Transmission fault U0416

[Ean Austral]

Gday All,

Just started to get this fault come up, 2 times today , car goes into "special programs off" then lowers but doesn't go into limp mode. Code says " invalid data from vehicle dynamics."

New alternator installed 2 months ago and voltage seems fine. Haven't put a multi meter across it.

I did a hard reset but it faulted after doing so.

Any ideas.

Cheers Ean

[sheerluck]

If the supply of volts is definitely good, then I'd take a look at the ECUs behind the battery Ean. Check the pins and connectors, look for any corrosion.

[Ean Austral]

Ok so what is the correct or acceptable voltage. Would have thought anything above 13 running would be ok.

Cheers Ean

[sheerluck]

This is what the manual says the volts should be:
https://www.aulro.com/afvb/

[justinc]

Ean this is quite possibly a height sensor issue. Visually check all the sensor arms etc for damage and wiring/ plugs too. If the compressor is on the way out you will get different codes usually and warnings like 'vehicle raising slowly' at message centre.

Jc

[Ean Austral]

This is what the manual says the volts should be:
https://www.aulro.com/afvb/

Ok so I assume the chart relates to alternator at idle revs at those temps.

Thinking about it we were recently away camping where our 2nd battery was drained down enough for the fridge to cut out on low voltage but the tracked set up kept the start battery ok to start the car.

I put the battery charger on the batteries last night and both are at 13.4 volts this morning so will start from there and see where things progress.

Cheers Ean

[justinc]

"Thermal runaway condition."

😅😅😑😑

Jc

[Ean Austral]

This is what the manual says the volts should be:
http://www.aulro.com/afvb/attachment.php?attachmentid=111973&stc=1&d=1469866706

So batteries at 13.3 before starting the car and 13.7 - 13.9 just after start up at idle. @ 26 degrees

Took the car for a 20 min drive and no faults so far.See how things go from here.

Cheers Ean

[Graeme]

Was that fault code the only one for the whole vehicle?

[Ean Austral]

Was that fault code the only one for the whole vehicle?
Yes , no other faults were logged , but am sure this was logged in 2 seperate places - TC and Transmission as I recall.

Cheers Ean

[sheerluck]

"Thermal runaway condition."

😅😅😑😑

Jc

No laughing matter JC. See what happened when this poor bugger parked his D3 in his garage when it was a bit a bit too warm:
https://www.aulro.com/afvb/

[Ean Austral]

No laughing matter JC. See what happened when this poor bugger parked his D3 in his garage when it was a bit a bit too warm:
https://www.aulro.com/afvb/


:Rolling::Rolling::Rolling::Rolling::Rolling:

Cheers Ean

[Narangga]

No laughing matter JC. See what happened when this poor bugger parked his D3 in his garage when it was a bit a bit too warm:
http://www.aulro.com/afvb/attachment.php?attachmentid=111989&stc=1&d=1469931943

Before Pedro asks - I assume that it was a diesel? :angel:

[Graeme]

logged in 2 seperate places - TC and Transmission as I recall.Suggests a fault at the TC ecu as the TC ecu is a gateway for the high speed can-bus. Look for corrosion on the TC ecu's pins.

The suspension ecu's can-bus passes through the TC ecu whereas the gearbox and engine are on the other side.

[Ean Austral]

So is something like contact cleaner good to use on these ECU connections.


Cheers Ean

[Ean Austral]

I had this fault reappear today, 7 days after I left the car on battery charge over night.


I removed the battery and tried to check the ECU pins, could get at the front ECU no problems , all nice and clean , How the hell do you undo the back ECU connectors on the top.


Cheers Ean

[sheerluck]

There's a little clip you need to push on, then the lever will swivel over and push the connector out of it's socket.

They need to be done in order, right to left I think..

[Ean Austral]

There's a little clip you need to push on, then the lever will swivel over and push the connector out of it's socket.

They need to be done in order, right to left I think..

Great just what I needed, a challenge.

Cheers Ean

[sheerluck]

When you know the trick Ean, it's very simple!

[Ean Austral]

When you know the trick Ean, it's very simple!


Judging by the front ECU I don't think it will be the problem but we wont leave the easy things to chance.


Cheers Ean

[LandyAndy]

Ean
Similarities here.
http://www.aulro.com/afvb/aulro-s-o-s-breakdown-only/238524-d3-transmission-fault.html
Andrew

[Ean Austral]

Yes very much so Andrew but I dont believe my alternator if faulty. I will be load testing the battery next.

I can only wonder if the batteries being low whilst we were camping has something to do with it.

I will keep trying .

Cheers Ean

[Tinman]

Hi Ean, I recently had a lot of faults coming up which lowered my vehicle also. My battery was showing 13.8-13.9 volts at idle thought a tad low installed a new alternator now at idle the battery shows 14.2-14.3 The faults went away and vehicle hasnt had a problem since.
Cheers

[Ean Austral]

Gday Tinman,


My battery voltages are the same at idle from the old Alternator to the new Alternator .


As I say we did manage to run the aux battery low whilst we were away , but the start battery was kept at 12v by the traxide system and the voltages came up very quickly once the car was started.


