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Alarm horn H12
The alarm horn H12 is actuated and monitored by the convenience system central control unit J393.
It is located in the front right wheel housing and connected by way of the LIN bus to the convenience system central control unit J393.
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Operation
When primed, a wire monitoring telegram is transmitted cyclically every 800 milliseconds and acknowledged by the alarm horn H12.
In the absence of alarm horn acknowledgement or if the alarm horn H12 no longer receives any data, an alarm is triggered in the alarm horn and convenience system central control unit J393.
Alarm horn H12 signalling is governed by a country code, which is set by the "long encoding" in the convenience system central control unit J393.
Design
The alarm horn H12 has a separate battery which is constantly charged by the onboard power supply control unit J519.
Its function is to safeguard output of the specified alarm tone.
An alarm is also triggered in the event of wiring manipulation.
On account of vehicle registration regulations, the "acknowledgement beep" on locking the vehicle is not permissible on the German market.
The alarm horn is also available without
LIN bus interface. Exact Audi genuine part number is required for ordering replacement parts.
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Key Features
- Mobile phone installation with voice control
- Echo compensation and speed-dependent volume control
- Center loudspeaker for enhanced acoustics
- BOSE sound system with 6-channel actuation
- Advanced control unit networking
- Transportation mode for minimizing power consumption
- Selective convenience CAN sleep mode
- Master function for terminal 15 continued operation
- Load management for electrical system stability