engine CITROEN C4 2023 Workshop Manual

102
Driving
M.Driving in manual mode
Press this button to switch to manual mode.
The driver changes gear using the steering-
mounted controls.
►

In mode
N, with your foot on the brake pedal,
push without passing the point of resistance: •

Forwards, mode
R is selected.
•

Backwards, mode D

is selected.
Release the selector fully after each push; it
will then return to its initial position.
Special cases
To avoid mode N (quick change from D to R and
back again):
►

In mode
R, push backwards past the point of
resistance, mode D is selected.
►

In mode
D, push forwards past the point of
resistance,
mode R is selected.
►

T
o return to mode N, push without passing
the point of resistance.
Steering-mounted controls
(Depending on equipment)
In mode M or D, the steering-mounted control
paddles can be used to change gear manually.
They cannot be used to select neutral or to
engage or disengage reverse gear.


► Pull the " +" or "-" paddle towards you and
release to shift up or down a gear, respectively.
Information displayed on
the instrument panel
When the ignition is switched on, the gearbox
status is displayed on the instrument panel:
P Parking
R Reverse
N Neutral
D1...8 Automatic forward gear
M1...8 Manual forward gear
The state of the gearbox remains displayed on
the instrument panel for a few seconds after
switching off the ignition.
Operation
Only appropriate mode change instructions are
validated.
With the engine running, if it is necessary to
depress the brake pedal to change modes,
an alert message will be displayed on the
instrument panel.
With the engine running and the brakes
released, if R, D or M is selected, the
vehicle moves off, even without pressing the
accelerator pedal.
Never depress the accelerator and brake
pedals at the same time - risk of damage to
the gearbox!
If you open the driver's door while mode
N is engaged, an audible signal will
sound. The audible signal stops when the
driver's door is closed.
At very low speeds, opening the driver's door triggers the gearbox to switch to
mode P.
In the event of battery failure, it is
essential to place the chock(s) supplied
with the tool kit against one of the wheels to
immobilise the vehicle.
Special aspects of automatic mode
The gearbox selects the gear that provides
optimal performance based on ambient
temperature, road profile, vehicle loading and
driving style.
For maximum acceleration, press the accelerator
fully down (kick-down). The gearbox changes
down automatically or holds the selected gear
until the maximum engine speed is reached.

103
Driving
6Steering mounted controls allow the driver to
temporarily select a gear, if the vehicle speed
and engine speed conditions permit.
Special aspects of manual mode
The gearbox only changes from one gear to
another if the vehicle speed and engine speed
conditions permit.
Starting the vehicle
► Fully depress the brake pedal.
► Start the engine.
►

With your foot on the brake pedal, push once
or twice backwards to select automatic mode D

,
or forwards to shift into reverse gear R.
►

Release the brake pedal.
►


Accelerate gradually to automatically release
the electric parking brake.
The vehicle moves off immediately

.
Automatic gearbox
Never try to start the engine by pushing
the vehicle.
Switching the vehicle off
Regardless of the current gearbox mode, mode
P is immediately engaged automatically when
the ignition is switched off.
However, in mode N, mode P will be engaged
after a delay of 5
seconds (time to enable free-
wheeling mode). Check that mode
P has been engaged and
that the electric parking brake was applied
automatically; if not, apply it manually.
The corresponding indicator lamps on the gear selector and the electric parking
brake control must be on, as well as the indicator
lamps on the instrument panel.
Gearbox malfunction
This warning lamp comes on, accompanied by an audible signal and
the display of a message.
Visit a CITROËN dealer or a qualified workshop.
Do not drive faster than 62
mph (100 km/h),
keeping to the speed limit.
Switching of the gearbox to back-up mode
Mode D locks in third gear.
The paddles on the steering wheel do not work
and mode M is no longer accessible.
You may feel a significant jolt on engaging
reverse gear. This will not damage the gearbox.
Selector malfunction
Minor malfunction
This warning lamp comes on, accompanied by the display of a message
and an audible signal.
Drive carefully.
Visit a CITROËN dealer or a qualified workshop.
In some cases, the selector indicator lamps may
no longer come on, but the gearbox state is still
displayed on the instrument panel.
Major malfunction
This warning lamp comes on, accompanied by the display of a
message.
You must stop the vehicle.
Stop as soon as it is safe to do so and
switch off the ignition.
Contact a CITROËN dealer or a qualified
workshop.
Drive selector (Electric)

The drive selector is a pulse selector with a
regenerative braking function.
The drive selector provides traction control
based on the driving style, the road profile and
the vehicle load.
With regenerative braking activated, it also
manages engine braking when the accelerator
pedal is released.

