GF80.20-P-0005RC Central Locking (CL), Function

GF80.20-P-0005RC Central Locking (CL), Function

Central locking (CL), general
The CL electrically locks and unlocks the vehicle doors, the trunk lid, the fuel filler flap, the glove box and the center console compartment.

The following controls are available:
- Transmitter key (A8/1)
- 'Unlock CL [ZV]' interior switch (N72/1s16)
- Lock CL [ZV] interior switch and ATA [EDW] function indicator (N72/1s17)
- Trunk lid contact switch (S88/6) (with code (887) Valet Parking)
- Trunk lid external operation switch (S88/8)
- Trunk lid emergency release switch (S88/10) (for code (494) USA version)

The CL comprises the following partial functions:
^ Function sequence for emergency opening in event of crash
^ Function sequence for locking trunk lid via trunk lid contact switch (with code (887) Valet Parking)

Further partial functions are described in separate documents:
^ Central locking, operation with transmitter key
^ Locking / unlocking vehicle with interior switch
^ Automatic locking

Additional function requirements for emergency opening in event of crash
^ Vehicle is locked

Function sequence for emergency opening in event of crash
The emergency opening function unlocks the doors of the vehicle in the event of a crash. The rear SAM control unit with fuse and relay module (N10/2) transmits the request for emergency opening to the left door control unit (N69/1) and right door control unit (N69/2) via interior CAN. After a waiting time of t = 8 to 11 s, the doors are unlocked.

The emergency opening function overrides all other central locking functions in the event of a crash. When the vehicle has been locked from the outside, the emergency opening function is not active in the event of crash.

Function sequence for locking trunk lid via trunk lid contact switch
The function locking trunk lid via trunk lid contact switch serves to lock objects in the trunk. The trunk lid contact switch can be actuated with the emergency key in the transmitter key. It no longer possible to open the trunk lid. The trunk lid contact switch is read in by the rear SAM control unit.