ECU overview
The Delphi DCM7.1B is part of the DCM generation from Delphi. In the Map Decoder database it is linked to Citroen, Peugeot and Toyota vehicles. Coverage for this ECU is built from 109 stored modifications learned on real original and modified files.
What Map Decoder can do on a DCM7.1B file
Every operation below is backed by a stored, verified modification for DCM7.1B. Nothing is listed that the software cannot actually perform on this ECU.
AdBlue / SCR Off
Turns off the SCR / AdBlue dosing strategy and its countdown logic in DCM7.1B.
Additive (Eolys) Off
Disables the fuel additive (Eolys) system and its level monitoring in DCM7.1B.
Catalyst Off
Disables catalyst efficiency monitoring in DCM7.1B.
DPF Off
Removes diesel particulate filter regeneration and monitoring logic from DCM7.1B files.
EGR Off
Disables exhaust gas recirculation control in DCM7.1B calibrations, including the related fault reporting.
Lambda / O2
Disables lambda / O2 sensor monitoring in DCM7.1B without breaking fuelling.
MAF Off
Removes mass air flow sensor dependency and its diagnostics from DCM7.1B.
NOx Off
Disables NOx sensor monitoring and the associated fault paths in DCM7.1B.
Throttle Valve (TVA)
Disables throttle valve actuator control and monitoring in DCM7.1B.
Map detection and patch generation for DCM7.1B
Map detection
Upload an original DCM7.1B read. Map Decoder locates the relevant calibration tables automatically instead of relying on a fixed address list, so files from different software versions are handled.
Patch generation
A stored modification is only offered when it fits your binary. Region similarity and anchor signatures are checked against the uploaded file first, so a change learned on one software version is never blindly written to another.
Checksum correction
Checksums covering the regions a patch touches are recalculated as part of patch generation, so the ECU accepts the modified flash.
DCM7.1B DTC codes
Map Decoder holds 685 diagnostic trouble codes for the DCM7.1B. Each entry stores the address and the byte values measured on a real file.
P0001P0002P0003P0004P0016P0017P0027P003AP0069P0071P0087P0088P008AP008BP0090P0093P0094P0096P0097P0098P00AFP00BAP00BCP00BD
Other DCM ECUs
- Delphi DCM3.43 solutions · 210 DTC
- Delphi DCM3.55 solutions · 224 DTC
- Delphi DCM3.74 solutions · 223 DTC
- Delphi DCM6.12 solutions · 345 DTC
- Delphi DCM6.211 solutions · 943 DTC
- Delphi DCM7.1A10 solutions · 610 DTC
DCM7.1B solutions by vehicle brand
- Peugeot Lambda / O218 ECUs · 485 variants
- Citroen Lambda / O218 ECUs · 465 variants
- Peugeot EGR Off19 ECUs · 443 variants
- Citroen EGR Off19 ECUs · 440 variants
- Peugeot Throttle Valve (TVA)18 ECUs · 430 variants
- Peugeot MAF Off16 ECUs · 429 variants
- Citroen DPF Off16 ECUs · 426 variants
- Peugeot DPF Off16 ECUs · 425 variants
- Citroen MAF Off16 ECUs · 423 variants
- Citroen Throttle Valve (TVA)18 ECUs · 423 variants
- Citroen Additive (Eolys) Off10 ECUs · 339 variants
- Peugeot Additive (Eolys) Off10 ECUs · 329 variants
Other Delphi ECU families
- CRD2 ECUs
Delphi DCM7.1B — frequently asked questions
What is the Delphi DCM7.1B?
The DCM7.1B is an engine control unit produced by Delphi, part of the DCM generation. It is used in Citroen, Opel, Peugeot and Toyota vehicles.
Can Map Decoder identify maps in DCM7.1B files?
Yes. Upload an original read and the relevant calibration tables are located automatically. The result is verified against the binary before any patch is offered, so a mismatched file is rejected rather than silently patched.
Which operations are supported for the Delphi DCM7.1B?
Validated operations for this ECU: AdBlue / SCR Off, Additive (Eolys) Off, Catalyst Off, DPF Off, EGR Off, Lambda / O2, MAF Off, NOx Off and Throttle Valve (TVA). They come from 109 stored modifications learned on real files.
Does Map Decoder support DTC removal on the DCM7.1B?
Yes. 685 diagnostic trouble codes are mapped for this ECU, each with the address and the byte values measured on a real file rather than a guessed constant.
Does Map Decoder correct the checksum after patching a DCM7.1B file?
Yes. Checksums covering the regions a patch changes are recalculated during patch generation, so the modified file is accepted by the ECU.
Work on Delphi DCM7.1B files
Map Decoder analyses Delphi DCM7.1B files, detects the maps and generates a verified patch with the checksum corrected.