104
Driving
P.Park
Button for parking the vehicle: the front
wheels are locked (the button lights up to
indicate that it is activated).
R. Reverse
To engage reverse gear, with your foot on the
brake pedal.
N. Neutral
To move the vehicle with the ignition off and
so allow it to free-wheel.
For more information on Free-wheeling, refer
to the corresponding section.
D. Drive (automatic forward gear)
B. Brake (regenerative braking)
Button for changing to Drive/automatic
forward gear
mode with regenerative braking
function (the button lights up to indicate that it
is activated).
Information displayed on
the instrument panel
When the ignition is switched on, the drive
selector status is displayed on the instrument
panel:
P : Park.
R : Reverse.
N : Neutral.
D : Drive (automatic forward gear).
B : Brake (automatic forward gear with
regenerative braking function activated).
Operation
► In mode N, with your foot on the brake pedal,
push without passing the point of resistance: •

Forwards, mode
R is selected.
•

Backwards, mode D

is selected.
Release the selector fully after each push; it
will then return to its initial position.
Special cases
To avoid mode N (quick change from D to R and
back again):
►

In mode
R, push backwards past the point of
resistance, mode D is selected.
►

In mode
D, push forwards past the point of
resistance,
mode R is selected.
►

T
o return to mode N, push without passing
the point of resistance.
Regenerative braking
With the Brake function and when
decelerating
The Brake function emulates engine braking,
slowing the vehicle with no need to depress the
brake pedal. The vehicle slows more quickly
when the driver releases the accelerator pedal.
The energy recovered when the accelerator
pedal is released is then used to partially
recharge the traction battery, thereby increasing
the vehicle's driving range.
The resulting deceleration of the vehicle does not cause the brake lamps to come
on.
► From mode D, press button B to activate/
deactivate the function (the button lights up when
the function is activated).
B is displayed on the instrument panel.
The system status is not saved when the ignition
is switched off.
In some situations (e.g. battery full,
extreme temperatures), the amount of
regenerative braking may be temporarily
limited, resulting in less deceleration.
The driver must remain alert to traffic
conditions and must always be ready to use
the brake pedal.
With the brake pedal
When the brake pedal is depressed, the
intelligent braking system automatically recovers
some of the energy and uses it to recharge the
traction battery.
This energy recovery also reduces use of the
brake pads, thereby limiting their wear.
The driver may experience a different sensation when depressing the brake
pedal compared to a vehicle without
regenerative braking.
Driving modes
The driving modes available depend on the engine and equipment of the vehicle.

105
Driving
6Driving modes are selected using the following
control:




► Press the control to display the modes on the
instrument panel.
When the message disappears, the selected
mode is activated and remains indicated on the
instrument panel (except Normal
mode).
Whenever the ignition is switched on,
Normal
driving mode is selected by default.
Normal
To restore the default settings.
Eco
To reduce energy consumption by reducing the
performance of the heating and air conditioning,
without deactivating them.
Free-wheeling in Eco mode: depending on
version, with the EAT8 gearbox, switching
into "free-wheeling" is encouraged to slow the
vehicle down without using engine braking. You
can save fuel by taking your foot gradually and
fully off the accelerator pedal in anticipation of
slowing down.
To reduce consumption of the traction battery's
electrical energy by limiting engine torque.
Sport
To obtain more dynamic driving with action
on the accelerator and gear changes with an
automatic gearbox.
Hill start assist
This system keeps the vehicle briefly stationary
(for approximately 2 seconds) when making a hill
start, while you transfer your foot from the brake
pedal to the accelerator pedal.
The system is only active when:
–

The vehicle is completely stationary
, with your
foot on the brake pedal.
–

Certain slope conditions are met.
–


The driver
’s door is closed.
Do not leave the vehicle while it is being
held temporarily by hill start assist.
If someone needs to get out of the vehicle
with the engine running, apply the parking
brake manually. Then check that the parking
brake indicator lamp and the P indicator lamp
in the electric parking brake control are on
fixed.
The hill start assist function cannot be deactivated. However, using the parking
brake to immobilise the vehicle interrupts its
operation.
Operation

Facing uphill, with the vehicle stationary,
the vehicle is held for a short time when the
driver releases the brake pedal:
–

If first gear or neutral is engaged on a manual
gearbox.
–


If mode
D or M is selected on an automatic
gearbox.
–

If mode
D or B is selected on the drive
selector.


