CITROËN C4 Owner's Manual page 146

TRAJECTORY CONTROL
SYSTEMS
Anti-skid regulation (ASR) and
electronic stability programme
(ESP)
The anti-skid regulation (also known
as Traction Control) optimises trac-
tion to prevent skidding of the wheels,
by acting on the brakes of the driving
wheels and on the engine.
The electronic stability programme
acts on the brake of one or more
wheels and on the engine to keep
the vehicle on the trajectory required
by the driver.
Activation
These systems are activated auto-
matically each time the vehicle is
VIII
started.
They come into operation in the event
of a grip or trajectory problem.
This is indicated by fl ashing
of this warning lamp on the
instrument panel.
116
S A F E T Y
Deactivation
In exceptional conditions (starting a
vehicle which is bogged down, stuck
in snow, on soft ground...), it may be
advisable to deactivate the ASR and
ESP systems, so that the wheels
can move freely and regain grip.
 Press the "ESP OFF" button, lo-
cated in the centre of the dash-
board.
If this warning lamp comes
on in the instrument panel
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and the indicator lamp on the and the indicator lamp on the and the indicator lamp on the and the indicator lamp on the and the indicator lamp on the and the indicator lamp on the and the indicator lamp on the and the indicator lamp on the and the indicator lamp on the
button comes on, this indi- button comes on, this indi- button comes on, this indi- button comes on, this indi- button comes on, this indi- button comes on, this indi- button comes on, this indi-
cates that the ASR and ESP
systems are deactivated.
Reactivation
These systems are reactivated au-
tomatically each time the ignition is
switched back on or from 30 mph
(50 km/h).
 Press the "ESP OFF" button again
to reactivate them manually.
Operating fault
If this warning lamp comes
on, accompanied by an au-
dible signal and a message
on the multifunction screen,
this indicates a malfunction of these
systems.
Have the systems checked by a
CITROËN dealer.
The ESP/ASR systems offer ex-
ceptional safety in normal driving,
but this should not encourage the
driver to take extra risks or drive at
high speed.
The correct functioning of these The correct functioning of these The correct functioning of these The correct functioning of these The correct functioning of these
- - Compiled Compiled Compiled by by by by by C4owners.org C4owners.org C4owners.org
systems depends on observation systems depends on observation systems depends on observation systems depends on observation systems depends on observation
of the manufacturer's recommen-
dations regarding the wheels (tyres
and rims), the braking components,
the electronic components and the
CITROËN assembly and operation
procedures.
After an impact, have these systems
checked by a CITROËN dealer.