Get Driving -> Active cruise control Guide for Citroen C4 Grand Picasso SUV Second Generation (2013-2022)

Driving

Active cruise control

This systems allows, in addition to maintaining

your vehicle's speed at a value that you

have defined, the inter-vehicle time you have

selected between your vehicle the the one

ahead to be maintained (2 seconds by default,

on activating the function).

Principles of operation

Using a radar with a range of about 100 metres,

located at the front of the vehicle, this system

detects a vehicle running in front of your

vehicle.

The active cruise control operates by

day and at night, in fog or in moderate

rainfall.

It automatically adapts the speed of the vehicle

to that of the vehicle in front.

If the vehicle in front is running more slowly,

the system progressively reduces the speed of

your vehicle using just engine braking (as if the

driver had pressed the "

-

" button).

If your vehicle is too close to or approaching too

quickly the vehicle in front, the cruise control

is automatically deactivated. The driver is then

alerted by an audible signal, accompanied by a

message.

If the vehicle in front accelerates or changes

lane, the active cruise control progressively

accelerates your vehicle to return to the

programmed speed.

The activation of this system

deactivates the function of inter-vehicle

time.

The system does not act on the braking

system, but works only with engine

braking.

The regulation range is limited: there will

no longer be any adjustment of speed if the

difference between the programmed speed

setting and the speed of the vehicle in front

becomes too high (18 mph (30 km/h).

If the difference between the

programmed speed setting and the

speed of the vehicle in front is too

great, the speed cannot be adjusted:

the cruise control is automatically

deactivated.

If the driver operates a direction indicator to

the left (left hand drive) or the right (right hand

drive), to overtake a slower vehicle, the active

cruise control allows your vehicle to temporarily

approach the vehicle in front to assist the

overtaking manoeuvre, though never exceeding

the programmed speed.

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Driving

General points

The active cruise control is switched on

manually: it requires that the speed of the vehicle

be between 25 mph (40 km/h) and 90 mph

(150 km/h), as well as the engagement of:

The active cruise control can above be paused

manually with the control, or automatically:

The active cruise control cannot in any

circumstances replace the observation

of speed limits, nor the the vigilance

and responsibility of the driver.

It is recommended that you always keep

your feet close to the pedals.

-

by pressing the brake or clutch pedal,

in the event of operation of the DSC, for

safety reasons,

-

at least fourth gear with a manual gearbox,

second gear with an electronic or automatic

gearbox in manual mode,

-

in the event of an action of the electric

parking brake control,

-

position A with an electronic gearbox or D

with an automatic gearbox.

when an inter-vehicle time threshold is

reached (calculated according to the

relative speeds of your vehicle and the

vehicle in front and the inter-vehicle time

setting chosen),

4

-

when the distance between your vehicle

and the one in front becomes to small,

when the speed of the vehicle in front is to

low,

when the speed of your vehicle becomes

too low.

If the speed setting selected is above

93 mph (150 km/h), the system switches

to normal cruise control operation

(a message appears in the instrument

panel).

Switching off the ignition cancels any

programmed value, and the inter-

vehicle time is reset to 2 seconds.

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Driving

Steering mounted controls

Operation

Switching on

ꢀ

Turn the wheel 1 to the "CRUISE" position:

cruise control mode is selected, but not

started (Pause).

ꢀ

Press one of the buttons 2 or 3: the current

speed of your vehicle becomes the cruise

speed setting (set on the fly).

The cruise control is activated (ON).

The inter-vehicle time is set at 2 seconds.

Modiﬁcation of the cruise control

speed and/or the inter-vehicle

time

Button 5 (MEM)

Press button 5, the six memorised speeds and

the inter-vehicle time setting are displayed in

the touch screen tablet.

The controls for this system are grouped

together on the steering wheel.

Modiﬁcation of the cruise control

speed only

1. Cruise control mode selection wheel.

2. Button for reducing the cruise value setting

or for setting the cruise value on the fly.

3. Button for increasing the cruise value

setting or for setting the cruise value on the

fly.

Buttons 2 and 3

ꢀ

By successive short presses, to modify by

steps of + or - 1 mph (km/h),

ꢀ

by a maintained press, to modify in steps

of + or - 5 mph (km/h).

ꢀ

Choose a speed setting: it is displayed in

the instrument panel,

ꢀ

press or the "

+

" or "

-

" button to choose

a new inter-vehicle time setting between

2.5 seconds and 1 second.

4. Button for pausing / resuming the cruise

control.

5. Button for displaying the list of memorised

speeds and for adjusting the inter-vehicle

time.

As a precaution, it is recommended that you

select a speed setting close to the current

speed of your vehicle.

The selection screen closes after a few

moments. The modifications are then accepted.

For more information on the list of memorised

speeds, refer to "Memorising speeds".

If the active cruise control has not been

switched on, pressing this button has

no effect.

