I took the Jatco auto ECU from the same vehicle that I got the transmission from (a prefacelift V6 Freelander 1). My understanding is that the shift points are defined by the Jatco ECU and not the engine ECU. I am told that the R75 auto engine ECU is basically the same as the manual one but with different maps giving (for example) a stronger ant-stall / idle setting.

Yes the V6 is going to give higher shift points as the TD4 one isn't going to go over 4500rpm.

Goodness only knows what will happen with a V6 Jatco auto ECU mated to a 1.8K series, but with a 1.8 IRD and rear diff (so much lower final drive). It probably won't be optimal but hopefully it will be good enough.
 
pscan.eu said:
I took the Jatco auto ECU from the same vehicle that I got the transmission from (a prefacelift V6 Freelander 1). My understanding is that the shift points are defined by the Jatco ECU and not the engine ECU. I am told that the R75 auto engine ECU is basically the same as the manual one but with different maps giving (for example) a stronger ant-stall / idle setting.

Yes the V6 is going to give higher shift points as the TD4 one isn't going to go over 4500rpm.

Goodness only knows what will happen with a V6 Jatco auto ECU mated to a 1.8K series, but with a 1.8 IRD and rear diff (so much lower final drive). It probably won't be optimal but hopefully it will be good enough.
Click to expand...
 
I just bought a V6 box ECU to add to my collection , so yes it will be interesting to see how the shift points differ.
It will be also interesting to see if the r75 box ECU will have operational steptronic , as that will give a third box ECU option.
Unlike yourself I m using a r75 1.8t gearbox so my final drive is different I imagine.
The gearbox ECU sends messages during shifting etc to the engine ECU so I hope for us the Freelander firmwares in the auto ECUs talk the same as the r75 one (I am using a nnn000110 engine r75 ECU like you).
 
You have made me realise something, so thank you for posting.
That is, now I have a Rover 75 auto engine ECU working in the Freelander, if I can't make the V6 auto transmission work I do have another option which is to put a Rover 75 gearbox and transmission ECU in it and just go FWD.
It would need custom drive shafts but that's not rocket science.
So one way or another this is going to work, it's just a question of whether 4WD is retained or not.
Thanks.
 
andyfreelandy said:
This seller claims to have fitted a ULEZ compliant Diesel engine to this auto TD4.

Have asked what engine, looks like a TD4 !!

www.ebay.co.uk

Land Rover Freelander 4x4 MK1 TD4 New Engine 40k Miles Valued £5,000 towbar Auto | eBay

Find many great new & used options and get the best deals for Land Rover Freelander 4x4 MK1 TD4 New Engine 40k Miles Valued £5,000 towbar Auto at the best online prices at eBay! Free delivery for many products.
www.ebay.co.uk
Click to expand...
ULEZ compatible... lolz
 
andyfreelandy said:
This seller claims to have fitted a ULEZ compliant Diesel engine to this auto TD4.

Have asked what engine, looks like a TD4 !!

www.ebay.co.uk

Land Rover Freelander 4x4 MK1 TD4 New Engine 40k Miles Valued £5,000 towbar Auto | eBay

Find many great new & used options and get the best deals for Land Rover Freelander 4x4 MK1 TD4 New Engine 40k Miles Valued £5,000 towbar Auto at the best online prices at eBay! Free delivery for many products.
www.ebay.co.uk
Click to expand...
lol, NEW engine and NEW gearbox.

Engine's done 30k - oh so its not new... and probably done 200k.

As has the new gearbox probably.
 
Wanted to share some testing results .
I have an r75 nnn000110 ECU on my test rig along with a 1.8 Freelander clockset.
The r75 gearbox ECU shows gear position on the instruments no worries , but the tip tronic selection and sport mode of the Freelander will NOT activate :-(
I tried the petrol V6 Freelander gearbox ECU but it just errors F4 for some reason.

I have been using the Andrew revill software during testing and interestingly it doesn't highlight any difference between the two nnn000110 r75 ECU I have, one which is from a manual and one from an auto !
I still have to test the td4 auto ECU on the test rig.
 
Interestingly the TD4 automatic set up shows only 2 cables between the engine ECU and the Jatco ECU. Also the ABS has a connection to the Jatco ECU.
Maybe the engine ECUs are the same for auto and manual with just these extra 2 connections unused on a manual?

Does anyone know what data passes on these 2 lines from engine to autobox??

Wondered, for the 1.8K and Rover 75 auto option if the auto gearbox ECU could connect to the Freelander engine ECU directly??
 
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The Rover 75 Auto ECU has the same pin connections to the engine ECU as the Freelander TD4 Auto ! So looks like the 1.8K engine ECU may talk to the TD4 Auto ECU directly. If the auto and manual engine ecus are the same. They use the auto data lines to communicate with the ABS ECU as well so all the data may be there for the picking ?!?!
 
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I tried an experiment with the auto gearbox ECU connected to the rover 75 auto and to the Freelander 1.8 ECU.
I logged the data traffic over the bus and the gearbox ECU always sent it's data ( which the instruments showed).
The gearbox ECU uses 0x43F . This was the only extra can id transmitted.
Interestingly the auto ECU sends the gear position EVEN when it is in limp mode F4.
I am going to put all the arbid from this thread, the ev thread and what I have found on GitHub. I will post the link later.
 
andyfreelandy said:
So my idea works?
Not sure if you are saying that the 1.8 ecu talks to the auto correctly.
Click to expand...
No that's it , on the bench so far I haven't seen any "different" data in the messages from ANY engine Ecu in response to the gearbox ECU.
According to the jatco info I have there should be more messages seen FROM the gearbox ECU.
This far I have seen ;
Gear lever selector position.
Gearbox fault status.

Looking at the list I think the only additional message the engine ECU will send will be the torque reduction response , which I haven't seen yet.

I attach the message list from the jatco docs
 

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a minor bit of progress this morning.
I have been able to get the R75 ECU (NNN000110) to pull in the A/C clutch on a running engine by disconnecting the Freelander cluster and emulating a 75 cluster firing in the A/C switch signal.
The next step is to get Andrew to modify the NNN000110 firmware again to trigger the A/C off of the Freelander cluster rather than the R75 one.
This is the last electronics step before I move to mechanical mods.
 
Hill descent integration: working
EVAP temp sensor input: working
Fan relay outputs: relays connected but fans not yet wired up
A/C switch input: working (read from Freelander cluster)
Trinary switch input: working
A/C clutch output: working

r75ecuinfl1-20112023.png
 
Excellent work !!
Did you read the posts above? Is there any chance that a Freelander ECU already puts out the signals for the Auto ECU ? I know it's a wild shot but I had the thought when I read that the R75 auto and manual engine ECUs appear identical.
 
pscan.eu said:
Hill descent integration: working
EVAP temp sensor input: working
Fan relay outputs: relays connected but fans not yet wired up
A/C switch input: working (read from Freelander cluster)
Trinary switch input: working
A/C clutch output: working

r75ecuinfl1-20112023.png
Click to expand...
Do I assume this info is captured using the scan tool you sell?

I have not seen any replies yet from the engine ECU to the data the gearbox ECU is putting out but it may be the vehicle needs to be on the move for that.

One other issue you might be able to help with is the coding of the jatco gearbox ECU.
The units are common across all models apparently with just coding to set or configure them. Could your tool do this?
The 1.8 gearbox ECU. From the r75 won't operate the sports manual shift that the Freelander has , a gearbox map for a 1.8 may be better than a V6 or td4 if it's possible to make the sports shift work? Any thoughts??
 
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