display AUDI A4 1999 B5 / 1.G 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
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p://127.0.0.1:8080/audi/servlet/Dis
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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).
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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.
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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
.
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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.
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01-7

- Switch ignition on.

- Switch printer on by pressing PRINT button
(indicator light in button comes on).

- Press button -1- to select "Rapid data transfer"
operating mode 1. Rapid data transfer
HELP
Insert address word XX

Indicated on display
Address word for instrument cluster: 17
- Press buttons -1- and -7-.
Rapid data transfer
Q
17 - Instrument Cluster

Indicated on display
- Press -Q- button to confirm input.
8D0919930L B5-Instrument Cluster VDOX16Coding 00262
WSC 06812

Indicated on display (after approx. 5 seconds) (example)
8D0919930L: part number of instrument cluster (see also parts
exchange program) B5-Instrument Cluster: component designationVDO: manufacturer ID (UN4 = Nippon Seiki, VD0 = VDO)X16: instrument cluster software versionCoding 00262: instrument cluster codingWSC 06812: dealership number
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01-8

Note:
Check coding using the coding table Page 01
-
25
.

-
Press button.Rapid data transfer
HELP
Control module does not answer

Electrical Wiring Diagrams Troubleshooting & Component Locations - If one of these four messages is displayed, carry out troubleshooting
procedures:
Rapid data transfer
HELP
Error in communication link

or
Rapid data transfer
HELP
K wire not switchin
g to Ground

or
Rapid data transfer
HELP
K wire not switchin
g to B+

or
Rapid data transfer
HELP
Select function XX

Indicated on display
When the HELP button is pressed, a list of possible functions prints out.
-
Press button to advance through program sequence.
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01-10

Check DTC Memory (scan tool function
02)


Note:
The displayed DTC information is updated only
when initiating OBD or with "Erase DTC Memory"
function 05.

- Switch printer on by pressing PRINT button
(indicator light in button comes on).
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -2- to select "Check DTC Memory" function 02.
Rapid data transfer
Q
02 - Check DTC Memor
y

Indicated on display
- Press -Q- button to confirm input.
X DTC recognized

The number of stored DTCs appears in the display.
The stored DTCs are displayed and printed out one after the other.
- Check print-out against DTC table ( Page 01
-12
) and repair all
malfunctions as necessary.
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01-11

No DTC recognized!

If "No DTC recognized!" is displayed, the program will return to "Select
function XX" prompt after the button is pressed.
Rapid data transfer
HELP
Select function XX

Indicated on display
If something different appears on the display:
VAG1551 Scan Tool (ST) operating instructions - End output (function 06) Page 01
-22
- Switch ignition off and disconnect scan tool from Data Link Connector
(DLC).
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01-12
Diagnostic Trouble Code (DTC) table for instrument cluster

Notes:

The following table lists all possible Diagnostic Trouble Codes (DTCs) which the instrument cluster can recognize and
which the VAG1551 scan tool can print.
DTC numbers only appear on the printout.
Before replacing any component shown as malfunctioning, check all related wiring and connections of these components
and the Ground (GND) connections Electrical Wiring Diagrams Troubleshooting & Component Locations After the repair has been carried out and the functional system check, re-check and erase the DTC memory using the
VAG1551 scan tool.
The DTC memory records all static and sporadic (intermittent) malfunctions. A malfunction is considered static if it exists
for at least 2 seconds (exceptions: 60 seconds for outside temperature display and 30 minutes, for engine coolant sensor).
If the malfunction is not present after this time, it will be stored as a sporadic DTC and "/SP" will appear on the right side of
the scan tool display.
After switching the ignition on, all existing DTCs are set to sporadic. If they are still present after the system check, they
will be stored as static DTCs.
If a sporadic malfunction does not reoccur within 50 driving cycles (ignition on for at least 5 minutes and vehicle speed
greater than 30 km/h or 18 mph), it will be erased.
Pa
ge 14 of 74 Instrument cluster, On Board Dia
gnostic
(OBD
) (throu
gh M.Y. 1999
)
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.1