Brief description of components

The following components supply an input signal for the central locking system:

• Driver's door lock cylinder 

  The driver's door lock cylinder allows manual locking/deadlocking and unlocking of the vehicle. If the vehicle's electrical system fails, the driver's door can be unlocked manually using the ignition key.

• Interior boot lid pushbutton in the driver's footwell 

  The interior boot lid pushbutton allows the boot lid to be opened while the vehicle is stationary (terminal R OFF).

• Central locking button 

  The central locking button allows the vehicle to be locked/unlocked from the passenger compartment. The fuel filler flap is not locked.

• Remote control 

  The remote control allows the vehicle to be locked/deadlocked via radio (aerial interface). The radio signals from the remote control are received by the FBD receiver (receiver for remote control) and transferred to the CAS control unit.

• Lock cylinder on the boot lid 

  The boot lid lock cylinder allows the boot lid to be opened manually (E60, E63, E64 only).

  On the E60 the hotel position is also applied via the lock cylinder.

  On the E63/E64 the hotel position is applied in the rear stowage compartment in the center console (hotel position switch). This means that, in addition to the boot lid, the front stowage compartment can also be uncoupled from the central locking system.

• External boot lid pushbutton 

  The external boot lid pushbutton allows the boot lid to be opened while the vehicle is unlocked and stationary (hotel position not applied).

  Via the BMW badge on the E63/E64.

• Rear window switch (E61 only) 

  The rear window switch allows the rear window to be opened while the vehicle is unlocked and stationary (hotel position not applied). The rear window switch is integrated in the rear window wiper.

• Door contacts 

  The signals from the door contacts are analyzed by different systems.

  For example, the anti-theft alarm DWA requires the signals to monitor the doors.

The following control units are involved in the central locking system:

• CAS: Car Access System 

  All the rules for controlling the central locking are integrated in the Car Access System. The commands are transferred by the CAS control unit via the K-CAN.?

• SGM: Safety and gateway module 
  • up to 09/2005

  The safety and gateway module (SGM) forms the bus interface between K-CAN and byteflight.

• TMFA and TMBF: Driver's door module and front passenger door module 
  • up to 09/2005

  The door modules are a component of the passive safety system ASE (= Advanced Safety Electronics). The door modules control the central locking system for the front doors.

• KGM: Body gateway module 
  • from 09/2005

  The door modules and the byteflight  are discontinued.

  The body gateway module (KGM) actuates the central locking in the front doors. Moreover, the KGM is the central gateway to the bus system.

• Body basic module 

  The body basic module (KBM) controls the central locking system on the rear doors (not on the E63, E64). It also controls the central locking drives on the fuel filler flap, the boot lid and the rear window (E61).

The following actuators are controlled by the central locking system:

• Motors in the door locks 

  There are 2 motors in each door lock. The locking mechanism can be brought into the following position by the motors:

  • Lock: Door can still be opened from the inside
  • Deadlock: Door cannot be opened from the inside or from the outside
  • Unlock: Door can be opened from the inside and outside
• Motor for the fuel filler flap 

  The motor locks/unlocks the fuel filler flap.

• Motor for the boot lid lock 

  The motor locks/unlocks the boot lid.

  It is not possible to operate the central locking system via the boot lid lock.

  The boot lid can only be unlocked manually via the boot lid lock.

  On the E61 the boot lid lock is supported by an automatic soft-close mechanism.

• Motor for the rear window (E61 only) 

  The motor locks/unlocks the rear window.

  At the same time, the body basic module controls the locking/unlocking of the luggage compartment cover blind (1 motor each on the left and right D-pillar).