wiring diagram AUDI A4 2000 B5 / 1.G Instrument Cluster OBD From Model Year 1999 Workshop Manual

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
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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
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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.
Pa
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.1

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
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
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pair&id=AUDI.B5.EE01.01.1

01-13

DTC
Possible cause
Corrective action
VAG1551 scan tool
display
00667
Ambient-Temperature
Signal

Open/Short circuit
to B+
Short circuit to
Ground Vehicles without air conditioning:

Open circuit or short circuit
Outside air temperature sensor -G17-
faulty Vehicles without air conditioning:
- Trace malfunction Electrical Wiring Diagrams,
Troubleshooting & Component Locations
- Replace -G17-.
Vehicles with air conditioning:

Open circuit or short circuit
A/C control head -E87- faultyVehicles with air conditioning:
- Trace malfunction Electrical Wiring Diagrams,
Troubleshooting & Component Locations
- Carry out OBD of air conditioning system
Repair Manual, Heating & Air Conditioning, Repair Group 01

00771
Fuel Level Sensor-G

Open/Short circuit
to B+
Short circuit to
Ground
Open circuit or short circuit between
sender for fuel gauge -G- and
instrument cluster
Sender for fuel gauge -G- faulty- Trace malfunction Electrical Wiring Diagrams,
Troubleshooting & Component Locations
- Replace -G-.
Pa
ge 15 of 74 Instrument cluster, On Board Dia
gnostic
(OBD
) (throu
gh M.Y. 1999
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.1

00779
Outside Air
Temperature Sensor-
G17

Open/Short circuit
to B+
Short circuit to
Ground
Open circuit or short circuit
Outside air temperature sensor --G17-
faulty - Trace malfunction Wiring Diagrams,
Troubleshooting & Component Locations
- Replace -G17-.
Pa
ge 16 of 74 Instrument cluster, On Board Dia
gnostic
(OBD
) (throu
gh M.Y. 1999
)
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p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.01.1

01-14

01039
ECT Sensor-G2

Open/Short
circuit to B+
Short circuit to
Ground (GND)
Open circuit or short circuit between Engine Coolant
Temperature Sensor (ECT) -G2- and instrument
cluster
ECT sensor -G2- faulty- Trace malfunction Electrical Wiring
Diagrams, Troubleshooting & Component
Locations
- Replace -G2-.
01402
Data Wire from
Navigation

Incorrect signal
Open circuit in clock enable or data wire
Navigation/instrument cluster interface
malfunctioning
Malfunction caused by electromagnetic interference
inside and outside vehicle Repair Manual Radio, Telephone,
Navigation, Repair Group 97 - Check data wire for damage.
- Check causes for electromagnetic
malfunctions.
65535
Control Module
Malfunctioning
Instrument cluster faulty- Replace instrument cluster Page 90
-
1 .
Pa
ge 17 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