Locking / Unlocking
The various door states are managed using the remote control, the key or the central locking button.
These states can be set by the driver's choice or by automatic functions.
The fuel filler cap is fitted with a key lock.
Locking / Unlocking with the key
This function locks or unlocks the vehicle with the key by operating the front door locks.
| FUNCTION | LOCKING | UNLOCKING |
| Action | The BSI commands locking | The BSI commands unlocking |
| IF condition | Locking command from the front locks | Unlocking command from the front locks |
| AND condition | The vehicle is unlocked | The vehicle is locked |
| AND condition | The doors are closed, otherwise there is rebound | |
| Indication with the key not detected in the steering lock | Indicator lamp flashing at 1 Hz; direction indicators on for 2 seconds | Indicator lamp on steady; direction indicators flashing at 5 Hz for 3 seconds |
| Indication with the key detected in the steering lock | LED off Direction indicators on for 2 seconds |
The LED is on steadily Direction indicators flash at 5 Hz for 3 seconds |
Locking / Unlocking using the remote control
This function locks or unlocks the vehicle, ignition off, in response to a command from the RF remote control.
| FUNCTION | LOCKING | UNLOCKING |
| Action | The BSI commands locking | The BSI commands unlocking |
| IF condition | Super-locking command from the remote control | Unlocking command from the remote control |
| AND condition | The vehicle is unlocked | The vehicle is locked |
| AND condition | The openings are closed | |
| Indication with the key not detected in the steering lock | The LED flashes at 1 Hz. Direction indicators on for 2 seconds |
The LED is on steadily. Direction indicators flash at 5 Hz for 5 seconds |
| Indication with the key detected in the steering lock | The LED is off | The LED is on |
Locking / Unlocking using the interior button
This function locks or unlocks the vehicle at the user's request by pressing the central locking button on the dashboard.
Each press of the central locking button alternately locks or unlocks all openings (doors and tailgate).

Note: The central locking button is disabled when the vehicle is locked by the remote control or by the door lock.
Unlocking by operating the interior opening controls
The unlocking by operating the interior opening controls function unlocks the vehicle openings when an interior door opening control is operated.

Crash unlocking
The crash unlocking function unlocks the vehicle.

Opening the tailgate
By interior electric button (depending on equipment)
The tailgate is opened by the interior electric button under the following conditions:

By exterior electric button
The tailgate is opened by the exterior electric button under the following conditions:

Rebound function
A rebound on locking consists of locking and then unlocking the locks if one of the openings is open.

Automatic re-locking function
This function prevents a vehicle that has been unlocked by mistake from being left unlocked.

Tailgate automatic locking function
This function automatically locks the vehicle tailgate when the speed of 10 km/h is exceeded.

Test yourself
A quick Citroen C5 Aircross quiz: every answer comes with an explanation and a link to the manual page.