| Home · FAQ · New Posts · My Posts · PMs · Search · Members · Members Map · Groups · Profile · Donate ·
Log In
|
- You are currently viewing DISCO3.CO.UK as a guest - Register to take part or Log In
IanMellor
Member Since: 22 Aug 2013
Location: Dublin
Posts: 145
  
|
| HDR fault system not available |
|
Hi all. I have a HDR fault with a green off road symbol and a few others in orange the suspension has bottomed out too. I get the "HDR fault system not available" message. I left her in the airport for about 5 days which is unusual as I normally drive it every day but it got home OK from the airport yesterday then this happened this morning. When I try clearing the faults (IID tool) it does not have any HDR faults so I assume there is a communications fault. Does anyone have any ideas what could be wrong. Thanks
|
 24th Jan 2018 12:37 pm |
|
|
Sea Raider
Member Since: 01 Nov 2016
Location: None
Posts: 4450
|
If its happened after leaving the car for 5 days, I would give the battery a boost to see if that sorts it out.
When I leave mine for a few days I always press the remote twice to shut off the internal alarm functions, to save a little of the battery and not been let down yet.
|
| 24th Jan 2018 12:55 pm |
|
|
IanMellor
Member Since: 22 Aug 2013
Location: Dublin
Posts: 145
|
I tried that but it didn't work:( I even bought a new battery and charged it to 13V ish).
I noticed that the HDC seems to be working (has power) as it raises the car then drops it.
This also happens if I clear all faults even through the HDC ECU is not there, maybe it does a power cycle.
Could it be a wiring issue?
|
| 24th Jan 2018 5:06 pm |
|
|
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10475
 
|
HDC is Hill Decent Control.
It's the Yellow button on the console
A green icon appears on the dash of a LR going downhill.
At the top of the hill (on a tricky loose surface) you press the yellow button, take your foot off all the pedals and the car does all the braking and acceleration for you.
Apparently you can see the cruise buttons to speed it up too.
Not to be confused the the green Icon showing Low Ratio 
So this has nothing to do with the suspension height going up and down
|
| 24th Jan 2018 7:09 pm |
|
|
IanMellor
Member Since: 22 Aug 2013
Location: Dublin
Posts: 145
|
Sorry I should have been more specific (HDC was the first fault coming up).
Here is what was happening:
- HDC Fault SYSTEM not Available
- Suspension lowering
- Special Programs not available
- Handbrake switches on as soon as the car is in N or P
- Car is stuck in low gear (and that is the worst of it all)
(I got this from another post: https://www.disco3.co.uk/forum/hdc-fault-s...vailable).
Turned out to be the battery voltage.
I got a new battery but that did not help (initially).
Sea rider was right! But what it needed was a charge for a few hours and then all the issues went away.
Maybe I wasted some money on a new battery but it was 3 years old anyway.
Does anyone know the voltage required to prevent this issue?
Thanks
|
| 25th Jan 2018 9:26 am |
|
|
Sea Raider
Member Since: 01 Nov 2016
Location: None
Posts: 4450
|
Another thing I found when looking for battery drain was that the Cubby box fridge does not switch itself off when the ignition is off, I had my battery checked a few times by different places before finding that it was down to the fridge remaining on when the motor was left.
You don't have a fridge, do you?
I think it eventually powers down when it detects low voltage but usually by this time its too late.
Its what I found anyway.
|
| 25th Jan 2018 9:33 am |
|
|
IanMellor
Member Since: 22 Aug 2013
Location: Dublin
Posts: 145
|
Thanks Sea Rider.
The strange thing was the car was fine when I picked it up from the airport.
It was the following day that it failed.....strange car but I love it!
|
| 25th Jan 2018 10:38 am |
|
|
Kazik13
Member Since: 13 Sep 2017
Location: Wroclaw
Posts: 19
|
Did you check battery charging?
Is it >14V?
|
| 25th Jan 2018 10:55 am |
|
|
IanMellor
Member Since: 22 Aug 2013
Location: Dublin
Posts: 145
|
Yeh coming up as 14.0-14.1 on IIS tool when driving.
The strange thing was it was 15V ish when it had the probelm / before I charged it.
Possibly the system trying to give it a boost?
|
| 25th Jan 2018 10:59 am |
|
|
Kazik13
Member Since: 13 Sep 2017
Location: Wroclaw
Posts: 19
|
That is fine.
15V charging is normal for first start and dropping to 14-14.5 when driving.
Do you remember fault codes what you had there?
|
| 25th Jan 2018 11:05 am |
|
|
IanMellor
Member Since: 22 Aug 2013
Location: Dublin
Posts: 145
|
No Sorry but that was the thing there were no fault codes as the ECUs were not there (I think).
For example there was no suspension fault (which I've seen before) even though the light was on?
I could have something wrong there.
|
| 25th Jan 2018 11:36 am |
|
|
TigerRecovery
Member Since: 31 May 2017
Location: Long Stratton, Norwich, Norfolk
Posts: 901
  
|
If the ECUs reset or drop out because of low voltage, they may have detected a fault code, but because they haven't had the ability to shut down correctly (resetting) they wont have stored the codes. 1972 Range Rover Classic 2 door V8
2013 Land Rover Discovery 4 HSE - SCRAPPED
2016 Land Rover Discovery 4 Landmark
2022 Volvo XC40 T5 PHEV 282HP FWD 3 cylinder!
|
| 25th Jan 2018 11:41 am |
|
|
|
Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
|
|
DISCO3.CO.UK Copyright © 2004-2024 Futuranet Ltd & Martin Lewis
|
|
DISCO3.CO.UK is independent and not affiliated to Land Rover.
