Local guy claime he can set a B6 A4 ECT to IMMO off over ODB port.

[Luxus Panzer]

Is he right out to lunch?

Everything I have read points towards having to ground out a wire to put the ECU in "boot mode" before making changes to the code to reflect "immo off"

Please advise.

[EuroxS4]

It can be done over obd.However you need some expensive software and know what your doing.However this is only useful if the ecu is still in the car.


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[Gin+]

Can be done x2, but I suspect the ecu and cluster may need to match prior to disabling the immobilizer.

[Luxus Panzer]

Can be done x2, but I suspect the ecu and cluster may need to match prior to disabling the immobilizer.

THIS would be an issue as the 2X ECUS I have are both donors form the yard.

Once I have a donor ECU set to IMMO off (by whatever means) will it play nice with my stock cluster?

[walky_talky20]

Why not just adapt the Immobilizer normally? It isn't that difficult.

[Charles.waite]

Why not just adapt the Immobilizer normally? It isn't that difficult.

This. It can be done over OBD2. Courtesy of our very own imnuts: https://sites.google.com/site/imnuts/

[walky_talky20]

Yep. Rip that SKC out like it's your job. Adapt IMMO with VCDS, then smoke all 4 into the sunset.

[Gin+]

Once I have a donor ECU set to IMMO off (by whatever means) will it play nice with my stock cluster?

Yes

This. It can be done over OBD2. Courtesy of our very own imnuts: https://sites.google.com/site/imnuts/

I'm fairly certain, this method still requires the matching cluster.


Fool proof method IMO; cheap ebay blue kline ODB2 cable and me7_95040.exe

http://nefariousmotorsports.com/foru...c=5068.0title=

Do it attached to the car if you don't/can't want to build a bench harness.

[walky_talky20]

I'm fairly certain, this method still requires the matching cluster.

Well, it requires that the cluster be matched. So you would just have to do the procedure to match the cluster to the donor ECU.

So you would need to rip the SKC out of both ECU's (existing and donor), or rip the SKC out of the cluster and out of the donor ECU. The latter is the way I usually do it as SKC extraction from the cluster is really quick with VAG-TACHO.

[Charles.waite]

^^ that.

[walky_talky20]

^^ you.

[Charles.waite]

^^ you.

[Luxus Panzer]

Thanks everyone.

I will get my 2 donor ECUs installed in my car and read there original SKCs. I can then adapt them to have SKCs that match the original SKC from my car.

Then I guess I do not have to worry about IMMO ;)

In just need to find a new rain tray first at mine will NOT survive another removal :(

Question..could in use this same method to adapt a ECU with a tune to my car?

[MetalMan]

Thanks everyone.

I will get my 2 donor ECUs installed in my car and read there original SKCs. I can then adapt them to have SKCs that match the original SKC from my car.

Then I guess I do not have to worry about IMMO ;)

In just need to find a new rain tray first at mine will NOT survive another removal :(

Question..could in use this same method to adapt a ECU with a tune to my car?

My understanding is that ECU tunes are completely separated from the IMMO chip (assuming the tuner didn't turn IMMO off).

BTW I went through the process of buying a new/used ECU, reading its SKC, reading my car's SKC (via original ECU), and adapting new/used ECU to my car's IMMO. Worked great. [I swapped in a stock ECU after reinstalling stock turbo, coming from an APR Stage 3+ ECU]

[Human Garbage]

My understanding is that ECU tunes are completely separated from the IMMO chip...

You are correct. Independent chips for each.

When I clone ECUs I either flash my original eeprom onto the new ECU or flash a virgin eeprom that will pair without a SKC via VCDS. I always do it on the bench as I built a rig years ago. Longest part of the process is installing the new ECU in the car, although I have that down to about 5 minutes now due to practice.

If the guy the OP referred to can do it over the OBD port he is a hero. On my B6 I can't even read the eeprom reliably. Then again I use free command line s/w...

[walky_talky20]

Lol. Accurate.

[5ktq]

You could theoretically have the tune tied to values in the eeprom, so it could for example, revert to using stock maps if you change the VIN, immo-ID, etc. I don't know if commercial tunes do that, but it is possible with enough effort.

[5ktq]

I should add, using the immo tool from nefmoto, I've only ever got it to write or read in boot mode. The tool is supposed to work in OBD mode as well, and could write in OBD mode, but the guy has intentionally made it not do that (as it would make cars easier to steal or something)? Maybe OP's tool lacks that restriction.

[Gin+]

Well, it requires that the cluster be matched. So you would just have to do the procedure to match the cluster to the donor ECU.

So you would need to rip the SKC out of both ECU's (existing and donor), or rip the SKC out of the cluster and out of the donor ECU. The latter is the way I usually do it as SKC extraction from the cluster is really quick with VAG-TACHO.

I see the logic and as long as it gets the job done the rest is moot.

I should add, using the immo tool from nefmoto, I've only ever got it to write or read in boot mode. The tool is supposed to work in OBD mode as well, and could write in OBD mode, but the guy has intentionally made it not do that (as it would make cars easier to steal or something)? Maybe OP's tool lacks that restriction.

It only works over OBD mode to read if the matching cluster is present. The tool will only write in boot mode regardless. Good chance the write block is intentional since the ebay tools don't seem to have a problem with it.

[EuroxS4]

If your swapping ecus it's much easier to copy the immobilizer chip 95040 and flash the contents to the immobilizer chip on the donor ecu.Install and be done.


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[Luxus Panzer]

If your swapping ecus it's much easier to copy the immobilizer chip 95040 and flash the contents to the immobilizer chip on the donor ecu.Install and be done.


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Interesting. .how is this done?

[5ktq]

Interesting. .how is this done?

use this

http://nefariousmotorsports.com/foru...8.0title,.html

Need to rig a obd <> ecu harness, open ECU and short a pin to put it in boot mode, dump the eeprom from one.
Then plug in new ECU, do the same but write. It's now a clone of your stock one. (VIN/immo/etc wise)