GF80.61-P-2008FL Locking/Unlocking, Function
GF80.61-P-2008FL Locking/Unlocking, Function
- with CODE (889) Keyless Go
Function requirements, general
^ Valid transmitter key (A8/1) outside the vehicle (maximum of approx. 1 m distance to a control)
^ Terminal 15C OFF
The electronic ignition lock control unit (N73) transmits the circuit status of circuit 15 via the body CAN (CAN B) to the KEYLESS-GO control unit (N69/5).
Locking/unlocking, general
The central locking (CL) can opened and closed with the locking/ unlocking function.
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 unlock:
- Trunk lid external operation switch (S88/8) model 212.0)
- Liftgate lid external operation switch(S88/8) (model 212.2)
The locking/unlocking functions comprise the following subfunctions:
^ Function sequence for preadjustment of unlocking mode
^ Function sequence for locking/unlocking one vehicle door
^ Function sequence for acoustic locking feedback (as of 1.6.10)
^ Function sequence for optical locking feedback
^ Function sequence for unlocking trunk lid (model 212.0) or liftgate (model 212.2)
The sensor units in the KEYLESS-GO door handles are switched off when circuit 15 is switched on. Activation takes place when circuit 15 is switched off and then a door is opened. In order to preserve the life of the on-board electrical system battery (G1), the capacitive sensor on vehicles up to 31.5.10 is switched off in the KEYLESS-GO door handles after t = 72 h.
On vehicles up to 31.5.10 after switching off, the vehicle can no longer be unlocked by mere intervention (detected by the capacitive sensor) in the KEYLESS-GO door handle. The KEYLESS GO door handle must be pulled.
On vehicles as of 1.6.10 the capacitive sensors are put into current saving mode, in other words "sampling cycle time" of the capacitive sensors increases, the power consumption decreases.
Function sequence for preadjustment of unlocking mode
Basically the following types of unlocking are differentiated:
- 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.
Simultaneously pressing the lock/unlock buttons on the transmitter key for t = 5 s, switches the system between two types of unlocking. The LED on the transmitter key comes on to confirm this change.
Function sequence for locking/unlocking one vehicle door
Variant unlocking:
- Intervention into any KEYLESS-GO door handle (global or selective unlocking)
- Pulling any KEYLESS GO door handle (global or selective opening)
Variant locking:
- Touching outside of KEYLESS GO door handle or
- actuating convenience sensor on KEYLESS GO door handle
Unlocking (example global unlocking at left front door)
When the left front KEYLESS-GO is held, the capacitive sensor in the door handle recognizes this. The KEYLESS-GO control unit reads in the signal from the capacitive sensor and transmits a wake-up signal to the transmitter key via the left rear door KEYLESS-GO antenna (A2/39).
The transmitter key transmits its access authorization code and its position via the antenna amplifier FM 1, AM, ZV and KEYLESS- GO (A2/18) to the KEYLESS-GO control unit.
The KEYLESS-GO control transmits this data to the electronic ignition lock control unit via the interior CAN.
The electronic ignition lock control unit checks the access authorization code of the transmitter key; if it is defined as valid, it transmits the request "Open CL" via the interior CAN to the following control units:
- Rear SAM control unit with fuse and relay module (/)N10/2
- Left front door control unit (/)N69/1
- Right front door control unit (/)N69/2
- Left rear door control unit (/)N69/3
- Right rear door control unit (/)N69/4
The corresponding control units cause the following components to unlock:
- Left front door lock (A85)
- Right front door lock (A85/1)
- Left rear door lock (A85/3)
- Right rear door lock (A85/4)
- Trunk lid central locking motor (M14/7) (model 212.0)
- Liftgate central locking motor (M14/7) (model 212.2)
- Tank cap central locking motor (M14/10)
The status of the left rear door rotary tumbler switch (A85/3s1) and the right rear door rotary tumbler switch (A85/4s1) is read in directly by the rear SAM control unit.
The external operation switch is enabled to unlock the trunk lid or the liftgate by the rear SAM control unit.
Function sequence for acoustic locking feedback (as of 1.6.10)
The acoustic locking feedback can be selected and activated in the IC (A1) via the left multifunction steering wheel button group (S110). The control signals from the left multifunction steering wheel button group are read in by the steering wheel electronics (N135) via the steering LIN (LIN E1) from the steering column tube module control unit (N80) which passes on the control signals via the chassis CAN (CAN E) to the IC.
The IC transmits the status of the acoustic locking feedback via the body CAN to the front SAM control unit with fuse and relay module (N10/1).
If the function of acoustic locking feedback has been activated, after successful locking or unlocking an acoustic feedback takes place after brief actuation of the left horn (H2) and right horn (H2/1).
With a valid transmitter key and activated acoustic locking feedback the electronic ignition lock control unit transmits the command "Lock or unlock" via the body CAN to the front SAM control unit. As a result of this the front SAM control unit actuates the horns briefly via the horns relay (N10/1kO).
Number of acoustic signals:
- Locking: three times
- Unlocking: once'
If a door or liftgate is still opened when locking, no acoustic locking feedback takes place.
Function sequence for optical locking feedback
After successfully locking or unlocking, the following components provide visual feedback:
- Left turn signal indicator lamp (A1e1)
- Right turn signal indicator lamp (A1e2)
- Left front turn signal lamp (E1e5)
- Right front turn signal lights (E2e5)
- Left rear turn signal lights (E3e1)
- Right rear turn signal lights (E4e1)
- Left outside mirror turn signal lamp (E6/5)
- Right outside mirror turn signal lamp (E6/6)
The function of optical locking feedback is controlled by the front SAM control unit which as "Blinkmaster" transmits the signal for flashing via the body CAN.
Number of optical signals:
- Locking: three times
- Unlocking: once
If a door or liftgate is still opened when locking, no optical locking feedback takes place.
Detailed information on exterior lights can be found in the separate description.
Function sequence for unlocking trunk lid or liftgate
The rear SAM control units reads in the status of the external operation switch and transmits it to the KEYLESS-GO control unit via the interior CAN.
When the external operation switch is pressed, the KEYLESS-GO control unit transmits (A2/35) a wake-up signal to the transmitter key via the luggage compartment KEYLESS-GO antenna.
The transmitter key transmits its access authorization code and its position via the antenna amplifier FM 1, AM, ZV and KEYLESS-GO to the KEYLESS-GO control unit.
The KEYLESS-GO control transmits this data to the electronic ignition lock control unit via the interior CAN.
The electronic ignition switch control unit checks the access authorization of the transmitter key.
If it is defined as valid, it transmits the request "Unlock trunk lid or liftgate" to the rear SAM control unit via the interior CAN.
The rear SAM control unit enables the signal for the external operation switch and disables the trunk lid or the liftgate.
On vehicles with code (551) Anti-theft alarm (ATA), the antitheft alarm (ATA) is activated or deactivated with each type of locking or unlocking.
