GF80.61-P-2008CA Locking/Unlocking, Function
GF80.61-P-2008CA Locking/Unlocking, Function
- with CODE (889) Keyless Go
Function requirements, general
^ Valid transmitter key (A8/1) outside of vehicle (distance s < 1 m to one control)
^ Terminal 15C OFF
The electronic ignition lock control unit (N73) transmits circuit status 15 to the KEYLESS-GO control unit (N69/5) via the interior CAN (CAN B).
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)
- To unlock:
Trunk lid external operation switch (S88/8)
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 (model 207.3 as of 1.6.10 and model 207.4)
^ Function sequence for visual locking feedback
^ Function sequence for unlocking trunk lid
The sensor units in the KEYLESS-GO door handles are switched off when c. 15 is switched on. The sensors are activated when the circuit 15 is switched off and a door is opened. The capacitor sensor in the KEYLESS-GO door handles 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 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. 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.
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:
- Gripping any KEYLESS GO door handle (global or selective opening) or
- 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)
The inner capacitor recognizes if the left front door KEYLESS-GO door handle is gripped. The KEYLESS-GO control unit reads in the signal of the inner capacitor and transmits a wake-up signal to the transmitter key via the left front door KEYLESS-GO antenna (A2/38).
The transmitter key transmits its access authorization code and position to the KEYLESS-GO control unit via the following components:
- TV 2 and KEYLESS-GO antenna amplifier (A94/2) (model 207.3)
- Rear KEYLESS-GO antenna (A97) (model 207.4)
The description of the rear KEYLESS-GO antenna is given in the separate description for 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. It is not defined as valid, it transmits the request "Open CL" via the interior CAN to the following control units:
- 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)
- Right front door control unit (N69/2)
The corresponding control units cause the following components to unlock:
- Left front door lock (A85)
- Right front door lock (A85/1)
- Trunk lid central locking motor (M14/7)
- Tank cap central locking motor (M14/10)
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 Model 207.3 as of 1.6.10 and model 207.4)
The acoustic feedback can be selected and activated in the instrument cluster (A1) over the left multifunction steering wheel button group (S110). The steering column tube module control unit (N80) reads in the control signals for the left multifunction steering wheel button group via the steering wheel electronics (N135) and transmits this to the instrument cluster via the chassis-CAN (CAN E). The status of the acoustic locking feedback is transmitted by the instrument cluster to the front SAM control unit via the interior CAN.
If the acoustic feedback function is activated and the successful locking and unlocking, an acoustic feedback is output by momentarily actuating the left horn (H2) and right horn (H2/1).
When the transmitter key is valid and the acoustic feedback is activated, the electronic ignition lock control unit transmits the command "Lock or unlock" to the front SAM control unit via the interior CAN.
The front SAM control unit momentarily actuates the horns via the horn relays (N10/1kO).
Number of acoustic signals:
- Locking: three signals
- Unlocking: one signal
If a door is still open when locking, there is no acoustic feedback.
On model 207.3 up to 31.5.10 with code (494) USA version, the locking feedback is realized via the alarm siren (H3/1).
Function sequence for visual 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 is controlled by the front SAM control unit, transmitting the turn signal as blinkmaster via the interior CAN.
Number of visual signals
- Locking: three signals
- Unlocking: one signal
If a door is still open when locking, there is no visual feedback.
Detailed information for exterior lights is given in the separate description.
Function sequence for unlocking trunk lid
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 actuates the trunk KEYLESS-GO antenna (A2/35), which transmits a wake-signal to the transmitter key
The transmitter key transmits its access authorization code and position to the KEYLESS-GO control unit via the following components:
- TV 2 and KEYLESS-GO antenna amplifier (model 207.3)
- Rear KEYLESS-GO antenna (model 207.4)
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" to the rear SAM control unit via the interior CAN. The rear SAM control unit enables the signal from the external operation switch and opens the trunk lid by actuating the trunk lid central locking motor.
