2009 AUDI TT COUPE wiring

There are three reasons why the defective bulb message would
appear in the display:
• The light bulb has burnt out=>
page 278.
• The fuse is "blown"=> page 274, "Replacing a fuse".
• The wire connection to the light bulb is defective.
Have the bulb replaced or the connection repaired by your autho ­
rized Audi Service department.
& WARNING
• Light bulbs are pressurized and could explode while they are
being changed causing serious personal injury.
• Work with due care when handling the high-voltage section of
gas discharge (xenon) lamps. Failing to do so could result in death
or serious injury! •
Brake light defective i( r (USA
models)/ (Canada models)
In case of a malfunction or component failure, the symbol
(USA models)/ (Canada models) can appear . The following elec­
trical components should be checked, repaired or replaced, as
necessary:
• Brake light bulbs
• All wiring connections
• Brake light switch
Contact your authorized Audi dealer for assistance if necessary.
[ i] Tips
The brake light switch is only inspected as part of the functional
check after the engine is started .•
Controls and equip ­
ment
Driver information system
Ap plies to veh ic les : w it h auto matic headli ghts
Light/rain sensor defective U
The indicator light indicates a defect in the automatic
headlights/automatic wiper system.
If the symbol illuminates, the light sensor has failed. For safety
reasons , the low beams are turned on permanently with the switch
in
AUTO. However, you can continue to turn the lights on and off
using the light switch . In the case of a defect in the rain sensor, the
windshield wiper lever functions are still available. Have the
light/rain sensor checked as soon as possible at an authorized Audi
dealer. •
Applies to v ehi cle s : with Ad aptive Light
Adaptive Light defective " )
Adaptive light defective
When this symbol l-illuminates, it means that Adaptive Light is
defective. Go to a qualified workshop to have the headlights or the
control unit for the Adaptive Light repaired. •
Applies to veh ic les : wi th tir e pr essu re m on it o ring sys tem
Tire pressure monitoring system
Tire pressure that is too low must be corrected as soon as
possible.
If the O symbol flashes for about one minute after the igni­
tion is switched on and then remains on, there is a malfunc­
tion in the system. Consult the nearest authorized Audi
dealer as soon as possible.
Additional information about the tire pressure monitoring system
can be found:=> page 253. •
I • •

___ A_ ir_ b_ a-g _ s_y _s_ t_ e_ m _________________________________________________ _
& WARNING (continued)
• If you must install a rearward facing child safety seat on the
front passenger seat because of exceptional circumstances and
the PASSENGER AIR BAG OFF light does not come on and stay on,
immediately install the rear-facing child safety seat in a rear
seating position and have the airbag system inspected by your
Audi dealer.
& WARNING
If, in exceptional circumstances, you must install a forward-facing
child restraint on the front passenger's seat:
• Always make sure the forward -facing seat has been designed
and certified by its manufacturer for use on a front seat with a
passenger front and side airbag.
• Never put the forward-facing child restraint up against or very
near the instrument panel.
• Always move the passenger seat into its rearmost position in
the seat's fore and aft adjustment range, as far away from the
airbag as possible, before installing the forward-facing child
restraint . The backrest must be adjusted to an upright position.
• Make sure that the PASSENGER AIR BAG OFF light comes on
and stays on all the time whenever the ignition is switched on. •
Advanced Airbag System components
The front passenger seat in your vehicle has a lot of very important
parts of the Advanced Airbag System in it. These parts include the
weight-sensing mat, sensors, wiring, brackets, and more. The func­
tion of the system in the front passenger seat is checked by the elec ­
tronic control unit when the ignition is on. The control unit monitors
the Advanced Airbag System and turns the airbag indicator light on
when a malfunction in the system components is detected. The
function of the airbag indicator light is described in greater detail below
. Because the front passenger seat contains important parts
of the Advanced Airbag System, you must take care to prevent it
from being damaged. Damage to the seat may prevent the
Advanced Airbag for the front passenger seat from doing its job in
a crash .
The front Advanced Airbag System consists of the
following:
• Crash sensors in the front of the vehicle that measure vehicle
acceleration/deceleration to provide information to the Advanced
Airbag System about the severity of the crash.
• An electronic control unit, with integrated crash sensors for front
and side impacts. The control unit "decides" whether to fire the
front airbags based on the information received from the crash
sensors. The control unit also "decides" whether the safety belt
pretensioners should be activated.
• An Advanced Airbag with gas generator for the driver inside the
steering wheel hub .
• An Advanced Airbag with gas generator inside the instrument
panel for the front passenger.
• A weight-sensing mat under the upholstery padding of the front
passenger seat cushion that measures the total weight on the seat.
The information registered is sent continuously to the electronic
control unit to regulate deployment of the front Advanced Airbag on
the passenger side.
• An airbag monitoring system and indicator light in the instru ­
ment cluster ~
page 146.
• The PASSENGER AIR BAG OFF light comes on and stays on in the
center of the instrument panel~
page 147, fig. 113 and tells you
when the front Advanced Airbag on the passenger side has been
turned off.
• A sensor below the safety belt latch for the front seat passenger
to measure the tension on the safety belt. The tension on the safety
belt and the weight registered by the weight -sensing mat help the
control unit "decide" whether the front airbag for the front ..

