AUDI A4 1999 B5 / 1.G Instrument Cluster OBD From Model Year 1999 User Guide

01-9

On Board Diagnostic (OBD) functions
The following functions are possible:
02 - Check DTC Memory Page 01
-10

03 - Output Diagnostic Test Mode Page 01
-15


05 - Erase DTC Memory Page 01
-20

06 - End Output Page 01
-22

07 - Code Control Module Page 01
-23

08 - Read Measuring Value Block Page 01
-27


10 - Adaptation Page 01
-32

Pa
ge 11 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

01-10

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.
Pa
ge 12 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

01-11

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).
Pa
ge 13 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

01-12
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
)
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

01-13

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
)
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

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
)
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

01-14

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

01-15

Output Diagnostic Test Mode (scan tool
function 03)


Notes:

Output Diagnostic Test Mode may only be
carried out on a stationary vehicle with the
engine off.
Trace any faults identified by the Output
Diagnostic Test Mode, replace the instrument
cluster if necessary.

The function "Output Diagnostic Test Mode"
cycles all the control elements in the
instrument cluster sequentially, if they are
installed and coded.
Concurrent testing of the display ranges of all
the analog indicators (coolant temperature
gauge, tachometer, speedometer and fuel
gauge).
Activation of the mini-check indicator lights.
Activation of the seat belt warning lamp.
Activation of the chime.
Pa
ge 18 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

Segment check of the multi-function display
and/or the LCD odometer.
Activation of the instrument cluster lights and
dimmer.
Coolant excess temperature test
Pa
ge 19 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

01-16

Notes:

The instrument cluster lighting test can only be
carried out with the lights on.
The coolant excess temperature test activates
the A/C compressor safety shut-off.

Initiating Output Diagnostic Test Mode

Note:
The units displayed are country specific.
Rapid data transfer
HELP
Select function XX

Indicated on display
- