GF80.20-P-2002RT Operate Central Locking With Transmitter Key, Function

GF80.20-P-2002RT Operate Central Locking With Transmitter Key, Function

Component Identification:

Preset "Selective" or "Global"
Depending on the setting on the transmitter key, the vehicle is unlocked globally or selectively when the "Unlock" button in the transmitter key is pressed.
Changeover is possible by simultaneously actuating the "lock" and "unlock" buttons on the transmitter key for approx. 5 s. The indicator lamp on the transmitter key comes on twice for confirmation.

Unlock globally:
The entire vehicle is unlocked.

Unlock selectively:
Only the driver door and the fuel filler flap are unlocked
Only the next actuation of the "Unlock" transmit button unlocks the entire vehicle.

Function sequence for locking or unlocking
When the "lock and unlock" button on the transmitter key is actuated, it transmits a signal to the roof antenna module.

This is relayed to the EIS control unit via the rear SAM control unit. Parallel to the radio signal an infrared signal is transmitted to the left front IR receiver (precise aiming required). This signal is read in by the left front door control unit and transmitted to the EIS control unit via CAN-B.
In both cases the EIS control unit checks the access authorization of the transmitter key.
If the access authorization is valid, the EIS control unit transmits the "locking or unlocking" command to the front door control unit, the front SAM control unit and rear SAM control unit via CAN B. They then actuate the corresponding CL motors.
The opening request of the trunk lid external operation switch is disabled or enabled by the rear SAM control unit.
When unlocking the interior lighting is switched on by the overhead control panel control unit

If the driver door is opened during locking, the driver door is not locked An open passenger door is locked

Function sequence for rear-end door remote opening
When the "rear-end door remote opening" transmitter button is pressed, the transmitter key sends a radio signal to the left antenna amplifier module.
This is relayed to the EIS control unit via the rear SAM control unit.
Parallel to the radio signal an infrared signal is transmitted to the left front IR receiver (precise aiming required).
This signal is read in by the left front door control unit and transferred to the EIS control unit.
In both cases the EIS control unit checks the access authorization of the transmitter key.

If the access authorization is valid, the EIS control unit transmits the "Open rear-end door" command to the rear SAM control unit. It actuates the rear-end door CL motor in the rear-end door lock for electrically unlocking of the rear-end door.

When the rear-end door is remotely opened with the transmitter key, the central locking (CL) remains inactive (no unlocking). The interior central locking and ATA function display switch is not enabled

Once the rear-end door has been closed, it can only be opened by again operating the transmitter key.

Visual feedback signal
After locking or unlocking an optical feedback is accomplished via the turn signal lamps.
The function is controlled by the rear SAM control unit as Blinkmaster.
Actuation of the individual turn signal lamps is accomplished by the front SAM control unit, rear SAM control unit and front door control units
^ Flashing 3 times when locking (doors and trunk lid must be closed)
^ Flashing once when unlocking

Interior actuation of CL:
After locking, the interior CL switches are deactivated. If the transmitter key is inserted into the EIS control unit, the interior CL switches are reactivated and the fuel filler flap automatically unlocked.