.

Did try on different steep descents.

HDC definitely worked in 1st gear (could ear brakes working on multiple wheels without touching the pedal) but no action of +/- buttons (one slope was so steep that I wanted to slow the car down using HDC and - button but the speed was the same during second try as well).
On the steepest slope, tried HDC in reverse & GRC that did not work.

Wondering if it takes some softare upgrade to get these working ?

countryside wrote:

Hi Carlfraz.

Did try on different steep descents.

HDC definitely worked in 1st gear (could ear brakes working on multiple wheels without touching the pedal) but no action of +/- buttons (one slope was so steep that I wanted to slow the car down using HDC and - button but the speed was the same during second try as well).
On the steepest slope, tried HDC in reverse & GRC that did not work.

Wondering if it takes some softare upgrade to get these working ?

the +/- does make very small increases/decreases i think 0.5mph per press, try multiple taps of the button  Former Mod/Member, with the most post & Chicken George Arch nemesis

Countryside, don't forget that the HDC limits the speed to 7 Km/h. - not lower. Actually in many situations, especially on bumpy tracks, this speed is far too high for a FL2 with a quite low ground clearance. As it has no low gears, it wasn't possible to limit the maximum speed to 3 Km/h which I believe is the limit for a Rang Rover.
So you can push that "-" button untill you weight an ounce (typical Dutch proverb - according to my dictionary in English it should be "wait till the cows come home" which actually matches you even better countryside ) but your car will descend just too fast and you'll have to operate the brakes.

Thx guys.

Yes, I forgot that I read somewhere that speed range is 7 to 9 Km/h.
Agree that on real steep slope 7 is too high.
Too bad that there is no low gears for going down to 3 !!!

Is HDC working in reverse & GRC working at all on yours ?

I wouldn't know if HDC works in reverse: I prefer to descent a bit slower than at 7 Km/h (in reverse).

Last edited by Paul on 28th Nov 2007 4:34 pm. Edited 1 time in total

Paul wrote:

I wouldn't know if HDC works in reverse: I prefer to descent a bit slower than at 7 Km/h (in reverse).

About GRC (Dynamic Stability Control):

New-generation Dynamic Stability Control (DSC) reacts quickly if the car isn´t responding correctly to your steering. This system intervenes in less than 10 milliseconds to adjust the vehicle´s course and cornering. It particularly helps the driver to maintain control in skid conditions

I don't think it is the kind of electronic help that comes in during the conditions you described.

Using the LR2 (auto) at the experience last week I agree that the 5mph limit for the HDC can be a bit fast but worked consistantly well on all terrains. I was mainly in Mud/ruts or snow/ice modes though due to the very wet (read fun ) conditions.

Re HDC in reverse, When selected it does say in the display that it's not supported in that gear. But I put my faith in the instructor and tried it and it worked very well. And it wasn't my car so what did I care?

A good pointer from him was to alway have HDC turned on if climbing slopes so *if* you do lose grip and roll back you don't have to jump on the brakes and risk locking them causing bigger probs. Theory is good IMO.

Joe MY11 Fuji white Td4 150 GS straight up no mixer.

Paul wrote:

I wouldn't know if HDC works in reverse: I prefer to descent a bit slower than at 7 Km/h (in reverse).

About GRC (Dynamic Stability Control):

New-generation Dynamic Stability Control (DSC) reacts quickly if the car isn´t responding correctly to your steering. This system intervenes in less than 10 milliseconds to adjust the vehicle´s course and cornering. It particularly helps the driver to maintain control in skid conditions

I don't think it is the kind of electronic help that comes in during the conditions you described.

npinks wrote:

Paul wrote:

I wouldn't know if HDC works in reverse: I prefer to descent a bit slower than at 7 Km/h (in reverse).

About GRC (Dynamic Stability Control):

New-generation Dynamic Stability Control (DSC) reacts quickly if the car isn´t responding correctly to your steering. This system intervenes in less than 10 milliseconds to adjust the vehicle´s course and cornering. It particularly helps the driver to maintain control in skid conditions

I don't think it is the kind of electronic help that comes in during the conditions you described.

About GRC (Gradient Releace Control)

Holds the brakes for a second or two to allow you to set the revs.

Worked when i was on a LRE but seemed to be automatic, TR set to MUD

joe1978 wrote:

Using the LR2 (auto) at the experience last week I agree that the 5mph limit for the HDC can be a bit fast but worked consistantly well on all terrains. I was mainly in Mud/ruts or snow/ice modes though due to the very wet (read fun ) conditions.

Re HDC in reverse, When selected it does say in the display that it's not supported in that gear. But I put my faith in the instructor and tried it and it worked very well. And it wasn't my car so what did I care?

A good pointer from him was to alway have HDC turned on if climbing slopes so *if* you do lose grip and roll back you don't have to jump on the brakes and risk locking them causing bigger probs. Theory is good IMO.

Joe

Apparently I was a bit confused when I replied upon the GRC. Sorry for the inconvenience (I removed my post)

Which that LR engineers can find a way to allow for lower speed than 7.
Should'nt that be possible using ABS system even without extended engine brake provided by low gear ?[/quote]

Some time ago I started this topic:

http://www.freel2.com/forum/topic847.html?highlight=

Maybe you'll find some interesting ideas in it.

Paul wrote:

Apparently I was a bit confused when I replied upon the GRC. Sorry for the inconvenience (I removed my post)

I prescribe a dark room and 30 minutes rest, if you get up and still feel confused then lay down again  Former Mod/Member, with the most post & Chicken George Arch nemesis