Disco LR3 Suspension lowered, HDC off, Special programs off

Hi all

Really hope someone can give me a bit more advice on my current Disco problems!
I have a 2006 Disco 3, TDV6 HSE
I have read through many of these blogs and threads and found certain points that I check and replaced where needed, but my landy is still giving me the famous Suspension Lowered, its down on access height, HDC off, Special programs off.
Heres what I have done to date:
Replaced the battery and alternator
Replaced all suspension related fuses and relays
Replaced all back bulbs with Land Rover bulbs
Check wiring harnesses in the left wheel arch, the wires going from the front CJB to the rear
Check all earth connections, every single one I could find
Checked all wheel speed sensors
Checked the steering angle sensor.
Diagnostics at the dealership has given no real result of what the issue can be

But my car is still giving me the same error. I don't know what to do anymore.

Something I have noticed is that the + and - battery terminals are loose. I fastened the terminal to the max, but the terminal still swivels around the battery pole. I also noticed that the terminals are hot after driving the car, could a loose swivel connection like that cause a voltage drop that effects the suspension?
Is there something else I need to check?

Your help will be much appreciated!!!

Thanks discostew
I will check for broken wires along the sensors end modules for the ABS. I have a diagram of the ABS and wires leading to components.
I will strip the car this weekend and check if I find wires broken off or a faulty ground somewhere.

I have spend in total nearly 30hours this last month trying to pin point the problem.

The issue I am having is that the diagnostics the dealer did does not pick up any faulty sensors or ecu modules. Its becoming a nightmare!!
But your advice regarding the abs system and the car trying to tell me something is not 100% along the safety side does shed some new light.
I will assess if I find any faults over the weekend and revert back if I do.

Thanks!!

I agree, some guys would rather avoid getting stuck in it to try and resolve the issue.
Like I said, I have spend many hours trying to find the fault, but to be honest I have mostly focused on the suspension related components rather that the ABS, especially wiring.

I will take the car for a full diagnostic again next week. This weekend I will check all my ABS related wires, sensors and ecu.

Thanks again for the advice! I am hoping to get to the bottom of this issue and when I do I will most definitely share my findings!

Thanks jymmiejamz
I did buy a new one, but like you experienced, it could be bad out of the box.
I will test the one fitted now....

So I spend another few hours this weekend on the car.
First, when I started the car Saturday morning, it lifted and there was no errors, suspension 100%. I drove to the dealers, they did a diagnostic and it only gave a Network related error. cant remember the code thou. But they did clear the error.

I found a burnt off earth wire in the back bumper. It comes out of the right hand side tail light. I stripped the bumper off, but couldn't find where it connects to at all.
This morning the car was still up, no faults or error lights. But when I drove, I went over two speed bumps, every time I went over, the amber brake light comes on and then off again. I stopped to put diesel in and when I started the car it went down again and all lights are back on.

Could this be some short on the ABS braking system?

Thanks for everyone's advice!! I found a broken wire. The same as what WHYdiscoIIErik had.
All errors are gone now!!

But another issue came up. I have no errors on the car, it is in access height mode, the compressor runs but not raising the car at all.
I felt and the compressor get extremely hot, it blew the 60amp yellow fuse in the engine bay.
I replaced this fuse, but when starting the car, the compressor comes on but gets extremely hot after a few seconds.

Any ideas what this could be?

Thanks Jymmiejamz
I will check for leaks and if all is good, get a service kit for the compressor.

I also read that it could be the block valve? I will check this as well.
Something I noticed is that the wheel height sensors on the 4x4 info screen flashes red. It is on all the wheels, and when you start driving it goes to different wheels, not consistant on 1 wheel or on all 4.

Hi All

An update on my findings this weekend!
I noticed that my park sensors isn't always working. After checking wires again from the CJB to the ABS module, suspension ecu, transmission ecu, I found no faults.
However, when I unplugged the park sensor module, the car cleared all errors! lifted, and no issues!
My 60 amp suspension fuse did blow twice,, but after replacing, it all seems fine.
I have also cleaned the dryer filter on the compresses.

Holding thumbs all is sorted now!