I will see what the load test say's but only purchased the battery in Feb , but that said I have seen batteries fail that were newer than mine.


Cheers Ean

[PerthDisco]

Yes very much so Andrew but I dont believe my alternator if faulty. I will be load testing the battery next.



I can only wonder if the batteries being low whilst we were camping has something to do with it.



I will keep trying .



Cheers Ean



My car lit up last night on the way home with HDC Failure / Transmission Fault / Suspension Lowering. A semi sleepless night ensued.

The Suspension Lowering part is a real concern if you were at the Back of Bourke!!

Thanks to Ean and many posts on this subject leading to a common cause(s) I have had the battery on charge all day and all seems good. Fingers crossed.

I left the car undriven from Boxing Day till the 10th and most likely Shopping Trolley behaviour after that is most likely culprit.

Battery was new September 2015.

All brake bulbs ok and brake switch was preventatively changed about 40,000km ago. I have the old one in the glove box.

[PerthDisco]

It's baaaaaaack!

After a night on charge it lit up again today and lowered suspension.

Battery was replaced Sep 2015 so hoping that is not the issue.

Will probably replace the rear bulbs and brake switch again for good (cheap) measure.

My real sense is that the alternator is on the fritz. Would be about time.

My question is if the cars are so voltage dependant then when running (with a healthy alternator) the system has 14V going into it so how does a flat battery trigger the problems once the car has started.

This would seem to lend weight to my alternator being the problem?

[Fatso]

Gday Tinman,


My battery voltages are the same at idle from the old Alternator to the new Alternator .


As I say we did manage to run the aux battery low whilst we were away , but the start battery was kept at 12v by the traxide system and the voltages came up very quickly once the car was started.


I will see what the load test say's but only purchased the battery in Feb , but that said I have seen batteries fail that were newer than mine.


Cheers Ean

What was the outcome Ean ? Cheers

[LandyAndy]

Have a good look at the battery terminals.
Land Rover excel in making battery terminals that cant be tightened properly.
Andrew

[PerthDisco]

Have a good look at the battery terminals.

Land Rover excel in making battery terminals that cant be tightened properly.

Andrew



Yep made super careful they were tapped down and on tight.

Battery tested ok.

Had the fault 3 times today. Cleared on restart each time. Each time fault appears seems to relate to a dab on the brake.

Bought and changed a new brake switch ($30 at Ford) and two new brake globes. Brake switch was only 3 years old and spotless inside. One of the globes looked pretty sick.

Took it for a test run and no faults but time will tell.........

[LandyAndy]

One of the W4 fellows posted the other day his cruise stopped working in his D3.There was a faulty brake light.Replaced it with a quality globe,brake light worked again,still no cruise.Bought a genuine globe and normality resumed.
I hope my D4 doesn't get that picky!!!!!
Andrew

[Narangga]

What was the outcome Ean ? Cheers

He is slumminig it on a cruise at the moment :o, but as far as I am aware he replaced a faulty battery and has not had the problem since.

[Fatso]

He is slumminig it on a cruise at the moment :o, but as far as I am aware he replaced a faulty battery and has not had the problem since.

Great place to slum it !!! , Thanks for the update always good to get a result , Al

[PerthDisco]

He is slumminig it on a cruise at the moment :o, but as far as I am aware he replaced a faulty battery and has not had the problem since.



Given the frequency of gastro outbreaks on cruises I sometimes wonder if slumming is not an apt description.

[Pedro_The_Swift]

Given he spent his working life on a boat its a strange choice of holiday
:p

[LandyAndy]

I wonder if he eats their prawns???
Andrew

[letherm]

Given he spent his working life on a boat its a strange choice of holiday
:p

Haven't you heard of a bus man's holiday:)?

[PerthDisco]

Hope he is using the hand wash.

Back on topic a full day has passed with no reappearance of the fault. Wish I had done globes and brake switch separately now. If it's a $30 DIY fix I will be happy [emoji4]

[Narangga]

Given he spent his working life on a boat its a strange choice of holiday
:p

Especially with the in-laws :eek:

[PerthDisco]

Multiple days now and all ok. Thinking it was most likely the globes even though both sides still working. Unlikely brake switch only lasted 40k kms. Confirms both are vital spares for the travel kit.

[PeterOZ]

Multiple days now and all ok. Thinking it was most likely the globes even though both sides still working. Unlikely brake switch only lasted 40k kms. Confirms both are vital spares for the travel kit.



what brand are genuine globes? Mine has done the HDC fault thing now a few times while on the beach. I did have a blown brake light, replaced it with a SCA one as that was all I could get. It blew within a few days and I put another in as it was a two pack but will replace both if I can find out which is correct brand.


Getting new brake switch as well on Friday. Original is from when the car was new. aug 2007 :o 220k

[Ean Austral]

What was the outcome Ean ? Cheers

I put it down to a dead cell in the start battery. It showed good voltage on a multi meter but wasn't going to leave any stone unturned so put the load tester on it and it wasn't good. Got a new battery under warranty and all was good after that.

2 weeks later I removed the brake light switch and seen some carbon like stuff on the points so I got a brake light switch from the local ford dealer for under $20 so changed it as well.

I haven't had it come back since.

Cheers Ean