2014 3 amigoes issue

[Turtle60]

So without warning the other day all of a sudden I get a ping telling me the I have an ABS failure, no HDC, no stability control or parkbrake. To make matters worse suspension then drops to access height. Research suggest 3 amigoes except I have four and most threads refer to disco2. Mine is the 2014 8 speed.

Time to give my GAP ID tool a run. Comes up with a heap of faults but number one suggests front left ABS wheel speed sensor. Makes perfect sense. I cleared all faults and by the time I leave the driveway all faults are back. Bugger. So repeat this a few times for the same result. So I immediately replaced said sensor cable thinking this should do it but not to be. Cleared all faults and within moderately more short term all back again. Now it is really sad.

The whole car was shod with new discs and rotors over 5000 klms ago and no issues to date and a new battery installed three weeks ago. All seems good.
This front left did whack a pot hole 8 months ago resulting in a buckled front left comp rim. But no other dramas. Replaced rim and good to go.

What is interesting to me that the speed sensor cable is very robust looking up to the plug under the guard and then the plug exits this with two very thin unprotected wires. Do these then run over to the abs on the drivers side. Thinking of a wire continuity check if so.
Finally after all this and twice now since this issue started I’ve had a pretty decent clunk from the front left while reversing. It was definitely a drive line clunk.

The car is booked in for diagnosis but curious if anyone has seen this in the later models. Can’t understand why it needs to involve the suspension in this either. Very annoying as the car could be nursed home way easier. Also i have read there is a long cable that bypasses the plug direct to the engine bay. But this could be just the disco 2.
The speed sensor ring looks fine, no play or noise in the bearing and vehicle has new control arms 5000 klms ago also.

I will post results as I find out but anyone got a clue. I bloody love this car and Have built it up to head outback and Simpson crossing next month and this has rocked my confidence.
Cheers
Steve

[Tombie]

Check your newly installed battery.

Pay particular attention the terminal tightness.

And check the battery itself - wouldn’t be the first early failure.

When you replaced it; you *did* reset the BMS right?

[Ean Austral]

What Tombie said. Also any earth terminal, especially Dual Battery System .

Cheers Ean

[Turtle60]

Check your newly installed battery.

Pay particular attention the terminal tightness.

And check the battery itself - wouldn’t be the first early failure.

When you replaced it; you *did* reset the BMS right?

I believe I did all this correctly. But will check again. Used gap tool for BMS reset but admit I wasn’t exactly clear how to do this. I’ll go through process again

thanks

[Turtle60]

What Tombie said. Also any earth terminal, especially Dual Battery System .

Cheers Ean
Ironically I did find a loose neg terminal on my dual battery a few days ago checking for any simple stuff. Wasn’t off but could move it. But righted the issue straight away.
Could have this caused an ongoing issue?
New battery is agm and seems fine.

[DiscoMick]

When I had a wheel ABS sensor fault on our Defender recently, it was because the sensor was installed in the wrong position. A quick adjustment while I waited fixed it.

[Tombie]

Ironically I did find a loose neg terminal on my dual battery a few days ago checking for any simple stuff. Wasn’t off but could move it. But righted the issue straight away.
Could have this caused an ongoing issue?
New battery is agm and seems fine.

When you say it seems fine...

Have you checked the terminals?
Do you have a multimeter?

[Turtle60]

When you say it seems fine...

Have you checked the terminals?
Do you have a multimeter?

Yes should been less vague. Terminals rock solid, clean, voltage at 12.7. Starts very lively. Dual battery also 12.7. All terminals clean and tight.

[justinc]

Check that front wheel bearing....

[Graeme]

Anything that causes bad vibrations at the sensor can interfere with the ABS signal. Also check the left CV joints.

Lowering to access / safe height is because the suspension ecu has reacted to an ABS-reported fault.

[Mickyg]

does the D3 need to be reset after battery change? I have a new battery and I get huge list of faults on random occassions but the car drives fine after restart

[Tombie]

does the D3 need to be reset after battery change? I have a new battery and I get huge list of faults on random occassions but the car drives fine after restart

Different set up. No BMS to reset.

