Friends on the forum - any idea the best place to source on of these? Also, anything to look for serial number wise etc? The transmission shop has rebuilt the whole valve body, replaced everything, reflashed and yet still the problems exits, so TCM is the theory of the moment. Thanks!

 

Can you be more specific about the remaining problems? What are the symptoms? Is it throwing codes? It is very rare for one of these TCM's to go bad and it is difficult to swap them out. After installation, the car will not move until an OEM Jaguar diagnostic system re-programs the new TCM to your car. Therefore, it is worth your time to eliminate every other possible fault before calling the TCM.

Good Luck
Jeff

 

any used tcm will plug and play if it's from an 04-05 xj 4.2 na. used tcms from another car like an s-type or an xk can be reflashed with the right calibration with ids

 

Wrong.

The TCM is matched to the specific vehicle's PCM, including 04 - 05 XJ's.

The car may, and I say "may" run and drive after install, but you will have a permanent P0610 code.

You need Jaguar diagnostic software to properly code the TCM into the donor vehicle/tranmission.

TCM's can be swapped from S Type and XK and even XJR's - but again, need to be flashed and calibrated to the PCM.

 

You can look on ebay.

Now, when you say they reflashed the TCM.... how?

Frankly, the trans ship should be sourcing or giving you information accordingly.

What is the issue(s) currently? Any codes??

 

Gents - sorry for the late reply, the trans shop was a disaster - but I was able to find a new company and go to the shop and help them fix it myself. They swapped out a TCM, did not flash it properly and then when they got confused got very condescinding with me about "marrying my problem" etc etc. This is after I paid them $5k!
Here was the fix -
I had them put back in my original TCM - updated and reflashed with IDS and then cleared the adaptions. The shop rebuild the valve body very nicely, but just could not figure out the programming/TCM side of things until I physically sat with them. UNREAL. The good news? I drove 1200 flawless miles this weekend in and out of the mountains from Vegas to CA and it never missed a beat. Super happy, just made it took eight weeks and all this fighting to get it done. As always, this forum knows more than most "pros" who don't want to listen.

 

This is what was happening - but LIMP mode. They got a donor from an S type. My original was fine, they just did not know what they were doing.

 

Great news indeed. Your original TCM is still matched to the car so as you see if everything was rebuilt around it and they just put yours back... smooth sailing.

A great end.... enjoy!

 

Yep, smart move making them put the original TCM back in and clearing adaptions.

Looks like all is good ?

 

Just as a matter of interest - If one is going to re-flash the TCM the adaptations should be cleared first - according to Jag.

 

Many times the IDS software will tell you that the ECM needs updating and TCM adaptations cleared so the time to configure will be longer, DO YOU WISH TO CONTINUE?

Make sure the battery does not die during configuration.

When I worked at the dealer, we were warned about voltage drop and Jaguar would NOT reimburse for damaged control modules due to lost power during configuration.

 

Agree totally. The car battery is not sufficient to provide power for programming. Clearing codes and adaptations should be OK but not programming.

 

1,000% correct!