2020 CITROEN C4 sensor

162
Practical information
Changing to free-wheeling
In certain situations, it is necessary to put the
vehicle into free-wheeling mode (e.g. towing, on
a rolling road, automatic car wash (Wash mode),
rail or sea transport).
The procedure varies according to the type of
gearbox and parking brake.
Never leave the vehicle unattended with
the vehicle into free-wheeling mode.
Keyless Entry and Start
You must not depress the brake pedal
while switching the ignition on again, then
switching it off. If you do, the engine will start,
requiring you to restart the procedure.
/
Release procedure
► With the vehicle stationary and the engine
running, depress the brake pedal and select
mode
N.
Within 5
seconds:
►

Depress and hold the brake pedal, then
observe this order: switch off the engine and
move the push selector forwards or backwards.
►


Release the brake pedal, then switch on the
ignition.
►


Place your foot on the brake and press the
electric parking brake control to release it.
► Release the brake pedal, then switch off the
ignition.
A message is displayed on the instrument panel to confirm the unlocking
of the wheels for 15
minutes.
After 15 minutes or reverting to normal
operation
► While depressing the brake pedal, restart the
engine and select mode P .
Advice on care and maintenance
General recommendations
Observe the following recommendations to avoid
damaging the vehicle.
Exterior
Never use a high-pressure jet wash in
the engine compartment - risk of
damaging the electrical components!
Do not wash the vehicle in bright sunshine or
extremely cold conditions.
When washing the vehicle in an
automatic roller-brush car wash, be sure
to lock the doors and, depending on version,
move the electronic key away.
When using a pressure washer, keep the jet
nozzle at a minimum distance of 30 cm from
the vehicle (particularly when cleaning areas
containing chipped paint, sensors or seals).
Promptly clean up any stains containing
chemicals liable to damage the vehicle's
paintwork (including tree resin, bird
droppings, insect secretions, pollen and tar).
Depending on the environment, clean the
vehicle frequently to remove salty deposits
(in coastal areas), soot (in industrial areas)
and mud/salts (in wet or cold areas). These
substances can be highly corrosive.
Contact a CITROËN dealer or a qualified
workshop for advice on removing stubborn
stains requiring special products (such as tar
or insect removers).
Preferably, have paint touch-ups performed
by a CITROËN dealer or a qualified
workshop.
Interior
When washing the vehicle, never use a
water hose or high-pressure jet to clean
the interior.
Liquids carried in cups or other open
containers can spill, presenting a risk of
damage to the instruments and controls and
the controls located on the centre console. Be
vigilant!

234
Event data recorders
Recording event data
Electronic control units are installed in your
vehicle. These control units process data
received from the vehicle's sensors, for example,
or data they generate themselves or exchange
with each other. Some of these control units are
required for the correct operation of your vehicle,
some others assist you while driving (driving or
manoeuvring aids), while others provide comfort
or infotainment functions.
The following contains general information about
how data is processed within the vehicle.
You will find additional information about the
specific data which is downloaded, stored
and transmitted to third parties and what it is
used for in your vehicle under the keyword
"Data protection". This information is directly
associated with the references for the functions
in question contained in the corresponding
vehicle handbook, or in the general terms and
conditions of sale.
This information is also available online.
Vehicle operating data
The control units process the data used for the
operation of the vehicle.
This data includes, for example:
–
Information about the state of the vehicle
(e.g.

speed, travel time, lateral acceleration,
wheel rotation rate, fastened seat belts display).
–

Environmental conditions (e.g.
temperature,
rain sensor, distance sensor). As a general rule, this data is temporary, is
not stored for longer than one operating cycle
and is only used within the vehicle itself. The
control units often record this data (including the
vehicle's key). This function allows either the
temporary or permanent storage of information
about the state of the vehicle, stresses on
components, servicing requirements, as well as
events and technical errors.
Depending on the vehicle's equipment level, the
data stored is as follows:
–

Operating state of system components
(e.g.
filling level, tyre pressures, battery charge
status).
–
Faults and malfunctions in important system
components (e.g.
lamps, brakes).
–
System reactions in specific driving situations
(e.g.
deployment of an airbag, triggering of
stability control and braking systems).
–
Information about events which have
damaged the vehicle.
–

