How to read/write PCR2.1 with Ktag:
Tricore BOOT Simos PCR2.1 adapter
Move the retainer carefully, towards the ECU and ensure that all pins are in their designed position
To read EEPROM and unlock ECI, switch the adapter in BOOT mode
Turn ECU power off before switching the mode
Disconnect power from adapter and connect it to the flash tool
Working with Ktag
Sorry for the bad resolution.