Immobilizer III ECU Swapping

This procedure details how to change the Engine Control Unit (ECU) on VW/Audi/Seat/Skoda vehicles with Immobilizer III.

Determining VIN & IMMO-ID

Engine Control Unit (ECU)

[Select]
[01 - Engine]
Look at the first "Extra" field. The first 17-digit string is the VIN. The second 14-digit string in the Immo-ID.
[Close Controller, Go Back - 06]

---OR---

[Select]
[01 - Engine]
[Meas. Blocks - 08]
Select Block 081.
[Go!]
The first 17-digit string is the VIN. The second 14-digit string in the Immo-ID..
[Done, Go Back]
[Close Controller, Go Back - 06]

Immobilizer (integrated in Instrument Cluster)

[Select]
[17 - Instruments]
Look at the first "Extra" field. The first 17-digit string is the VIN. The second 14-digit string in the Immo-ID.
[Close Controller, Go Back - 06]

---OR---

[Select]
[17 - Instruments]
[Meas. Blocks - 08]
Select Block 081.
[Go!]
The first 17-digit string is the VIN. The second 14-digit string in the Immo-ID..
[Done, Go Back]
[Close Controller, Go Back - 06]

Immobilizer (integrated in separate Immo Box)

[Select]
[25 - Immobilizer]
Look at the first "Extra" field. The first 17-digit string is the VIN. The second 14-digit string in the Immo-ID.
[Close Controller, Go Back - 06]

---OR---

[Select]
[25 - Immobilizer]
[Meas. Blocks - 08]
Select Block 081.
[Go!]
The first 17-digit string is the VIN. The second 14-digit string in the Immo-ID..
[Done, Go Back]
[Close Controller, Go Back - 06]

Immobilizer (integrated in Kessy)

[Select]
[05 - Start/Access Authorization]
Look at the first "Extra" field. The first 17-digit string is the VIN. The second 14-digit string in the Immo-ID.
[Close Controller, Go Back - 06]

---OR---

[Select]
[05 - Start/Access Authorization]
[Meas. Blocks - 08]
Select Block 081.
[Go!]
The first 17-digit string is the VIN. The second 14-digit string in the Immo-ID..
[Done, Go Back]
[Close Controller, Go Back - 06]

Engine Control Unit (ECU) Swapping (USED ECU)

Prerequisites:

• The NEW (USED) ECU is installed in the car.
• Battery voltage at least 12.5 V.
• All relevant coding and adaptation values have been transferred from the OLD (ORIGINAL) ECU to the NEW (USED) ECU.
• Make sure to have BOTH PIN's, from the OLD (ORIGINAL) and the NEW (USED) ECU.
• Make sure to have the Radio Code (for factory radios only).

[Select]
[01 - Engine]

[Login - 11]
For the following procedure, use the PIN of the NEW (USED) ECU.
There are 2 possibilities how to enter a PIN, choose the one that applies for you.

• 4-digit PIN
  • The PIN needs to be entered as 5-digit number in the New Value box. For example, if your PIN is 1234, enter 01234.
• 7-digit PIN
  • [Use 7-digit PIN/SKC]
  • Enter the 7-digit PIN, Date on which the PIN was generated by the dealer, along with the Workshop Code (WSC) and the Importer number of the dealer that generated the code.
    • This information is NO LONGER GIVEN OUT by dealers and has not been since 2005 as explained here.
  • [OK]
  • VAG-COM will validate the data you have entered and return you to the Login screen, where the Login Code will show as "XXXXX".

[Do it!]

[Adaptation - 10]
Enter 050 in "Channel Number".
[Read]
For the following procedure, use the PIN of the OLD (ORIGINAL) ECU.
There are 2 possibilities how to enter a PIN, choose the one that applies for you.

• 4-digit PIN
  • The PIN needs to be entered as 5-digit number. For example, if your PIN is 1234, enter 01234.
• 7-digit PIN
  • [Use 7-digit PIN/SKC]
  • Enter the 7-digit PIN, Date on which the PIN was generated by the dealer, along with the Workshop Code (WSC) and the Importer number of the dealer that generated the code.
    • This information is NO LONGER GIVEN OUT by dealers and has not been since 2005 as explained here.
  • [OK]
  • VAG-COM will validate the data you have entered and return you to the Login screen, where the Login Code will show as "XXXXX".

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

• Switch OFF the ignition and let the car sit for ~1 minute, then switch ON the ignition again.
• Verify that the NEW (USED) ECU now shows the VIN and if supported IMMO-ID of the vehicle now.
• Verify that the NEW (USED) ECU has the same Coding as the original unit, or code it from scratch using the repair manual or coding chart in VCDS when applicable.
  

---

Engine Control Unit (ECU) Swapping (NEW ECU)

Prerequisites:

• The NEW ECU is already installed in the car.
• Battery voltage at least 12.0 V.
• All relevant coding and adaptation values have been transferred from the OLD (ORIGINAL) ECU to the NEW ECU.
• Make sure to have the PIN of the CAR.

[Select]
[01 - Engine]
[Adaptation - 10]
Enter 050 in "Channel Number".
[Read]
For the following procedure, use the PIN of the CAR.
There are 2 possibilities how to enter a PIN, choose the one that applies for you.

• 4-digit PIN
  • The PIN needs to be entered as 5-digit number. For example, if your PIN is 1234, enter 01234.
• 7-digit PIN
  • [Use 7-digit PIN/SKC]
  • Enter the 7-digit PIN, Date on which the PIN was generated by the dealer, along with the Workshop Code (WSC) and the Importer number of the dealer that generated the code.
    • This information is NO LONGER GIVEN OUT by dealers and has not been since 2005 as explained here.
  • [OK]
  • VAG-COM will validate the data you have entered and return you to the Login screen, where the Login Code will show as "XXXXX".

[Test]
Check the 1st measuring value.
[Save]
[Done, Go Back]
[Close Controller, Go Back - 06]

• Switch OFF the ignition and let the car sit for ~1 minute, then switch ON the ignition again.
• Verify that the NEW ECU now shows the VIN and if supported IMMO-ID of the vehicle now.
• Verify that the NEW ECU has the same Coding as the original unit, or code it from scratch using the repair manual or coding chart in VCDS when applicable.
• Activate Cruise Control if needed on new DBW ECU's

Activating Cruise Control on a new ECU (DBW)

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

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