Audi TT (2007 year). Manual — part 273

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

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3

3

2

1

4

4

6

6

5

7

7

8

Oil pressure side

Oil return line

Control pressure

Intake side

Convertible top closing cycle

When closing the convertible top, the hydraulic
pump turns anticlockwise and the two-way valve
now closes on the opposite side. The hydraulic
pressure flows through the check valve to the
hydraulic cylinder beneath the piston rod and
pushes the piston rod upwards, closing the
convertible top.
At the same time, pilot pressure is applied to the
pressure-controlled check valve on the pressureless
side through a bypass port from the pressure side.

If the convertible top switch is still being actuated
when the convertible top reaches its end position,
the hydraulic pressure continues rising to a
maximum of approx. 160 bar.
A spring loaded valve opens and the excess
hydraulic pressure flows back into the oil tank.

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

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391_004

Convenience electronics

Windbreak switch, Cabrio E278

Windbreak

A windbreak is available as optional equipment for the Audi TT Roadster. The windbreak is located between
the two roll bars and the convertible top box and can be raised and lowered electrically.
Its task is to reduce air movement inside the occupant cell in order to enhance driving comfort.

Operating the windbreak

The windbreak can be raised and lowered by the
driver using the windbreak operation switch.
Switch E278 is located in the centre console below
the convertible top operating switch E137.
The switch must remain actuated throughout the
windbreak lowering and raising cycle. An automatic
cycle is not available for this function.

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

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Note

Diagnostics:
There is no control unit between the
sensor and actuator (DC motor). This task is
performed by two relays. No diagnosis is
given for this reason. Hence, no entries
are made in the fault memory in the event
of a fault.
Consequently, no data blocks, adapta-
tions, codings or final control diagnostics
are available this function in the diagnostic
tester.

Electrical function

The "electrical windbreak operation" function is
implemented by an illuminated button with two
relays and a DC motor.
The button can be moved into the "Up" and "Down"
positions by the driver.
Depending on operation, the button closes one of
the two control current circuits of the relays, which
thereupon close the load circuit and energise
windbreak motor, Cabrio V186.

The two relays are mounted on a relay carrier above
the onboard power supply control unit, which is
located in the footwell at the front left. They can be
replaced separately.

Legend:

E278

Windbreak switch, Cabrio

V186

Windbreak motor, Cabrio

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.

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Suspension system

Overview

The running gear is basically identical to that of the
Audi TT Coupé, except for the modifications shown.

Front and rear axle damper set-ups
for front-wheel drive and quattro drive

Front and rear axle suspension set-ups
for quattro four-wheel drive

Set-up of suspension strut bearing
for front-wheel drive and quattro drive

Steel axle carrier for quattro four-wheel drive,
to be introduced in the Roadster and in the TT Coupé

Axle carrier for front-wheel drive
Part adopted from VW EOS, rigidly bolted