Audi Immo 3 deafeat

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Giantmidget

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Hi,

I have a Audi A4 B6 1.8T 140kw manual,the cluster on the car decided to pack up and was not going to pay the dealer 10k for a a new one.I purchased a secondhand unit knowing that the Cluster would need reprogramming, since the car has the immo in the cluster Ecu and key all which needs to cumminicate with each other te let the car start.Installed new cluster and it showed the usual Safe mode,towed the car to the dealer for programming was phoned by the workshop manager who said that they could not marry the new cluster to the Ecu because they could not retrieve the SKC code(bull****),went back to fetch e car the car spoke to the guy who hinted at a new cluster ,so i towed the car to a mate who is a Auto Lec.

We decided to do a Immo defeat because it would bypass the secuirity checks , and the key could be programmed and bob`s your uncle.I towed the car to my friend because he has master skills when it comes to soldering,and the 95040 chip would need to be removed from the Ecu and read through a programmer.We read the date,i edited the data in hexworkshop ,only 4 changes need to be made did that saved the file and dumped the new data on the chip and soldered it back.

Before starting the car i plugged in VCDS and checked for communication on channel 1 ,no luck so no use i even trying to start the car.it was desolder time again and i thought that maybe the 95040 changed the values again,put the chip in the programmer and there it was the data was the same i edited.I did think about just taking the chip from my own cluster and soldering it onto the new one but i have heard that there is no guarantee for success.

Has anybody had the same problems i am thinking of just dumping a virgin file on the Eeprom and test the Ecu for com on the bench,that being said from all the soldering and desoldering the chip broke on of it`s pins so i orderded 25 new ones-minimum limit applies and good luck finding one,they all have to be imported.I also obtained the SKC code form the 95040 with hexworkshop.i just hope my math was correct.Just incase- the Ecu is not bricked and it is still functioning it was tested.
 
Dunno what u saying but it sounds like should have listened to the dealer in the first place.
 
So VCDS could not connect to the ECU? Maybe something went wrong with the soldering.
If you place a virgin file in the ECU, doesn't it mean it needs to be remapped? I mean, it will be clean and remap a few values with VCDS or VAGCOM
 
One slight problem. The uCs in the ECU more than likely have built in EEPROMs and could have a security function implemented whereby a checksum of the EEPROM memory is kept, so it's not to say that what you did wouldn't work (seems highly likely to me that it would), it's rather that you haven't covered all bases.

As for putting in your old 95040 EEPROM, if the pinout is the same and the signalling protocol (95040 seems to be SPI) is also the same, it will work. Just make sure to check the datasheet for the EEPROM in your old cluster and make sure about those two points.
 
Good lord, sounds like you shoulda just spent the R10k. :wtf:
 
Ok car sorted , as for listening to the dealer you are more then welcome to do that yourself,this process saved me R10k.

The M or ST95040 chip is surface mounted on the ECU it contains the data for your immoboliser ,it does not effect your actual EEprom where your management is stored , if people only knew that six edits are made by the tuning companies to your ECU to increase performance.That being said the problem with the 95040 was the checksums were not right ,fixed that and voila car started , used VCDS to adapt key and immo light is off.On some of the Opels you just remove the immo and its defeated,this defeat makes it possible to make your ECU plug and play.
 
So you could have used the old chip if the checksums were correct and the one pin didnt break?

Atleast you have no issues remapping your engine management SW now :)
 
UnUnOctium said:
One slight problem. The uCs in the ECU more than likely have built in EEPROMs and could have a security function implemented whereby a checksum of the EEPROM memory is kept, so it's not to say that what you did wouldn't work (seems highly likely to me that it would), it's rather that you haven't covered all bases.

As for putting in your old 95040 EEPROM, if the pinout is the same and the signalling protocol (95040 seems to be SPI) is also the same, it will work. Just make sure to check the datasheet for the EEPROM in your old cluster and make sure about those two points.
Click to expand...

Giantmidget said:
Ok car sorted , as for listening to the dealer you are more then welcome to do that yourself,this process saved me R10k.

The M or ST95040 chip is surface mounted on the ECU it contains the data for your immoboliser ,it does not effect your actual EEprom where your management is stored , if people only knew that six edits are made by the tuning companies to your ECU to increase performance.That being said the problem with the 95040 was the checksums were not right ,fixed that and voila car started , used VCDS to adapt key and immo light is off.On some of the Opels you just remove the immo and its defeated,this defeat makes it possible to make your ECU plug and play.
Click to expand...

:)
 
Haha , yes Werner it seems we do.Nothing is impossible had a lot of help from the guys over there,but the right tools are also needed.I will be posting a tuned file for the BEx engine up there in the next week or two,just busy making some adjustments and it takes time.

As for the chip braking ,yes if it didn`t then i am sure with the correct checksums it would have worked , you can right over these chips many times,when i ordered the ST95040 from the importer they said i was the first guy to import those,wonder where the other people get them from.I know there is guy from capetown but its also a 6-7 buss day wait.
 
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