Facing downhill, with the vehicle stationary
and reverse gear engaged, the vehicle is held
for a short time when the driver releases the
brake pedal.

106
Driving
Malfunction
If the event of a malfunction, these
warning lamps light up on the
instrument panel, accompanied by the display of
a message.
Have it checked by a CITROËN dealer or a
qualified workshop.
Gear shift indicator
(Depending on engine)
This system is designed to reduce fuel
consumption by recommending the most suitable
gear.
Operation
Depending on the driving situation and
the vehicle's equipment, the system may
recommend skipping one or more gears.
Gear engagement recommendations are
not to be considered mandatory. Indeed, the
configuration of the road, the traffic density and
safety remain determining factors when choosing
the best gear. Therefore, the driver remains
responsible for deciding whether or not to follow
the system’s advice.
The system cannot be deactivated.
With an automatic gearbox, the system is
only active in manual operation.
The information appears on the instrument panel, in the form of an arrow
and the recommended gear.
The system adapts the gear change instructions according to the driving
conditions (e.g.
slope, load) and driving style
(e.g.
power demand, acceleration, braking).
The system never suggests:
–

engaging first gear;
–


engaging reverse gear
.
Stop & Start
The Stop & Start function puts the engine temporarily into standby - STOP mode - during
phases when the vehicle is stationary (e.g.
red
lights, traffic jams). The engine automatically
restarts - START mode - as soon as the driver
indicates the intention of moving off again.
Primarily designed for urban use, the function
is intended to reduce fuel consumption and
exhaust emissions as well as the noise level
when stationary.
The function does not affect the functionalities of
the vehicle, in particular the braking.
Deactivation/Reactivation
By default, the function is activated when the
ignition is switched on.
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.
With MyCitroën Drive Plus
The settings are changed via the ADAS
touch screen application or via the
Shortcuts for driving aids .
The display of a message on the instrument
panel confirms the change of state.
If the function is deactivated while the engine is
in STOP mode, it will restart immediately.
Associated indicator lamps
Function activated: engine on standby
(STOP mode)
Function deactivated or malfunction
Opening the bonnet
Before doing anything under the bonnet,
deactivate the Stop & Start system to avoid
any risk of injury caused by the engine
restarting automatically.

107
Driving
6Driving on flooded roads
Before entering into a flooded area, it is
strongly recommended that you deactivate
the Stop & Start system.
For more information on Driving
recommendations, particularly on flooded
roads, refer to the corresponding section.
Operation
Main conditions for operation
– The driver ’s door must be closed.
– The driver's seat belt must be fastened.
–

The level of charge in the battery must be
sufficient.
–


The temperature of the engine must be within
its nominal operating range.
–


The outside temperature must be between
0°C and 35°C.
Putting the engine into standby
(STOP mode)
The engine automatically enters standby mode
as soon as the driver indicates their intention to
stop:
–

W
ith a manual gearbox: with the gear lever
in neutral and the clutch pedal released.
–

W
ith an automatic gearbox: with the gear
selector in mode D or M, the brake pedal
depressed until the vehicle stops or the gear
selector in mode N, with the vehicle stationary.
Time counter
A time counter adds up the time spent in standby
during the journey. It is reset to zero every time
the ignition is switched on.
Special cases:
The engine will not go into standby if the
conditions for operation are not met and in the
following cases:
–

Steep slope (ascending or descending).
–


V
ehicle has not exceeded 6 mph (10 km/h)
since the last engine start (with the key or the
START/STOP button).
–

Needed
to maintain a comfortable temperature
in the passenger compartment.
–

Demisting active.
In these cases, this indicator lamp flashes
for a few seconds, then goes off.
After the engine has restarted, STOP mode is not available until the vehicle
has reached a speed of 5 mph (8
km/h).
During parking manoeuvres, STOP mode
is not available for a few seconds after
coming out of reverse gear or turning the
steering wheel.
Restarting the engine (START mode)
The engine automatically restarts as soon as the
driver indicates the intention of moving off again: With a manual gearbox: with the clutch pedal
fully depressed.
With an automatic gearbox:
–

