ECU FAMILY
DCM — phi DCM
Definition
Delphi DCM3.x / DCM6.x / DCM7.x is the Delphi diesel ECU family used primarily on Renault K9K / M9R, Dacia, Nissan Note / Juke 1.5 dCi. CAN-based. Trailing 32-bit sum + per-page CRC.
Why workshops care
Renault dCi tuning targets Delphi DCM6.2 / DCM3.7 on most platforms. Slightly different checksum format from Bosch (simpler — trailing sum).