MTU 4R 1000 SERIES, Operating Instructions Manual

Page: 42 / 88

Problem
Possible causes/consequences and
M
Solutions
The
2
indicator
lamp lights up.
A malfunction was detected in the supply of engine lubricating oil.
The engine oil level is too low.
X
If there are no malfunctions, the indicator lamp goes out after
the engine is started.
X
If the indicator lamp does not go off or lights up when the engine
is running, switch off the engine.
X
Check the engine oil level (
Y
page 32).
X
If this does not help, have the malfunction rectified at a qualified
specialist workshop.
The
+
indicator
lamp lights up.
A malfunction in the coolant circuit has been detected. The coolant
level is too low.
X
If there are no malfunctions, the indicator lamp goes out after
the engine is started.
X
If the indicator lamp does not go off or lights up when the engine
is running, switch off the engine.
X
Check coolant level.
X
If this does not help, have the malfunction rectified at a qualified
specialist workshop.
The
?
indicator
lamp lights up.
A malfunction in the coolant circuit has been detected. The coolant
temperature is too high.
X
If there are no malfunctions, the indicator lamp goes out after
the engine is started.
X
If the indicator lamp does not go off or lights up when the engine
is running, switch off the engine.
X
Check coolant level.
X
If this does not help, have the malfunction rectified at a qualified
specialist workshop.
If you do not observe the instructions, engine performance and
torque may be limited.
The w indicator
lamp lights up.
The indicator lamp shows the status of the continuous brake.
X
The indicator lamp lights up after activation of the continuous
brake.
X
Observe the information contained in the operating instructions
of the device/vehicle.
X
If the indicator lamp does not go out after deactivation or if it
lights up permanently, there is a malfunction.
X
Have the malfunction rectified immediately at a specialist work-
shop.
40
Warning and indicator lamps
Operation