GF80.50-P-2001MCU Activate/Deactivate Anti-Theft Alarm System, Function

GF80.50-P-2001MCU Activate/deactivate Anti-theft Alarm System, Function
- with CODE (V01) Anti-theft alarm system (FFO)


Activate
When the lock button on the transmitter key is actuated, it transmits a radio signal to the SAM control unit (N10/10). It checks the access authorization of the transmitter key. If the access authorization is valid, the vehicle is locked via the central locking (CL) and the anti-theft alarm (ATA) is activated 25 s after the vehicle is locked.
Moreover, the ATA can be activated via the automatic CL relocking function:
If the vehicle is unlocked via the transmitter key and if one of the doors or the trunk lid is not opened within 60 s, the vehicle is relocked and the ATA is completely activated 25 s after the vehicle is locked.

During the arming phase, the LED integrated into the tow-away protection/interior protection switch (S6/1s10) flashes at a higher frequency. Visual feedback from the completely activated ATA is output by flashing at a low frequency.

If the vehicle is locked with the CL emergency locking function, the ATA is not activated.

When the ATA is activated, the following functions are performed:
^ Monitoring doors and rear-end door
^ Interior motion sensor
^ tow-away protection

Partial activation
Function requirements
^ ATA not activated
^ Transmitter key removed

Function
If the tow-away protection/interior protection switch is actuated within 60 s after the transmitter key is removed, the tow-away protection and interior protection functions are deactivated. In this case, the LED integrated into the tow-away protection/interior protection switch comes on. After locking, the visual feedback is analog to complete activation.
Deactivation of the tow-away protection and interior protection is only valid for the following activation.
Deactivation is reset with circuit 15 On or each time the ATA is deactivated. An exception here is automatic activation of the trunk lid remote opening (on model 451.3). The previous status is restored during this procedure.

Deactivating
The ATA can be deactivated by:
^ Unlocking CL with transmitter key or
^ Circuit 15 On

Unlocking CL with transmitter key:
The request of the transmitter key is received by the SAM control unit. This checks the validity of the transmitter key. If the transmitter key is valid, the ATA is deactivated.

Circuit 15 On:
After inserting the transmitter key into the ignition/starter switch (S2/1) the ID code of the transmitter key is received inductively by the transponder coil (L11) when circuit 15 is On. It directly relays the ID code to the SAM control unit for checking. If the ID code is valid, the ATA is deactivated.