Immobilizer 2
Posted  10 May 2002

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.

Install the new ECU in the car
VAG-COM
Select Control Module > [Select]
[17 - Instruments]
[Adaptation - 10]
Enter "channel number" 00 to select channel (it's already there, but delete it and reenter 00)
Enter "new value" 000 (again, it's there, but delete it and reenter it)
[Save]
 

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

Turn ignition OFF and then back on within one minute, but do not start vehicle for two minutes
After 2 minutes, start the vehicle