On-Board Diagnostic system (08D)
On-Board Diagnostics
Fig. 10 location of
Data Link Connecto r
( DL C)
On-Board Diagnostics monitors the components of your emission
control system . Each controlled component in your engine system
has been assigned a code. In case of a malfunction , the component
will be identified and the fault stored as a code in the control
module memory .
The Mil lamp may also illuminate if there is a leak in the on-board
fuel vapor recovery system . If the light illuminates after a refuelling,
pull off the road and stop the vehicle, then check that the fuel filler
cap is properly closed
=> page 220 .
In order to make an accurate diagnosis, the stored data can only be
displayed using special diagnostic equipment (generic scan tool for
OBDl.
In order to connect the special diagnostic equipment, push the plug
into the Data Link Connector (DLC). The DLC is located to the right of
the engine hood re lease lever=> fig. 10.
Your authorized Audi dealer or a qualified service station can inter
pret the code and perform the necessary repair. •
Contro ls and eq uip
ment
Driver information display
Malfunction Indicator Lamp (MIL) (USA
models)/ (Canada models)
The Malfunction Indicator Lamp (MIU in the instrument cluster
=> page 11, fig . 5 is part of the On-Board Diagnostic (OBD II) system .
The warning/indicator light illuminates when the ignition is
switched on and goes out after the engine starts and the idle has
stabilized. This indicates that the Mil is working properly .
If the light does not go out after the engine is started, or illuminates
while you are driving, a ma lfunction may exist in the engine system.
If the light illuminates, the catalytic converter could be damaged.
Continue driving
with reduced power (avoiding sustained high
speeds and/or rapid accelerations) and have the condition
corrected . Contact your authorized Audi dealer.
If the light illuminates , the electronic speed limiter may also be
malfunctioning. For more information=>
page 21, "Electronic speed
limiter".
An improperly closed fuel filler cap may also cause the MIL light to
illuminate
=> page 220. •
Electronic speed limiter
Your vehicle may be factory equipped with tires that are rated for a
maximum speed of 130 mph (210 km/h) . This is less than the
maximum speed of your vehicle. To reduce the risk of sudden tire
failure and loss of control if the vehicle is operated at excessive
speeds, yo ur vehicle also has an electronic speed limiter. The elec
tronic speed limiter prevents your vehicle from going faster than the
tire speed rating. For more information
=> page 256, "Speed rating
(letter code)".
If the engine control unit receives faulty vehicle roadspeed signals,
the Malfun cti on Indicator Light (MIU will illuminate . If this
occurs, contact the nearest authori zed Audi dealer for assistance. _.,
Vehicle care I I irechnical data
Fuel supply and filling your fuel tank
Your vehicle fuel tank has an on-board refuelling vapor recovery
sys te m. Th is f eat ure he lp s to p re vent f uel vapors from es ca pin g
from the tan k and polluting the environment while you refue l your
vehic le . In ord er to fill t he tank pr ope rly while protec tin g the e nvi
ronm ent, pl eas e follow this refu eling procedur e carefu lly.
& WARNING
Under normal operat ing conditions , never carry additional fuel
containers in your car. Gas canisters and other containers used to
tran sport fuel can be dangerous . Such containers , full or empty ,
may leak and could cause a fire in a collision .
If you must transport
fuel to use for your lawn mower , snow blower , etc ., be very careful
and always observe local and state laws regarding the use , trans
portation and storage of such fuel container s. Make certain the
container meets industry standards (ANSI/ASTM F852 -86).
0 Note
Never drive your vehicle unti l the fue l tank is completely d ry . The
i rre gular supply o f fu el can cause mis firin g. Gaso lin e cou ld en ter
into the exhaust system and damage the catalytic converter. •
Refuelling
The fu el filler fl ap is unlo cke d from a bu tton i n t he driver 's
d oo r.
Fi g. 159 Dr iver' s door :
Unlocking fuel fille r
flap
Fig . 160 Fuel cap
hooked on the opened
fuel filler flap
W hen addin g fuel , th e ign itio n a nd a ny ce llular phon es in
th e ve hicle mu st b e switche d
off.
Taking the fuel cap off
To open t he fue l filler flap, pull t he button~ fig. 1 59 .
Unsc rew fuel filler cap co unter-clock wise an d hang it o n
t h e fuel fille r flap ~ fig. 16 0.
~
Fuel supply and filling your fuel tank -___________ ...:._:......:,_______;::;...a,__ __
•
Refuelling procedure
-Inse rt the fuel nozz le f rom the gaso line pump i nto the
fuel filler neck as fa r as it w ill go.
