Activating alarm signal siren function

As soon as the anti-theft alarm system (ATA) is activated, the pneumatic control module with combined function (A37) will also activate the alarm siren with auxiliary battery (H3/1) by sending a command to the siren. The siren is activated by this command.

As the siren, when in an activated condition, is constantly monitoring its supply and data lines, it is capable of activating an alarm on its own.

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After the ATA has been successfully activated, the alarm siren, with auxiliary battery (H3/1) provides an acoustic feedback signal by sounding the horn three times. No feedback signal will be generated if one of the doors is not closed correctly during activation of the ATA.

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The siren remains active until it is deactivated again by the ATA.

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  Activation, Belgium

In addition to the normal "Activation" function, vehicles for the Belgian market are fitted with the function "Self-activation". After satisfactory completion of the preconditions

- terminal 15 R "Off" and

- driver door "OPEN" and "CLOSED"

the ATA activates itself after a time of t = 120 secs. if the vehicle has not been locked. Time counting starts with closing of the last door.

It is interrupted with opening of any one door and reset with closing of the last door as long as the ATA is not activated. After the command "Open" (remote control), the self-activation is started anew immediately or after deactivation of the ATA. IMS and ATS are also activated, if not switched off.

In this case there will be no acoustic feedback signal.