NefMoto

Been having mystery problems with my 2003 Jetta AWP (1.8T/5-speed/Wolfsburg) for about a year intermittently. Been to multiple shops and so far no one has been able to find a definite cause. The latest shop suggested the ECU may be at fault so I grabbed one from the local pull-a-part. The ECM I pulled out of my car had a date code of 2007 so obviously some one has done this before. The part numbers are the same (06A906032LP) on both ECM's and the one I pulled was from a 2003 AWP GL. Plugged the junkyard ECM up and the car will start and immediately die. I assume due to the ECU flash being incorrect. I already have a cable that I use to tune my Triumph (much less complicated) so I find this software and give things a go.  Which leads me to my questions...

Is there a way to copy my Immobilizer info from the potentially faulty ECU so I can just toss it into the 'new' one?

I wouldn't think the tune itself on the faulty ECU is bad as it runs fine 1/2 the time but just in case I'd prefer to just run a fresh flash, is there an updated file that works well on a completely stock AWP? I'd found one that was suggested but when I attempted to flash it in the program gave me an error due to the Immobilizer so I assume I need to address that first?

There are two different memory types in your ecu.

1. The flash. Stored on the 29F800BB eprom. 1024kb in size, stores the calibration.
2. The eeprom. Holds adaptations, immobilizer data, and other vehicle specific information. It is stored on the 95040, and is 512 bytes in size.

You need to copy the data from the eeprom in the old ecu. You can do this with Argdubs tool (please read the "Understanding/retrofitting Immobilizer" Sticky in the Cluster and Immobilizer section), with a chipreader and an SOIC-8 testclip, OR just by swapping the physical chip from one ecu to the other.

You may also choose to read the login code from your old, and new ecu, and adapt them using VCDS. Many ways to skin a cat.

Welcome, and good luck :)