Swap pcm chrysler

[alfons37]

I have chrysler 300m 2001 and have code p0601 = Internal Control Module Memory Check Sum. And mil lamp flash. I have buy another pcm but not new pcm. I wonder if i can desolder chip from pcm and change vin number in hexdata and solder back on next pcm. And if i can change immo code in this box.

Best Regards Fredrik

[msher]

Why do you need to do it? You can just swap your pcm with that one you bought from junk. Who cares about vin in pcm?

[alfons37]

Problem is it car start 2 sec and dead, immo is on and not synced so skm modul dont talk with pcm

[pimpin]

hi you have reprogramming the key with the pcm :top:

[supryze]

Hello! I have found that writing a VIN to a Chrysler PCM is a common feature among Scantools. If you have at least a Snap-On, it should be able to write the VIN for you.

[ATHANASSIOS]

Hi my friend, u need a drb 3 factory scanner,go to the skim, also u need the skim pin # ( u can call ur dealear give him tha last 8 # og ur vin # & he will give u the pin #) enter the skim functions, & select pcm replace, aotomaticly the skim module will wright the new vin in ur used pcm. It takes like 5 minutes to do.

[kevinb2u]

Have spent much time, and have learned alot from the great guys here on DK. You're all greatly appreciated. for your knowledge, experience and generous sharing.

I've worked in Chrysler and GM dealers for many years. Have an independent shop 11 years now, while trying to make the most of resources without breaking the bank, and trying to keep up with dealer level information and capabilities. This forum is another valuable , even priceless resource. Have spent many hours reading , learning and trying to contribute when I can.

Having trouble learning about all the different software and hardware and it's uses. Maybe for another thread - but I have not found a good starting point to learn "what's for what". Probably being too general, maybe should work on one at a time. Mostly now wanting to help myself and others learn about programming and coding ECM's, and the different methods for different makes & models, both in the US and worldwide.

So here's a specific issue that I have some knowledge, but want to learn much more. Pasted below is my email to a tech support guy at a "tuner" company, have not heard back. Since 2000 or so, there's been changes in how we can swap failed Chrysler PCMs with good used modules. Please read on and share if you can...Thanks to all !!

-----------------------------------------------------------


Been revisiting the issue many times in past years..

This time trying to make a used PCM work in this 2000 Dodge Van. Original PCM (JTEC) had power supply failure. The used PCM works fine, and I successfully flashed with DRB3 and Chrysler DealerConnect with latest update. I also have a CarDAQ+, but did not use it this time.

The trouble is that the ABS module kicks a code "MISMATCHED VIN", and there's no (easy) way to change or clear a VIN in a Chrysler computer, though a VIN can be added on a "new" reman. SO with this van, we would need either a "new" $800 PCM, or a new $400 EBCM that would learn the existing PCM VIN, to have the ABS light be out like it should. Not on this van, but others might also have trouble with SKIM security and airbag modules.

I use the OEM software and hardware, but you can only write a VIN to a new/reman, fresh computer, and not one from the salvage yard that already has a VIN stored. Not about security or theft, just want to be able to configure a used computer, and not be at the mercy of the big companies.

BTW, it's easy with GM to write a new VIN to a used PCM when reprogramming, the PCM has to match the car it's running on. It's a big help to be able to try a salvage yard computer to replace an original one with a hardware failure.

Trying to figure out how the rebuilders, like Cardone, Standard and others can clear the VIN so that the replacement part can have the correct VIN entered with the DRB3. Also I see companies online like http://bgspecialists.com/ (mhtml:{3B2771A7-B48F-4BA3-BC33-A62A50C61F22}mid://00000451/!x-usc:http://bgspecialists.com/) that can do this process, this one charges $130. I want to learn, or where to start learning how these guys do it. Been reading on what's involved with the "tuner" guys, about dumping the ECM's and manipulating the binaries. I'm not interested as much about messing with the performance side of things, but wondering if we can find where the VIN and other flags like theft deterrent config is located, and if/how it can be edited.

Any help, advice, or whatever is appreciated. I would gladly pay (within reason) for hardware, software, licensing, or "secrets" that will help proceed.

Thanks again for your time...

[kevinb2u]

I have chrysler 300m 2001 and have code p0601 = Internal Control Module Memory Check Sum. And mil lamp flash. I have buy another pcm but not new pcm. I wonder if i can desolder chip from pcm and change vin number in hexdata and solder back on next pcm. And if i can change immo code in this box.

