V6 Gearbox ECU

bukko · Mar 2, 2014

Seeing as how cheap they are I'm thinking of trying another gearbox ECU.

Is there anything I need to know about these or is it just a case of pulling out the old one and plugging in the new one?

Thanks

td4van · Mar 2, 2014

You need to make sure the part number is the correct one for your engine type and model and also that the software is for your car.

If you send me the part number I can confirm if it's the right one and also if there is the original factory label on the casing send me the software details and I can check what type of engine etc it is for.

Ideally you would need the software updating in the ecu to be sure

zefrench · Mar 2, 2014

There have been reports that sometime in 2004 the jatco JF506E for the NAS KV6 lost its intermediate speed sensor. I read similar reports for the Non NAS TD4. Thus the TCM no longer report on that sensor. The actual pins are not even on the connector. I would match the year 2001-2003 automatic transmission with a tcm from those years and 2004-2006 tcm with a transmission from those years.

bukko · Mar 2, 2014

td4van said:
You need to make sure the part number is the correct one for your engine type and model and also that the software is for your car.

If you send me the part number I can confirm if it's the right one and also if there is the original factory label on the casing send me the software details and I can check what type of engine etc it is for.

Ideally you would need the software updating in the ecu to be sure

That would be great thanks!

The part number I'm looking at is UHC000120.

My car is a 2001 V6 (non NAS).

Brit-car says: "ECU CONTROL UNIT AUTO G/BOX F/L >4A, a replacement part for the Freelander - 1996 to 2006."

zefrench · Mar 3, 2014

Sorry my access to Microcat is offline.

But I did check ebay and here are all the part numbers I was able to find.

I don't know if the KV6 and TD4 TCM (Gearbox ECU) have the same programming, I only know of the change for the Intermediate Speed Sensor.

UHC500160
UHC500120
UHC500110
UHC000120
UHC000220
UHC000030

I look forward to what td4van says.

td4van · Mar 3, 2014

UHC000120 is suitable for your car and can also have the inter speed sensor software programmed into it.

Different software between US KV6, ROW KV6 and Td4 variants

bukko · Mar 4, 2014

Thanks

Will give it a go and let you know...

zefrench · Mar 4, 2014

When changing the TCM for the Jatco JF506E is in other cars, for example the Jaguar, there is a specific process to make sure the TCM (automatic transmission gearbox ecm ecu) re-learns instead of using it previously learned values.

transmission compatibility question - Jaguar Forums - Jaguar Enthusiasts Forum

I presume the same is needed with our Freelander, but so far I think this means using a more advance reader

Thus
T4 Testbook

I wonder if any of these advance readers could do the same thing:
Autologic
Blackbox
Lynx
HawkEye

Nodge68 · Mar 4, 2014

The Jag forum isn't a bad link if you want to change your own valves. However don't use cinder blocks as suggested to hold a Freelander up in the air, they are far too likely to crumble under the weight of it!!

zefrench · Mar 4, 2014

Well according to this manual:

http://www.bearmach.com/downloads/Diagnostic/User Manual.pdf (page 43)

Transmission - JATCO FTO
• Freelander 1
Read Faults / DTCs
Clear Faults / DTCs
Live Data

So it appears the Hawkeye cannot reset a TCM to "default"

zefrench · Mar 4, 2014

Does not seem like the Lynx will do it either:

http://www.lynx-diagnostics.com/downloads/files/lynx_user_manual.pdf (page 40)

Transmission - JATCO
Read Faults / DTCs
Clear Faults / DTCs
Live Data

zefrench · Mar 4, 2014

Nothing from black-box solutions it seems:

https://www.blackbox-solutions.com/shop/help/SM004.html

Specifc page on the Jatco TCM itself.

zefrench · Mar 4, 2014

Autologic looks promising

http://www.autologic-diagnostics.co...retechspecforlandrovervehicles_en_pf_v3.0.pdf

Page 30:

Auto gearbox
Read & clear DTCs
Read dynamic data
Activate components
Flash programming

I know this is a very expensive diagnostic package, but at least it might help tracking down a place to get it done.

td4van · Mar 4, 2014

T4 doesn't have the option of clearing the adaptions in the TCM so I'd be surprised if Autologic did.

zefrench · Mar 4, 2014

td4van said:
T4 doesn't have the option of clearing the adaptions in the TCM so I'd be surprised if Autologic did.

Really it does not? Almost every other application of JF506E I found (the Jaguar, VW and Mazda) made mention of clearing them.

And supposedly those adaptions survive a car battery disconnect.

Any ideas how you are supposed to officially clear the adaptations on a Freelander TCM for the Jatco JF506E ?

zefrench · Mar 5, 2014

According to this:
The 75 and ZT Owners Club Forums - View Single Post - Gearbox and Electrical faults - 75 CDT Connoisseur 51 Auto

Originally Posted by 75Connie
IIRC, the advice Grandy is giving you may be very pertinent. In order to resolve the issue, it required the car to have power, and while the car had power, the specified fuse needed to be pulled to effect a reset. I'm surmising here until someone more knowledgeable comes along, but it seems as though the CAN Bus needed to be active. but to see the gearbox as offline in due course, register that fact within its memory and as a result clear the problem. In any case its worth a try to do exactly as he said, IMHO..

So it seems if we pull that Jatco Transmission fuse and wait a bit while the car is running the transmission will re-learn its adaptation settings.

bukko · Mar 5, 2014

zefrench said:
According to this:
The 75 and ZT Owners Club Forums - View Single Post - Gearbox and Electrical faults - 75 CDT Connoisseur 51 Auto

So it seems if we pull that Jatco Transmission fuse and wait a bit while the car is running the transmission will re-learn its adaptation settings.

Great tip!
I'll give it a go - what's the worst that could happen??

td4van · Mar 5, 2014

Don't know was one of the shortcomings of the Jatco install in a Freelander. Don't think the TCM software supported a reset via diagnostics.

There is some manual process involving ignition cycles and moving the gear lever in a sequence but I can't find it anywhere any more. Knew I should have archived the info better when I got it years ago!

zefrench · Mar 5, 2014

bukko said:
Great tip!
I'll give it a go - what's the worst that could happen??

There is not way that removing a fuse is different (cut in power supply) is any different then replacing the car battery.

zefrench · Mar 5, 2014

td4van said:
Don't know was one of the shortcomings of the Jatco install in a Freelander. Don't think the TCM software supported a reset via diagnostics.

There is some manual process involving ignition cycles and moving the gear lever in a sequence but I can't find it anywhere any more. Knew I should have archived the info better when I got it years ago!

Thanks for the word reset, that helped my searches. Could this be it, is there a button under the gas pedal of Freelanders?

1. Put your key in the ignition and turn ignition to the on position (the position right before you start the car)
2. Hold down the gas pedal pressing the button under the pedal for at least 20 seconds.
3. Let foot off pedal and start car. Be sure that you do no turn ignition off because that will void the reset

from:
VWVortex.com - How to Reset Automatic Transmission

V6 Gearbox ECU

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