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Driver
information
system
On Board
Diagnostic
System
(OBD)
Malfunction Indicator Lamp (MIL)
The Malfunction
Indicator
Lamp (M
I
L)
¢•
in
the
instrument cluster is part of the On-Board
Diag-
nostic (OBD II) system.
The
warning/indicator
light
ill
uminates when
the
ignition is switched on and
goes
out after the en-
gine starts and the idle has stabilized.
This
indi-
cates 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
malfunction 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
lim-
iter may also
be
malfunctioning.
For
more infor-
mation
c::>
page 28, Electronic speed limiter.
An improperly
closed
fuel filler cap may
also
cause
the MIL light
to
illuminate
c::>
page 192.
On-Board Diagnostics
Fig. 16
Locati
on of Data Link
Connect
or (DLC)
On-Board Diagnostics monito
rs
the components
of your emission
control system. Each
monitored
component in your engine system has been as-
signed a code. In case of a malfunction, the com-
ponent will be identified and the fault stored as a
code in the control module memory
.
28
The MIL
light may also illuminate if
there
is a
leak in the on-board fuel vapor
recovery
system.
If the light
illuminates
after a
refueling,
stop the
vehicle and make sure the
fuel
filler cap
is
prop-
erly closed
c::>
page 192.
In order to make an accurate diagnosis, the
stor-
ed data can only be
displayed
using
special
diag-
nostic equipment (generic scan tool for 080).
In
order to connect the
special
diagnostic equip
-
ment,
push
the plug into the Data Link
Connector
(DLC). The DLC is located to the right of the
hood
release
c::>
fig. 16.
Your
authorized
Audi
dealer
or qualified work-
shop can interpret the code and
perform
the nec-
essary repair.
A
WARNING
Do
not
use the
diagnostic
connector for
per-
sonal
use.
Incorrect
usage
can cause malfunc-
tions, which can increase the risk of a colli-
sion!
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
may be less than the
maxi-
mum speed
of
your vehicle.
To
reduce
the
risk
of
sudden
tire
failure and
loss
of control if
the
vehi-
cle
is operated at excessive speeds, your vehicle
has
an electronic speed
limiter.
The electronic
speed
limiter
prevents your vehicle from
going
faster than the tire speed rating. For more infor-
mation
c::>
page 209.
-
If the engine contro
l
unit
receives
faulty vehicle
roadspeed
signa ls, the
Malfunction
Indicator
Light (MIL)
II
will illuminate. If this occurs, con-
tact the nearest author ized Audi dealer for assis-
tance.
A
WARNING
Always
observe the
posted
speed lim its and
adjust
your speed
to
suit prevailing
road, t raf-
fic and weather conditions. Never drive
your
vehicle faster than
the
maximum speed
rating
of the
tires installed.
-
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