2000 AUDI A4 Instrument Cluster OBD From Model Year 1999 Workshop Manual

01-1


Instrument cluster, On Board
Diagnostic (OBD) (through
M.Y. 1999)

General information


Instrument cluster technology
The Audi A4 instrument cluster is available in two
versions; the low-line version with "mini-check"
system and the high-line version with an LCD
multi-function display.
The mini-check system monitors the brake
system, Engine Coolant Temperature (ECT), fuel
level and engine oil pressure.
The multi-function display contains the following
functions:

Auto check system with radio station and
telephone displays
Ambient outside temperature display
On-board computer display
Transmission Range (TR) selector lever display
for automatic transmission
Pa
ge 1 of 74 Instrument cluster, On Board Dia
gnostic
(OBD
) (throu
gh M.Y. 1999
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.1

Navigation
Pa
ge 2 of 74 Instrument cluster, On Board Dia
gnostic
(OBD
) (throu
gh M.Y. 1999
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.1

01-2
The speedometer contains a LCD display for the
odometer, a trip odometer and the Service
Reminder Indicator (SRI).
Indicator lamps are integrated in the
speedometer and tachometer.
Accessory instruments are integrated into the
instrument cluster.
The instrument cluster is controlled by a
microprocessor and has extensive On Board
Diagnostic (OBD) capabilities. If any component
exhibit signs of failure, a Diagnostic Trouble
Code (DTC) is stored in the instrument cluster
DTC memory. The DTC can then be identified
using the VAG1551 or VAG1552 Scan Tool
(ST).
Pa
ge 3 of 74 Instrument cluster, On Board Dia
gnostic
(OBD
) (throu
gh M.Y. 1999
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.1

01-3

Note:
The descriptions in this Repair Manual reference
the VAS5051 Diagnostic Operation Center
(DOC) and the VAG1551 Scan Tool (ST).
The following Adaptations (adjustments) can be
carried out using the tool:

Adaptation of the fuel sensor characteristics
Adaptation of the fuel consumption display
Coding the language versions for the on-board
computer and Auto Check system.
Adaptation of the Service Reminder Indicator
(SRI)
Adaptation of the odometer after instrument
cluster replacement.
Pa
ge 4 of 74 Instrument cluster, On Board Dia
gnostic
(OBD
) (throu
gh M.Y. 1999
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.1

01-4

Instrument cluster replacement notes

Do not disassemble the instrument cluster.
All warning and indicator bulbs can be replaced
separately: m.y. 1997 Page 90
-4 ; 1998
Page 90
-15
. All other malfunctions require
replacing the complete instrument cluster.

If necessary, the instrument cluster should be
exchanged within the parts exchange program.
Fill in the Failure Description Form and send it
in, together with the instrument cluster.
The instrument cluster must be sent back in its
original packaging.
When replacing the instrument cluster, set the
Odometer display and the Service Reminder
Indicator (SRI) using the VAG1551 Scan Tool
(ST) Page 01
-32
.
Pa
ge 5 of 74 Instrument cluster, On Board Dia
gnostic
(OBD
) (throu
gh M.Y. 1999
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.1

01-5

On Board Diagnostic (OBD), initiating
program


Special tools, test equipment and auxiliary
items

VAS5051 Diagnostic Operation Center (DOC)
and/or VAG1551 Scan Tool (ST).
VAG1551/3 adapter cable

Test requirements
Fuses OK

Electrical Wiring Diagrams Troubleshooting &
Component Locations

Instrument cluster coding checked according
to coding table Page 01
-25


Connect VAS5051 Diagnostic Operation
Center (DOC) or
Connect VAG1551 Scan Tool (ST) Page 01
-241
.
Pa
ge 6 of 74 Instrument cluster, On Board Dia
gnostic
(OBD
) (throu
gh M.Y. 1999
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.1

Ignition switched on
Pa
ge 7 of 74 Instrument cluster, On Board Dia
gnostic
(OBD
) (throu
gh M.Y. 1999
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.1

01-6

Notes:

If the VAG1551 display remains blank, check
the power supply.

Electrical Wiring Diagrams Troubleshooting &
Component Locations

Press the HELP button for additional operating
instructions.
Press the button to advance through the
program sequence.

An incorrect entry can be cancelled by pressing
the -C- button.
In "Rapid data transfer" operating mode 1, the
"Automatic Test Sequence" (address word 00)
can be carried out. This will automatically check
the DTC memories of all of the control modules
in the vehicle which have OBD capability.
Pa
ge 8 of 74 Instrument cluster, On Board Dia
gnostic
(OBD
) (throu
gh M.Y. 1999
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.1