Working Speed Control, Function; General Information; Regulation Of The Working Speed - Mercedes-Benz OM 471 Introduction Into Service Manual

Functions
GF07.16>W>2022H
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

General information

The electronic working speed control takes place as soon as a
power take>off is switched in. To do this up to three power take>
offs can be parameterized differently according to the vehicle
equipment. This means that for every power take>off difference
control specifications can be established according to the area of
use of the vehicle and according to how the parameters for the
power take>off functions are set in the SCA (SCA) control unit (A7)
or in the parameterizable special module (PSM) control unit (A22).
Along with a range of other parameters it is possible, for example,
to set the entry requirements such as "parking brake tightened"
or "transmission in neutral", or the engine speed range (min.
engine speed, max. engine speed) as well as a torque limitation.
It is furthermore possible to set the working speed during
operation of a power take>off over the accelerator pedal or the
keys on the multifunction steering wheel individually to a
rotational speed between 550 rpm and 750 rpm or to raise it over
the idle speed switch (S900) to a parameterizable value.
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46

Working speed control, function

B611 Temperature sensor downstream
of air filter (only for code (M5Z)
Engine version Euro VI)
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
– This printout will not be recorded by the update service. Status: 09 / 2011 –
CAN 4
Y608
Y609
Y610
Y611
Y612
Y613
Y621
Y642

Regulation of the working speed

Upon switching on of a power take>off its parameters for working
speed control are transmitted by the SCA (SCA) control unit (A7)
and the parameterizable special module (PSM) control unit (A22)
via the CAN data bus system to the drive control (CPC) control unit
(A3).
The drive control (CPC) control unit (A3) passes on the parameter
via the drive train CAN (CAN 4) to the engine management (MCM)
control unit (A4) whereby it initially takes account of the
parameters set in the parameterizable special module (PSM)
control unit (A22) since these are super>imposed over the
parameters set in the SCA (SCA) control unit (A7).
This means: for vehicles with code (E3Y) PSM, body and trailer
CAN ISO 11992 and for vehicles with code (E3Z) PSM, body CAN
ISO 11898 instead of 11992 only the parameters in the
parameterizable special module (PSM) control unit (A22) are
taken into account, independently of which parameters are set in
the SCA (SCA) control unit (A7).
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2.8.11
W07.16>1059>79
Drive train CAN
Cylinder 1 fuel injector
Cylinder 2 fuel injector
Cylinder 3 fuel injector
Cylinder 4 fuel injector
Cylinder 5 fuel injector
Cylinder 6 fuel injector
Exhaust gas recirculation
positioner
Quantity control valve