ECU Swapping with Immobilizer 2
Posted  24 Jun. 2003

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.

Immobilizer II:

The immobilizer will prevent the car from running without a matching key microchip. There is a symbol in the instrument cluster showing a key inside a car. If a new (or different ECU) is installed in the vehicle, the immobilizer will prevent the car from running and will cause the symbol to flash. Here is the procedure to introduce a new ECU to the instrument cluster. This must be performed each time ECU's are exchanged. This does not apply to installing a "chip" in the same ECU that is already aligned with the car.

Immo-3 knows your car's VIN. Access 17-Instruments (or separate 25-Immobilizer on vehicles that are set up that way) and look at the first "Extra" field.

If you see something like: "Immo-ID VWZ7Z0W0648696"  You've got Immo-2 (or maybe even Immo-1 in earlier non-US models).

If you see something like "WVZKB58001H231169 VWZ7Z0W0648696" You've got
Immo-3. The first 17-digit string is the VIN. The second 14-digit string in the Immo-ID.

1. Install the new ECU in the car
   [Select]
   
   [17 - Instruments]
   
   [Adaptation - 10]
   Leave channel at "00"
   
   [Read]
   
   [Save]
    

2. [Done, Go Back]
   
   [Close Controller, Go Back - 06]
   
   [Exit]
    

3. Turn ignition OFF for 15 seconds. Start vehicle.

Note: 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.