2008 Citroen C4 battery

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Access to the battery
The battery is located in the engine compartment.
For access to it:
- open the bonnet using the interior release lever, then the exterior safety catch,
- fi x the bonnet stay in place,
- remove the plastic cover for access to the two terminals,
- if necessary, unclip the fusebox to remove the battery.
Emergency starting with a slave battery
A vehicle with a discharged battery can be started with either a slave battery or the battery of another vehicle.
A Discharged battery
B Slave battery
It is essential to proceed strictly fol-lowing the sequence indicated.
Check that the emergency battery is correctly charged up (12 volts).
If you are using the battery on an-other vehicle, stop the engine of the assisting vehicle. The two vehicles must not come into direct contact with each other.
Never apply a fl ame or create sparks close to the battery (explosive gas).
The battery contains diluted sulphuric acid which is highly corrosive.
If ever you are handling the battery, protect your eyes and face.
In the event of any contact with the skin, rinse immediately with copious amounts of fresh water.
If the vehicle is not used for more than one month, it is recommended that the battery be disconnected.
Advice
Replace it with a battery of the same type (voltage, amp rating).
Do not touch the cable clamps during the procedure.
Do not lean over the batteries.
Disconnect the cables in the reverse order to connection, ensuring that they do not touch each other.
Connect the cables in the order indi-rdercated in the diagram. Make sure that the clamps are properly secured (risk of sparks).
Start the engine of the assisting ve-hicle. Let the engine run for about a minute at a slightly accelerated speed.
Start the engine of the assisted vehicle.
Note: For any repair necessitating a disconnection of the battery, it is essential to wait three minutes af-ter switching off the ignition and to avoid any action that could prevent the vehicle’s electrical circuit from changing to standby mode (such as opening and closing doors, using the remote control etc.).

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Starting the engine for the fi rst time after disconnecting and connecting the battery:
- Turn the ignition key.
- Wait approx. one minute before actioning the starter, so as to allow the electronic systems to reinitialise.
Before disconnection
Before disconnecting the battery, wait 3 minutes after switching off the ignition, and close the windows and doors.
After disconnection
After the battery has been discon-nected for a long period, it may be necessary to re-initialise the follo-wing functions:
- Anti-pinch and sequential operation on the electric windows.
- Parameters of the multifunction display (date, time, language, units of distance and temperature).
- Radio stations.
- Navigation reception.
- Synchronisation of remote control.
- Central locking.
Certain adjustments will be can-celled: it is necessary to make them again.
Economy mode
In order not to discharge the bat-tery when the engine is stopped, your vehicle goes automatically into economy mode.
The electrical components relating to comfort and headlamps (not side-lamps or hazard warning lamps) are automatically cut.
To reactivate them, the engine must be run for:
- less than 10 minutes to have the systems available for an equivalent period.
- more than 10 minutes to keep them available for approximately 30 minutes.
Note: a starting economy mode message appears on the multi-function screen.

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Swapping a call
During a telephone conversation, the system is able to tell you of a second call incoming. To accept it, validate. To change from one call to the other, select this choice.
End a call
This choice enables you to end a telephone conversation, for example if there is another call incoming.
Secret mode
Selecting this choice allows you not to be heard by the other person. To restore sound to the other person, select deactivation of Secret mode in the menu "Call Management".
Note:
If you wish to transfer a call from the audio system to the mobile telephone (for example when leaving your vehicle), refer to the user instructions for the latter.
Voice recognition
A short press on button 12 starts voice recognition for the telephone.Voice recognition allows you to make a call to a number for which you have recorded a label on the mobile telephone that is twinned and connected.
Remark:
It is possible to stop the call as long as the dialling has not commenced, by means of a short press on button 12.
Remarks:
- While you are on a call, the audio source currently being listened to is paused.
- Some ring tones on your mobile telephone may not be recognised by the Bluetooth® system on your ®
vehicle. A different ring tone will be chosen by the system.
Displays
Press the "MODE" button to display telephone information in the right hand part of the display.
A "Telephone" symbol appears on your display when you connect a mobile telephone.A "Battery" symbol appears at the bottom of the display to indicate the range of the mobile telephone connected.An "Envelope" symbol appears at the bottom of the display to indicate the presence of an unread SMS on the mobile telephone connected.A "Sound track" symbol appears at the bottom of the display to indicate the presence of a message on the mobile telephone connected.

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QUESTIONANSWERSOLUTION
The pre-set stations do not work (no sound, 87.5 Mhz is displayed, etc.).
The waveband selected is not the correct one.Press on the button BAND AST to retrieve the wave band (AM, FM1, FM2, FMAST) where the stations have been memorised.
Traffi c Announcements (TA) is displayed, but I do not receive any road information.
The particular radio station is not in the regional traffi c information network.Change to a radio station which does broadcast traffi c information.
The reception quality of the radio station being listened to gradually deteriorates or the pre-set stations do not work (no sound, 87.5 Mhz displayed, etc.).
The vehicle is too distant from the transmitter of the station being listened to, or no transmitter is present in the geographical area you are passing through.
Activate the RDS function to allow the system to check whether a more powerful transmitter is to be found in the geographical area.
The environment (hills, high buildings, tunnels, underground car parks, etc.) is blocking reception, even in RDS mode.
This phenomenon is normal and does not imply anything wrong with the radio.
The aerial is absent or has been damaged (for example after going through a car wash or in an underground car park).
Have the aerial checked by a CITROËN dealer.Have the aerial checked by a Have the aerial checked by a
Cutting of sound for 1 or 2 seconds in radio mode.
The RDS system during this brief sound cut-off is searching for a better frequency that might offer improved reception of the station.
Deactivate the RDS function if the phenomenon occurs too frequently and always on the same journey.
When the engine is not running, the radio stops after a few minutes.
When the engine is switched off, the working time for the radio depends on the vehicle n the engine is switched off, the working n the engine is switched of
battery charge.
The interruption is normal: the radio goes into economy mode, cutting off in order to save the erruption is normal: the radio goes into erruption is normal: the radio goes into
vehicle’s battery.
You have to start the engine so as to increase the battery charge.
The message "the audio system is overheating" appears on the screen.
In order to protect the audio equipment in excessive ambient temperatures, the radio goes into an automatic thermic protection mode which results in a reduction in sound volume or stopping of the CD player.
Switch off the audio system for a few minutes in order to allow the system to cool down.