Cascading errors can be a sign of alternator age, how long ago was your alternator changed, if at all? And how many kms on your D3?

[Mickyg]

Different set up. No BMS to reset.

Cascading errors can be a sign of alternator age, how long ago was your alternator changed, if at all? And how many kms on your D3?

Thanks Tombie, was told its had an alternator done already, thats not to say its not due for another. I just bought the vehicle it has 172k on it, the battery was done a few weeks ago, it hasn't gone flat so I assume the alternator is working but I'll put my meter on it and check
U0101
U0122(87)
U0403(94)
U0416(94)
U3FF0
C1A00
U0401
C0051
U0300
P181F P181D P181F
U3003
I'm thinking bad earth maybe?
Cheers

[Ean Austral]

Thanks Tombie, was told its had an alternator done already, thats not to say its not due for another. I just bought the vehicle it has 172k on it, the battery was done a few weeks ago, it hasn't gone flat so I assume the alternator is working but I'll put my meter on it and check
U0101
U0122(87)
U0403(94)
U0416(94)
U3FF0
C1A00
U0401
C0051
U0300
P181F P181D P181F
U3003
I'm thinking bad earth maybe?
Cheers

There are 2 earth studs just in front of the main battery box , passenger side , on the D3 , I assume the D4 is the same. I remember playing with these once and never tightened them and the cascade of faults was crazy, most of them were related to g/box and transfer from memory , but I remember the car dropped to the bump stops. They shouldn't get disturbed changing the battery , but worth a quick look.

Cheers Ean

[Mickyg]

Thanks Ean, I will check these...on a side note I live in Darwin if you have time to catch up?

[Ean Austral]

Thanks Ean, I will check these...on a side note I live in Darwin if you have time to catch up?

No worries, I live in Bayview , and work at the duckpond near the city so don't venture out much whilst the fishing fleet is in town but always happy to catch up with fellow Darwinites. Work will slow down next week so will be a bit more free after then. I will PM my number shortly

Cheers Ean

[Turtle60]

Update. Vehicle had the diagnostics on it and front left “new” aftermarket ABS sensor is dead. All other systems tested fine. New genuine sensor ordered and will be in Monday. Local indie says he would mostly would never use anything but genuine parts but especially so for sensors. Will post result on Monday.

[Turtle60]

New genuine wheel speed sensor finally arrived today and fitted. All seems to be behaving so far. It will get an 800klm trial tomorrow. Here’s hoping.

[Turtle60]

Well 700 klms today and all seems well in the world. Still surprised that a non genuine sensor could behave so badly. Anyway proof is in the pudding. Local indie believes You should change them all when one fails. Good news in this is that the gap ID tool was bang on the money in its fault recognition.
Thanks all who suggested various things to check
cheers

[Tombie]

Well 700 klms today and all seems well in the world. Still surprised that a non genuine sensor could behave so badly. Anyway proof is in the pudding. Local indie believes You should change them all when one fails. Good news in this is that the gap ID tool was bang on the money in its fault recognition.
Thanks all who suggested various things to check
cheers

Glad you sorted it. Avoid aftermarket for a lot of items. cooling Hoses and sensors being 2 of the items you always go genuine. [emoji41]

Just some info for you. The IID tool cant recognise the fault, all it does is interrogate the ECUs and display the result. Please keep that in mind going forward.

Also worthy of note - some faults will display symptoms rather than the fault itself. It can be an art to translate some times.

[Disco Simon]

Hi all,
I’ve been wading through past threads trying to build a knowledge base for some upcoming remote travel in my MY2015 SDV6.
On the subject of wheel speed sensors, I understand that if one fails, the car will drop to access height.
Could I then use my GAP tool to raise the car back to off-road height? In which case, I would be without ABS, DSC and HDC, but it wouldn’t be a showstopper.
Regards
Disco Simon

[BradC]

On the subject of wheel speed sensors, I understand that if one fails, the car will drop to access height.
Could I then use my GAP tool to raise the car back to off-road height?

Easier to switch off, switch on, raise to wanted height and remove suspension fuse.