FVDI 2020 (SVCI 2020) or FVDI 2018 full has VAG V21.0/V38.1 software activated with specifial functions. Here we test it on VAG EDC16U31 ECU Immo off together with the Godiag GT100 breakout box.
Follow wiring diagram to connect SVCI, GT100 and ECU
Keep voltage 12v+
Run SVCI software– VAG software- V21.0
Select Engine Control Unit
Identify controol unit infomarion
First read and clear DTC, then reset
Go to Special Functions- Engine Control Unit- EDC16U31 – Read data
Read data succes
press IMMO Off
Turn ignition OFF within 3 sec
Turn on ignition
Turn ignition OFF
Turn on ignition
Immo changed
Turn ignition OFF
Turn on ignition
Immo status has been changed.