Citroen C4: Distraction detection

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

Depending on version, the function consists of either the "Coffee Break Alert" system alone or combined with the "Driver Attention Warning" system.

These systems are in no way designed to keep the driver awake or to prevent the driver from falling asleep at the wheel.

It is the driver's responsibility to stop if feeling tired.

Take a break if you are feeling tired or at least every 2 hours.

These systems reset themselves if one of the following conditions is met:

- The ignition has been switched off for a few minutes.

- The driver's seat belt is unfastened and their door is opened.

• Coffee Break Alert
• Deactivation/Activation

Coffee Break Alert

The system triggers an alert when it detects that the driver has not taken a break after two hours of driving at a speed above 40 mph (65 km/h).

This alert is issued via the display of a message encouraging the driver to take a break, accompanied by an audible signal.

If the driver does not follow this advice, the alert is repeated hourly until the vehicle is stopped.

As soon as the speed of the vehicle drops below 40 mph (65 km/h), the system goes into standby.

Driving time starts being counted again once the speed reaches above 40 mph (65 km/h).

Driver Attention Warning

Depending on version, the Coffee Break Alert system may be combined with the Driver Attention Warning system.

The system assesses the driver's level of alertness, fatigue and distraction by identifying trajectory changes in relation to the lane markings.

To do this, the system uses a camera, placed on the upper part of the windscreen.

This system is particularly suited to fast roads (speed higher than 40 mph (65 km/h) ).

The system may perform a learning procedure for up to 30 minutes after the start of the monitoring.

During this period, the driver's individual driving behaviour is analysed and no alert is given.

At a first alert level, the driver is warned by the message "Caution!", accompanied by an audible signal.

After three first-level alerts, the system triggers a further alert with the message "Driving at risk: Take a break", accompanied by a more pronounced audible signal.

In certain driving conditions (poor road surface or strong winds), the system may give alerts independent of the driver's level of vigilance.

The following situations may interfere with the operation of the system or prevent it from working:

- Lane positioning assist is active.

- poor visibility (e.g. inadequate street lighting, heavy rain, thick fog, snowfall).

- dazzle (e.g. headlamps of an oncoming vehicle, low sun, reflections on a damp road, leaving a tunnel, alternating shade and light).

- windscreen area located in front of the camera (e.g. dirty, misted, frost-covered, snow-covered, damaged or masked by a sticker).

- lane markings absent, worn, hidden (e.g. snow, mud, dead leaves) or multiple (roadworks).

- close to the vehicle ahead (lane markings not detected).

- roads that are narrow, winding.

Risk of undesirable operation

The system should be deactivated in the following situations:

- When a "space-saver" spare wheel is fitted.

- When the vehicle is towed.

- Driving on off-road.

- Driving on racing circuits.

Deactivation/Activation

By default, the function is automatically activated at every engine start.

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.

Deactivation is confirmed by the illumination of this indicator lamp on the instrument panel.

Driver Attention Warning/Safety mode

If the driver's drowsiness is detected, the Lane keeping assist and Active Safety Brake systems are automatically reactivated (if they have been deactivated by the driver in the ADAS touch screen application) and the Collision Risk Alert function trigger threshold is set to its most sensitive value.

It is recommended to deactivate distraction detection in the ADAS touch screen application in the same cases as those for which it is recommended to deactivate the Lane keeping assist and Active Safety Brake systems.

Malfunction

This warning lamp lights up on the instrument panel with the message "Audible Warning System fault: Repair needed" if the audible warning system is in failure.

The system may be disturbed or unavailable.

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

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

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

This warning lamp lights up on the instrument panel with the message "Driving 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 camera is covered by dirt, mud, sand, snow, ice or anything preventing the sensing.

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