Function
Function
Standard locking function
Note! The market in Japan has Remote Keyless Entry (RKE) regardless of if the vehicle is equipped with keyless entry system or not. When the vehicle is not equipped with keyless entry system, the Remote Keyless Entry (RKE) communicates directly with Central electronic module (CEM). If the vehicle is equipped with keyless entry system, the Remote Keyless Entry (RKE) communicates via Keyless Vehicle Module (KVM).
The lock function that is active when the car is delivered depends on the market. The system can be configured for total unlocking or 2 step unlocking.
Total unlocking means that all side doors are unlocked and that the tailgate/trunk lid can be opened by activating the switch on the tailgate/trunk lid.
During 2 stage unlocking, only the driver's door is unlocked first. If the remote key is pressed again within 10 seconds, the other doors are unlocked.
The vehicle is normally unlocked by pressing the remote key's unlock button. This also deactivates the alarm if installed. The vehicle can also be unlocked using the key blade in the remote key. Unlocking the car with the key blade should be seen as a last resort. If the car is unlocked with the key blade, the alarm will be triggered. The alarm can then be reset by inserting the remote key in the starter module.
Keyless function
If there is a keyless entry system, the keyless vehicle module (KVM) checks the identity of the remote key during locking and unlocking. After checking the key identity, the keyless vehicle module (KVM) then transmits a command to the central electronic module (CEM) to lock or unlock the central locking. To reduce response time when unlocking, first the keyless vehicle module (KVM) sends an unlock command to relevant door control module. Keyless vehicle module (KVM) uses the antennas in the outer handles on the side doors and in the rear bumper to check the identity of the remote key.
Check of the remote key is done when one of the lock or unlock sensors on the outer door handles or the lock or unlock button on the tailgate is activated. Keyless vehicle module (KVM) then activates one of the outer antennas to check the remote key's identity.
The vehicle is locked using the lock sensors on the door handles or with lock button on the tailgate. During locking, the antenna is also activated to check that there is an authorized remote key in the vicinity of the vehicle. If the remote key is approved, the keyless vehicle module (KVM) transmits a signal to the central electronic module (CEM) to lock the vehicle.
Lock function with deadlocking (market dependent)
Lock function with deadlock mode (BLL) is only available in combination with alarm and only on certain markets.
If lock units with deadlocking (BLL) are installed, there is an additional lock motor in each lock unit. The function of this lock motor is to mechanically disengage the inner door handle. Deadlocking is activated automatically 10 seconds after the vehicle was locked. It will not then be possible to open a side door from the inside, even if a window is smashed. This also means that anyone still in the vehicle when it is locked cannot get out. Activation of reduced alarm takes place via the menu in Infotainment control module (ICM).
Valet locking of the cargo compartment and glove compartment (option)
Valet locking is used to block access to the glove compartment, cargo compartment and certain functions in the car.
The key blade must be taken out of the remote key to activate this function. The function is activated by locking the glove compartment in the normal way using the key blade (turning 0 to 90 degrees) and then continuing to turn (from 90 to 180 degrees). This sets the glove compartment and trunk lid to valet mode and blocks the phone module (PHM) for outgoing calls if installed. A text message in the driver information module (DIM) indicates that the lock is active. The trunk lid cannot now be opened using the remote key or central locking switches in the doors. The key blade is kept by the customer and the remote key can be handed to valet parking attendants or workshop staff who need access to the vehicle.
This function is deactivated by inserting the key blade in the lock cylinder in the glove compartment and turning it back a quarter of a turn (from 180 to 90 degrees). The trunk lid can then be unlocked again using the remote key, central locking switch or the switch on the light switch module (LSM).
Electrical child-proof lock (option)
The electrical child-proof locking function involves an additional lock motor in each rear lock unit. If function for deadlocking (BLL) also is available, the same motor is used for both functions. The lock motor disengages the inner door handle on each rear door so that the door cannot be opened from the inside. The central electronic module (CEM) also deactivates the rear electrical window lift mechanisms while the function is activated. This function is activated using a switch on the control panel in the driver's door. The control panel is serially connected via LIN to the driver door module (DDM). The switch has an alternating function which engages or disengages the function every other time the switch is pressed. The activation switch has a built-in LED to indicate activated function.
The central electronic module (CEM) receives information from the rear door control modules, via the front door control modules, that the function is activated. The position of the lock motors using a contact breaker in the lock unit. The function for child-proof locks can be activated or deactivated in all ignition positions and up to 1 minute after the remote key has been removed from the starter module. If any door is opened within the time for deactivation, the function for child-proof locks. During deactivation, the inner door handles are re-engaged and the rear power window lift mechanisms are activated. The LED in the switch goes out and the driver information module (DIM) displays a message indicating that the function had been deactivated.