For electric and rechargeable hybrid vehicles,
the traction battery charge level and the
estimated driving range.
In particular circumstances (e.g.
if the vehicle
has detected a malfunction), it may be necessary
to record data which would otherwise simply not
be stored.
When taking your vehicle in for servicing
(e.g.
repairs, maintenance), the stored operating
data may be read along with the vehicle's
identification number and used if necessary.
The personnel working for the servicing network (e.g.
garages, manufacturers) or third parties
(e.g. roadside assistance agents) may read
the vehicle's data. This also applies to work
carried out under warranty and quality assurance
measures.
This data is generally read via the OBD
(On-Board Diagnostics) port fitted by law to
the vehicle. It is used to report on the technical
state of the vehicle or its components and
facilitates the diagnosis of malfunctions, in
compliance with warranty obligations and for
quality improvement. This data, in particular the
information relating to stress on components,
technical events, operator errors and other
malfunctions, is sent to the Manufacturer, if
necessary, along with the vehicle's identification
number. The Manufacturer's liability may also be
engaged. The Manufacturer may also use the
operating data taken from the vehicle for product
recalls. This data may also be used to check the
customer's warranty and any claims made under
warranty.
Any malfunctions stored in the vehicle may be
reset by an after-sales service company during
servicing or repair work, or at your request.
Comfort and infotainment
functions
Comfort settings and personalised settings
may be saved in the vehicle and modified or
reinitialised at any time.

237
Alphabetical index
180° rear vision 131
360 Vision
130
A
ABS 69
Accelerated charging unit (Wallbox)
141
Accessories

66
Active Safety Brake

122–124
AdBlue®

20, 160
AdBlue® tank

161
Additive, Diesel

158
Adjusting headlamps

59
Adjusting head restraints

40
Adjusting seat

40–41
Adjusting the air distribution

49–50
Adjusting the air flow

49–50
Adjusting the date

206, 229
Adjusting the height and reach
of the steering wheel

42
Adjusting the lumbar support

41
Adjusting the seat angle

41
Adjusting the temperature

48, 50
Adjusting the time

206, 230
Advice on care and maintenance

139, 162
Advice on driving

7, 84–85
Airbags

73, 75, 77
Airbags, curtain

74–75
Airbags, front

74–75, 77
Airbags, lateral

74–75
Air conditioning

46–47, 49
Air conditioning, automatic 50
Air conditioning, dual-zone automatic
47, 50
Air conditioning, manual

47, 50
Air intake

50
Air vents

45
Alarm

35–36
Amplifier, audio

54
Android Auto connection

204, 221
Anti-lock braking system (ABS)

69
Antitheft / Immobiliser

29
Apple CarPlay connection

203, 220
Applications

221
Assistance call

67–68
Assistance, emergency braking

70, 124
Audible warning

67
Audio streaming (Bluetooth)

200, 225
B
Battery, 12 V 153, 158, 175–177
Battery, ancillaries
175
Battery, charging

175–176
Battery, remote control

33–34
Blind

38–39
Blind spot sensors

121
BlueHDi

20, 158, 165
Bluetooth (hands-free)

201–202, 226
Bluetooth (telephone)

201–202, 226–227
Bluetooth touch screen audio system

24
Bodywork

163
Bonnet

154–155
Boot 35, 56
Brake discs
159
Brake lamps

174
Brakes

159
Braking

95
Braking assistance system

69–70
Braking, automatic emergency

122–124
Braking, dynamic emergency

90–92
Brightness

205
Bulbs

173
Bulbs (changing)

171–172, 174
C
Cable, audio 224
Cable, Jack
224
Capacity, fuel tank

137
Cap, fuel filler

137
Care of the bodywork

163
Central locking

31–32
Changing a bulb

171–172, 174
Changing a fuse

174
Changing a wheel

169
Changing a wiper blade

64
Changing the remote control battery

33
Changing to free-wheeling

178
Charge level indicator (Electric)

21
Charger, induction

53
Charger, wireless

53
Charging cable

142
Charging cable (Electric)

141

241
Alphabetical index
OIl, engine 156
On-board tools
56, 165–166
Opening the bonnet

154
Opening the boot

30, 35
Opening the doors

30, 35
Opening the windows

28
P
Pads, brake 159
Paint
163, 185
Paint colour code

185
Park Assist

132
Parking brake

89, 159
Parking brake, electric

90–92, 159
Parking sensors, audible and visual

126
Parking sensors, front

127
Parking sensors, rear

126
Passenger compartment temperature pre-
conditioning (Electric)

27, 51
Pedestrian horn (Electric)

