Telligent ® Engine System - Mercedes-Benz OM 904 LA Operating Instructions Manual

®
Telligent engine system
The engine has a fully electronic control
system, which, in addition to the engine
and associated sensors, also comprises:
an MR (engine control) unit and
an FR (drive control) unit and/or other
vehicle-specific control units, e.g. ADM
Both are interconnected via a CAN (Con-
troller Area Network) line, on which all the
necessary data/information is ex-
changed.
The engine control monitors itself as well
as the engine. A safety and emergency run-
ning program is selected automatically,
depending on the malfunctions/system
failures that occur ( page 37).
MR (engine control) unit (mounted on
the engine)
The MR (engine control) unit is mounted on
the left-hand side of the engine.
MR (engine control) unit
Before commissioning
General information
The MR (engine control) unit processes
data from the drive control unit or the
ADM, indicating for example the position
of the position sensor (accelerator pedal),
the engine brake* or engine start/stop,
etc.
2
27