With the selector in mode
D or M: with the
brake pedal released.
–
With the selector in mode
N and the brake
pedal released: with the selector at D or M.
–
With the selector in mode
P and the brake
pedal depressed: with the selector at R, N, D
or M.
–
With reverse gear engaged.
Special cases
The engine will restart automatically if the
conditions for operation are met again and in the
following cases:
–

With a manual gearbox: vehicle speed
exceeds 2.5 mph (4

km/h).
–

With an automatic gearbox, in mode N

, vehicle
speed exceeds 0.6 mph (1
km/h).
In these cases, this indicator lamp flashes
for a few seconds, then goes off.
Malfunctions
In the event of a fault with the system, this
warning lamp flashes for a few moments
on the instrument panel, then remains on,
accompanied by the display of a message.
Have it checked by a CITROËN dealer or a
qualified workshop.

108
Driving
The vehicle stalls in STOP mode
All of the instrument panel warning lamps come
on if there is a fault.
►
Switch off the ignition then start the engine
again with the key or the " ST

ART/STOP" button.
12 V battery
The Stop & Start system requires a
12 V battery of specific technology and
specification.
All work must be carried out only by a
CITROËN dealer or a qualified workshop
Tyre under-inflation detection
This system alerts the driver if one or more tyres
suffer a drop in pressure.
The alert is raised when the vehicle is moving,
not when stationary.
It compares the information given by the wheel
speed sensors with reference values, which
must be reinitialised every time the tyre
pressures are adjusted or a wheel changed.
It takes into account the last values stored
during the reinitialisation request. It is therefore
essential that the tyre pressure is correct during
the operation. This operation is the driver’s
responsibility.
The tyre under-inflation detection cannot, in any circumstances, replace the need
for vigilance on the part of the driver.
This system does not avoid the need to
regularly check the tyre pressures (including
the spare wheel), especially before a long
journey.
Driving with under-inflated tyres, particularly
in adverse conditions (heavy load, high
speed, long journey):
–

worsens road-holding.
–


lengthens braking distances.
–


causes premature wear of the tyres.
–


increases energy consumption.
The inflation pressures defined for the vehicle can be found on the tyre pressure
label.
For more information on the Identification
markings, refer to the corresponding section.
Checking tyre pressures
This check should be done monthly
when the tyres are "cold" (vehicle stopped for
1 hour or after a journey of less than 6 miles
(10

km) at moderate speeds).
Otherwise, add 0.3 bar to the pressures
shown on the label.
Snow chains
The system does not have to be
reinitialised after fitting or removing snow
chains.
Under-inflation alert
This is signalled by the fixed illumination of this warning lamp, accompanied by an
audible signal and, depending on equipment, the
display of a message.
►

Reduce speed immediately
, avoid excessive
steering movements and avoid sudden braking.
►

Stop the vehicle as soon as it is safe to do
so.
The loss of pressure detected may not always cause visible deformation of the
tyre.
Do not rely on just a visual check.
►

Using a compressor
, such as the one in
the temporary puncture repair kit, check the
pressures of all four tyres when cold.
►

If it is not possible to carry out this check
immediately

, drive carefully at reduced speed.
►

In the event of a puncture, use the
temporary puncture repair kit or the spare wheel
(depending on equipment).
Driving too slowly may not ensure
optimum monitoring.
The alert is not immediately triggered in the
event of a sudden loss of pressure or tyre

11 3
Driving
6instrument panel must match that of the
country you are driving in.
Automatic sign reading is a driving aid system and does not always display the
correct speed limits.
The speed limit signs present on the road
always take priority over those displayed by
the system.
The system is designed to detect signs that
conform to the Vienna Convention on road
signs.
Specific speed limits, such as those for
heavy goods vehicles, are not displayed.
The display of the speed limit on the
instrument panel is updated when passing
a speed limit sign intended for cars (light
vehicles).
Activation/Deactivation
By default, the system 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
The settings are changed via the Vehicle
touch screen menu.
With MyCitroën Drive Plus
The settings are changed via the ADAS
touch screen application.
Information displayed on
the instrument panel


1. Detected speed limit indication
or
2. End of speed limit indication


The system is active but is not detecting speed
limit information.


On detecting speed limit information, the system
displays the value.


