Delphi DCM3.4(+) — Delphi DCM diesel ECU — Renault/Dacia/Nissan/Hyundai dCi and CRDi. On this unit the following is available: Stage 1/2 for power, removal from the logic of the diesel particulate filter (DPF), the EGR system, the catalytic converter/lambda, disabling the swirl flaps, Speed Limit Off and DTC Off, rollback to the factory calibration. In the database — 35 modifications on Citroen, Peugeot, DS and 1 more brands. Read/write: Autotuner, MPPS, MagicMotorSport, KT200, FoxFlash.
The Delphi DCM3.4(+) unit is found on 35 different engines. Main brands: Citroen (18), Peugeot (14), DS (2), Fiat (1).
The Delphi DCM3.4(+) ECU supports: STAGE 1, LAMBDA OFF, DPF OFF, STAGE 2, EGR OFF, DTC OFF, VMAX OFF, FLAPS OFF, ECO TUNING, TVA OFF. Checksums are recalculated on the engineer's side in WinOLS5.
The Delphi DCM3.4(+) is supported by: KESS3, Autotuner, KTAG, CMD Flash (Bench for DCM6.2V). On production models OBD reading is usually enough; on locked variants — Bench (BDM/JTAG).
Stage 1 on the diesel Delphi DCM3.4(+) reprograms rail pressure target, SOI/EOI timing, boost target, smoke limiter and torque limiter. The torque gain is noticeable; the HP gain depends on the specific engine.
The original bin/hex/ori is accepted after reading via Autotuner, KESS3 (OBD), KTAG (bench), Trasdata. Checksums are recalculated on the engineer's side.
OBD flashing of the Delphi DCM3.4(+) — 25-30 minutes, Bench (if needed) — about an hour. The file processing itself takes 5-30 minutes after receipt.
The cost of a Delphi DCM3.4(+) file is built in the calculator: you pick the operations you need (Stage 1, emissions removals, service operations) and the price is calculated with the package discount applied.