Citroen C4: Parking sensors

For more information, refer to the General recommendations on the use of driving and manoeuvring aids.

This system detects and signals the proximity of obstacles (e.g. pedestrian, vehicle, tree, barrier) using sensors located in the bumper.

• Rear parking sensors
• Front parking sensors

Rear parking sensors

System startup is available when reverse gear is engaged.

It is indicated by an audible confirmation signal and a display indication.

If an obstacle is detected as soon as the reverse gear is engaged, an audible detection signal is given directly instead of the audible confirmation signal.

If no audible signal is given, the display indication is not shown or a warning message appears, the system has a failure.

Audible assistance

The proximity information is given by an intermittent audible signal, the frequency of which increases as the vehicle approaches the obstacle.

When the distance between the vehicle and the obstacle becomes less than about thirty centimetres, the audible signal becomes continuous.

The sound emitted by the speaker (right or left) indicates the side on which the obstacle is located.

The audible signal is automatically suspended when the vehicle is stationary for a few seconds.

The audible signal is automatically restored when the vehicle is moving again or if the obstacle approaches the vehicle.

Adjusting the audible detection signal

(With MyCitroën Drive Plus)

Pressing this button opens the window for adjusting the volume of the audible signal.

Pressing this button mutes/unmutes the audible signal.

A message is displayed to indicate that the audible signal is temporarily muted.

Visual assistance

This supplements the audible signal, without taking account of the vehicle's trajectory, by displaying bars on the screen whose location represents the distance between the obstacle and the vehicle (white: more distant, orange: close, red: very close).

When the obstacle is very close, the "Danger" symbol is displayed on the screen.

Closing the system display window

Pressing this button closes the system display window.

This warning lamp flashes during obstacle detection on the instrument panel.

Muting the audible assistance / Closing the visual assistance

If the audible detection signal is muted or the system display window is closed manually by the driver with the button above during the obstacle detection, only the warning lamp continues to flash on the instrument panel.

Front parking sensors

Supplementing the rear parking sensors, the front parking sensors are triggered when an obstacle is detected in front and the speed of the vehicle is below 6 mph (10 km/h).

Front parking sensor operation is suspended if the vehicle stops for more than three seconds in forward gear, if an obstacle is no longer detected or the vehicle speed exceeds 6 mph (10 km/h).

The sound emitted by the speaker (front or rear) locates the obstacle relative to the vehicle, in front or behind it.

Side parking sensors

Using four additional sensors located on the sides of the bumpers, the system records the position of obstacles during the manoeuvre and indicates them when they are located alongside the vehicle.

Only fixed obstacles are indicated correctly. Moving obstacles detected at the beginning of the manoeuvre may be indicated mistakenly, while moving obstacles that appear alongside the vehicle but were not previously recorded will not be indicated.

Objects memorised during the manoeuvre will no longer be stored after switching off the ignition.

Deactivation/Activation

(Depending on country of sale)

By default, the audible signal is automatically activated at each backing movement of the vehicle.

The system cannot be deactivated.

With Touch screen BLUETOOTH audio system or MyCitroën Play

The settings are changed via the Driving touch screen menu.

With MyCitroën Drive Plus

The settings are changed via the ADAS touch screen application.

If the function is deactivated, this indicator lamp lights up on the instrument panel.

The system status is saved when the ignition is switched off.

The rear parking sensors are deactivated automatically if a trailer or bicycle carrier is connected to a towing device installed in accordance with the Manufacturer's recommendations.

In this case, the outline of a trailer is displayed at the rear of the image of the vehicle.

When starting the vehicle, the graphic and audible aids are only available after the touch screen has started up.

Operating limits

If the boot is heavily loaded, the vehicle may tilt, affecting distance measurements.

In case of a gearbox failure, the system is not active, when the reverse gear is engaged.

Malfunction

In case of display or speakers malfunction (e.g. frozen image, black screen), the system may be disturbed or unavailable.

In the event of vehicle malfunction that requires the vehicle to be stopped, the system may be deactivated.

In the event of a temporary malfunction (e.g. untimely triggering due to external noise sources or other interferences), this warning lamp lights up on the instrument panel, accompanied by the display of a message and an audible signal (short beep).

In the event of a permanent malfunction, this warning lamp lights up on the instrument panel, accompanied by the display of a message and an audible signal (long beep).

Have it checked by a CITROËN dealer or a qualified workshop.

This warning lamp lights up on the instrument panel with the message "Parking Assistance Sensor blind: Clean sensor, see User Manual" if the sensor is masked.

This is a normal behavior, which does not request the support of a qualified workshop.

In this case, stop the vehicle and verify if the front and/or rear sensors are covered by dirt, mud, sand, snow, ice or anything preventing the sensing.

The system is operational again after the detection field has been cleaned.