2012 AUDI A5 COUPE wiring

-Always move the passenger seat into its
rearmost position in the seat's fore and
aft adjustment range, as far away from
the a irbag as poss ible, before installing
the forward-facing child restraint. The backrest must be adjusted to an upr ight
posit ion.
- Make sure that the
PASSENGER AIR BAG
OFF
light comes on and stays on all the
t ime w henever the ignition is sw itched
on.
Advanced Airbag System components
The fron t 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, brack ­
ets, and more. The function of the system in
the front passenger seat is checked by the
e lectronic control u nit when the ignit ion is on .
The control un it mon itors the Advanced Air­
bag System and turns the airbag indicator
l ight on whe n a ma lfunction in t he sys tem
components is de tected. The function of the
airbag indicator light is described in greater
detai l below . Because the front passenger
seat contains important parts of the Ad ­
vanced A irbag System, you m ust 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 Airb ag Sy stem
consists of the following:
- Crash sensors in the front of the veh icle that
measure veh icle acceleration/decele ration
to provide information to the Advanced Air­
bag System about the seve rity of the crash.
- An electronic co ntrol unit, with integrated
c rash se nsors for front and side impacts .
T he cont ro l unit " decides " whethe r to fire
the front airbags based on the inform ation
received from the crash senso rs . The contro l
unit a lso "decides" whether the safety belt
pretensioners should be activated .
Airbag system 169
-An Advanced A irbag w ith gas gene rator and
contro l valve fo r the driver ins ide the steer ­
ing wheel h ub.
- An Advanced Airbag w ith gas gene rator and
contro l valve inside the instrument pane l 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 informat ion reg istered is sent continu­
ously to the electronic control unit to regu­
late deployment of the front Advanced Air­
bag on the passenger side.
- An airbag monitor ing system and ind icator
light in the instrument cluster
q page 173 .
-A sensor in each front seat registers the dis­
tance between the respective seat and the
steer ing whee l o r inst rument panel. The in­
forma tion registered is sent cont inuo usly to
t he elect ron ic cont ro l uni t to regula te de ­
ployment o f the front Advance d Airbags .
- The
PASSENGER AIR BAG OFF ligh t comes
on and st ays on in the cen ter o f th e instr u­
ment panel
q page 1 73, fig . 178 and tells
you whe n the front Advanced Airbag on the
passenger side has been tu rned
off .
-A sensor below the safety be lt latch fo r the
front seat passenger to measure the tension on the safety be lt . The tension on the safety
be lt and the weight registered by the
weight-sensing mat he lp the control unit
"decide" whether the front a irbag for the
front passenge r seat should be turned
off or
not
~ pag e 163, Child restraints on the
front seat -some important things to
know.
- A senso r in the safety belt latch fo r the d riv­
er a nd fo r the fro nt sea t passenger tha t
senses w hethe r that safe ty belt is latched or
no t and transmi ts this informa tion to the
electronic control unit.
_&. WARNING
Damage to the front passenger seat can
prevent the front airbag from work ing
properly.
-
•
•