- Select a medium refue lling rate so that the nozzle
s w itches off automat ica lly wh en the tank is ful l.
Putting the fuel cap back on
- Afte r fillin g yo ur ta nk, twi st the f uel fill er ca p clockwi se
unt il you h ear a de finite cli ck.
- Cl ose the fue l fille r fla p.
To avo id fuel sp illing or evapora tin g from the fuel tan k alwa ys close
f u el filler cap p roper ly an d co mple te ly . A n im prope rly clo sed f uel
fil ler cap may also caus e a m essa ge in th e dr iver in for matio n syst em
or cause the MIL lamp => page 21 to come on.
& WARNING
Improper refueling or handling of fuel can cause fire , explosion
and severe burns .
• Fuel is highly flammable and can cause severe burns and other
injuries .
• Failure to shut the engine off while refueling and /or to insert
the pump nozzle fully into the fuel filler ne ck could cause fuel to
spray out of filler neck or to overflow. Fuel spray and overflowing
fuel can cause a fire .
• Never use a cellular telephone while refueling . The electromag
netic radiation can cause sparks that can ignite fuel vapors and
c ause a fire .
• Never get ba ck into your vehicle while refueling .
If in excep
tional circumstances you must get back in your vehicle while refu
eling , make certain that you close the door and touch metal to
discharge static electricity before touching the filler nozzle again.
& WARNING (continued )
Static electricity can cause sparks that can ignite fuel vapors
released during refueling .
• Never smoke or have an open flame anywhere in or near your
vehicle when refueling or filling a portable fuel container.
• For your safety, we strongly recommend that you do not travel
with a portable fuel container in your vehicle. The container , full or
empty may leak and could cause a fire , especially in a crash .
• If, under e xceptional circumstances , you must transport a
portable fuel container, please observe the following:
-Never fill a portable fuel container while it is anywhere in or
on the vehicle (for example , in the luggage compartment , or on
the trunk). Static electricity can build up while filling and can ignite fuel vapors cau sing a fire.
- Always place a portable fuel container on the ground before
filling.
- Always keep the filler nozzle completely inside the portable
container before and during filling .
- If filling a portable container made of metal , the filler nozzle
must always be in contact with the container. This will help
prevent static electricity from discharging and cause a fire.
- Never spill fuel inside the vehicle or luggage compartment .
Fuel vapors are h ighly flammable.
- Alway s observe local and state /provincial laws regarding the
use , storage and transportation of fuel containers.
- Make certain the fuel container meets industry standards
(ANSI / ASTM F852-86I.
0 Note
• I f any f uel has sp illed onto the car , it shou ld be removed imme
d iate ly to pr event damage to the pa int.
• I f the f uel ta nk ru ns co mplete ly empty in a vehic le wi th a diesel
engine , the ignitio n mus t remain sw itched on for at least 30 seconds .,
Vehicle care
I t •
-Fuel supply and filling y our fu el ta nk P'lf:l _ -----=-=--=-- --=-.c.-------------
after refueling before starting the engine. It may take longer than
usual for the engine to start, even up to a minute. This is because
the air must first bleed out of the fuel system when starting the
engine.
W For the sak e of the environm ent
As soon as the correctly ope rated nozzle swi tches off automatical ly
for the first time, the tank is full. Do not try to add more fuel because
fue l may spill out . In addition, the expansion space in the fuel tank
wi ll be filled -causing the fuel to overflow when it becomes warm
and pollute the environment.
[ i J Tip s
• Running your engine while refuelling may cause vapors to
escape or even fuel to spill out of the tank . Th is would then shut off
the fue l nozzle before the tank is full.
• Do not refuel your veh ic le with the ignit ion switched on. The fue l
gauge may otherwise not indicate the correct fuel level after
refuel ling .•
Unlocking the fuel filler flap by hand
You can open the fuel filler flap by hand
if the power
locking system should fail.
Fi g. 16 1 In side th e
lu ggag e compartm ent:
O pen in g th e f ue l fill er
fl ap
by ha nd
- Ope n the rear lid.
- Remove the screwdrive r from the vehicle tool kit
=>
page 268 .
- Use the screwdriver (vehicle tool kit) to pry the cover off
at the recess => fig. 161
(D.
- P ull the actuator in the direction of arrow@ to release
the fuel filler flap=> fig. 161.
- Open the fuel filler fl ap .•