Transmitter for emergency alarm remote actuation task - GF82.25-P-4105-01S

A prespecified procedure exists for checking the functions of the taxi emergency call! 

In combination with driving authorization and locking system components, radio remote actuation (FFA) via the transmitters for emergency alarm remote actuation (A8/4)  enables the actuation of an emergency call/emergency alarm from the immediate vicinity of the vehicle.

In order to avoid unintentional actuation, the ALARM button on the transmitter for emergency alarm remote actuation (A8/4)  must be pressed twice within three seconds.

Depending on the variant code in the special vehicle multifunction control module (SVMCM [MSS]) (N26/9), no  acoustic/visual feedback regarding the actuation of the emergency alarm system is provided. The "taxi emergency call" proceeds unnoticed.

Assignment to the vehicle can be checked as follows without actuating the alarm:

As described under programming, a vehicle key is placed onto the transmitter for emergency alarm remote actuation (A8/4)  . After depressing the TEST button, the tone sequence 1 x long, 5 x short sounds if the battery voltage is correct. Within the next second, the open or close button of the vehicle key must be pressed, as a result of which the transmission of an IR protocol is actuated. After receiving the IR telegram, the transmitter for emergency alarm remote actuation (A8/4)  checks that the ID code corresponds. Only if the transmitter for emergency alarm remote actuation (A8/4)  and the key belong to the same vehicle does a short piezotone sound.

Programming 

The transmitter for emergency alarm remote actuation (A8/4)  is programmed with the vehicle-specific ID code via the IR signal of a key which belongs to the relevant vehicle. In order to achieve this, the end face (direction of IR radiation) of the vehicle key is placed onto the corresponding mark on the IR-permeable base of the transmitter for emergency alarm remote actuation's (A8/4)  housing. After depressing the TEST button, the tone sequence 1 x long, 5 x short sounds if the battery voltage is correct. Within the next 5 seconds, the open or close button of the vehicle key must be pressed, as a result of which the transmission of an IR protocol is actuated.

A continuous tone sounds for 2 s following successful programming.

After the IR signal from the vehicle key has been correctly received by the transmitter for emergency alarm remote actuation (A8/4)  this is programmed to the vehicle code, and is simultaneously protected against further attempts at programming.

The programmed/unprogrammed status can be checked via the piezo sequence when the TEST button on the transmitter for emergency alarm remote actuation (A8/4)  is pressed. The piezo tone sequence of the unprogrammed transmitter for emergency alarm remote actuation (A8/4)  differs from the programmed one in the following manner:

Programmed: 1 x long, 5 x short, brief pause (1 s)

Unprogrammed: 1 x long, 5 x short, 5 seconds pause