CITROEN C4 PICASSO Handbook page 136

Driving
Deactivating automatic
operation
In some situations, such as very cold weather
or towing (caravan, recovery), it may be
necessary to deactivate automatic operation of
the system.
F Start the engine.
F Apply the parking brake with the control
lever, if it is released.
F Take your foot off the brake pedal.
F Push and hold the control lever in the
release direction for at least 10 seconds
and no more than 15 seconds.
F Release the control lever.
F Press and hold the brake pedal.
F Pull the control lever in the apply direction
for 2 seconds.
Deactivation of the automatic functions
is confirmed by illumination of this
indicator lamp in the instrument panel.
F Release the control lever and the brake
pedal.
134
From this point the parking brake can only
be applied and released manually using the
control lever.
Repeat this procedure to reactivate automatic
operation.
Reactivation of automatic operation is
confirmed by the indicator lamp in the
instrument panel going off.
Emergency braking
The emergency braking should only be
used in an exceptional situation.
In the event of a failure of the main service
brake or in an exceptional situation (e.g. driver
taken ill, under instruction, etc) a continuous
pull on the control lever will brake the vehicle.
Braking takes place while the control lever is
being pulled. It is interrupted if the control lever
is released.
The ABS and DSC systems provide stability of
the vehicle during emergency braking.
If the emergency braking malfunctions, the
message "Parking brake control faulty" will be
displayed.
If a failure of the ABS and DSC systems
occurs, signalled by the illumination of one
or both warning lamps in the instrument
panel, then stability of the vehicle is no longer
guaranteed.
In this event, stability must be assured by the
driver by repeating alternate "pull-release"
actions on the control lever until the vehicle is
immobilised.