Audi 4.2-litre V8 FSI, Обучение по обслуживанию

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Reference
Foe details of the bus topology, please
refer to SSP 343 - The new Audi A4 ‘05.
Note
The sport seat function is deactivated
automatically after the vehicle battery
terminals are disconnected. The sport seat
function must be reactivated if this has
been set by the customer.
377_079
Function of the sport program button
Multi-function steering wheel control unit
When the sport program button E541 in the centre
console is pressed, a terminal 15 signal is transmit-
ted to the steering column electronics control unit
J527 across a discrete line.
RS sport steering wheel
The signal from the sport program button is
transmitted from the multi-function steering wheel
control unit J453 across the LIN bus to the steering
column electronics control unit.
Seat function
The improved lateral support function of the
front seats is only available in combination with
RS bucket seats.
The backrest and side seat bolsters are inflated.
The seat bolster inflation function can be set
manually using the buttons on the seat.
When the Sport button is pressed, only the driver's
seat side bolster are inflated. If a certain limit has
been preset manually, then the bolsters will be
inflated up to this value.
When Sport mode is turned off, the bolsters are
deflated (approx. two sec.). The sport seat function
can be deactivated by the driver as necessary.
The procedure is described in the vehicle's Owner's
Manual.
Exhaust flap control
After the Sport mode is activated, unlike in normal
operation, the exhaust flaps in the rear silencer are
opened when the engine is idling. This emphasises
the sporty sound of the RS4 engine.
After the engine speed is increased, however, the
exhaust flaps are closed again. This ensures that the
vehicle meets the statutory noise emission limits.
Reopening of the exhaust flaps while driving is
speed and load dependent, and is regulated on the
basis of a characteristic map.
The steering column electronics control unit
converts the signal and sends this message to the
convenience CAN bus.
The message is transmitted via the gateway in the
dash panel insert and is evaluated by the control
unit with display in dash panel insert J285.
A check is made to determine whether the sport
seat function has been activated.
If the function is active, a message to this effect is
transmitted across the convenience CAN bus to the
seat and steering column adjustment control unit
with memory J136, and the driver's seat backrest
and side bolsters are inflated or deflated for two
seconds.
The gateway also transmits the message "Sport
button pressed" to the powertrain CAN bus.
The engine control unit adapts the throttle
progression and exhaust flap control based on this
information.