Yes, it’s OBD VR read. Get Identify, and get an Ori, modify Ori and during write tool applies Patch.

For example: VW Caddy 1.6 Somos PCR2.1 unlock by OBD*CAN

Here are PCR 2.1 bench and boot tricore instructions attached as well.

SIEMENS PCR2.1 [ 1796 ] – VW, Audi, Seat, Skoda [Diesel]

Simos PCR2.1 Bench Tricore

Connect the bench box v.2 to the tool and connect the multifunction cable as follows:

To read and write use the following driver:
→ BENCH MODE
→ VW / AUDI / SEAT / SKODA
→ TC1796 – VAG
→ SIMOS PCR2.1

ATTENTION:
In addition to reading/writing the full backup, you can also use this driver to unlock the serial write for the OBD driver “R/W MAPS”:
By loading the EEPROM file, if the software sees that the Eeprom is locked, the following message will be displayed:
Set unlock EEPROM for serial maps programming?
Choosing OK will apply the unlock on the EEPROM and you can also write the ECU in OBD using the serial driver R/W MAPS.

We also remind you that you can also read and write PCR2.1 via OBD using the driver:
SIMOS PCR 2.1 UNLOCK BY OBD *CAN
This driver reads the file with virtual read and unlocks the control unit directly while writing by applying a patch on the micro file during writing.

SIEMENS SIMOS PCR2.1 [ TC1796 INT.F.] – VW, Audi, Seat, Skoda

KT200 Simos PCR2.1 Unlock Boot Tricore

We also remind you that you can also read and write PCR2.1 via OBD using the driver:
SIMOS PCR 2.1 ONLOCK BY OBD *CAN
This driver reads the file with virtual read and unlocks the control unit directly while writing by applying a patch on the micro file during writing.

Kit to use:
– Multifunction cable
– 2 resistances of 560 Ω
– 1 resistance of 1000 Ω

Step 1: Password Search 

Connect the pinout below with multifunction cable.
Use the driver:
→ TOOLS BOOT MODE
→ INFINEON TRICORE Tool Password
→ PASSWORD SIMOS PCR2.1
→ Click on “Find Password” and follow the software messages.

Now that the password has been found it’s possible to read and write the control unit. See next step.

Step 2: Read and Write ECU

Connect with the multifunction cable the following pinout and the boot shown below.
Use the driver:
→ TOOLS BOOT MODE
→ INFINEON TRICORE Boot
→ SAK TC1796