SMART forfour - Warning and Indicator Lamps

Engine
Problem Possible causes/consequences and M Solutions
;
The yellow engine
diagnostics warning
lamp
flashes
while the
engine is running.
The ignition system is malfunctioning. The engine is misfir-
ing, for example, which means the catalytic converter could
become damaged.
X
Visit a qualified specialist workshop immediately.
;
The yellow engine
diagnostics warning
lamp lights up while
the
engine
is running.
The engine power out-
put is also reduced.
The engine is running in emergency mode. This may lead to a
malfunctioning of the fuel injection system, for example.
X
Drive on carefully.
X
Visit a qualified specialist workshop immediately.
;
The yellow engine
diagnostics warning
lamp lights up while
the
engine
is running.
There may be a fault, for example:
R
in the engine management
R
in the exhaust system
R
in the fuel system
R
with the accelerator pedal sensor
X
Visit a qualified specialist workshop immediately.
í
The red battery warn-
ing lamp is lit while
the
engine
is running.
A warning tone also
sounds.
The battery is not being charged.
Possible causes:
R
faulty alternator
R
the battery is faulty
R
torn poly-V-belt
R
a malfunction in the electronics
X
Stop the vehicle immediately, paying attention to road and
traffic conditions, and switch off the engine.
!
Do not continue driving. The engine could otherwise over-
heat.
X
Secure the vehicle against rolling away (Y page 138).
X
Consult a qualified specialist workshop.
196
Warning and indicator lamps in the instrument cluster
>> On-board computer and displays.