TagFlash ECU Programmer is tested to read/write PSA Fiat Bosch EDC15C2 3 Plug Bench/Full mode, and checksum by the tool. PS: No need for resistors.
Image 1: how does the TagFlash connect to Bosch EDC15C2 3 Plug Bench mode.
Image 2: TagFlash is reading Bosch EDC15C2 .
Although there is no image provided for the writing process, the TagFlash ECU Programmer is fully capable of writing to Bosch EDC15C2 (3-plug) after reading.