Best Regards Fredrik

All the Chrysler modules I've seen are sealed in "potting" compound. Be difficult if not impossible to get at board to do anything. Been wanting to figure out how the rebuilders do it, believe there's special procedures and chemicals to dissolve the silicone compound. Have read somewhere maybe can dig and scrape. I've tried that on old PCMs, it's tough. :(

[ray-ray]

if you have a donor pcm and you get the skim or ariel around ignation from the same car.(it will match and start after you program the key)you also need to get the vin off the donor car to get a pin number from dealer or locksmith.

[kevinb2u]

if you have a donor pcm and you get the skim or ariel around ignation from the same car.(it will match and start after you program the key)you also need to get the vin off the donor car to get a pin number from dealer or locksmith.

I think the PIN is in the SKIM module, should not be problem matching SKIM with another PCM, but I could be wrong. I do know SKIM and key programming is fairly easy with DRB3.

[sogaro]

With Skim reader and reprogrammer tool you can edit the vin in the Skim of any Chrysler , Dodge, Jeep vehicles and with Cardaq or AVDI you can edit the VIN in the ECU so it matches that on the Skim. And then program a new key to it. You may need to connect to techauthority.com for downloads if necessary

[kevinb2u]

With Skim reader and reprogrammer tool you can edit the vin in the Skim of any Chrysler , Dodge, Jeep vehicles and with Cardaq or AVDI you can edit the VIN in the ECU so it matches that on the Skim. And then program a new key to it. You may need to connect to techauthority.com for downloads if necessary


Thanks, what reprogrammer tool to edit vin in Skim?

What software to use with Cardaq+ (I have one)?

What is AVDI? I have AD T300 (clone) key programmer, never thought to try on this van, there's no security system.

Thanks again....

[sogaro]

Thanks, what reprogrammer tool to edit vin in Skim?

What software to use with Cardaq+ (I have one)?

What is AVDI? I have AD T300 (clone) key programmer, never thought to try on this van, there's no security system.

Thanks again....
Skim reader (http://www.getskim.com/)and AVDI (http://www.abritus72.com/avdi.html) . Cardaq does not need any special software as the software that comes with it will do it under 'Flashing" tab

[kevinb2u]

Skim reader (http://www.getskim.com/)and AVDI (http://www.abritus72.com/avdi.html) . Cardaq does not need any special software as the software that comes with it will do it under 'Flashing" tab


Thanks, will try it tonight. I don't understand how we can edit VIN or anything else without some external software communicating through the CarDAQ.

[sogaro]

Here you go again m8 for your info
RapidShare: 1-CLICK Web hosting - Easy Filehosting (http://rapidshare.com/files/411654926/vin_edit.rar)

[kevinb2u]

Here you go again m8 for your info
RapidShare: 1-CLICK Web hosting - Easy Filehosting (http://rapidshare.com/files/411654926/vin_edit.rar)

Sogaro..I tried the J2534 Toolbox again earlier, I guess never really explored the Flash tab completely. Can't believe missed this the whole time, had no idea could be so simple.

See now how GM, Ford, & Chrysler have different functions available. The GM and Ford functions like Ford PATS programming and GM Crank Angle Learn can be done other ways, including the OEM scan tools. But not with Chrysler, a Chrysler dealer can read the VIN, and maybe rewrite SRI mileage, but can NOT rewrite a VIN with DRB3 and DealerConnect, or any other way I know of.

Again thank you so much, can see the forest throught the trees now. Also hope this will help others.

Now also know even more that buying this CarDAQ+ (Snap-On PTPro+) was an excellent decision.

[sogaro]

You are most welcome m8.

[kevinb2u]

Not to push our luck...

Any thoughts on learned theft system status?

Pre-SKIM, let's say a 1998 Jeep Grand Cherokee in a junkyard has a theft detterent system. The 1998 in our shop with failed module does not. That salvage computer will always expect the theft module message to allow a start, and will not work in our Jeep

Likewise if the other way around, if we put the non theft module in a theft equipped vehicle, that module will learn that option and then always expect to see it from now on.

I've heard of ways to unplug the theft module while car ir running might clear the flag. Never had the chance to try it. Usually the donor vehicle is in junkyard and already dismanteled with PCM on the shelf..

Any thoughts on this issue?


Thanks again....

[stomper51]

With the DRB3 in the VIN screen push Page FWD and it will let you edit the VIN if you have a vehicle with skim just use the PCM replaced function under Misc.

[Sleuth]

tricky< sometimes you can leave the key_off>>try to do your flash>>soft times out < switch key on and the soft will ask if you want to update vin

[apooh9]

I recently had a customer with a '98 Caravan that had VTSS active in his used PCM. I used the Cardaq+ J2534 Toolbox and wrote the VIN and used the Skim reset function and it reset it.At least it started after I did the reset so I'm thinking it works on pre-skim as well.

