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Standard Central Locking System: Signals

The tables below summarize the input and output signals to the units in the central locking system. The signal types are divided into directly connected signals, serial communication and controller area network (CAN) communication.

CENTRAL ELECTRONIC MODULE (CEM) (4/56):

Input signals Output signals
Directly connected:  Directly connected: 
  • Switch for valet locking.
  • High/low beam switch for activating the approach lights on the steering wheel module (SWM)
  • Switch unlock tailgate, indication that handle is pressed in (XC70 (08-)).
  • Contact breaker in lock unit, driver's door, for indicating open door.
  • Contact breaker in lock unit, passenger door, for indicating open door.
  • Contact breaker in lock unit, right-hand rear door, for indicating open door.
  • Contact breaker in lock unit, left-hand rear door, for indicating open door.
  • The switch in the tailgate lock unit indicates whether the lock unit is locked or not.
  • Contact breaker, hood, for indicating open hood (for vehicles with alarm).
  • Signal for unlocking from the supplemental restraint system module (SRS) if the airbags are triggered.
  • Lock motor, tailgate, for activating motor.
  • Lock motor for the fuel tank filler cover
Via serial communication:  Via serial communication: 
  • Remote Receiver Module (RRX)
  • Light switch module (LSM), switch for unlocking the tailgate.
  • Light switch module (LSM), switch for opening the fuel tank filler cover.
  • Remote Receiver Module (RRX)
Via Controller Area Network (CAN) communication:  Via Controller Area Network (CAN) communication: 
  • Infotainment control module (ICM) for customer adaptation
  • The driver door module (DDM) for locking and unlocking commands and for information about the lock motor's position (in certain cases).
  • The passenger door module (PDM) for locking and unlocking commands and for information about the lock motor's position (in certain cases).
  • Engine control module (ECM) for information about the status of the engine
  • Brake control module (BCM) for information about vehicle speed
  • Transmission control module (TCM), indicates the position of the gear selector.
  • The climate control module (CCM) for information about activation and deactivation of the deadlocks.
  • Power Operated Tailgate Module (POT).
  • Infotainment control module (ICM) for customer adaptation
  • Driver door module (DDM) for locking and unlocking commands
  • Passenger door module (PDM) for locking and unlocking commands
  • Phone module (PHM) for unlocking via the Volvo On Call service.
  • Power Operated Tailgate Module (POT).
  • Driver information module (DIM) for text messages.
NOTE:

The market in Japan has Remote Keyless Entry (RKE) for model year 2008-2009 regardless of whether 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).

DRIVER DOOR MODULE (DDM) (3/126):

Input signals Output signals
Directly connected:  Directly connected: 
  • Indication of locked mode from the central locking motor.
  • Central locking switch.
  • Output signal to central locking motor.
  • Output signal to lock motor for deadlock mode.
  • Output signal to both central locking motors and deadlocking when unlocking.
Via serial communication:  Via serial communication: 
  • Serial communication (LIN) with the rear door control module, on the same side, with the status of certain lock motors.
  • Serial communication (LIN) with switch child-proof lock.
  • Serial communication (LIN) with the rear door control module on the same side for the lock and unlock commands.
Via Controller Area Network (CAN) communication:  Via Controller Area Network (CAN) communication: 
  • Central electronic module (CEM) for locking and unlocking commands.
  • Central electronic module (CEM) for status information about the position of certain lock motors.
PASSENGER DOOR MODULE (PDM) (3/127):

Input signals Output signals
Directly connected:  Directly connected: 
  • Indication of locked mode from the central locking motor.
  • Central locking switch.
  • Output signal to central locking motor.
  • Output signal to lock motor for deadlock mode.
  • Output signal to both central locking motors and deadlocking when unlocking.
Via serial communication:  Via serial communication: 
  • Serial communication (LIN) with the rear door control module, on the same side, with the status of certain lock motors.
  • Serial communication (LIN) with the rear door control module on the same side for the lock and unlock commands.
Via Controller Area Network (CAN) communication:  Via Controller Area Network (CAN) communication: 
  • Central electronic module (CEM) for locking and unlocking commands.
  • Central electronic module (CEM) for status information about the position of certain lock motors.
DRIVER INFORMATION MODULE (DIM) (5/1):

Input signals Output signals
Via Controller Area Network (CAN) communication:  Via Controller Area Network (CAN) communication: 
  • Information about whether the information lamp or warning lamp must be lit
  • Information about which text message must be displayed.
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PHONE MODULE (PHM) (16/60) (OPTION):

Input signals Output signals
Via Controller Area Network (CAN) communication:  Via Controller Area Network (CAN) communication: 
  • Central electronic module (CEM) for remote unlocking via the Volvo On Call service.
  • Central electronic module (CEM) for remote unlocking via the Volvo On Call service.

Power Operated Tailgate Module (POT) (4/116) (option): 

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