Get Driving -> Active Safety Brake with Collision Risk Alert and Intelligent emergency braking assistance Guide for Citroen C4 SUV Third Generation (2020-2025)

Driving

With Touch screen BLUETOOTH audio

system or MyCitroën Play

The settings are changed via the Driving

touch screen menu.

This system:

– warns the driver that their vehicle is at risk of

collision with the vehicle in front, a pedestrian or,

depending on version, a cyclist.

– reduces the vehicle's speed to avoid a

collision or limit its severity.

With MyCitroën Drive

The settings are changed via the Vehicle

touch screen menu.

With MyCitroën Drive Plus

The settings are changed via the ADAS

touch screen application.

Deactivation of the system is signalled by

the illumination of this warning lamp,

accompanied by the display of a message.

The speed will be reduced by a

maximum of 12 mph (20 km/h) (versions

with camera only) or by a maximum of 31

mph (50 km/h) (versions with camera and

radar).

The vehicle has a multifunction camera located

at the top of the windscreen and, depending on

version, a radar located in the front bumper.

This system does not replace the need

for driver vigilance.

Operating conditions and

limits

This system is designed to assist the driver

and improve road safety.

It is the driver's responsibility to continuously

monitor traﬃc conditions in accordance with

applicable driving regulations.

The system also takes motorcyclists into

account.

Vehicle moving forward without trailer.

Brake system operational.

This system is comprised of three functions:

– Collision Risk Alert.

– Intelligent emergency braking assistance

(iEBA).

– Active Safety Brake (automatic emergency

braking).

Seat belts fastened for all passengers.

Stabilised speed on roads with no or low

curvature.

This warning lamp lights up on the

instrument panel without any additional

message, to indicate that the automatic braking

system is not available.

As soon as the system detects a

potential collision, it prepares the braking

circuit. This may cause a slight noise and a

slight sensation of deceleration.

This is a normal behavior indicating that a

condition is not fulﬁlled and which does not

request the support of a workshop.

In any situations with ignition on where automatic

braking presents a risk, deactivating the system

is recommended, for instance:

Deactivation/Activation

By default, the system is automatically activated

at every engine start.

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Driving

– Towing a trailer (particularly a trailer without its

own braking system).

– Carrying long objects on roof bars.

– Driving with snow chains.

The driver must not overload the vehicle

(keep within the GVW limit and load

height limits for roof bars).

► Select one of the 3 preset thresholds: "Far",

"Medium" or "Near".

Operation

– Using an automatic car wash.

– Performing any maintenance (e.g. changing a

wheel, working inside the engine compartment).

– Placing the vehicle on a rolling bench in a

workshop.

– Towing the vehicle.

– Following a damage of the windscreen close

to the detection camera.

Depending on the collision risk detected by the

system and the alert trigger threshold chosen

by the driver, diﬀerent levels of alert may be

triggered and displayed on the instrument panel.

The system takes into account the vehicle

dynamics, the diﬀerence speed of the own

vehicle and the object identiﬁed for the

collision risk, and the operation of the vehicle

(e.g. actions on the pedals, steering wheel) to

trigger the alert at the most relevant moment.

(orange)

Level 1: visual alert only, warning that the

preceding vehicle is very close.

The message "Vehicle close" is displayed.

(red)

Level 2: visual and audible alert, warning

that a collision is imminent.

The message "Brake!" is displayed.

Level 3: a micro-braking may be given,

conﬁrming the risk of collision (optional).

Collision Risk Alert

This function warns the driver if there is a risk

of collision with the preceding vehicle, or with a

pedestrian or cyclist.

Modifying the alert trigger threshold

The trigger threshold determines the sensitivity

with which the function warns of the risk of

collision.

The selected threshold is memorised when the

ignition is switched oﬀ.

The system is automatically deactivated

when the use of certain types of

"space-saver" spare wheel (smaller diameter)

is detected, or if a fault with the brake pedal

switch or at least two brake lamps is detected.

Following a severe crash (e.g. with airbag

deployment), the system is automatically

deactivated.

With Touch screen BLUETOOTH audio

system or MyCitroën Play

The threshold is set via the Driving touch

screen menu.

► Select one of the three pre-deﬁned

thresholds: "Far", "Normal" or "Close".

Have it checked by a CITROËN dealer or a

qualiﬁed workshop.

With MyCitroën Drive

In case the detection is degraded or

temporarily unavailable by environment

conditions, then a driver indication is not

displayed (because a driver action is not

requested).

The threshold is set via the Vehicle touch

screen menu.

► Select one of the three pre-deﬁned

thresholds: "Far", "Normal" or "Close".

While approaching a vehicle too quickly,

the level 2 alert may be displayed

directly.

