AUDI A4 1995 B5 / 1.G Instrument Cluster OBD From Model Year 2000 Workshop Manual

01-79


Instrument cluster with long
service life, On Board
Diagnostic (OBD) (from m.y.
2000)

General information


Technical features of the instrument cluster
The instrument cluster is equipped with a service
display which can process flexible data, that is,
the instrument cluster evaluates various vehicle
based service requirements on input quantities
such as driveability or oil consumption.
The long service life is capable of reproducing
the functions of the standard SRI, when the limits
are set correctly. The limits are variable (in U.S.
with set limits Table Page 01
-80
).
It is also possible to evaluate the oil temperature
sensor. Adaptation channels in the VAG On
Board Diagnostic (OBD) make this possible.
Pa
ge 1 of 99 Instrument cluster with lon
g service life, On Board Dia
gnostic
(OBD
) (from m.
y. 2000
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.2

01-80
In countries where the standard Service
Reminder Indicator (SRI) values are still used,
such as the USA, the following constant
adaptation values must be entered:

Table for Service Reminder Indicator values
without long service life

Channel 42 (minimum mileage
performance) 8000
miles
Channel 43 (maximum mileage
performance) 8000
miles
Channel 44 (maximum time interval
until next service) 365
days
Channel 45 (oil quality) 1
Pa
ge 2 of 99 Instrument cluster with lon
g service life, On Board Dia
gnostic
(OBD
) (from m.
y. 2000
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.2

01-81
The Audi A4 instrument cluster is offered with a
Midline version with Minicheck system and the
Highline version with Driver Information System
(DIS).
The instrument cluster in the Audi S4 is only
offered with the Highline version with Driver
Information System.
The speedometer contains an LCD display for
the odometer and trip odometer.
A LCD display for LCD-clock/date is located in
the tachometer.
The service reminder indicator is displayed in the
center display.
The warning/ indicator lights are integrated in the
speedometer and tachometer.
Pa
ge 3 of 99 Instrument cluster with lon
g service life, On Board Dia
gnostic
(OBD
) (from m.
y. 2000
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.2

01-82
Details about the instrument cluster

Operating instructions Audi A4 or Audi S4 The instrument cluster is controlled by a
microprocessor and has extensive On Board
Diagnostic (OBD) capabilities. If malfunctions
occur in any of the system components,
corresponding Diagnostic Trouble Codes (DTC)
are stored in the DTC memory of the instrument
cluster. These can then be identified using the
VAG1551 or VAG1552 Scan Tool (ST).

Note:
The description in this repair manual only refers
to the VAG1551 Scan Tool (ST).
Pa
ge 4 of 99 Instrument cluster with lon
g service life, On Board Dia
gnostic
(OBD
) (from m.
y. 2000
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.2

01-83

Malfunction message "dEF" on trip odometer
display
If the control module in the instrument cluster
detects a malfunction in its permanent memory,
the letters "dEF" will appear on the trip odometer
display.

- If "dEF" is indicated on display, replace
instrument cluster Page 90
-27
.

Notes for replacing instrument cluster

Do not disassemble instrument cluster.
If necessary, instrument cluster should be
replaced through the exchange loop.
Fill out a damage report form and return
together with faulty instrument cluster.
Faulty units must always be returned in original
packaging.
The odometer and the Service Reminder
Indicator (SRI) of the replacement instrument
cluster can be adapted using the VAG1551
Scan Tool (ST) Page 01
-133
.
Pa
ge 5 of 99 Instrument cluster with lon
g service life, On Board Dia
gnostic
(OBD
) (from m.
y. 2000
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.2

01-84

On Board Diagnostic (OBD), initiating
program


Additional information

Electrical Wiring Diagrams, Troubleshooting &
Component Locations
Service tools handbook
Parts catalog
Pa
ge 6 of 99 Instrument cluster with lon
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gnostic
(OBD
) (from m.
y. 2000
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.2

01-85

Safety precautions


If special testing equipment is required
during road test, note the following:

WARNING!

Adhere to the following to avoid risk of
accident during measurements while driving
and road tests:
Only use VAS5051 or VAG1551 to read out
measuring value blocks. The tester must be
secured to the rear seat and operated from
there by a second technician.

To reduce the risk of personal injury and/or
damage of electric and electronic
components, always observe the following:
Always switch ignition off before connecting or
disconnecting test/measurement tools.
It is possible that the control module will
recognize a malfunction and store a DTC during
some tests. After completing all tests and
repairs, DTC memory should therefore be
checked and erased if necessary.
Always switch ignition off before disconnecting
Pa
ge 7 of 99 Instrument cluster with lon
g service life, On Board Dia
gnostic
(OBD
) (from m.
y. 2000
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.2

or connecting battery. Failure to do so may
damage a control module.
Pa
ge 8 of 99 Instrument cluster with lon
g service life, On Board Dia
gnostic
(OBD
) (from m.
y. 2000
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.2

01-86

Test requirements:

Check fuse for function according to wiring
diagram.
Always check coding of instrument cluster
according to code table Page 01
-112
.

Connect VAS5051 tester or VAG1551 scan tool
Page 01
-241
.

Switch on ignition.

Notes:
If nothing is indicated on display, check voltage
supply for VAG 1551 scan tool according to
wiring diagram.
Additional instructions can be called up via the
HELP button on the scan tool.
The button is used for advancing through the
program sequence.

An incorrect entry can be canceled using the C
button.
Pa
ge 9 of 99 Instrument cluster with lon
g service life, On Board Dia
gnostic
(OBD
) (from m.
y. 2000
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.2

Function 00 "Automatic test sequence" can be
performed in operating mode 1 "Rapid data
transfer". This automatically checks all control
modules installed in the vehicle.
Pa
ge 10 of 99 Instrument cluster with lon
g service life, On Board Dia
gnostic
(OBD
) (from m.
y. 2000
)
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.2