AdBlue Control Unit Acm2.1 Actros MP4

Typical Defects:
The control unit does not communicate correctly with the diagnostic tool
Warning lights for exhaust gas after-treatment system failure
The engine goes into recovery mode even if the AdBlue level is correct

The control unit Mercedes OE A0004466754 is commonly identified as ACM2.1 (Aftertreatment Control Module), which is the electronic module dedicated to the management of exhaust gas aftertreatment on Euro 6 generation Mercedes industrial vehicles. In practice, it is the control unit that supervises and commands the functions related to SCR/AdBlue and, more generally, to the aftertreatment system (sensors, actuators, and control/diagnostic strategies), working in network with the engine control unit (typically MCM) via CAN communication.

Technical characteristics

• Type: ACM2.1 (Aftertreatment Control Module) for aftertreatment control
• Supplier: Continental / Siemens VDO (frequent commercial nomenclature)
• Vehicle power supply: truck architecture 24 V with monitoring of the control unit power supply voltage
• Network interfaces: communication on CAN (J1939/diagnostics) with data exchange with engine management and other nodes
• Typical inputs/outputs managed by the module: temperature/pressure sensors, NOx sensors, commands and power supplies for SCR/AdBlue system actuators

DIPA can intervene to revise these components thanks to its experience and expertise.

Functionality

• Management and regulation of the SCR/AdBlue system (control strategies and diagnostics of dosing based on engine parameters and sensor feedback)
• Supervision of the main aftertreatment signals (consistency/implausibility of sensors, plausibility of pressures/temperatures, etc.)
• Management of protection logics and degradations (power reduction/limitations) when the SCR system does not operate correctly or when the control unit detects unsuitable electrical conditions
• Network and power diagnostics (interruptions, undervoltages, CAN communication anomalies with other modules)

Model applications

• Mercedes-Benz Actros MP4/MP5

Typical defects

• The control unit does not communicate correctly with the diagnostic tool
• Warning lights for exhaust gas aftertreatment system failure
• The engine goes into recovery mode even if the AdBlue level is correct

Final conclusions

The A0004466754 is attributable to the ACM2.1 aftertreatment management control unit: a key module for the correct functionality of SCR/AdBlue and for emissions diagnostics on Mercedes Euro 6 trucks.

DIPA has a wide range of spare parts dedicated to the Truck world, construction vehicles, and industrial equipment. Not only that: it has refurbished components with performance equal to new, which allows for savings in replacement while contributing to environmental protection through the circular economy. If the spare part you need is not available, don’t worry: DIPA can refurbish your part “on demand,” restoring its full functionality and safety in a short time.