ECM and TCM questions
 

Hi all.
I have 2 questions.

1. I have an ECM that appears defective. I have bought a second hand ECM which matches the original. To program the second hand unit, from what I can tell from the forums and the electrical guides, I need to record the original VID block using the ISD. Then disconnect battery, swap ECU's. Reconnect battery.

Then I assume after connecting a battery maintainer I use the Configure Exisiting Modules to program the second hand unit to match the original vehicle.

2.With regard to the TCM I assume I have to clear it first before I run the adaption routine? I tired without clearing and nothing shows up in the ISD. The auto transmission has an abrupt take off from standstill and is a little harsh from 1-2.

Thanks for help in advance.

Unfortunately, you may have purchased an expensive paperweight.


Here's the info, straight from Jaguar, via Gus:


http://www.jagrepair.com/images/Trai...es/870B_SG.pdf


Read pages 1-8 through 1-10. It describes how once the VIN is written into memory, it cannot be overwritten.

The note on page 1-10 is even clearer:

"Once a PCM is configured to a vehicle, it cannot be reconfigured to another vehicle."

The same page also mentions: "The new PCM must be configured to the instrument pack as part of the security system set-up. If this is not carried out, the engine will not start."



The way I understand it, if you need to replace an ECM, the only way to do it is with a new unit, not a used one.

hmm is that true for 2003 s-type? This article refers to pre 2003 models. Plus Im sure I read forum blogs that allows swaps, maybe im wrong?

Um part of this is true . The vin will miss match
. But I will tell you from experiance , you can in fact use second hand modules for the ECM and TCM and also the Cluster . I have swapped these for used parts and none are from the same vehicle . And my car runs fine .
The BIG thing to remember is never try to start the car untill the module is configured . Or your in big trouble . (PATS shutdown)
My old TCM had was recently bricked .(IDS laptop crash during adaption reset)
And has one out of another car . Thanks to Jaguars f---ing ids coded access !
, And I will say it was very rough and mixed up whilst relearning adaptions.
Mine has always had the cold trans surge . And this was amplified to unreal proportions untill the learning process was achieved . Still has it but its back to how it was (normal/bearable) before swapping TCM .

So this "Once a PCM is configured to a vehicle, it cannot be reconfigured to another vehicle."
is untrue !

Cambo has also swapped a few before as well .

I'm sure the replacement PCM has to be configured as new module .
.
What exactly did you do with the TCM . Reprogram? Or adaptions reset ?or both ,

The original PCMs (PCM150 i.e. non-Denso) can't be reprogrammed using IDS/SDD but the Denso ones can - usually with some serious pain along the lines already posted. Quite easy to get a bricked car. See various existing posts.

The earlier ones have 150 pins, and could presumably be reprogrammed by removing/replacing chips but no-one seems to do this and with the cars so cheap and old this seems unlikely to be a hot topic.

Thanks all for the responses.

I had an issue with 2 error codes, I posted in another thread, hence the need to replace the ECM.

So to be clear the process for the second hand ECM (Denso) would be:

1. Attach battery maintainer.
2. Copy VID block via ISD/mongoose.
3. Disconnect battery.
4. Remove original ECU.
5. Connect second hand ECU.
6. Connect battery and battery maintainer.
7. Connect ISD/mongoose.
8. Do not start the engine.
9. Use the Configure new module option for the replacement ECU,
10. Finish and start engine

Re the TCM, because of the abrupt start in 1st and sometimes rough transition from 1-2.

I tried to run the adaption routine but when it started the area where I assume it has the things you need to monitor shows nothing.

I assume my mistake was I needed to run the reset first, correct?

No do not program the tcm or pcm with a mongoose! That's too risky.
You need a Vcm1

Really, why is that?

Almost all (perhaps all) of the clones are inadequate for some of the functions.

People have found a reflash taking many many minutes with clones that's a few seconds with the right tool. Or that the reflash fails leaving a bricked car.

Depends how lucky you are or feel.

Do you mean a cloned Mongoose or the real deal? Mine is the real deal.

Just from personally experience bricking or no communication on my 03 STR pcm... I have a clone mongoose pro and a copy of ids v131. I've reprogrammed my pcm from aka new module before. It is possible with the cheaper equipment but as stated by the fellows above more risks.

Jaguar says to use nothing other than rotunda as a pass through device in conjunction with IDS/SDD .
And it's true most s type modules that become bricked are from low voltage or incorrect
Devices used for programming .
In saying that my trans was last programmed with an autologic scanner