Driving, Function - Mercedes-Benz OM 471 Introduction Into Service Manual

Functions
GF07.16>W>2023H
ENGINES 471.9 in MODEL 963
Shown code (M5Z) Engine version Euro VI
A4 Engine management control unit
(MCM)
B600 Crankshaft position sensor
B601 Camshaft position sensor
B602 Fuel temperature sensor
B606 Exhaust coolant temperature
sensor
B608 Charge air pressure and
temperature sensor in charge air
pipe
B611 Temperature sensor downstream of
air filter (only for code (M5Z)
Engine version Euro VI)
If the drive control (CPC) control unit (A3) does not demand any
idle or working speed control then this is normal driving mode. In
driving mode the injection quantity is primarily adjusted
according to requests from the driver. This means that the torque
specification of the engine is primarily dependent on the position
of the accelerator pedal. It is only in certain situations that it can
happen that the engine speed is adapted independently of the
accelerator pedal position or of the specified torque request, for
example for downshifting for rotational speed comparison
between the main shaft and the countershaft.
In normal driving mode the engine management (MCM) control
unit (A4) therefore first compares the engine specified torque
coming in from the drive control (CPC) control unit (A3), which is
derived from the position of the accelerator pedal and made
available via the drive train CAN (CAN 4), with the current actual
engine torque which represents the real operating conditions of
the engine.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
48

Driving, function

B617 Charge temperature sensor in
charge air housing
B621 Exhaust gas recirculation (AGR)
differential pressure sensor
B622 Rail pressure sensor
B638 Fuel filter module pressure sensor
CAN 4 Drive train CAN
Y608 Cylinder 1 fuel injector
Y609 Cylinder 2 fuel injector
Y610 Cylinder 3 fuel injector
– This printout will not be recorded by the update service. Status: 09 / 2011 –
Y611
Y612
Y613
Y621
Y624
Y625
Y642
If the required engine torque is less than the current actual engine
torque, the engine management (MCM) control unit (A4) reduces
the injection quantity, and if the required engine torque is
greater than the current actual engine torque then it increases
the injection quantity.
i The engine management (MCM) control unit (A4) can limit the
required engine torque sent by the drive control (CPC) control
unit (A3) for engine protection reasons, e.g. if the coolant
temperature exceeds a certain value or the engine has reached its
final or maximum governed rpm, to observe the legally prescribed
maximum speed or to limit it due to a control intervention
function of the ABS (ABS) or the acceleration skid control (ASR).
Limitation of the required engine torque always leads to
limitation of the injection quantity.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
2.8.11
W07.16>1060>79
Cylinder 4 fuel injector
Cylinder 5 fuel injector
Cylinder 6 fuel injector
Exhaust gas recirculation
positioner
Engine brake solenoid valve, stage
1
Engine brake solenoid valve, stage
2
Quantity control valve