Immobilizer II ECU Swapping

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Ross-Tech is not responsible for any damage or problems that may result from following these instructions. They are to be used at your own risk. As always, you should refer to a Factory Repair Manual for your vehicle!


ECM Matching


  • Battery voltage at least 12.5 V.
  • Immobilizer II ECM

[17 - Instruments]
[Adaption - 10]
Leave channel at "00"
[Done, Go Back]
[Close Controller, Go Back - 06]
Turn ignition OFF for 15 seconds. Start vehicle.


  • For cars with a separate Immobilizer (Includes 2000+ EuroVan, Cabrio, and many older non-US models), use [25 Immobilizer] instead of [17 - Instruments]. The rest of the procedure is the same.
  • On some Euro Audi models with Immobilizer 2, the PIN/SKC will be required.
  • On NAR market Cabrio models produced after 05/1999 the PIN/SKC may be required. This split is noted here

Activating Cruise Control on a new ECU (DBW)

DBW (Drive-by-Wire) Factory fresh ECU's often come with cruise control de-activated.

[01 - Engine]
[Login - 11]
Enter 11463 to activate cruise control
[Do It!]

Note: See this page for additional CCS details: Checking Cruise Control using Measuring Values


The new module will need to be coded. Enter the coding from the original module if possible. If the original module is not available, or did not communicate, refer to the coding chart in VCDS or the factory repair manual.

Special Notes

On some Gasoline engines you may need to complete the Throttle Body Alignment (TBA)

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