A diagnostic trouble code (DTC) is stored in the central electronic module (CEM) if the indication from the lock motors is incorrect or missing, or if deactivation or activation fails. A message is also shown in the driver information module (DIM).
Opening the trunk lid/tailgate
The tailgate/trunk lid can be opened in three ways:
- via the switch on the tailgate/trunk lid if the vehicle is unlocked
- via the button on the remote key
- keyless
- lock button.
The tailgate/trunk lid can be "unlocked" separately using a switch on the light switch module (LSM). When the switch is pressed in, a signal is transmitted to the central electronic module (CEM) indicating that the tailgate/trunk lid must permitted to be opened using the switch in the handle on the lid.
Note! If the unlocking switch for the tailgate/trunk lid on the light switch module (LSM) is pressed in there is no feedback to the driver. That is, nothing will be heard or seen that indicates that the tailgate/trunk lid has been "unlocked".
The lock motor for the tailgate/trunk lid is directly connected to the central electronic module (CEM).
The switch on the tailgate/trunk lid is directly connected to the central electronic module (CEM).
When the switch is pressed in, the central electronic module (CEM) transmits a message to the keyless vehicle module (KVM), which activates the antenna in the bumper and begins checking for an authorized remote key using keyless functionality. If an authorized remote key is found, the keyless vehicle module (KVM) transmits a signal to the central electronic module (CEM) to activate the lock motor in the trunk lid or tailgate. The tailgate/trunk lid is not opened if valet locking is activated.
There is no "unlocked" position for the lock motor for the tailgate/trunk lid. When the motor is activated, it releases the catch in the body and the tailgate/trunk lid can be opened. The tailgate/trunk lid locks when it is closed again. When the tailgate/trunk lid is to be opened, the lock motor is powered for approximately 0.5 seconds or until the central electronic module (CEM) receives a signal from the door open contact breaker in the lock motor indicating that it is open. If the trunk lid/tailgate is not indicated as open during this time, a diagnostic trouble code (DTC) is stored in the central electronic module (CEM).
The button on the remote key can be used to unlock the tailgate/trunk lid even if the rest of the vehicle is locked.
There is also a function for activating the lock motor via the remote key or switch on Light switch module (LSM).
Locking/opening fuel tank filler cover
The switch for opening the fuel tank filler cover is in the light switch module (LSM). The light switch module (LSM) is serially connected, via LIN, to the central electronic module (CEM) and transmits a signal to the central electronic module (CEM) when the switch is pressed. The lock motor is directly connected to the central electronic module (CEM).
When the central electronic module (CEM) receives a signal indicating that the switch has been pressed, the central electronic module (CEM) powers the lock motor, which starts to operate. The lock motor has a spring-loaded piston which returns to its original position after a fully completed cycle. This means that the lock motor only needs to operate in one direction. When the sun roof is closed, it is locked.
If the function for automatic detection of fuel leakage is installed, there may be a delay of up to 1.5 seconds before the filler cover opens. This is so that the fuel tank has time to release the overpressure before the filler cover is opened. This function is only available in USA/CDN.
Light functions
The interior lighting is checked by the central electronic module (CEM). The interior lighting comes on when the vehicle is unlocked.
For further information about the interior lighting, see Design and Function, central electronic module (CEM).
Further light functions are included in the central locking system:
- approach lighting
- approach lights.
Local lighting
Local lighting is activated using the remote key. The following light when activated:
- interior lighting
- parking lamps
- license plate lighting
- door mirror lighting (option).
During initial setting of the lighting it is lit for 30 seconds or until the starter button is pushed. This time can be adapted to the wishes of the customer.
Approach lights
There is a function for approach lights as part of the lighting system. When the engine is off, the remote key is removed from the starter module and the dip switch is activated, the following lights:
- low beam
- parking lamps
- interior lighting.
- license plate lighting
- door mirror lighting (option).
The default setting for the lighting is 30 seconds. This time can be adapted to the wishes of the customer.
Customer settings
The duration that the local lighting and approach lights are on can be adapted to the wishes of the customer.
For information about customer adaptations, see: Diagnostic functions Diagnostic Functions
Indication of the status of the doors, lock motors and hatches
There are three contact breakers in the lock units in the side doors:
- contact breaker which indicates that the door is completely closed
- contact breaker to indicate that the central locking motor is in the locked position
- contact breaker which indicates that the child-proof lock motor is in its locked position (rear doors only).
