GF80.61-P-2008CW Locking/Unlocking, Function
GF80.61-P-2008CW Locking/Unlocking, Function
- with CODE (889) Keyless Go
The following control elements are available: To lock and unlock:
^ Left front KEYLESS GO door handle (A17/1)
^ Right front KEYLESS GO door handle (A17/2)
^ Left rear KEYLESS GO door handle (A17/3)
^ Right rear KEYLESS GO door handle (A17/4)
To lock:
^ Tailgate control button (S62/36) (with code (890) Automatic rear-end door)
To unlock:
^ Trunk lid external operation switch (S88/8) (model 204.0) or tailgate external operation switch (S88/8) (model 204.2)
Function requirements
^ Valid transmitter key (A8/1) outside of vehicle (maximum approx. distance of 1 m to one control)
^ Circuit 15C OFF
^ Keyless Go system (KG) functioning
All sensors in the KEYLESS GO door handles are switched off when switching on circuit 15. The sensors are activated when the circuit 15 is switched off and a door is opened.
The inner capacitive sensor is switched off after t = 72 h to save the on-board electrical system battery (G1).
After switching off, the vehicle can no longer be unlocked by touching the KEYLESS GO door handle (recognized by the inner capacitive sensor). The KEYLESS GO door handle must be pulled.
Function sequence for locking/unlocking:
The general function sequence consists of several subfunctions. These are:
^ Presetting for type of unlocking
^ Lock/unlock vehicle door
^ Unlock trunk lid (model 204.0)/tailgate (model 204.2)
^ Close and lock tailgate (with code (890) Automatic rear-end door)
Presetting for type of unlocking
If the unlock and lock buttons on the transmitter key are actuated simultaneously for t = 5 s, the locking mode is changed. The LED on the transmitter key comes on to confirm this change.
The following types of unlocking are possible:
^ Global unlocking:
The entire vehicle can be unlocked by gripping and pulling a KEYLESS GO door handle.
^ Selective unlocking (only possible on driver door):
Only the driver door and the fuel filler flap are unlocked by gripping and pulling the left front KEYLESS GO door handle. If the transmitter key is set to selective unlocking and the triggering location for unlocking is not the left front KEYLESS GO door handle, the vehicle is unlocked globally.
Lock/unlock vehicle door
Unlocking possibilities:
^ Gripping any KEYLESS GO door handle (global or selective opening) or
^ Gripping and pulling any KEYLESS GO door handle (global or selective opening) or
Locking possibilities:
^ touching outside of KEYLESS GO door handle or
^ actuating convenience sensor on KEYLESS GO door handle
Function sequence when unlocking
(Global unlocking described for left front door)
The inner capacitive sensor recognizes if the left front KEYLESS GO door handle is gripped.
This signal is read in by the KEYLESS GO control unit (N69/5). The KEYLESS GO control unit then actuates the left rear door KEYLESS GO antenna (A2/39), which transmits a wakeup signal to the transmitter key.
The transmitter key transmits its access authorization code and its position to TV 2 and KEYLESS GO antenna amplifier (A94/2), which relays the data to the KEYLESS GO control unit. The KEYLESS GO control unit transmits the access authorization code to the electronic ignition lock control unit (N73) via interior CAN.
If the access authorization code is valid, the electronic ignition lock control unit transmits the command "Open central locking (CL)" to the front SAM control unit with fuse and relay module (N10/1), rear SAM control unit with fuse and relay module (N10/2), left front door control unit (N69/1) and right front door control unit (N69/2).
They then unlock the following components:
^ Left front door lock (A85)
^ Left front door lock (A85)
^ Left rear door lock (A85/3)
^ Right rear door lock (A85/4)
^ Tank cap with tank cap central locking motor (M14/10)
The external operation switch is enabled to unlock the trunk lid or the tailgate by the rear SAM control unit.
If the left front KEYLESS GO door handle is pulled within t = 0.5 s after opening the CL, this is sensed by the Hall sensor in the left front KEYLESS GO door handle and signaled to the KEYLESS GO control unit, which then actuates the left front door opening assist motor (A85m2). When the left front door opening assist motor is actuated, the rotary tumbler "Opens" and the door pops open.
Function sequence when locking Shown on left front door as an example)
The outer capacitive sensor in the left front KEYLESS GO door handle recognizes if a door handle is gripped from the outside. All other function sequences are performed as described previously for "Unlocking".
The comfort closing function via KG is described in the Convenience feature function".
Unlocking trunk lid/tailgate
Function sequence
The rear SAM control unit recognizes when the external operation switch is actuated and signals it to the KEYLESS GO control unit via interior CAN.
The KEYLESS GO control unit then actuates the luggage compartment KEYLESS GO antenna (A2/35), which transmits a wakeup signal to the transmitter key.
The transmitter key sends its access authorization code and its position to TV 2 and KEYLESS GO antenna amplifier, which relays the data to the KEYLESS GO control unit. The KEYLESS GO control unit transmits the access authorization code to the electronic ignition lock control unit via interior CAN. If the access authorization code is valid, the electronic ignition lock control unit sends the command "Unlock" to the rear SAM control unit. It enables the signal for the external operation switch and disables the trunk lid or the tailgate.
On vehicles with code (551) Anti-theft alarm (ATA), the antitheft alarm (ATA) is activated or deactivated with each type of locking or unlocking.
Closing and locking tailgate
The rear SAM control unit recognizes when the tailgate control button is actuated and is relayed to the KEYLESS GO control unit via interior CAN.
All other function sequences are performed as described previously for "Locking". However, the tailgate is closed electronically via the tailgate control unit (N121/1) before locking.
The entire sequence is described in the separate function "Remote trunk closing (RTC)".
