VX VY PCM bin swapping = brick ahhhh :(

[TTVN]

iv run out of pcms now and none of the bricks will connect

it does erase the sectors before writing im sure

anyone know where to get sockets and an adapter for a gq-4x

think im just better off burning the damn bin lol

[VL400]

I get all mine from http://www.darkwire.com.au/ but he is closed for new customers Not sure of any others but there would have to be heaps around. Can reprogram the PCMs if you cant find any adapters.

Wont make you feel any better but have just tried writing all the bins on this site. As a test also erased the EEPROM (all FF's) and then wrote all zero's and could still connect ok in both states - just couldnt identify the BCC or VIN of the PCM obviously. So not sure why it all went wrong

[VX L67 Getrag]

I'm not sure if I have this right, but were you trying to write a VY bin on a VX car?

If thats the case wouldn't the vin number for it be wrong & radio not work even if it did write properly & the bcm code would be different so unless check sum AA & the vats masked it would have security issues?

But also on another note wouldn't the cal data be different & may not suit the model?

I should start this in another thread but with the issues we're having with the check sum if we don't AA the prog id is the quickest way around it once it comes up with the warning check sum not right this is what i should be ****, can we just click cancel & disconnect(flash tool) go into tuner pro & manually change the check sum to what flash tool said & then write again?

[VL400]

Was on the bench but was just trying to prove that the PCM was not bricked by having the wrong cal (VX in a VY bin, 07 and 06 programs) or no EEPROM data. The engine def would not have ran and would have been some unhappy things in the car!


TP cant get the checksum right so for now the easiest way is to use what the flashtool suggests. It pretty much does the same as what your suggesting except without the manual adjusting in TP. You could rewrite just the cal after making the change in TP so its quicker. The correct way would be to answer no to fixing the checksum, ack the write fail and then power cycle the PCM prior to writing the fixed cal.

[VX L67 Getrag]

I might try that next time as allowing it to fix it & re-write & allowing the 800 errors with retry I think it took over 40mins for the 2nd write!

[TTVN]

i masked vats to try and see if i could get it going at all and typed in AA for checksum and it saved as 0 is that right?????

i think i got most of a write when i tried to do the clone off the other pcm but it didnt change the bcc or vin so i dont know whats happening

id like to build a bench harness to get rid of any interference from the car as it could be the problem because all the abs tc and airbag lights r all on and has been since he did the manual conversion

i retried the other pcm and still cant get connection

DW suggested i do the vt pcm conversion and im about 75% through it but i want to get the flashing working

am i correct that after the checksum select box comes up and clich ok for it to use the new calculated checksum it should finish loading and then do a powercycle and it should go??

[TTVN]

does anyone have any xdfs for vx???

[VL400]

i masked vats to try and see if i could get it going at all and typed in AA for checksum and it saved as 0 is that right?????

If you saved AA as the device ID it should be saved as AA. The BCC and VIN is done towards the end, it asks if you want to write the EEPROM.

am i correct that after the checksum select box comes up and clich ok for it to use the new calculated checksum it should finish loading and then do a powercycle and it should go??

Yep, it writes the flash, pops up a msg saying checksum is wrong and you use the new one, it rewrites the bin (that way you know that what was written is correct, if there is a write error the calculated checksum would be wrong), checks the checksum matches now and then resets the PCM. The issue is something is beginning to talk on the bus after the first checksum and when the message pops up, but until I can get some logs from someone (need to use portmon and capture the entire flashing process - http://technet.microsoft.com/en-us/sysi ... s/bb896644) I dont know what. I can easily add in a disable chatter command if thats all that is needed.


For any future problem people have please post the flashtool log (and a portmon log if its reproducable), it will give a much greater chance of seeing whats happening and where its getting stuck.

[TTVN]

once i get some sockets and an adapter ill give it all another shot lol

just dont want to brick another one lol

it only happens after clicking ok to use calculated checksum if cancelled despite the warning the pcm would rebooted upon power cycling and could try again

might just build a bench harness to flash in safety anyway

how much do u charge to socket a pcm vl400???

i did an ls1 pcm socket and didnt enjoy it at all lol

[VX L67 Getrag]

I uploaded a good Stock VX Manual s pack complete bin, I zero'd the first 2000 bits so you should be able to clone the PCM to that & just AA the prog id & mask the vats & should be sweet unless it has the factory radio in it & then you'll need to add the vin to the right area & hopefully that should sort radio security out!

I've just stumbled across some info thank you to someone, so hopefully I'll be able to make the VY xdf & just change it to the VX offsets!

But could take a little while I've got a million things I'm doing at once right now!