For a suggested maximum speed, the first time
that the vehicle exceeds it
by more than 3 mph
(5
km/h) (e.g. 59 mph (95 km/h)), the speed is
displayed and flashes for 10 seconds (depending
on version).
Operating limits
The system does not take account of reduced
speed limits, especially those imposed in the
following cases:
–

Atmospheric pollution.
–

Towing.
–

Driving with a space-saver type spare wheel
or snow chains fitted.
–


T
yre repaired using the temporary puncture
repair kit.
–

Y
oung drivers.
The system may not display the speed limit if it
does not detect a speed limit sign within a preset
period and in the following situations:
–

Road signs that are obstructed, non-standard,
damaged or bent.
–


Obsolete or incorrect maps.
Speed setting
recommendations
The driver can select the speed displayed by the
Road signs recognition system as the speed
setting for the speed limiter, cruise control or
adaptive cruise control using the OK button.
In the event of rain detection, the system offers
the driver a speed setting lower than the speed

11 7
Driving
6Cruise control
For more information, refer to the
General recommendations on the use
of driving and manoeuvring aids and the
Cruise control - particular
recommendations.
This system automatically maintains the vehicle’s speed at the value programmed
by the driver (speed setting), without the use of
the accelerator pedal.
Cruise control is switched on manually.
It requires a minimum vehicle speed of 25 mph
(40

km/h).
With a manual gearbox, third gear or higher must
be engaged.
With an automatic gearbox, mode

D
or second
gear or higher in mode

M
must be engaged.
With a drive selector, mode
D or B must be
engaged.
Cruise control remains active after
changing gear, regardless of the gearbox
type, on engines fitted with the Stop & Start
function.
Switching off the ignition cancels any
speed setting.
Steering-mounted controls



1. Cruise control selection
2. Switch on/pause cruise control at the
previously saved speed setting
3. Increase/Decrease the speed setting (if
cruise control activated)
Activation of cruise control in progress (if
cruise control deactivated)
4. Activation of cruise control in progress
Use the speed suggested by the Road signs
recognition
For more information on the Road signs
recognition


function, refer to the corresponding
section.
Information displayed on
the instrument panel


5. Cruise control mode selection indication
6. Cruise control on (green)/pause (grey)
indication
7. Speed setting value
8. Speed suggested by the Road signs
recognition function (depending on version)
Switching on/pausing
► Press button 1 to select the cruise control
mode; the function is paused (grey).
►

Press
3 upwards/downwards, or press 4-OK
to activate the cruise control and save a speed
setting as soon as the vehicle speed reaches the
desired level (green).
►

Pressing button 2-I I>

temporarily pauses the
function.

120
Driving
Steering-mounted controls



1. Selection/deselection of cruise control only or
Highway Driver Assist (depending on version)
2. Switch on/pause cruise control at the
previously saved speed setting
Confirmation of vehicle restart after automatic
stop (version with Stop & Go function)
3. Increase/Decrease the speed setting (if
cruise control activated)
Activation of cruise control in progress (if
cruise control deactivated)
Display and configuration of the inter-vehicle
distance setting
4. Activation of cruise control in progress
Use the speed suggested by the Road signs
recognition function
For more information on the Road signs
recognition


function, refer to the corresponding
section.
Information displayed on
the instrument panel


5. Cruise control activated (green)/paused
(grey)
6. Speed setting value
7. Speed suggested by the Road signs
recognition function
8. Vehicle held stationary (version with
Stop&Go function)
9. Inter-vehicle distance setting
10. Position of the vehicle detected by the
system
Use
Selecting the system
► With the engine running, press 1-ASSIST to
select cruise control mode.
The symbol for the Adaptive cruise control system is displayed on the instrument
panel.
Switching on cruise control
With an EAT8 automatic gearbox or a drive
selector, your speed must be between 0 and
112
mph (0 and 180 km/h).
System activation is also subject to the following
conditions:
–

driver's door closed.
–


driver's seat belt fastened.
–

mode D selected on the automatic gearbox.
–

parking brake released.
–


if the vehicle is stationary
, brake pedal
depressed.
►

Press
3 or 4-OK: the current speed becomes
the speed setting (minimum 19 mph (30
km/h))
and cruise control is immediately activated
(green display).
Modifying the speed setting
To change the speed setting using the vehicle’s
current speed:
►

For steps of +/- 1 mph (1 km/h), make
successive short presses upwards/downwards
on

3 to increase/decrease.
►

For steps of +/- 5 mph (5
km/h), press and
hold upwards/downwards on 3 to increase/
decrease.
Prolonged pressing and holding
upwards/downwards on 3 causes a rapid
change in vehicle speed.