GF80.20-P-2002GX Operating Central Locking With Transmitter Key, Function

GF80.20-P-2002GX Operating Central Locking With Transmitter Key, Function
- with CODE (849) Spare wheel holder/spare wheel

Component Identification:

Definition for selective/global unlocking
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.

Unlock globally:
The entire vehicle is unlocked.

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.

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 via radio. 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 or right front IR receiver (precise aiming required).

The right front IR receiver is installed on the Japanese version only.

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 "Lock or unlock" command to the front door control unit, the front SAM control unit and rear SAM control unit via CAN B. Then they actuate the corresponding CL motors in the side door, the rear-end door as well as the spare wheel carrier.

The opening request of the rear-end door switch external operation is disabled or enabled by the rear SAM control unit.

When unlocking, the interior lights 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 opening rear-end door
Generally only the rear-end door and the spare wheel carrier are unlocked.

When the "Rear-end door remote opening" transmit button is actuated, the transmitter key transmits a radio 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).

The right front IR receiver is only installed on the Japanese version.

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 locking unit in the rear-end door lock and parallel to this, the spare wheel carrier CL motor in the spare wheel carrier, to release electrically.

The spare wheel carrier can only be unlocked with the handle on the spare wheel carrier and can be pivoted manually until it arrests in the 90° position.
In this position, the open spare wheel carrier switch transmits the signal to the rear SAM control module, that the rear-end door can be unlocked.

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
After locking or unlocking, a visual feedback is accomplished via the turn signal lamps.
^ Flashing 3 times when locking (doors and rear-end door must be closed)
^ Flashing once when unlocking

The function is controlled by the rear SAM control unit as Blinkmaster.
The individual turn signal lamps are actuated by the front SAM control unit, rear SAM control unit and the front door control units.

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.