VAG 1.6 TDI SIEMENS PCR2.1
VAG 1.6 TDI SIEMENS PCR2.1 ECU - BENCH UNLOCK OR OBD
THE Alientech KESSv2 AND CMD FLASH TOOLS CAN DETERMINE IF AN UNLOCK IS REQUIRED FROM AN ID Some early versions may not require an unlock so removal isn't required.
At the end of the ID command (VAG SIMOS PCR2.1 CAN) and (VAG SIMOS 8.2 / 8.3 CAN) the "ECU status" is displayed:
- UNLOCKED -> You do not need to unlock - OBD2 Read and Write OK
- LOCKED -> You have to unlock - ECU Removal
So you can perform the correct procedure for programming the ECU.
MAKE SURE YOU ONLY UNLOCK THE ECU ONCE OR IT WILL FAIL...IF YOU UNLOCK IT TWICE - FLASH THE STOCK FILE ONTO IT THEN UNLOCK AGAIN (ONCE) BEFORE READING AND WRITING.