GF80.61-P-2008RI Locking/Unlocking, Function

GF80.61-P-2008RI Locking/Unlocking, Function
- with CODE (889) Keyless Go


Locking/unlocking, general
Locking/unlocking allows the vehicle to be opened and closed.

The locking/unlocking functions comprise the following subfunctions:
^ Function sequence for preadjustment of unlocking mode
^ Function sequence for unlocking door
^ Function sequence for unlocking trunk lid
^ Function sequence for locking vehicle
^ Warning message function sequence

Function sequence for preadjustment of unlocking mode
If the unlock and lock buttons on the transmitter key (A8/1) 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 models of unlocking are possible:
- Global unlocking:
The entire vehicle is unlocked.
- Selective unlocking (only possible on driver door):
Only the driver door and the fuel filler flap are unlocked. If the transmitter key is set to selective unlocking and the triggering location for unlocking is not the driver door, the vehicle is unlocked globally.

Additional function requirements for unlocking door:
^ C. 15C OFF (No transmitter key inserted into EIS control unit (N73))
^ A valid transmitter key is located outside the vehicle (max. approx. s = 1 m distance to left door KEYLESS-GO antenna (A2/38) or right door KEYLESS-GO antenna (A2/40))

Function sequence for unlocking door
Reaching into the door handle is recognized by the
- left door capacitive sensor (S47b1) or
- right door capacitive sensor (S48b1) whereby the Keyless Go system is woken up

The KEYLESS-GO control unit (N69/5) wakes up the transmitter key via the left Keyless-Go door antenna or right Keyless-go door antenna and causes it to transmit its access authorization code..

This access authorization code is received by the rear KEYLESS-GO antenna (A97) and relayed to the EIS control unit via KEYLESS-GO control unit.
If the access authorization is valid, the KEYLESS-GO control unit actuates the left door KEYLESS-GO lift solenoid (L12) or right KEYLESS-GO lift solenoid (L12/2) for quick unlocking, because unlocking the corresponding door via the pneumatic controller unit with combined function (A37) would take too long.
Simultaneously, however, the EIS control unit transmits the command "Unlock central locking (CL)" to the pneumatic controller unit unlocking the vehicle globally or selectively, depending on the setting of the transmitter key.
Successful unlocking is indicated by momentarily actuating the warning flasher function.

The left door capacitive sensor and right door capacitive sensor are switched off approx. 72 h after the last component is locked to save the on-board electrical system battery (G1).
Afterwards it is not possible to unlock the vehicle by simply reaching into a door handle. To unlock actuate left door pull contact microswitch (S47s1) or right door pull contact microswitch (S48s1).

Additional function requirements for unlocking trunk lid
^ Circuit 15C Off (no transmitter key inserted into EIS control unit)
^ A valid transmitter key is located outside the vehicle (max. approx. s = 1 m distance to left trunk KEYLESS-GO antenna (A2/35))
^ Trunk lid not locked via trunk lid locking switch (S134) (with code (887) Valet Parking)

Function sequence for unlocking trunk lid
The trunk lid external operation switch (S88/8) is actuated by pulling the trunk lid handle. This is recognized by the pneumatic controller unit which relays an unlocking request to the Keyless Go control unit.
The keyless go system is woken up.

The KEYLESS-GO control unit wakes up the transmitter key via the left trunk KEYLESS-GO antenna and transmits its access authorization code.
This authorization code is received by the rear KEYLESS-GO antenna and is relayed to the EIS control module via the KEYLESS-GO control unit.
The EIS control unit transmits the command "Unlock trunk lid" to the pneumatic controller unit, unlocking the trunk lid pneumatically.

On vehicles with code (881) Remote trunk closing (RTC [HDFS]), the trunk lid is then opened hydraulically via the RVC [UVS] control unit (N52). See separate function description "Remote trunk closing (RTC [HDFS])".

The status of the trunk lid is recognized by the rear SAM control unit (N10/8) via the lock pawl rotary tumbler switch (S88/4).

Additional function requirements for locking vehicle
^ Circuit 15C Off (no transmitter key inserted into EIS control unit)
^ A transmitter key is located outside the vehicle (max. approx. s = 1 m distance to left door KEYLESS-GO antenna or right door KEYLESS-GO antenna)
^ Doors and trunk lid closed

Function sequence for locking vehicle
Actuation of the left door push contact (S47s2) or right door push contact (S48s2) is read in by the KEYLESS-GO control unit. It then wakes up the transmitter key via the left door KEYLESS-GO antenna or right door KEYLESS-GO antenna and requests it to transmits its access authorization code.
This authorization code is received by the rear KEYLESS-GO antenna and is relayed to the EIS control module via the KEYLESS-GO control unit.
If the access authorization code is valid, the EIS control unit transmits the "Lock" command to the pneumatic controller unit which then locks the vehicle.

If the trunk lid is open when a door is locked, only the doors are locked. Visual feedback is not performed. If the trunk lid is then closed, it is also locked followed by visual feedback.

On vehicles with code (881) Remote trunk closing (RTC HDFS]), the trunk lid can first be closed hydraulically with the RTC HDFS] button (S62/26) via the RVC [UVS] control unit and then the vehicle locked. See separate function description "Remote trunk closing (RTC [HDFS])".

Warning message function sequence
If an attempt is made to lock the vehicle, as long as no transmitter key is outside the vehicle, or one of the doors is still open, the vehicle is not locked. The fault message "Check doors" and a door system are indicated in the instrument cluster (A1).