Get MAINTENANCE Guide for Citroen C6 4 Door Second Generation (2016-2023)

OPENING THE BONNET

IV

A

Lift the lever A located under the bonnet close to the centre, then pull.

This operation should only be

performed while the vehicle is

stationary.

To release the bonnet, pull the con-

trol located under the dashboard

towards you.

To close

Lower the bonnet carefully, then let it drop shut.

When the engine is hot, handle the lever A with care (risk of

burns).

Check that the bonnet is properly secured.

120

LEVELS

REFER TO THE CHAPTER: USER PRECAUTIONS.

Air ﬁlter

Follow the requirements

set out in the Maintenance

and Warranty Guide.

Engine oil

Brake ﬂuid

The level of ﬂuid should be

between the marks MIN.

and MAX. on the reservoir.

IV

A

D

Check the engine oil level on

horizontal ground with the

engine havingbeen switched

off for at least 30 minutes.

Quality: See "Maintenance and

Warranty Guide".

If this warning lamp comes on

when driving, stop as soon as

it is safe to do so and contact a

CITROËN dealer or a qualiﬁed

workshop.

It is normal to top up the engine oil

between two services. The manu-

facturer recommends that the oil be

checked and topped up if necessary

every 3 000 miles (5 000 Km).

Quality: See "Maintenance and

Warranty Guide".

Screen wash and

headlamp wash ﬂuid

Use CITROËN-approved

products wherever possible.

Capacity: See "Capacity".

Pull out the manual dips-

tick.

Thelevelshouldbebetween

the marks MIN. and MAX.

on the gauge.

Engine coolant

The ﬂuid level should be

betweenthemarksMIN.and

MAX. on the header tank.

Engine hot, wait at least 15 minutes.

Power steering and

suspension oil

For topping up, it is neces-

sary to go to a CITROËN

dealer or a qualiﬁed workshop.

B

It must never exceed the

maximum.

Quality: See "Maintenance and

Warranty Guide".

Quality: See "Maintenance and

Warranty Guide".

Never do anything relating to

the cooling system of an engine

that is hot.

MAX.

MIN.

Poles "+" and "-" for

starting with a slave

battery

•

If opening the bonnet when the engine is hot, even if it is

stopped and the ignition is switched off, remember that

the cooling fan may operate at any moment.

Between routine servicing visits, check the level of

engine oil frequently as well as before going on a long

journey.

C

See "Starting with a slave battery".

121

HDi ENGINE

V6 Hdi engine

D

B

IV

A

C

The diesel fuel circuit being

under high pressure:

ANY INTERVENTION ON THE

CIRCUIT IS PROHIBITED.

HDi engines are the result of advanced technology.

Any intervention requires special qualiﬁcations which only

a CITROËN dealer can guarantee.

122

LEVELS

D

B

IV

1

TOPPING UP ENGINE OIL

RADIATOR – COOLANT FLUID

Topping up the coolant

Before ﬁlling, pull out the dipstick.

Check the dipstick after ﬁlling.

It must never exceed the maximum.

Checking the level and topping up

with ﬂuid must always be done with

the engine cold.

The level of coolant 1 should be

between the MIN. and MAX.

kings on the header tank.

Top up the level. If more than 1 litre

is added, have the cooling system

checked by a CITROËN dealer or

a qualiﬁed workshop.

Make sure that the cap is back

on properly.

Note: If you need to top up the ﬂuid

frequently, this indicates a malfunc-

tion which you should get checked

at the earliest opportunity.

-

Engine hot

Screw the cap back on and close

the bonnet.

Quality: See "Maintenance and

Wait 15 minutes or for the tempe-

rature to be lower than 100 °C and

then carefully unscrew the cap so as

to allow the pressure to drop, pro-

tecting yourself with, for example, a

cloth.

Warranty Guide".

Remark: The cooling fan may

operate for around 10 minutes

after the engine has stopped.

Quality: See "Maintenance and

Warranty Guide".

If opening the bonnet when the engine is hot, even if it is

stopped and the ignition is switched off, remember that the

cooling fan may operate at any moment.