[RobbyD]

All I know it takes me minute to write vin and do SRI mileage change to any used pcm on chrysler or dodges. It takes longer to boot computer up to do job. I use Ease reprogrammer.

[kevinb2u]

I recently had a customer with a '98 Caravan that had VTSS active in his used PCM. I used the Cardaq+ J2534 Toolbox and wrote the VIN and used the Skim reset function and it reset it.At least it started after I did the reset so I'm thinking it works on pre-skim as well.
That's good to know, will try it next chance. That's also quite a collection of OEM tools you have, I'm a little jealous. Is it ironic that the CarDAQ+ can do things the OEMs cannot?
Thanks

[apooh9]

That's good to know, will try it next chance. That's also quite a collection of OEM tools you have, I'm a little jealous. Is it ironic that the CarDAQ+ can do things the OEMs cannot?
Thanks

The Cardaq will also do Ford PATS functions as well. As for OE tooling not doing everything we'd like,I'm not sure if they were designed that way or they just never thought to add the function needed as in your example.

Yes,I love all my OEM toys,they're how I make my living.It's taken awhile and I only buy deals.

[GABEMX]

Thanks, will try it tonight. I don't understand how we can edit VIN or anything else without some external software communicating through the CarDAQ.


Hi m8

If you own a DRB3 you can edit VIN on a used ECM.
This is a work around only for matching used ECM-SKIM
secret pin is a must when matching keys though.
No need to get secret code to match ECM with SKIM.


1- Go to ecm menu
2- find miscellaneus option (usually on second page)
3- select check VIN option
4- once current VIN displays on screen
5- press shift key (lower left keypad) ,notice red backlight lits.

6- press pageback key (at this moment cursor positions on first digit of VIN, use up or down keys to scroll thru alphanumeric digits and right key to advance to next digit.

7- Once VIN is edited press enter key DRB3 will validate new VIN and "VOILA" skim light will go off on the next start attempt and engine will start.

:manuscarf: Press thanks button if it was of help.

[Wolfpack]

Great info on this thread but i have to say Chrysler is a piece of junk. The Mini van is the only decent thing they make.

[kevinb2u]

Great info on this thread but i have to say Chrysler is a piece of junk. The Mini van is the only decent thing they make.

Too bad we don't have much choice what comes in the driveway.

I personally like Chryslers, (& GMs) but biased since worked at dealers for many years. Believing they're easiest to service probably because know them better than anything else.

Might be blasphemy to say here, but we have the most trouble with European cars, likely again because experienced them the least. :boxing:

[Wolfpack]

Will the J2534 Toolbox software work with any other passthru device other than a Drewtech product. I am using an Actia passthru xs. Is there software like the J2534 Toolbox for the Actia passthru xs?

[guanatos]

ok men you need to do rewrite your vin on your new PCM and reprogramming your skim immobiliser if you have snap-on tools or j2534 box tool can you rewrite the vin number of the vehicle is very easy and with you t-300 reprogramming your skim immo and start the engine enjoy

[mytunes]

Anyone know if skims modules are compatible for various years/ models?

Want to do an engine swap from 2005 CRD Liberty to a 2000 Grand Cherokee. Both have SKIM systems.

Would I be able to program the 2005 PCM and use it with the 2000 SKIM module?
Provided I program the 2005 PCM with the VIN # and skim code from the 2000 GC it should work right?

[kevinb2u]

I don't think it would be so easy, there's a big difference between 2000 and 2005. Add to that the different platforms and protocols, you'd have a real mess.

Maybe the better way is to use all the hardware and wiring from the Liberty in the WJ, SKIM module, peripherals and all. Just my thought, not knowing for sure. I do know that when we change VINs in PCMs, the box numbers have been the same. Have changed PCM from California to Federal, to find out the LDP/EVAP systems were different. Have not been able to reprogram a Chrysler PCM with any different calibration that it came with, only update.

It may be possible, the only way to know is to try it, I doubt anyone could tell you it would surely work.

[mytunes]

Thanks for the fast reply :proud:

The Liberty and GC share a lot of the same systems and protocols.

For instance you can take the EVIC from the GC and use it in the Liberty to get fuel milage etc..

Fortunately the 2005 Liberty still used the PCI protocol where I think that they went to CAN-BUS in 2006.

I have access to the SKIM module and key set etc in the Liberty.

I would like to have the GC VIN show up when the PCM is scanned however.

Maybe use the Liberty SKIM and have a reset done on it then program in the GC VIN?

Not 100% sure, but there should be a way.

IIRC the SKIM communicates with the PCM via PCI bus so in theory maybe the GC SKIM would work. Hard to say without with trying it I guess.

