2009 AUDI Q7 wiring

___ 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
authorized 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 252.
• The PASSENGER AIR BAG OFF light comes on and stays on in the
center of the instrument panel~
page 253, fig. 253 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 ..

-Airbag system ----------------
& WARNING
(continued)
• Never recline the front passenger's seat to transport objects.
Items can also move into the area of the side airbag or the front
airbag during braking or in a sudden maneuver . Objects near the
airbags can become projectiles and cause injury, particularly when
the seat is reclined .
• Never tilt the front passenger seat backrest forward when the
vehicle is moving . An inflating airbag will force the backrest back­
ward and can injure rear seat occupants .
& WARNING
The fine dust created when airbags deploy can cause breathing
problems for people with a history 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 vehicle 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 careful not to get the dust into your eyes, or into any cuts or
scratches.
• If the residue should get into your eyes, flush them with
water. •
Monitoring the Advanced Airbag
System
Airbag monitoring indicator light ~
Two separate indicators monitor the function of the
Advanced Airbag System: the airbag monitoring indicator
light and the
PASSENGER AIR BAG OFF light.
The Advanced Airbag System (including the electronic control unit,
sensor circuits and system wiring) is monitored continuously to
make sure that it is functioning properly whenever the ignition is on.
Each time you turn on the ignition, the airbag monitoring indicator
light
ffl. will come on for a few seconds (self diagnostics).
The system must be inspected when the indicator light ~:
• does not come on when the ignition is switched on
• does not go out a few seconds after you have switched on the
ignition, or
• comes on while driving
If an airbag system malfunction is detected, the indicator light will
first start flashing to catch the driver's attention and then stay on
continuously to serve as a constant reminder to have the system
inspected immediately .
If a malfunction occurs that turns the front airbag on the passenger
side off, the PASSENGER AIR BAG OFF light will 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 Advanced Airbag System. It is .,._

Trailer towing
Driving with a trailer
Genera l information
Your Audi was designed primarily for passenger transpor­
ta tion.
If you plan to tow a trailer, please remember that the add itional load
wi ll affect durability, economy and performance.
Trai ler towing no t only places more s tress on the vehicle, it a lso ca lls
for more concentration from the driver.
F or this reaso n, always fol low the operating and driving instructions
prov ided and use common sense.
(D Note
If you are going to tow a tra iler, you must activate the trailer opera ­
tion mode =>
page 211, "Towing a trailer".
Technical requirements
Trailer hitch
Use a we ight-carry ing hitch conforming to the gross tra iler weig ht.
T he hitch must be suitable for your vehic le and trailer and must be
m ounted secure ly on the veh icle's chassis at a
technically sound
location. Use only a trailer hitch with a removable ball mount.
Always check with the trai ler hitch ma nufacturer to make sure that
you are using the correct hitch .
Do not use a bumper hitch.
The hitch must be instal led in such a way that it does not in terfere
with the impact-absorbing bumper system. No modifications shou ld be made to the vehicle exhaust and b rake systems . Fro m
Controls and equip­
ment Safety first Vehicle operation
Tr
aile r t owing
time to time, check that all hitch mounting bolts remain securely
fastened .
When you are not towing a trai ler, rem ove the t railer hi tch bal l
mount. This prevents the hitch from causing damage should your
vehicle be struck from behind =>
&.
Trailer bra kes
If your trai ler is equipped with a b raking system, check to be sure
that it conforms to all regulations.
The tra iler hydraul ic bra ke system must not be directly co nnecte d to
the veh icle's hydrau lic brake system=> &.
Safety chains
Always use safety chains between your vehicle and the trailer.
Trail er lights
Trai ler lights must meet a ll regulations. Be sure to check with your
au thorized Audi dea ler for correct wiring, switches, an d relays.
Mirrors
If you are unab le to see the traff ic behind you using the regular
outside mirrors, then you
must instal l extended mirrors. It is impor ­
t ant that you
always have clear v isi on to the rear.
& WARNING
• If a trailer has electrical brake s please note that the se brakes
are not act ivated by the fa ctory-fitted control unit -ris k of acci­
dent!
• After removing the trailer hitch , do not store it in your vehicle.
In case of sudden braking , the hitch could fly forward and injure
you or your passengers .
Vehicle care Do-it-yourself service Technical data