123

12 V BATTERY

D

C

IV

B

A

CHANGING THE BATTERY (Contact a CITROËN dealer or a qualiﬁed

workshop).

BATTERY LOCATION AND

ACCESS

1.Release the two pins on each side at the back of the boot, and remove

the boot ﬂoor.

The battery is located in the boot

under the left hand wing trim. To

access the battery, rotate the pin

on the ﬂap by a 1/4.

2.On each side trim, release the two ﬁxing pins A

3.Undo the two screws B on each side and remove the sill embellisher.

4.On the side trim close to the battery, release the pin D

5.Separate the side trim close to the battery, pulling hard to free the other

ﬁxing points.

6.Unclip the boot lamp C

7.Disconnect both battery terminals.

8.Release the battery from its support.

9.Remove the battery.

Before changing or repairing the battery, open all four windows.

If you have to unlock your vehicle with the keybecause of a problem with the battery, anyopening/closing

of a door with the window closed may seriously damage the glass to the point of breaking it.

124

12 V BATTERY

STARTING THE ENGINE AFTER DISCONNECTING AND RECONNECTING THE BATTERY

1. Turn the ignition key.

2. Wait approximately 1 minute before operating the starter in order to allow the electronic systems to re-initialise.

After the battery has been disconnected for a lengthy period of time, it may be necessary to re-initialise the following

functions:

IV

•

The anti-pinch on the windows.

The anti-pinch on the sun roof.

The multifunction display parameters (date, time, language, units of distance and of temperature).

The Radio stations.

The NaviDrive. See the NaviDrive chapter.

IMPORTANT

In the event of a battery failure, and if the boot is closed, it is then necessary to feed an electrical supply to your

vehicle. See following page.

125

12 V BATTERY

A Pole "+" on the vehicle being assisted (under the

red cover).

B Assisting battery.

C Pole on the assisted vehicle (under the bonnet).

Check that the leads are well secured (risk of sparks).

A

IV

Start the engine of the assisting vehicle. Let the engine

run for around 1 minute at a slightly accelerated idle.

Operate the starter on the vehicle being assisted.

It is essential to follow the indicated sequence

correctly.

C

STARTING THE ENGINE WITH AN ASSISTING

BATTERY

If the battery is discharged, it is possible to use either

a separate emergency battery or a battery on another

vehicle.

ADVICE

i

Do not touch the leads during the operation.

Do not lean over the batteries.

If you use the battery on another vehicle, stop the

engine on the latter. The two vehicles must not come

into direct contact with each other.

Disconnect the cables in reverse order, making sure

they do not touch together.

Check that the assisting battery has sufﬁcient voltage

(12 V).

Connect the cables according to the order indicated in

the diagram.

Never approach with a ﬂame or create sparks in the vicinity of the battery (explosive gas).

The battery contains dilute sulphuric acid which is highly corrosive.

When handling batteries, always protect your face and especially your eyes.

In the event of any contact with the skin, rinse immediately with copious amounts of fresh water.

126

FUSES

DASHBOARD

FUSEBOXES

There are two fuseboxes under the dashboard, one in

the engine compartment and another in the boot under

the left hand wing trim.

Box B

IV

Dashboard fuses

To access the fuses under dashboard:

1- Open the storage cover as wide as possible

without forcing.

2- To be able to open the cover to the maximum, pull

it on the right hand side.

3- Remove the protective trim located between the

fuses and the storage cover to access the fuses.

REPLACING A FUSE

Before replacing a fuse, you should ascertain the cause

of the fault and have it remedied. The numbers of the

fuses are indicated on the fusebox.

Replace the fuse that has blown with one of the

same rating (same colour).

Use the special pliers A placed on the ﬂap close to the

fuseboxes. The ﬂap also has spare fuses available.

Good

Bad

Pliers A

Box B

F11

SH

F17

F2

F9 F6 F5 F1 F7 F4 F3 F10 F8 F13 F12 F14

F15

127

TABLE OF FUSES

DASHBOARD FUSES (BOX B)

IV

Ref.

