Hi,

When I turn the ignition on the following message appears - "HDC Inactive" - anyone know what this is??

Thanks,

Dave 1993 YZF 750 SP

You have a problem with your Air Suspension .

I also understand that this is one message that can be thrown up if you have low battery voltage.

Last edited by delamo on 8th Sep 2010 11:42am. Edited 2 times in total

From the handbook.

"HDC INACTIVE A fault in the Hill Descent Control
system has occurred.
Do not attempt the planned
descent/ascent and consult your
retailer at the earliest opportunity."

You could try switching the HDC off and on again.

Ian

delamo wrote:

You have a problem with your Air Suspension .

I also understand that this is one message that can be thrown up if you have low battery voltage.

Ref - IanV8's reply...

Oops! - sorry dave, I could be wrong?


I thought the HDC and Air Suspension were connected in some way?

If the HDC Inactive message pops up, doesn't this automatically drop the suspension height?


Edit davemfox - have a look at this earlier fullfatrr.com thread about the same thing...

http://www.fullfatrr.com/forum/post7636.html

In theory, you have a problem with your suspension. In practice, you almost certainly have a problem with your battery, ie. it's on it's last legs. My 4.4V8 started doing this and six months later I had to replace the (original!) battery. Never had the problem since.

What appears to happen is that there isn't enough power in a low battery to self-test all the systems before the engine starts, hence the warning which immediately clears as soon as sufficient power is supplied.

Edit: Just noticed that's my thread highlighted above! 2021 3.0 P400 Vogue
2012 4.4 TDV8 Westminster - gone!
2007 3.6 TDV8 Vogue - gone!
2003 4.4 V8 HSE (LPG) - gone!
2018 F-Pace 25t Portfolio
1974 LR Series III Lightweight FFR
2014 BMW 640i Gran Coupe

IanV8 wrote:

From the handbook.



You could try switching the HDC off and on again.

Ian

this worked Must have been lack of use.

I'll bear the battery aspect in mind JW911

Dave 1993 YZF 750 SP

hi i get this some times, not that oftern but i think its one of them gremlings, did it go when you switched it off and then on, if so dont worry my mate gets it at least once a week and he never had a prob with his car. V8 facelift Range Rover Autobiography 22" wheels.
1976 Harley Davidson Iron Head Sportster

HDC Inactive would display when switch is activated to show it is not working - if it comes up when ignition starts, part of system checks, then disappears then I would say 'JW911' is correct, and low volatge is causing the phantom warning. Worth checking battery leads are tight!
Mine displayed this on starting for over a year until battery finaly died - once Varta battery is replaced with another Varta - fault has never came up since.
HDC has never failed and has remained functioning throughout.
Air suspension faults would come up on their own if there is a fault but would not always sink to lowest setting - thankfully.

Mine comes up regular, Recent OE spec Battery. The message disappears in seconds and no Arrows to show a persistant fault. HDC works fine to.

Its just personality of the car.

When I wake up first thing I probably have similar issues, especially if its for an early turn 5.30am  2010 Disco XS TDV6, 2009 Freelander 2 GS

Previous Landrover products -1990 110 TDI CSW, 2003 TD6 Vogue - RRC TD Vogue, RRC v8 Fleetline, Disco ES V8 LPG, 101 Ambulance "Morph", 1964 SIIa Auto Powered by Jag 4.2 Lump - "Percy".

Cheers for your help gents

It only came up once the engine was running and I was playing with the buttons


Now just got to sort out the non-working mirror fold issue...

Dave 1993 YZF 750 SP