MTU 4R 1000 SERIES, Operating Instructions Manual

Page: 47 / 88

Problem
Possible causes/consequences and
M
Solutions
The
·
indicator
lamp lights up.
An emissions-relevant malfunction in the exhaust gas aftertreat-
ment system or in the AdBlue
®
/DEF supply has been detected.
X Top up the AdBlue
®
/DEF tank immediately.
X
If this does not help: have the exhaust gas aftertreatment sys-
tem checked at a qualified specialist workshop. Have the mal-
function rectified immediately. If you do not, engine output may
be reduced and engine speed may be limited.
If there are no malfunctions, the indicator lamp only goes out after
further test routines. The system check may involve several engine
starts, several hours or several journeys without a malfunction.
The
·
indicator
lamp is flashing 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.
Reduced engine output is active. The engine torque is limited to a
maximum of 75% across the whole engine speed range. The limi-
tation will take effect the next time the engine is started.
X
Adapt your driving/operating style.
X
Top up the AdBlue
®
/DEF tank immediately.
X
If this does not help, have the malfunction rectified at a qualified
specialist workshop.
If you do not follow the instructions, an engine speed limitation
may be imposed.
The
·
and indi-
cator lamps are flash-
ing.
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 50%
across the whole engine speed range. The engine speed is limited
to a maximum of 60%. The limitation takes effect by means of a
ramp function.
X
Adapt your driving/operating style.
X
Top up the AdBlue
®
/DEF tank immediately.
X
If this does not help, have the malfunction rectified at a qualified
specialist workshop.
If you do not follow the instructions, an engine speed limitation
may be imposed.
Warning and indicator lamps
45
Operation
Z