67, 85
Personalisation

10
Plates, identification

185
Player, Apple®

200, 225
Player, USB

200, 224
Port, USB

52, 200, 203, 220, 224
Post Collision Safety Brake

70
Power

21
Power indicator (Electric)

8, 21
Pressures, tyres

159, 167, 185
Pre-tensioning seat belts

72
Priming the fuel system 165
Profiles
229
Protecting children

74–80
Proximity Keyless Entry & Start

30
Public fast charging station

141, 147
Puncture

166–167, 169
R
Radar (warnings) 101
Radio
198, 223
Radio, digital (Digital Audio
Broadcasting - DAB)

199–200, 224
Range, AdBlue®

20, 158
RDS

199, 223
Reading lamps

55
Rear screen, demisting

51
Recharging the battery

175–176
Recharging the traction battery
(Electric)

138, 142, 145, 147–148
Recirculation, air

50
Recovery

178–180
Recovery of the vehicle

178–179
Reduction of electrical load

154
Regeneration of the particle filter

158
Regenerative braking (deceleration
by engine braking)

94–95
Reinitialisation of the under-inflation
detection system

99–100
Reinitialising the remote control

34
Reminder, key in ignition

87
Reminder, lighting on 57–58
Remote control
28–32
Remotely operable functions
(Electric)

27, 51, 148
Removing a wheel

169–171
Removing the mat

54
Replacing bulbs

171–172, 174
Replacing fuses

174
Replacing the air filter

158
Replacing the oil filter

158
Replacing the passenger compartment
filter

158
Reservoir, screenwash

157
Reset trip

24
Retractable support

52
Rev counter

9–10
Reversing camera

102, 127–130
Reversing lamps

174
Roof bars

152–153
Roof, opening

38–39
Running out of fuel (Diesel)

165
S
Safety, children 74–80
Saturation of the particle filter (Diesel)
158
Screenwash

63
Screenwash, front

62
SCR (Selective Catalytic Reduction)

21, 160
Seat angle

41
Seat belts

71–72, 78

242
Alphabetical index
Seat belts, rear 71
Seat, rear bench
44
Seats, electric

41
Seats, front

40–41
Seats, heated

42, 45
Seats, rear

44–45, 76
Selector, gear

92, 94
Sensors (warnings)

102
Serial number, vehicle

185
Service indicator

18, 22
Servicing

18, 158–160
Settings, equipment

25–26
Settings, system

205, 229
Sidelamps

58, 173–174
Side parking sensors

127
Silent vehicle warning sound (Electric)

67, 85
Smartphone

27, 52–53
Snow chains

99, 153
Socket, 12 V accessory

53
Socket, auxiliary

224
Socket, Jack

224
Speakers

54
Speed limiter

104–106
Speed limit recognition

102, 104
Speedometer

9–10, 102
Sport mode

96
Spotlamps, side

60
Stability control (ESC)

69
Starting a Diesel engine

137
Starting the engine

86, 89
Starting the vehicle

86–87, 94
Starting using another battery

88, 176
Station, radio

198, 223Stay, bonnet 154–155
Steering mounted controls, audio
197, 210
Steering wheel, adjustment

42
Stickers, customising ~ Stickers,
expressive

163
Stopping the vehicle

86–88, 94
Stop & Start

24, 46, 50, 97–98,
137, 154, 158, 178
Storage

52
Storage box

56
Storage wells

56
Sunshine sensor

46
Sun visor

52
Super-fast charging (Electric)

147–148, 184
Suspension

159
Switching off the engine

86, 89
Synchronising the remote control

34
T
Tables of engines 184
Tank, fuel
137–138
Technical data

182–184
Telephone

201–203, 226–228
Temperature, coolant

19
Thermal comfort consumption indicator
(Electric)

22
Thermal comfort equipment

22
Time (setting)

206, 230
TMC (Traffic info)

217
Tool box

56
Tools

165–166
Topping-up AdBlue® 161
Top Rear Vision
128–129
Top Tether (fixing)

78, 81–82
Total distance recorder

23
Touch screen

24–26, 51
Touch screen tablet

25, 52
Towball, quickly detachable

150–152
Towbar

149
Towbar with quickly detachable
towball

150–152
Towed loads

181–183
Towing another vehicle

178, 180
Traction battery (Electric)

21–22, 26,
138, 140, 184
Traction control (ASR)

70
Traffic information (TMC)

217
Trailer

149
Trajectory control systems

69
Triangle, warning

165
Trip computer

23–24
Trip distance recorder

23
Tyres

159, 185
Tyre under-inflation detection

99, 167
U
Under-inflation (detection) 99
Unlocking
28, 30
Unlocking from the inside

32
Unlocking the doors

32
Updating the date

206, 229
Updating the time

206, 230