Data Exchange - Audi A6´05 323 Service

Airbag warning lamp K75
The airbag warning lamp, which is located in
dash panel insert J285, is triggered via the bus CAN.
If there is no data message from the airbag control
unit, the warning lamp is automatically switched on
from the dash panel insert.
Rear crash detection
In the event of a rear-end crash, the airbag control
unit evaluates the information from the internal
crash sensor and the crash sensors for front
airbags G283 and G284. If their signals exceed a
fixed value, the belt tensioners are ignited and
the battery cut-off relay is activated.

Data exchange

The airbag control unit is integrated within the
drive CAN.
The airbag control unit transmits the following
information on the drive CAN:
– Trigger warning lamp K75
– Activate belt warning
– Diagnosis data
– Crash signal
– Crash information for the actuator test
– ESP data
– Front passenger airbag disabled (for USA only)
The airbag control unit evaluates the following
information from the data bus:
– Dimming of the airbag warning light
Passenger airbag off
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