On-Board Diagnostic System (Obd) - Audi TT 2012 Owner's Manual

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Driver information system
Speed warning 1: setting a speed limit
Warning threshold 1 is set by the button,
Fig. 24 Section of instrument cluster: Set/Check but-
ton
Storing the maximum speed
~ Drive at the desired maximum speed.
~ Press the knob buttonq fig. 24 until the
speed warning symbolli] (USA models)/li]
(Canada models) appears.
Resetting the maximum speed
~
Drive the vehicle at a speed of at least
3 mph (S km/hl
~ Press the knob for more than 2 seconds.
The speed warning symbolli] (USA models)/
ri
(Canada models) will appear briefly in the
display when you release the button to indi-
ca te that the maximum speed has been stored
successfully.
The maximum speed remains stored until it is
changed by pressing the button again briefly
or until it is deleted bya lengthy push on the
button.
Speed warning 2: setting a speed limit
' 1
Switches in the wiper arm are used to operate
warning threshold 2.
------1@
Fig.2S Wiper lever: Trip computer controls
To store maximum speed
~
Turn off the ignition.
~ Briefly press the button in the instrument
cluster q page 32, fig. 24. The odometer
and the digital clock are now illuminated.
~
Press the button for at least 2 seconds. The
currently stored maximum speed appears in
the display or the crossed out symbol for
'warning threshold 2, if no maximum speed
was set previously.
~
Press the function selector switch in the
wiper
lever@qfig. 2S
up or down to
change the set
valu~.
Values run up or down
in steps of 6.2 mph (10 km/hl.
To delete maximum speed
~
Turn off the ignition.
~
Briefly press the button in the instrument
cluster
q page
32,
fig.
24.
The odometer
and the digital clock are now illuminated.
~
Press the button for at least 2 seconds. The
currently stored maximum speed appears in
the display.
~
Press the reset button in the wiper lever
®
q fig. 25 until the crossed out speed warn-
ing symbol for warning threshold 2 appears
in the display.
A few seconds after the adjustment is com-
pleted, the illumination for the odometer and
the digital clock will go out.
~
CD
Tips
This warning threshold can also be con-
trol led through the trip computer
qpage
26,
Navigating the menu.
On-Board Diagnostic
system (OBD)
On-Board Diagnostics
Fig. 26 Location of Data Link Connector (DLC)
On-Board Diagnostics monitors the compo-
nents ofyour emission control system. Each
monitored component in your engine system
has been assigned a code. In case of a mal-
function, the component will be identified
and the fault stored as a code in the control
module memory.
The MIL light may also illuminate if there is a
leak in the on-board fuel vapor recovery sys-
tem. If the light illuminates after a refuelling,
stop the vehicle and make sure the fuel filler
cap is properly closed
q page 180.
In order to make an accu rate diagnosis, the
stored data can only be displayed using spe-
cial diagnostic equipment (generic scan tool
for OBD).
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 hood release qfig. 26.
Your authorized Audi dealer or a qualified
service station can interpret the code and per-
form the necessary repair.
Driver information system
Malfunction Indicator Lamp (MIL)
The Malfunction Indicator Lamp (MIL)
Gil
in
the instrument cluster 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 proper-
ly.
If the light does not go out after the engine
is started, or illuminates while you are driv-
ing, a malfunction may exist in the engine sys-
tem. Ifthe light illuminates, the catalytic con-
verter could be damaged.
Continue driving with reduced power (avoid-
'ing sustained high speeds and/or rapid accel-
erations) 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 q page 33, Electronic speed
limiter.
An improperly closed fuel filler cap may aLso
cause the MIL Light to illuminate
qpage 180.
Electronic speed limiter
Vour vehicle may be factory equipped with
tires that are rated for a maximum speed of
130 mph (210 km/hl. 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,
your vehicle also has an electronic speed limit-
er. The electronic speed limiter prevents your
vehicle from going faster than the tire speed
rating. For more information
qpage 209.
If the engine control unit receives faulty vehi-
cle roadspeed signais, the Malfunction Indica-
tor Light (MIL)
!il
will illuminate. Ifthis oc-
curs, contact the nearest authorized Audi
dealer for assistance.