How to read, write and back up VW Polo MQB MEC35XX immo data so that you can add key or program all keys lost.
Tools used:
Launch X431 PAD VII (Or Launch X431 IMMO Plus/IMMO Elite)
Procedure:
Go to System and Function->Special Function-> The anti-theft function-> 4th Generation Immobilizer system-> Anti-theft module replacement->MQB instrument
Check wiring diagram
Select processor, here it is Renesas A2C81589700
Launch indicate to use lift pin method. Read and connect MQB cluster with X-prog3 and MCU3 adapter carefully.
Read chip ID
Read Full backup data
Read Flash
Write eeprom.
Save full backup data.
Then Decrypt Flash & EEPROM, upload immo data just saved to get CS code.
Then generate dealer key and learn key with X-prog3.
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