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Author Topic: ECU Swap A3 1.8T AUM HJ TO HN  (Read 3689 times)
Andrej1701
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« on: March 13, 2021, 12:02:38 PM »

After i bricked my ecu and dont have the equipment to boot it, i ordered an ecu from an other 1.8t aum engine with 210 ps tuned by an popular company.

My ecu has the serial number : 06A 906 032 HJ

The ecu i ordered has the serial number : 06A 906 032 HN

The clue is that the ecu i ordered has got the immobolizer deactivated and thats why i think its plug and play and get the car started.

Also i readed in the fr that HJ and HN are near to similar.

Am i right or what do i need to code ?

LG
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_nameless
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« Reply #1 on: March 13, 2021, 03:21:42 PM »

hardware wise they are the same. one is 150 factory tune and the other is 180. hardware wise all a chassis wideband 1.8t cars have the same ecu hardware only differences are calibration. so if the ecu runs your car without issue youre fine
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Andrej1701
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« Reply #2 on: March 16, 2021, 07:59:04 AM »

I plugged it into my car but the car is just cranking and wont start

In VCDS the code is : 01177

Does someone have experience or can help?
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Sandstorm3k
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« Reply #3 on: March 16, 2021, 08:06:23 AM »

I plugged it into my car but the car is just cranking and wont start

In VCDS the code is : 01177

Does someone have experience or can help?
http://wiki.ross-tech.com/wiki/index.php/01177
http://wiki.ross-tech.com/wiki/index.php/Immobilizer

Should probably adapt the immobilizer with VCDS procedure if you haven't. I recommend you to get the hardware to fix your original ECU as it seems this is getting way to complex for no reason. Fix it in bootmode, do it properly.
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Andrej1701
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« Reply #4 on: March 16, 2021, 08:32:24 AM »

Yes i will buy the right equipment for that.

The code is 01177 64-10

I readed that it may be the KI . I bought the ecu from an golf mk4 1.8T AUQ
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_nameless
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« Reply #5 on: March 16, 2021, 09:54:23 AM »

Yes i will buy the right equipment for that.

The code is 01177 64-10

I readed that it may be the KI . I bought the ecu from an golf mk4 1.8T AUQ
my assumption is the ecu isnt immo offed
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Andrej1701
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« Reply #6 on: March 17, 2021, 06:19:55 AM »

Yes looks like the immo of the ecu isnt offed right ..

I will send it back and ordered an ecu that runs fine
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stuydub
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« Reply #7 on: March 17, 2021, 09:15:55 AM »

my assumption is the ecu isnt immo offed


Your assumption was correct immo off had bad checksum...cant trust certain people
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Andrej1701
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« Reply #8 on: March 30, 2021, 05:42:15 AM »

Now i ordered an other ecu with immo off but my vcds isnt going into the channel 1 engine.

It has the same issue as before : 01177 64-10

Why is it not going in the channel 1 ? What should i do?
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_nameless
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« Reply #9 on: March 30, 2021, 07:58:22 AM »

Now i ordered an other ecu with immo off but my vcds isnt going into the channel 1 engine.

It has the same issue as before : 01177 64-10

Why is it not going in the channel 1 ? What should i do?
If you cant connect to the ecu its bricked.
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Andrej1701
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« Reply #10 on: March 30, 2021, 10:04:43 AM »

Okay sorry my bad  Grin
A pin wasnt straight and thats why it didnt communicate with the engine ecu.

But my ecu shows the Extra Number : XXXXXXXXXXXXXX XXXXXXXXXX

Is that how it should be with immo off or is there something wrong?
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stuydub
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« Reply #11 on: March 31, 2021, 03:21:44 AM »

No data or xxxxxxx in extra shows it’s immo off
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Andrej1701
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« Reply #12 on: March 31, 2021, 02:07:16 PM »

So i got the problem solved  Cheesy Cheesy Grin

It was an gas filter which was completely full which i had to replace.. omg so dumb..
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