Monitoring the
Advanced Airbag
System
Airbag monitoring indicator light
Two separate indicators monitor the function
of the Advanced Airbag System : the airbag
moni toring indicator light and the
PA SSEN ­
GER AIR BAG OFF
light.
The Advanced Airbag System (includ ing the
e lectronic control unit, sensor circuits and sys­
tem wiring) is monitored continuously to
make sure that it is functioning properly
whenever the ignit io n is on . Each t ime you
turn on the ignition, the
I airbag monitoring
i ndicator light w ill come o n for a few seconds
(self diagnostics) .
The system mu st be inspect ed when the
I indicator light:
- does not come on when the ignit ion is
swi tched on,
- does not go out a few seconds afte r yo u
have switched o n the ignition, o r
- comes on w hile d riving .
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
a irbag on the passenger side off, the
PASSEN­
GER AIR BAG OFF
li ght w ill come on and stay
on whenever the ignition is on.
_& WARNING
An airbag system that is not funct ioning
properly cannot provide supp lemen tal p ro­
tection in a fron tal crash .
-If the airbag indic ator l igh t comes on, it
means that there may be someth ing
wrong with the Advance d Airbag System.
It is possible that the airbag will inflate
when it is not s upposed to, or w ill not in­
flate when it should.
-
A irba g sy stem 173
-Have the airbag system inspected imme­
diate ly by you r authorized Aud i dea ler.
PASSENGER AIRBAG OFF light
F ig . 1 78 Sect io n fro m t he in strum en t pa ne l: PASSEN ­
GER AIRBAG OFF lig ht
The PASSENGER AIRBAG OFF light is located
i n the center of the instrument pane l
¢fig . 178.
The PASSENGER AIRBA G OF F light w ill come
o n and stay o n to tell you when the front Ad­
vanced Airbag on the passenger side has been
turned off by the electron ic control unit . Each
t ime you turn on the ignit ion, the
PASSEN­
GER AIRBAG OFF
lig ht w ill flash fo r a few sec·
o nds and:
- will stay on if the front passenger seat is not
occup ied,
- will stay on if there is a small chi ld or child
restraint on the front passenge r seat,
- will go out if the front passenger seat is oc­
cupied by an adult as registered by the
we ight-sensi ng mat .
The
PAS SENGER AIRBAG OFF light must
come on and stay on if the ignition is on and
- a car bed has been installed on the front
seat, or
- a rearward-facing child rest raint has been
installed on the front passenger seat, o r
- a forward -facing chi ld restra int has been in­
stalled on the front passenger seat, or
- the weight registered on the front passen ­
ger seat is equal to or less t han the com ­
b in ed weight of a typical 1 year-old restra in­
ed in one of the rear-facing or forward -fac-
ing infant restra ints listed in Federal Motor ..,.

218 Trailer towing
Trailer towing
Driving with a trailer
General information
Your Audi was designed primarily for passen­
ger transportation .
If you plan to tow a trailer, p lease remember
that the additional load will affect durability,
economy and performance .
Trailer towing not on ly places more stress on
the vehicle, it also calls for more concentra­
tion from the driver.
For this reason, always fo llow the operating
and driving instructions provided and use
common sense.
Technical requirements
Trailer hitch Use a weight-carrying hitch conforming to the
gross trailer weight. The hitch must be suita­
ble for your vehicle and trailer and must be
mounted securely 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 trailer hitch manufacturer to
make sure that you are using the correct
hitch.
Do not use a bumper hitch.
The hitch must be installed in such a way that
it does not interfere with the impact-absorb­
ing bumper system . No modifications should
be made to the vehicle exhaust and brake sys­
tems . From time to time, check that all hitch
mounting bolts remain securely fastened.
When you are not towing a trailer, remove the
trailer hitch ball mount. This prevents the
hitch from causing damage should your vehi­
cle be struck from behind
¢ A.
Trailer brakes
If your trailer is equipped with a braking sys­
tem, check to be sure that it conforms to all
regulations . The trailer
hydraulic brake system must not be
direct ly connected to the vehicle's hydraulic
brake system
~ A.
Safety chains
Always use safety chains between your vehicle
and the trai le r.
Trailer lights
T railer lights must meet all regulations. Be
sure to check w ith your authorized Audi dealer
for correct wiring, switches, and relays.
Mirrors
If you are unable to see the traffic behind you
using the regular outside mirrors, then you
must install extended mirrors . It is important
that you
always have clear vis ion to the rear.
,8. WARNING
- If a trailer has electrical brakes please
note that these brakes are not activated
by the factory-fitted control unit -risk of
accident!
- Afte r 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.
Operating instructions
Maximum trailer weight
-
A trailer for your vehicle is limited to a typical
class 1 or class 2 tra iler.
Trailer load distribution Be sure the load in the trailer is held secure ly
in place to prevent it from shifting forward,
backward or sideways.
Never allow a passenger to ride in a trailer
¢ A in Driving instructions on page 219.
Engine cooling system
T owing a trailer makes the engine work hard ­
er. It is important that the cooling system's
performance is up to the additional load.
Make sure that the cooling system has enough
fluid . .,..