[kevinb2u]

It's worth a try, only way to know for sure. Hopefully anything you change can be recovered if needed. I'll be curious how it works out.

[mytunes]

It's worth a try, only way to know for sure. Hopefully anything you change can be recovered if needed. I'll be curious how it works out.

I'll be sure to do a full backup of the PCM before starting.

Crossing fingers LOL

[kevinb2u]

I'll be sure to do a full backup of the PCM before starting.

Crossing fingers LOL
Now I'm lost, how can you do a full backup? If there's special hardware or software, that's what I've been wanting to learn.

[mytunes]

You can read everything from the PCM using a BDM device.

Normally the VIN # is stored is the serial EEPROM. Not sure if the PCM also stores the 4 digit SKIM code or just the SKIM module.

I am getting a J2534 pass thru device and using the J2534 toolbox from Drew Tech you can change VIN in PCM and also reset SKIM

I would think it's also possible to use winols to change VIN in PCM's serial EEPROM that way.

[sogaro]

The PCM stores the 'secret code' from the Skim in it so without a Skim reset you car won't start. Changing vin alone won't suffix.

[mytunes]

The PCM stores the 'secret code' from the Skim in it so without a Skim reset you car won't start. Changing vin alone won't suffix.

Thank you!

You don't happen to have the address location in the serial eeprom do you?

I can't remember if it was this forum or another where the posted the correct hex values for the decimal numbers.

I'd imagine I would be able to search for it that way.

I know the address of it in the SKIM module but that doesn't help me since I will be leaving that the same.

[sogaro]

You need Dealer tools to do it as far as i know and they are pretty very expensive

[sidepipe87]

Thank you!

You don't happen to have the address location in the serial eeprom do you?

I can't remember if it was this forum or another where the posted the correct hex values for the decimal numbers.

I'd imagine I would be able to search for it that way.

I know the address of it in the SKIM module but that doesn't help me since I will be leaving that the same.


Were you ever able to find the address location in the PCM?

[aglinsky]

Sometimes possible fix P0601 with this solution: https://carscanners.net/how-to-error-p0601-repair-jeep-gra…/ (https://l.facebook.com/l.php?u=https%3A%2F%2Fcarscanners.net%2Fhow-to-error-p0601-repair-jeep-grand-cherokee-ecu-by-myself%2F%3Ffbclid%3DIwAR1XVYCrbGXrDUtMnQPyWg1wjxP qSajkKsZxlYr0_2RCJArD1Wqeu-IXvJE&h=AT0wqJC0SqpTCNqHJtKJHN03Ely55ny-p36gZUoBuN18OBgjQvHR1m3p4VvBduNXGuQiu4iahYHbov4dys 4gzYQStrCzjpM7XaPVdK6ozKCqi29yVjISFT8SJhzf6JVr6Ll5 Q8G6XAEKuQ0GWmMvYszXPNzSsbj4dVHMoUF6TDqvnEOPAGvHu4 3zS0KG9PwCYvgojXzvTHf0XTw02fUqihemFFRGaMhUify0jBIk ofc_XYsDynuyWs4R30J5bGOjA1o-6w5tBBm6zPdswp6v3J-s4Pn3GPEl17rZywjFLVYCpVCnpvxIwV16aixQGFovv9l7LVzxI K7o6NAAfLJbWHYZXdu5vrXUy5DYDq_0rBQlabpFieBV_AndJqk AVju3A51lguYZWcVj7VTyuo0yXXMxSNltgHmCsB-8i_PT9AVvdY45zoH8lmOm8EeZalk5TKOY7AzoZ_zuyqZJiOgbU us7AZVgLBjCJ1oBK8rZWkNt7wTu6NOAitSC2bflEMM1C9tKzMn aS5NINnK-5N4LClPucxbFv_gh4XlZ1EiJmpTnAhaEB_3OfGDJwDhyfaNzoE Dj7Ly0yOccOlI_edba7V-6-bYwA6xqkl1ZtZ4ZGdISBMhNs6PZAAoBkBra0C9K9nLbQn0)

[alclot]

Hi mates,
I found so intereting this post. Can anyone recomended me a tool which can modify vin and update flash on SBEC III chrysler ecm?
Thanks in advance ;)

[hunter123xyz]

I realize that this a rather old thread, but just wanted to thank you all for your great information, Finally, I was able to get rid of the a SKIM module, by using a SNAP ON PRO III device and the Drew Toolbox J2534 software running under Windows 10, I kept my PCM, as the issue was with the SKIM module itself, so I just disconected the battery, then the SKIM module, then I did a SKIM/RESET, and VIN and SRI rewrite, and the engine started right the way. Thanks again and regards to all of you.