Swap 8D0907551K with 4B0907551F

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Turbofun

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	Swap 8D0907551K with 4B0907551F « on: September 15, 2015, 12:48:15 PM »

Hey
I have a A6 2.7TT 01 with a 8D0907551K ECU that I am replacing since it's dead.
Got a A6 2.7TT 99 with 4B0907551F that should be similar.
Dropped it in the car, tried to adapt with Vag Com but no luck.
I pulled the 95040 and read out the 551K, it tells me 5B 23 which is 9051 swapped on my calculator.
So guess that is the key.
When I read the 551F that I tried to adapt, it tells me FF FF in the fields for key. Guess the
adaption sets back to factory reset ? so FF FF is same as blank.
Will try to start the car tomorrow, not sure it soldering the 95040 over to a new ecu works?


« Last Edit: September 15, 2015, 01:00:37 PM by Turbofun »	Logged

nyet

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	Re: Swap 8D0907551K with 4B0907551F « Reply #1 on: September 15, 2015, 01:54:50 PM »

Bench flash the new ECU with both the flash and the eeprom from your old ecu.


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ddillenger

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	Re: Swap 8D0907551K with 4B0907551F « Reply #2 on: September 15, 2015, 11:59:48 PM »

FF means you have immo2. No login stored in the ecu.

You must use the eeprom from the 551K ecu.


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Turbofun

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	Re: Swap 8D0907551K with 4B0907551F « Reply #3 on: September 16, 2015, 01:02:53 AM »

Swapped the chip as well and then Vag Com recognized the 551F ecu as a 551K.
I could also log in, so will try it in the car in a while.


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k0mpresd

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	Re: Swap 8D0907551K with 4B0907551F « Reply #4 on: September 16, 2015, 01:04:47 AM »

Quote from: Turbofun on September 16, 2015, 01:02:53 AM

Swapped the chip as well and then Vag Com recognized the 551F ecu as a 551K.
I could also log in, so will try it in the car in a while.

swapped e2p or flash? because vcds pulls ecuID from flash.


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Turbofun

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	Re: Swap 8D0907551K with 4B0907551F « Reply #5 on: September 16, 2015, 01:25:46 AM »

swapped the 95040 and the 29F800BB psop 44.
This ecu came with a Dahlback socket so had to swap it instead of flashing it.


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ddillenger

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	Re: Swap 8D0907551K with 4B0907551F « Reply #6 on: September 16, 2015, 01:44:49 AM »

If you swapped the eeprom and flash, and the ecu boots, you are good to go.


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Turbofun

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	Re: Swap 8D0907551K with 4B0907551F « Reply #7 on: September 16, 2015, 02:53:17 AM »

I would have thought so but no luck on start
Immobilizer test status in Vag Com says ERROR.
Think I will try the immo delete for the 95040 eeprom instead.

17978 - Engine Start Blocked by Immobilizer
P1570 - 35-00 -


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Turbofun

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	Re: Swap 8D0907551K with 4B0907551F « Reply #8 on: September 16, 2015, 03:52:13 AM »

The 551F is immo 2 and 551K is Immo 3, is there some way that could f*** things up?


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Turbofun

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	Re: Swap 8D0907551K with 4B0907551F « Reply #9 on: September 16, 2015, 10:06:33 AM »

Found a immo software that probably do much the same as the one from this page.
Read the 95040, "repaired" it, soldered it back in and car started straight up.
Just to repeat the sucsess I did my own A4 for fun and it worked Cheesy


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