How to solve PCMTuner VAG PCR2.1 Car Not Start Problem

Question:

I am working VAG PCR 2.1 ECU on OBD (not in BSL) with pcmtuner. All completely but the car does not start. Any solution?

Solution:

1). If ECU was already unlocked or you did unlock in BSL, it must be a file issue. Contact your file provider. Check for DTC codes to help diagnose your problem.

If you write a file without unlocking in BSL, use ODIS to write original file to ECU. mpps v18 can simply rewrite the original file and the car works again. But if you don’t have original file, the quickest fix is to go with odis. 

How is it possible to write via obd with PCM Tuner if ecu is not unlocked first?

If it’s locked then it still needs to be unlocked in bsl. It still won’t work writing the original file back via obd the car still won’t start the only hope and chance you have now is to get that ecu off get it connected up on the bench in boot mode and hope that it will still allow you to do a BSL unlock on the bench and then if it successfully allows you to unlock it on the bench. Also try and reflash it and read write it whilst it’s still connected up on the bench in boot mode that’s your only hope of recovering this ecu now and getting the car started again.

PCR2.1 ECU must be first unlocked in BSL to use obd.

This ECU requires unlock on BSL mode.  First you have unlock in bdm soldering resistor. Resistor 470ohm, resistor 1Kohm, cfg, boot, supply then unlock

you can also write pcr2.1 by obd on bench with godiag tricore adapter