1997 AUDI A4 Instrument Cluster OBD From Model Year 2000 Workshop Manual

01-100

VAG 1551 scan
tool display Possible causes
Corrective action
01336
Comfort system
data-BUS

faulty
in single wire
mode
Open circuit or short circuit to a control module in
comfort system data-BUS
A control module in the comfort system data-BUS
is incorrect, that is, the control module does not
support CAN
A control module that supports CAN is not
indicated with a "1" in measuring value block
Page 01
-131
.
During adaptation of the instrument cluster, a
control module that supports CAN was not
concurrently adapted
Data bus is operating on only one wire (this can
cause EMV problems) - Locate malfunction using wiring diagram
- Repair open circuit
- Replace control module with a control
module that supports CAN
- Select adaptation channel 61 and input the
correct adaptation value Page 01
-187
.
- Check data exchange Page 01
-196
.
01402
Data wire from
navigation

Unplausible
signal
Open circuit in clock, enable or data wire
Problem in interface between navigation and
instrument cluster
Disturbance due to electromagnetic radiation
inside and outside vehicle Repair Manual, Radio,
Telephone,Navigation, Repair Group 91
- Check cabling of data wires for damage
- Check for cause of electromagnetic
disturbance
- Repair open circuit
65535
Control module Instrument cluster faulty
- Replace instrument cluster Page 90
-27
.
Pa
ge 25 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

faulty
Pa
ge 26 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

01-101

Output Diagnostic Test Mode (scan tool
function 03)


Notes:

Output Diagnostic Test Mode is only possible
when vehicle is stationary and engine is not
running!
If malfunctions are found during output
Diagnostic Test Mode, determine cause of
malfunction and replace instrument cluster if
necessary.

During the "output Diagnostic Test Mode"
function, all actuators that are installed in the
instrument cluster and coded are activated in
sequence.
There is also a simultaneous parallel sweep
through the indicator range of all analog display
instruments (Engine Coolant Temperature
(ECT) gauge, tachometer, speedometer, fuel
gauge)
Activation of warning lamps
Activation of seat belt warning light

Pa
ge 27 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

Activation of chime
Segment test of driver information system, LCD
clock/date display, and LCD trip odometer and
daily odometer.
Pa
ge 28 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

01-102

Test of instrument cluster lighting, including
dimmer

Note:
Test can only be performed with lights switched
on.

Initiating output Diagnostic Test Mode:
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -3-. This selects "output Diagnostic Test Mode
(DTM)", function 3.
Rapid data transfer
Q
03 - Output Dia
gnostic Test Mode

Indicated on display:
- Press -Q- button to confirm input. Output Diagnostic Test Mode for
analog displays is initiated immediately.
Output Diagnostic Test Mode Analo
g displa
ys

Indicated on display:
Pa
ge 29 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

01-103
The following tests are performed
simultaneously:

Sweep of coolant temperature needle through
entire display range
Sweep of tachometer needle through entire
display range
Sweep of speedometer needle through entire
display range
Sweep of fuel gauge needle through entire
display range
After sweep of display ranges, the following fixed
values are displayed:

Engine Coolant Temperature (ECT)
gauge:
1/2
Tachometer: 3000 RPM

Speedometer: 62 MPH
Fuel gauge:
1/2

Note:
Switching ignition on and off will stop any needle
Pa
ge 30 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

sweep that has started.

-
Press button.
Pa
ge 31 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

01-104

Output Diagnostic Test Mode Warnin
g lamp test for instrument cluste
r

Indicated on display:
All lamps are switched on that are activated by the processor.
-
Press button.
Output Diagnostic Test Mode Seat belt warnin
g light -K19

Indicated on display:
Seat belt warning light is activated.
Note:
Depending on options/versions, the seat belt warning light may be
activated by the control module coding, that is, if this actuator test is
omitted, the warning light is not active.
-
Press button.
Pa
ge 32 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