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IMMO III/IV authorize ECU for bench flashing (FRF files)

VAG Interface Classic Flashing / Programming Advanced ⏱ 30 min - 2 hours 5 steps

When working on an ECU on the bench without the instrument cluster connected, the ECU cannot be programmed with an FRF file. This function authorises the ECU, as if the cluster were switched on with a working key, making it possible to write the FRF flash file.

Required licences

  • —

Hardware / cables

⚠ WarningThe procedure can take anywhere from 30 minutes to 2 hours.

Procedure

  1. Select the "IMMO III/IV authorize ECU" menu item.
  2. Connect the DSBox and the ECU.
  3. Select the make.
  4. Wait for the connection attempt and then for the process to run.
  5. At the end the ECU is authorised and you can go ahead and write the FRF file.

Reference screenshots

IMMO III/IV authorize ECU for bench flashing (FRF files) — 1IMMO III/IV authorize ECU for bench flashing (FRF files) — 2
Source: Manuale VAG (Offline), cap. 2.5.11.8 (p.97-98) · ⏱ estimated time 30 min - 2 hours
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