Mercedes-Benz OM 471 Introduction Into Service Manual page 54

Code (M5Z) Euro VI engine version shown
A4 Engine management control unit
(MCM)
CAN 4 Drive train CAN
Y608 Cylinder 1 fuel injector
Y609 Cylinder 2 fuel injector
Y610 Cylinder 3 fuel injector
Y611 Cylinder 4 fuel injector
Y612 Cylinder 5 fuel injector
Y613 Cylinder 6 fuel injector
S600 Engine start and engine stop
button
General
The engine's shutdown is initiated, when a corresponding
shutdown message over the drive train CAN
(CAN 4) is pending, e.g. when switching off the engine through
the electronic ignition lock (EIS) (S1), through the battery
disconnect switch (BESO) control unit (A33) or through the
parameterizable special module (PSM) control unit (A22), or
through a corresponding operation of the engine start and
engine stop button (S600).
Central gateway control unit (CGW),
component description
Component description drive control (CPC)
control unit
Component description for engine
management (MCM) control unit
Parameterizable special module (PSM)
control unit component description
i Introduction of engine OM 471 and exhaust aftertreatment > 09/2011 >
– This printout will not be recorded by the update service. Status: 09 / 2011 –
Function
As soon as the engine management (MCM) control unit (A4)
receives a corresponding shutdown request over the drive train
CAN
(CAN 4) or if the engine start and engine stop button (S600) is
operated with the engine running, it interrupts actuation of the
fuel injectors for cylinder 1 to 6 (Y608 to Y613). The fact that no
further injection occurs means that the engine comes to a
standstill and stops.
At engine oil temperatures of less than 70 ∞C the engine brake is
also activated to ensure that the engine can "coast down" when
shutting down. At engine oil temperatures higher than 70 ∞C it
can therefore happen that the engine "vibrates" when shutting
down.
A2
A3
A4
A22
Functions
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