G 29

G 30

G 31

G 32

G 33

G 34

G 35

G 36

G 37

G 38

G 39

G 40

Rating

5 A

Function

Deﬂation detection – Changer for 6 CDs

Diagnostic socket

5 A

Telematics according to destination

Ampliﬁer

25 A

10 A

15 A

–

Hydraulic suspension system

Automatic gearbox

Front passenger’s heated seat

Driver’s heated seat

–

30 A

–

Driver’s electric seat

–

30 A

Passenger’s electric seat

128

TABLE OF FUSES

DASHBOARD FUSES (BOX C)

IV

Ref.

Rating

Function

F 1

F 2

F 3

–

5 A

Airbags

Braking system – Active bonnet – Cruise contol/speed limiter – Photochromic rear view mirror – Diagnostic socket –

Multifunction screen inclination motor

F 4

10 A

F 5

F 6

30 A

5 A

Front window – Sun roof

Rear window

F 7

Sun visor lighting – Glove box lighting – Interior lamps – Rear cigar-lighter

F 8

20 A

30 A

15 A

Controls at the steering wheel – Display – Opening of windows (Micro-descent) – Alarm – Radio

F 9

Front cigar-lighter

F 10

F 11

Boot relay unit – Trailer relay unit

Steering lock

Driver’s and front passenger’s seat belt warning lamp – Opening of windows (Micro-descent) – Electric seats – Parking

assistance – Audio system JBL

F 12

F 13

F 14

15 A

5 A

Active bonnet – Rain and brightness sensor – Windscreen wiper – Engine relay unit supply

®

Lane Departure Warning System – Air conditioning – Instrument panel – Head-up display – Airbags – Bluetooth

(Hands-free kit) – BHI relay

15 A

F 15

F 16

F 17

30 A

SHUNT

40 A

Central locking – Child safety

–

129

Ventilation

FUSES

UNDER THE BONNET

FUSES UNDER THE BONNET

Ref.

F 1

Rating

20 A

Function

Engine ECU – Cooling fan

Horn

IV

F 2

15 A

F 3

10 A

Screen wash pump

Headlamp wash

F 4

20 A

F 5

15 A

Preheating – Injection (Diesel)

F 6

F 7

F 8

F 9

10 A

20 A

10 A

Braking system

Automatic gearbox

Starter

FUSEBOX

To access the fusebox in the engine

compartment, undo each screw a

1/4 turn.

After a repair, take care to reclose

the cover.

Active bonnet – Xenon dual function directional headlamps

Injectors – Ignition coil – Engine

ECU – Fuel supply (Diesel)

F 10

30 A

F 11

F 12

F 13

F 14

40 A

30 A

40 A

–

Air conditioning (Blower)

Windscreen wiper

BSI

All work on the MAXI fuses, located in the fuseboxes, which

provide additional protection, must be done by a CITROËN dealer

or a qualiﬁed workshop.

130

FUSES IN THE BOOT

1

2

3

4

5

IV

G36

G37

G38

G39

G40

FUSEBOX

Rating

Function

To access the fusebox located

under the left hand wing trim:

1. Move aside the trim on the

LH side. See "12 V battery:

Changing the battery".

2. Move aside the electrical cables

connecting to the fusebox.

3. Open the fusebox.

F 1

F 2

F 3

F 4

F 5

15 A

Fuel ﬂap

–

15 A

40 A

Speed-sensitive rear spoiler (deﬂector)

Heated rear screen

G 36

G 37

G 38

15 A/25 A

30 A

Rear LH electric heated seat (Pack Lounge)/Benchseat

Rear RH electric heated seat (Pack Lounge)/Benchseat

Rear electric seat adjustments (Pack Lounge)

G 39

G 40

30 A

25 A

Cigar-lighter – Rear accessory socket

Electric parking brake

131

CAPACITIES

IV

Capacity of ﬂuid for windscreen wash

and headlamp wash (in litres)

6,5

V6 HDi

5,55

ENGINE TYPE

Engine oil capacities (in litres)⁽¹⁾

⁽¹⁾After draining with change of oil ﬁlter.

132

MAINTENANCE for Your Citroen C6 4 Door Second Generation (2016-2023)

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