Immobilizer 3
Posted  10 May 2002



Immobilizer III:

Some 2001+ Volkswagen/Audi vehicles have Immobilizer III. This works similarly to Immobilizer II, except a secret key code (SKC) is required in order to perform the adaptation routine. The routine changes depending on whether you are using a BRAND NEW ECU that has never been in any other car, or if you are using a USED ECU that has been previously matched to another 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.

NEW:

Before Installing a  BRAND NEW ECU in vehicle, get the ECM coding from the old ECU in the vehicle
VAG-COM
Select Control Module > [Select]
[01 - Engine]
Write down the 5-digit Soft. Coding
[Close Controller, Go Back - 06]
 

[17 - Instruments]
Write down the 14 digit Immobilizer ID number from the "Extra" field
[Close Controller, Go Back - 06]
 

Bring that ID number to your dealer and request your seven-digit SKC
 

Select Control Module > [Select]
[01 - Engine]
[Adaptation - 10]
Enter "50" in Channel Number
[Read]
[Use 7-digit PIN/SKC]
Enter the 7-digit PIN, Date on which the PIN was GENERATED BY THE DEALER, along with the dealer's Workshop Code (WSC) and the Importer number
[OK]
 

VAG-COM will validate the data you have entered and return you to the Adaptation screen, where the New Value will show as "XXXXX".
[Save]
[Done, Go Back]
 

Verify that the VIN now displayed in the "Extra" field matches the VIN on the vehicle code from dealer
[Close Controller, Go Back - 06]
[Go Back]
[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
 

VAG-COM
Select Control Module > [Select]
[01 - Engine]
Verify that the 5-digit Soft. Coding matches the coding from the old ECU 

USED:

Before Installing a  USED ECU in vehicle, get the ECM coding from the old ECU in the vehicle
VAG-COM
Select Control Module > [Select]
[01 - Engine]
Write down the 5-digit Soft. Coding
Write down the 14 digit Immobilizer ID number from the "Extra" field
[Close Controller, Go Back - 06]
 

[17 - Instruments]
Write down the 14 digit Immobilizer ID number from the "Extra" field
[Close Controller, Go Back - 06]
 

Bring both 14-digit ID numbers to your dealer and request both your seven-digit SKC's
 

Select Control Module > [Select]
[01 - Engine]
[Login - 11]
[Use 7-digit PIN/SKC]
Enter the 7-digit PIN, Date on which the PIN was GENERATED BY THE DEALER, along with the dealer's Workshop Code (WSC) and the Importer number
[OK]
[Do-It!]
 

[Adaptation - 10]
Enter 50 in Channel Number
[Use 7-digit PIN/SKC]
Enter the 7-digit PIN, Date on which the PIN was GENERATED BY THE DEALER, along with the dealer's Workshop Code (WSC) and the Importer number
[OK]
[Save]
[Done, Go Back]
 

Verify that the VIN now displayed in the "Extra" field matches the VIN on the vehicle code from dealer
[Close Controller, Go Back - 06]
[Go Back]
[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
 

VAG-COM
Select Control Module > [Select]
[01 - Engine]
Verify that the 5-digit Soft. Coding matches the coding from the old ECU