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Driving

Displays in the instrument panel

Exceeding the programmed

speed

It is possible to exceed the programmed speed

temporarily by depressing the accelerator

pedal. Simply release the accelerator pedal to

return to the programmed speed.

If the programmed speed is unintentionally

exceeded, descending a steep hill for example,

the speed setting in the instrument panel

flashes as a warning.

In the event of the presence of a

vehicle detected by the radar, if the

speed selected is much higher than

the speed of that vehicle, the system

is not activated and the alert message

"Activation not possible, conditions

unsuitable" is displayed until driving

conditions are safe to allow activation of

the system.

4

The information is grouped together in the

instrument panel.

6. Indication of cruise control pause/resume.

7. Indication of selection of cruise control

mode, or

vehicle speed adjustment phase.

8. Cruise speed setting, or

adjusted speed lower than the cruise

setting.

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Driving

Driving situations and associated alerts

The table below describes the alerts and the messages displayed for the different driving situations.

The display of these alerts is not sequential.

Display in the

instrument panel

Symbol

Associated message Comments

No vehicle detected:

the system operates as a conventional cruise control.

Detection of a vehicle, at the limit of the range of the radar:

the system operates as a conventional cruise control.

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Driving

Display in the

instrument panel

Symbol

Associated message Comments

"SPEED ADJUSTED" Detection of a vehicle that is too close or running at a speed lower than your

vehicle's cruise speed setting.

The system uses engine braking to slow your vehicle and then hold it at the speed of

the vehicle in front so as to maintain the programmed inter-vehicle time.

The regulation range is limited to a maximum difference of 20 mph (30 km/h)

between the speed setting and the speed of the vehicle ahead.

4

"Cruise control

paused".

If the system exceeds the limit of speed adjustment possible by the system and in

the absence of any reaction by the driver (operation of the direction indicator, change

of lane, reduction of the speed of the vehicle), the system is automatically paused.

The display of the deactivation message is accompanied by an audible signal.

not possible, conditions unsuitable" is displayed while reactivation is not possible.

When the conditions allow, it is recommended that the function be reactivated by pressing button 2 or 3, which will make the current speed of

your vehicle the new cruise speed setting, rather than by pressing button 4 (on/pause) which reactivates the cruise control using the old cruise

speed setting, which may be very different from the current speed of your vehicle.

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Driving

Limits of operation

The active cruise control uses only engine

braking to slow the vehicle. Consequently the

vehicle looses speed slowly, as when releasing

the accelerator pedal.

As the radar's field of view is quite narrow, it is

possible that the system may not detect:

The system is paused automatically:

-

if the vehicle in front slows down to much

or too suddenly, and the driver does not

brake,

-

vehicles entering a corner,

vehicles changing lane at the last moment.

-

if a vehicle comes between your vehicle

and the vehicle in front,

if the system does not slow the vehicle

enough to continue to maintain a safe

distance, for example when descending a

steep hill.

-

vehicles of reduced width, such as

motorcycles, for example,

The cruise control does not take account of:

-

stationary vehicles,

vehicles driving in the opposite direction.

The regulation range is limited to a maximum

difference of 20 mph (30 km/h) between the

speed setting and the speed of the vehicle

ahead. Above this, the system goes into pause

if a safe distance is not maintained.

-

vehicles not running in the middle of the

lane,

Severe weather conditions (very heavy

rain, accumulations of snow in front

of the radar) can interfere with the

operation of the system, resulting in

the display of the message "SYSTEM

INACTIVE: Visibility reduced". The

function remains unavailable until the

message disappears.

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Driving

Operating fault

In the event of a fault with the active cruise

control, you are alerted by an audible signal

and display of the message message "Driving

aid functions fault".

Have the system checked by a CITROËN

dealer or a qualified workshop.

When the cruise control is working, take

care if making a maintained press on

one of the cruise control programmed

speed modification buttons: this can

lead to a very quick change in the

speed of your vehicle.

Do not use the active cruise control on

slippery surfaces or in heavy traffic.

When descending a steep hill, the

cruise control may not be able to

prevent the vehicle from exceeding the

programmed speed.

The operation of the radar, located in

the front bumper, may be disturbed by

accumulations of grime (dust, mud...)

or in certain weather conditions (snow,

ice...).

The message "SYSTEM INACTIVE:

Visibility reduced" is displayed to signal

that the system has been put into

standby.

4

Clean the front bumper regularly.

When ascending a steep hill or when

towing, it might not be possible to attain

or maintain the programmed speed.

The use of mats not approved by

CITROËN may interfere with the

operation of the cruise control.

To avoid any risk of jamming the pedals:

-

ensure that mats are positioned

correctly,

never fit one mat on top of another.

181

Driving -> Active cruise control for Your Citroen C4 Grand Picasso SUV Second Generation (2013-2022)

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