GF80.61-P-2008LE Locking/Unlocking, Function
GF80.61-P-2008LE Locking/Unlocking, Function
- with CODE (889) Keyless Go
Function requirements, general
^ Valid transmitter key (A8/1) outside of vehicle (maximum distance to one of the controls s = 1 m)
^ C. 15C OFF
Locking/unlocking, general
Locking/unlocking allows the vehicle to be opened and closed.
The following control elements are available:
To lock and unlock:
- Left KEYLESS-GO sensor unit (B67/1) (model 216)
- Left front KEYLESS-GO sensor unit (B67/1) (model 221)
- Right KEYLESS-GO sensor unit (B67/2) (model 216)
- Right front KEYLESS-GO sensor unit (B67/2) (model 221)
- Left rear Keyless-Go sensor unit (B67/3) (model 221)
- Right rear Keyless-Go sensor unit (B67/4) (model 221)
To unlock:
- Trunk lid external operation switch (S88/8)
To lock:
- TLC button (S62/26) (model 221 with code (881) Remote trunk closing (RTC), model 216)
The locking/unlocking functions comprise the following subfunctions:
^ Function sequence for preadjustment of unlocking mode
^ Function sequence for globally unlocking driver door
^ Function sequence for locking driver door
^ Function sequence for unlocking trunk lid
^ Closing and locking trunk lid (model 221 with code (881) Remote trunk closing (RTC), model 216)
The sensor units 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 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 sensor unit (recognized by the inner capacitive sensor).
The sensor unit must be pulled
Function sequence for preadjustment of unlocking mode
If the unlock button and the lock button on the transmitter key are pressed simultaneously for t = 5 s, the unlocking mode is changed. The LED on the transmitter key comes on twice to confirm this change.
The following types of unlocking are possible:
- Global unlocking:
The entire vehicle is unlocked gripping and pulling a sensor unit.
- Selective unlocking (only possible on driver door):
Only the driver door and the fuel filler flap are unlocked by gripping and pulling the sensor unit on the driver door. If the transmitter key is set to selective unlocking and the triggering location for unlocking is not the driver door sensor unit, the vehicle is unlocked globally.
Unlocking possibilities:
- Gripping any sensor unit (global or selective opening) or
- gripping or pulling any sensor unit (global or selective opening)
Locking possibilities:
- Touching outside of sensor unit or
- Actuating comfort sensor on sensor unit
Function sequence for globally unlocking driver door
If the sensor unit on the driver door is gripped, this is recognized by the inner capacitive sensor.
This signal is read in by the KEYLESS-GO control unit (N69/5). The KEYLESS-GO control then actuates the left door KEYLESS- GO antenna (A2/39) (model 216) or left rear door KEYLESS-GO antenna (A2/39) (model 221), which transmits a wake-up signal to the transmitter key.
The transmitter key transmits its access authorization code and its position to the rear window antenna amplifier module (A2/12), which relays the data to the KEYLESS-GO control unit. The KEYLESS-GO control unit relays the access authorization code to the EIS control unit (N73) via the interior CAN.
If the access authorization code is valid, the EIS control unit transmits the command "Open central locking" to the:
- Rear SAM control unit with fuse and relay module (N10/2)
- Left door control unit (N69/1) (model 216)
Left front door control unit (N69/1) (model 221)
- Right door control unit (N69/2) (model 216), Right front door control unit (N69/2) (model 221)
- Left rear door control unit (N69/3) (model 221)
- Right rear door control unit (N69/4) (model 221)
They then unlock the following components:
- Left door lock unit (A85) (model 216) or Left front door lock unit (A85) (model 221)
- Right door lock unit (A85/1) (model 216) or Right front door lock unit (A85/1) (model 221)
- Left rear door lock unit (A85/3) (on model 221)
- Right rear door lock unit (A85/4) (on model 221)
- Trunk lid central locking motor (M14/7)
- Fuel filler flap CL [ZV] motor (M14/10)
The external operation switch is enabled to unlock the trunk lid by the rear SAM control unit. If the driver door sensor unit is pulled within t = 0.5 s after the central locking is unlocked, this is sensed by the Hall sensor in the driver door sensor and transmitted to the KEYLESS-GO control unit. The latter then actuates the left front opening assist motor (A85m2) (model 221) or left opening assist motor (A85m2) (model 216).
When the opening assist motor is actuated, the rotary tumbler "Opens" and the door pops open.
Function sequence for locking driver door
The outer capacitive sensor in the driver door sensor unit recognizes if a door handle is gripped from the outside.
The further function sequence is performed analog to global unlocking described previously. However, the opening assist motor is not actuated.
Function sequence for unlocking trunk lid
The rear SAM control unit recognizes when the trunk lid 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 transmits its access authorization code and its position to the rear window antenna amplifier module, which relays the data to the KEYLESS-GO control unit.
The KEYLESS-GO control unit relays the access authorization code to the EIS control unit via the interior CAN.
The access authorization code is valid, the EIS control unit transmits the command "Unlock" to the rear SAM control unit. It enables the signal for the external operation switch and disables the trunk lid.
Closing and locking trunk lid
Actuation of the TLC button is recognized by the TLC control unit (N121) and relayed to the KEYLESS-GO control unit via the interior CAN.
The further function sequence is performed analog to unlocking described previously. However, the trunk lid is closed hydraulically before it is locked by the TLC control unit.
The precise sequence is described in the function "Remote trunk closing (RTC)".
On vehicles with code (551) Anti-theft alarm (ATA), the antitheft alarm (ATA) is activated or deactivated with each type of locking or unlocking.