___ A_ ir_ b_ a-g _ s_y _s_ t_ e_ m _________________________________________________ _
& WARN ING (continued )
airbag during br aking or in a sudden m aneuver . Obje cts near the
airbags can become proje ctiles and cause injury , parti cularly when
the seat is re clined .
• Never tilt the front p assenger seat ba ckrest forward when the
vehi cle is moving . An inflating airbag will force the backrest back­
ward and can injure rear seat occupant s.
& WARNING
The fine dust created when airbags deploy can cause breathing
problems for people with a h istory of asthma or other breathing
conditions.
• To reduce the risk of breathing problems , those with asthma or
other respiratory conditions should get fresh air right away by
getting out of the veh icle or opening windows or doors .
• If you are in a collision in which airbags deploy , wash your
hands and face with mild soap and water before eating .
• Be c areful not to get the dust into your eyes , or into any cuts o r
scratches .
• If the residue should get into your eyes , flush them with
water .•
Monitoring the Advanced Airbag
System
Airbag monitoring indicator light :~
Two separ ate indi ca tor s m onitor the functi on of the
A dvance d Airbag Sys tem: th e air bag monitor ing i ndic ator
lig ht and t he
PASSENGER AIR BAG OFF light.
The Advanced Airbag Sys tem ( includ ing t he e lectronic co ntrol unit,
sensor circuits and system wiring ) is monito red continuous ly to ma
ke sure tha t it is functioning properly whenever the ignition is on .
Eac h tim e yo u turn o n the igniti on, the ai rbag m onito ring indica to r
li ght ~ wi ll come on for a few seconds (self diagnost ics).
The system must be inspected when the indicator light
m :
• does not co me o n w hen the igni tion is switche d on,
• does not go out a few seconds after you have switched on the
ig niti on, or
• comes on whi le driving.
If an a irbag sys tem malfu nction i s dete cted, the in dica tor lig ht will
first start f lashing to catch the driver 's attention and then stay on
c o nti nuou sly to serve as a c ons tan t re mind er to have the sys tem
inspected immediately.
I f a malfunction occu rs that turns the front airbag on the passenger
side o ff, the PASSENGER AIR BAG OF F lig ht w ill come on and stay on
whenever the ignition is on.
& WARNING
An airbag system that is not functioning properly cannot provide
supplemental protection in a frontal crash.
• If the airbag indicator light comes on , it means that there may
be something wrong with the Ad vanced Airbag System. It is
possible that the airbag will inflate when it is not supposed to , or
will not inflate when it should .
• Have the airbag system inspected immediately by your Audi
dealer .•