Immobilizer III Immobilizer Swapping (Kessy)

From Ross-Tech Wiki

This procedure details how to change the immobilizer control module on VW/Audi/Seat/Skoda vehicles with Immobilizer III, where the immobilizer control module is integrated with KESSY (Keyless Entry and Start System). See the separate instructions for models where the immobilizer control module is integrated in a separate control module or where the immobilizer control module is integrated in Instrument Cluster.


Determining IMMO-ID & VIN (ECU)

[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]


Determining IMMO-ID & VIN (Kessy)

[Select]
[05 - Acc/Start Auth.]
[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]


Kessy Control Module Swapping

Prerequisites:

  • The NEW module is installed in the car.
  • ORIGINAL Electric Steering Lock is still installed.
  • Battery voltage at least 12.0 V. We strongly recommend the use of a battery charger.
  • Make sure to have BOTH PIN's, from the OLD (ORIGINAL) and the NEW (USED) control module.


  • Put the first Key into the ignition Lock, but do NOT switch ON the ignition.
  • Press and Hold the Brake Pedal for 20 Seconds to wake up the Diagnostic Databus.


[Select]
[05 - Acc/Start Auth.]

[Meas. Blocks - 08]
Select Block 024.
[Go!]
Make sure the shown lock times in field 1, 2, 3 and 4 are 0 (each field represents a time in minutes).

  • If the lock times are NOT 0:
    • Do NOT switch off the ignition!
    • Allow the car to sit for AT LEAST the number of minutes that were indicated by the fields 1-4.

[Done, Go Back]


[Sec. Access - 16]
For the following procedure, use the PIN of the NEW (USED) control module.

  • 4-digit PIN
    • Enter zero followed by the 4-digit PIN. For example, if your PIN is 1234, enter 01234.

[Do it!]


[Adaptation - 10]
Enter 050 in "Channel Number".
[Read]
For the following procedure, use the PIN of the OLD (ORIGINAL) control module.

  • 4-digit PIN
    • Enter zero followed by the 4-digit PIN. For example, if your PIN is 1234, enter 01234.

[Test]
[Save]
[Done, Go Back]

After a successful adaptation a lock time will automatically be set.
[Meas. Blocks - 08]
Select Block 024.
[Go!]
Make sure the shown lock time in field 4 is 0 (a field represents a time in minutes).

  • If the lock time is NOT 0:
    • Do NOT switch off the ignition!
    • Allow the car to sit for AT LEAST the number of minutes that were indicated by field 4.

[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) control module now shows the VIN/IMMO-ID of the vehicle now.


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