Starting and running
OPM 200 en-GB 30
© Scania CV AB 2020, Sweden
Once the fault has been remedied and the engine
control unit has received an indication that it is
working, torque returns to the normal level.
If a new fault occurs within 40 hours of opera-
tion since the first fault, the warning lamp will
come on. After 30 minutes of operation, the
warning lamp will flash rapidly and torque will
be reduced to 0% (low idling) within 30 minutes.
If the torque has been reduced to 0% (low
idling), the control unit does not detect that the
SCR system is functioning again. A service tech-
nician must then reset the system so that the
torque returns to the normal level.
The torque reduction applies only to engines cer-
tified according to Tier 4. Some emergency vehi-
cles do not have torque reduction.
Reaction to faults in the exhaust gas af-
tertreatment system – Stage V
The symbol and behaviour of the warning lamp
depend on the installation of the engine in the
machine. The Scania recommendation will lead
to the behaviour and symbol described here, but
this may differ between different machines.
Once the fault has been remedied and the engine
control unit has received an indication that the
exhaust gas aftertreatment management system
is operating i.e. when the fault code has been ac-
knowledged in SDP3, torque returns to the nor-
mal level.
Warning
lamp
Torque and speed control
Constant
light
None
Flashes
slowly
(½ Hz)
Torque is reduced by 1% per minute
to 75 % of the highest torque.
Flashes rap-
idly (2 Hz)
Torque is reduced by 1% per minute
to 50% of the highest torque. The
engine speed is reduced to 60% of
the nominal engine speed.
319 563
Symbol for faults in the exhaust gas aftertreatment
system.
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