About the Delphi DCM generation
- ECU manufacturer
- Delphi
- Supported models
- 7
- Solutions across family
- 12
- Mapped DTC codes
- 3,240
The DCM family covers 7 control units in the Map Decoder database. Each model carries its own map definitions and its own measured DTC data, so coverage is stated per model rather than assumed for the whole generation.
Solutions available across DCM
The list below is the union of what is supported somewhere in this family. Open a model to see exactly which of these apply to it.
AdBlue / SCR Off
Turns off the SCR / AdBlue dosing strategy and its countdown logic in DCM.
Additive (Eolys) Off
Disables the fuel additive (Eolys) system and its level monitoring in DCM.
Catalyst Off
Disables catalyst efficiency monitoring in DCM.
DPF Off
Removes diesel particulate filter regeneration and monitoring logic from DCM files.
EGR Off
Disables exhaust gas recirculation control in DCM calibrations, including the related fault reporting.
Intake Flaps Off
Disables intake flap control and the related diagnostics in DCM.
Lambda / O2
Disables lambda / O2 sensor monitoring in DCM without breaking fuelling.
MAF Off
Removes mass air flow sensor dependency and its diagnostics from DCM.
NOx Off
Disables NOx sensor monitoring and the associated fault paths in DCM.
Speed Limiter (VMAX) Off
Removes the top speed limiter from DCM.
Stage 1
Software-only performance calibration for DCM, with the supporting limiter changes.
Throttle Valve (TVA)
Disables throttle valve actuator control and monitoring in DCM.
Other Delphi ECU families
- CRD2 ECUs
Delphi DCM — frequently asked questions
Which Delphi DCM ECUs does Map Decoder support?
7 models are covered: DCM3.4, DCM3.5, DCM3.7, DCM6.1, DCM6.2, DCM7.1A and DCM7.1B.
What can Map Decoder do on a DCM file?
Across the family the validated operations are AdBlue / SCR Off, Additive (Eolys) Off, Catalyst Off, DPF Off, EGR Off, Intake Flaps Off, Lambda / O2, MAF Off, NOx Off, Speed Limiter (VMAX) Off, Stage 1 and Throttle Valve (TVA). Availability differs per model — the ECU page lists exactly what is supported for that model.
Does Map Decoder correct DCM checksums?
Yes. Checksums for the regions a patch changes are recalculated automatically during patch generation.
How many DTC codes are mapped for DCM?
3,240 distinct diagnostic trouble codes are stored across the family, each with an address and byte values measured on real files.
Tune Delphi DCM files
Map Decoder analyses Delphi DCM files, detects the maps and generates a verified patch with the checksum corrected.