The contact breakers are connected directly to the central electronic module (CEM) from all doors.
Contact breaker for central locking motor indication, and consequently contact breaker for child-proof lock motor, for the rear doors, are connected to their respective rear control module. The rear door control modules transmit the signal on to the relevant control module in the front doors which forward the signal to the central electronic module (CEM).
The signals are used to generate error messages and diagnostic trouble codes (DTCs) if a door is not properly closed when the vehicle is driven or if locking or unlocking of one or more doors has failed one or more times.
Note! There is no contact breaker for indicating an activated lock motor for deadlocks. The system only operates in the event of a change in status from the last position.
There is only one contact breaker in the lock unit in the tailgate/trunk lid. This indicates whether the tailgate/trunk lid is open or closed.
Unlocking, and locking (MY 2012-), remote
The service for remote unlocking of vehicles is available via Volvo On Call. If the remote keys have been locked in the car or lost, the customer can call a Volvo Service Center. The position of the vehicle is determined via a global positioning system module (GPS) in the Telematics system and is transmitted to the Volvo Service Center. The customer must provide a code to the Service Center, which then transmits a signal to the vehicle. This signal activates the central locking system for a certain amount of time. When instructed, the customer must activate the switch on the tailgate/trunk lid. If this is done, the car is unlocked.
From model year 2012 it is also possible to lock the vehicle from Volvo Service Center.
The function is market dependent.
Automatic locking when driving
Whether the automatic locking function is activated on delivery or not is market dependent. Settings can be changed via the menu in the Infotainment control module (ICM). If this function is activated, the side doors lock when the speed exceeds 7 km/h (5mph). All the doors must be closed, the engine running and the vehicle moving forward. The only exception is the tailgate/trunk lid which can be open. Information about whether the engine is running or not is transmitted by the engine control module (ECM) to the central electronic module (CEM). Indication about whether the engine is driving the car forwards is different in cars with automatic transmissions and manual transmissions. In vehicles with automatic transmissions, the position of the gear selector is received from the transmission control module (TCM). The gear selector must not be in the park (P) or neutral (N) position for automatic locking to function. In vehicles with manual transmissions, the brake control module (BCM) transmits information about vehicle speed to the central electronic module (CEM). The accelerator pedal (AP) must be partly pressed as well for automatic locking to take place.
The door can be unlocked again as normal using the central locking switches.
Automatic re-locking after unlocking
If the car is unlocked using the remote control key or "keyless entry" and the side doors or tailgate/trunk lid are not opened within 2 minutes, the vehicle will be relocked automatically. Whether this function is activated on delivery or not depends on the market. This function can be activated later via the diagnostic tool or the Infotainment control module (ICM).
Remote key warning
Remote key warning alerts the driver, by means of a text message and an audible acknowledgement signal, not to leave the remote key in the vehicle.
The central electronic module (CEM) receives an indication from a contact breaker in the lock unit that the driver's door is open. The contact breaker is directly connected to the central electronic module (CEM). If a remote key is in the starter module when the driver's door is opened and the engine is switched of the central electronic module (CEM) transmits a message via the controller area network (CAN) to the driver information module (DIM). The driver information module (DIM) then activates an audible acknowledgement signal and shows a warning message in the text display.
Passive remote key warning
Passive remote key warning alerts the driver that a validated remote key has been removed from the passenger compartment.
If a passive remote key has been validated and used to start the vehicle, the validation only applies until the vehicle is switched off. If the engine is running and a door is opened, the system will scan the passenger compartment for remote keys as soon as all doors are closed. If the remote key that was used to start the vehicle is not detected, a warning message will be displayed in the driver information module (DIM) and an audible signal heard. The system will scan for keys each time a door is opened and all doors are closed again or when the driver presses the READ button. The engine will not be switched off. However, the immobilizer system activates and blocks new start attempts as soon as the starter button is pressed in to switch off the engine.
"Comfort" functions
The Comfort Closing function can be activated from the remote key and from the central locking switch on one of the front doors. If the central electronic module (CEM) receives repeated lock signals, corresponding to a pressed lock button for approximately 2 seconds, it will lock all doors as well as closing the windows and sunroof.
The corresponding function (Comfort Opening) is available when unlocking the vehicle. If the central electronic module (CEM) receives repeated unlock signals, corresponding to a pressed unlock button for approximately 3 seconds, it will unlock all doors as programmed into the central locking system as well as opening all windows and sun roof.