KT200 ECU Programmer is confirmed able to read, write, and do checksum for PSA Peugeot Citroen DCM7.1A DCM7.1B TC297 in boot mode. By following the operation guide below, it will be an easy task.

Open the ECU;

weld the multifunctional cable to the ECU;

connect KT200 to the ECU and the computer;

give power to KT200.

Read and write 100% yes.

Checksum by tool.

KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-01

KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-02 KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-03 KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-04 KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-04 KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-05

Operation guide: step-by-step procedure. 

How to Proceed with the DIRECT BOOT & CNF1 CONNECTION: It’s important to note that one BOOT pin is strategically positioned beneath the microprocessor.
KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-06 KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-06

WARNING: For reaching the BOOT pin placed under the microprocessor, we strongly suggest using and tilting a metal rod support rod with a needle.
KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-07 KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-08 KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-09

When you’re armed with the right tweezers, the task becomes more manageable. All it demands is a keen eye or the aid of a magnifying glass, especially for handling the cnf1 for KT200.

KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-09

For a comprehensive understanding, remember to also focus on the power/gnd/canH/CanL located on the ECU pins.

KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-09
KT200 PSA DCM7.1A DCM7.1B Boot Mode: R/ W/Chck OK-10

Alright, this is the test report and operation guide of using KT200 to read/write/checksum PSA Peugeot Citroen DCM7.1A DCM7.1B TC297 in boot mode, hope it helps.