GF80.20-P-4009GM Automatic Locking, Function

GF80.20-P-4009GM Automatic Locking, Function

Automatic locking, general
The vehicle is automatically locked under certain conditions.

The automatic locking function comprises the following partial functions:
^ Function sequence for locking, depending on vehicle speed
^ Function sequence for automatic relocking

Additional function requirements for locking depending on vehicle speed
^ Central locking (CL) unlocked and
^ Function activated via the instrument cluster (A1)

Function sequence for locking, depending on vehicle speed
The vehicle is locked depending on the vehicle speed:
^ Vehicle speed v > 3 km/h
- Locking tailgate

^ Vehicle speed v > 15 km/h
- Additional locking of doors

The EIS control unit (N73) recognizes if the limit values are exceeded by evaluating the speed signals from the instrument cluster and transmits the command "Lock" to the:
- Front SAM control unit (N10)
- Rear SAM control unit (N10/8)
- Left front door control unit (N69/1)
- Right front door control unit (N69/2)

They then cause the following to be locked:
- Right front door CL motor (M14/5)
- Left front door CL motor (M14/6)
- Left rear door CL motor (M14/8)
- Right rear door CL motor (M14/9)

The rear SAM control unit enables or inhibits opening the tailgate with the rear-end door handle switch (S88/9) or folding out the spare tire carrier with the spare tire carrier control button (S151/3) (with code (849) Spare tire holder/spare tire).

The vehicle can be unlocked again by opening one of the doors from the inside or with the left interior CL switch (S85/5) or right interior CL switch (S85/6).

If the vehicle is unlocked with the CL inside door handle switches, it also remains unlocked at speeds above the corresponding limit. The vehicle is returned to the initial state when one of the doors is opened or circuit 15 is switched on and off again.
If a door is opened while driving and then closed again, and the vehicle speed is above the limit for automatic locking, the door is locked again after it is closed.

Additional function requirements for automatic relocking
^ CL unlocked with transmitter key (A8/1)

Function sequence for automatic relocking
After the vehicle is unlocked with the transmitter key, a waiting time of t = 40 s starts.
After expiration of this waiting time, the vehicle is relocked if a door or the tailgate has not been opened previously.
Visual feedback is not performed.

The anti-theft alarm (ATA) (on vehicles with code (551) Antitheft alarm (ATA)) is also activated by the automatic relocking feature.