Get Safety -> Active City Brake Guide for Citroen C1 4 Door Second Generation (2014-2022)

Safety

Active City Brake

Active City Brake is a driving assistance system

that aims to avoid a frontal collision or reduce

the speed of an impact if the driver does not

react or reacts too late (brake application too

late).

Principle

Conditions for activation

Active City Brake only operates if the following

conditions are met:

●

the engine is running,

the vehicle is in a forward gear,

to trigger the pre-collision alert:

-

the speed is between 9 and 87 mph

(15 and 140 km/h),

This system is designed to improve

driving safety.

-

the difference in speed between your

vehicle and the one ahead is more than

about 9 mph (15 km/h),

It remains the driver's responsibility to

continuously monitor the state of the

traffic and to assess the distances and

relative speeds of other vehicles.

Active City Brake can in no

●

for braking assistance:

-

the speed is between about 18 and

50 mph (30 and 80 km/h),

the difference in speed between your

vehicle and the one ahead is more than

about 18 mph (30 km/h),

Using a laser sensor and a camera located at

the top of the windscreen, this system detects

a vehicle running in the same direction or

stationary ahead of your vehicle.

When necessary, the vehicle's braking system

is operated automatically to reduce the speed

of impact or to help avoid a collision with the

vehicle ahead.

circumstances replace the need for

vigilance on the part of the driver.

-

for automatic pre-collision braking:

-

Never look at the laser sensor through

an optical instrument (magnifying glass,

microscope...) at a distance of less than

10 centimetres: risk of eye injury.

the speed is between about 6 and

50 mph (10 and 80 km/h),

the difference in speed between your

vehicle and the one ahead is more than

about 6 mph (10 km/h),

-

●

the braking assistance systems (ABS,

EBFD, EBA) are not faulty,

the trajectory control systems (TRC, DSC)

are not deactivated or faulty,

the vehicle is not in a tight corner,

the system has not been triggered during

the previous 10 seconds.

Automatic braking occurs later than if

done by the driver, so as to intervene

only when there is a high risk of

collision.

●

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Safety

Operation

Three levels of operation are possible:

The automatic braking may bring the vehicle to

a complete stop if the situation requires it.

●

Pre-collision alert: if a risk of collision

with a vehicle is detected, a warning lamp

comes on in the instrument panel together

with an audible signal to encourage the

driver to make an avoiding manoeuvre. The

thresholds for triggering the alert can be set.

Braking assistance: increases the

braking started by the driver, only if a risk

of collision is detected.

The triggering of the system may cause

the engine to stall, unless the driver

depresses the clutch pedal quickly

enough during automatic braking.

●

Automatic pre-collision braking: when

your vehicle is too close to or closing

too quickly on the vehicle ahead of you,

the system automatically operates the

brakes to reduce the speed of impact. A

collision can be avoided automatically if the

difference in speed between your vehicle

and the one ahead is not more than 18 mph

(30 km/h).

6

You are then alerted by the display of

this warning lamp, accompanied by

an audible signal.

The brake lamps on your vehicle come on to

warn other road users.

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Safety

Setting the alert thresholds

Deactivation / Reactivation

Press this button for more than 3 seconds.

This indicator lamp comes on in the

instrument panel and the message

"PCS OFF" is displayed.

The alert thresholds determine how you want to be warned of the imminent risk of collision with the

vehicle ahead of you.

You can choose one of three thresholds:

Press the button again to reactivate the system.

A. "Far", to be given early warning (cautious driving).

B. "Normal".

C. "Close", for a later warning (sporty driving).

This indicator lamp comes on in the

instrument panel.

Press this button repeatedly to cycle

through the thresholds.

The default setting is "Normal".

The system is automatically reactivated every

time the engine is started with the key or the

"START/STOP" button.

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Safety

Operating limits

The system only detects vehicles (cars, lorries)

that are stationary or moving in the same

direction as your vehicle.

Unwanted triggering of the system

It is possible for the system to detect a risk of

imminent collision and start working, in the

following conditions in particular:

In difficult weather conditions (very

heavy rain, snow, fog, hail...), braking

distances increase, which can reduce

the ability of the system to avoid a

collision.

It does not detect small vehicles

(bicycles, motorcycles), pedestrians or

animals, nor non-reflective stationary

objects.

-

detection of an object located close to the

edge of the road entering a corner (safety

barrier, lamp post or road sign),

detection of a structure located at the top

or bottom of a steep slope (advertising

hoarding, steet lighting),

The driver must therefore remain

particularly vigilant.

-

detection of reflective objects (central

reservation...) in the road,

detection of the upper bar of a bridge or a

traffic light gantry,

passing a vehicle travelling in the other

direction in a corner,

passing a vehicle traveling in the other

direction, at a crossroads, when your

vehicle is turning left or right,

if the vehicle ahead of you sends up water

or snow,

if your vehicle stops very close to an

overhanging wall or other vehicles,

when your vehicle closes rapidly on the

vehicle ahead,

The system is not triggered or is interrupted if

the driver:

Never leave accumulations of snow or

any object projecting above the bonnet

or in front of the roof: this might fall into

the field of vision of the sensor and

generate a detection.

-

accelerates strongly (even if the speed

limiter is on),

-

or turns the steering wheel suddenly

(avoiding manoeuvre).

6

Detection capability is less effective if:

-

you are driving on roads with pronounced

bends and/or on roads in poor condition,

your vehicle is excessively loaded, as

this changes the horizontal attitude of the

vehicle.

-

your vehicle skids.

-

if the vehicle is raised or lowered,

if the vehicle passes through a plastic

curtain,

-

if driving through mist or smoke,

if the sensor is misaligned (following

replacement after a collision).

113

Safety

Operating faults

Sensor fault

System fault

In the event of a malfunction of

The operation of the laser sensor may suffer

interference from accumulations of dirt or

misting of the windscreen or the presence of

an object causing an obstruction (e.g.: bonnet

open).

the system, you are warned by the

display of this flashing warning lamp

in the instrument panel.

Have the system checked by a CITROËN

dealer or a qualified workshop.

In this case you are warned by the

display of this flashing warning lamp

in the instrument panel.

In the event of an impact to the

windscreen at the sensor, deactivate

the system and contact a CITROËN

dealer or a qualified workshop to have

your windscreen replaced.

Use the windscreen demisting and regularly

clean the area of the windscreen in front of the

sensor.

Do not stick or otherwise fix any object

on the windscreen in front of the sensor.

Never try to remove, adjust or test the

sensor.

Only a CITROËN dealer or a qualified

workshop is able to work on the system.

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Safety -> Active City Brake for Your Citroen C1 4 Door Second Generation (2014-2022)

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