MTU 4R 1000 SERIES, Operating Instructions Manual

Page: 46 / 88

Problem
Possible causes/consequences and
M
Solutions
The and
·
indi-
cator lamps are flash-
ing and
lights up.
You have not rectified an emissions-relevant malfunction that has
been detected in the exhaust gas aftertreatment system or in the
AdBlue
®
/DEF supply.
The reduction in engine output and limitation of the engine torque
are activated. The engine torque is limited to a maximum of 20%
across the whole engine speed range. The engine speed is limited
to idling speed.
X
Adapt your driving/operating style.
X
Have the malfunction rectified immediately at a specialist work-
shop.
The ,
·
and
indicator lamps
are flashing.
You have not rectified an emissions-relevant malfunction that has
been detected in the exhaust gas aftertreatment system or in the
AdBlue
®
/DEF supply.
Reduced engine output is active. The engine torque is limited to a
maximum of 20% across the whole engine speed range. The engine
speed is limited to idling speed.
X
Stop the vehicle/device, paying attention to road and traffic
conditions.
X
Have the malfunction rectified immediately at a specialist work-
shop.
When the AdBlue
®
/DEF tank is filled or the fault is rectified, full engine power will be available
again. If the system check does not detect any other faults, the indicator lamps go out after the
system's status indicator. The system check may involve several engine starts, several hours
or several journeys without a malfunction.
Only vehicles/devices without the AdBlue
®
/DEF reserve warning light
If a malfunction is detected and the listed indicator lamps light up, a warning buzzer sounds for
approximately 5 seconds. In the event of an emergency, operating restrictions (limitation of the
engine torque and engine speed) can be temporarily overridden with the emergency switch
(
Y
page 37).
44
Warning and indicator lamps
Operation