Important: the level 1 alert depends on the

trigger threshold selected. It reacts only on

moving vehicles. It is disabled automatically

at lower speed.

With MyCitroën Drive Plus

The threshold is set via the ADAS touch

screen application.

It can be dangerous to drive if the brake

lamps are not in perfect working order.

134

Driving

It is possible that collision warnings are

not given, are given too late or seem

unjustiﬁed.

The driver must always stay in control of the

vehicle and be prepared to react at any time

to avoid an accident.

Operation

The system operates in the following speed

ranges:

Active Safety Brake

– Between 3 mph and 50 mph (5 km/h and

80 km/h) when a stationary vehicle is detected.

– Between 3 mph and 50 mph (5 km/h and

80 km/h) when a pedestrian is detected.

– Between 3 mph and 50 mph (5 km/h and

80 km/h) when a cyclist is detected (versions

with camera and radar only).

– Between 3 mph and 50 mph (5 km/h and

80 km/h) (versions with camera only) or 87 mph

(140 km/h) (versions with cameras and radar)

when a moving vehicle is detected.

If you select "Far" in the touch screen,

then the system warns sooner. This

increases the safety but increases also the

amount of alerts, if the legal safety distance is

not kept.

To reduce the alert occurrence, you can

change the setting to either of the other two.

This warning lamp ﬂashes (for

approximately 10 seconds) as soon as

the function applies the vehicle’s brakes.

During the ﬂashing time, the function is not

available.

With an automatic gearbox or drive selector, in

the event of automatic emergency braking, keep

the brake pedal depressed, also after a complete

stop is reached, to prevent the vehicle from

rolling away.

Intelligent emergency

braking assistance (iEBA)

This function increases vehicle deceleration

if the driver does not brake enough to avoid a

collision.

This function, also called "automatic emergency

braking", intervenes after the acoustic alert if the

driver does not operate the brake pedal quickly

enough.

The system aims at reducing the speed of

impact or avoiding a collision if the driver fails to

react.

This assistance is only provided if the driver

presses the brake pedal.

With a manual gearbox, in the event of automatic

emergency braking bringing the vehicle to a

complete stop, the engine may stall.

The speed will be reduced by a

maximum of 12 mph (20 km/h) (versions

with camera only) or by a maximum of 31

mph (50 km/h) (versions with camera and

radar).

The driver can override the automatic

emergency braking at any time by

strongly turning the steering wheel (evasive

manoeuver) and/or by ﬁrmly pressing the

accelerator pedal.

135

Driving

The brake pedal may feel hard and

vibrate slightly while the function is

operating.

If the vehicle comes to a complete stop,

automatic braking is maintained for 1 to 2

seconds.

warning lamp display for seat belts and front

passenger airbag to indicate that the driver's

and/or front passenger's seat belt is not fastened

(depending on version). The automatic braking

system is deactivated until the seat belts are

fastened.

With Touch screen BLUETOOTH audio

system or MyCitroën Play

The settings are changed via the Driving

touch screen menu.

With MyCitroën Drive

The settings are changed via the Vehicle

touch screen menu.

Distraction detection

Malfunction

This warning lamp lights up on the

instrument panel, if the automatic braking

system is reduced or degraded.

With MyCitroën Drive Plus

For more information, refer to the

General recommendations on the use

of driving and manoeuvring aids.

The settings are changed via the ADAS

touch screen application.

This is a normal behavior, which does not

request the support of a qualiﬁed workshop.

This may be caused by a reduced visibility

(e.g. rain, fog, snow, blinding by low sun) or by

a real sensor blockage. In this case, stop the

vehicle and verify if the front camera or the front

radar is covered by dirt, snow, ice or anything

preventing the sensing.

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.

Coﬀee Break Alert

Depending on version, the function consists of

either the "Coﬀee Break Alert" system alone or

combined with the "Driver Attention Warning"

system.

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

43 mph (70 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.

The system resets itself if one of the following

conditions is met:

– With the engine running, the vehicle has been

stationary for more than 15 minutes.

– The ignition has been switched oﬀ for a few

minutes.

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.

Have it checked by a CITROËN dealer or a

qualiﬁed workshop.

If these warning lamps come on

Activation/Deactivation

By default, the function is automatically activated

at every engine start.

after the engine has been switched

oﬀ and then restarted, contact a CITROËN

dealer or a qualiﬁed workshop to have the

system checked.

– The driver's seat belt is unfastened and their

door is opened.

These warning lamps light up on

the instrument panel and/or in the

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Driving -> Active Safety Brake with Collision Risk Alert and Intelligent emergency braking assistance for Your Citroen C4 SUV Third Generation (2020-2025)

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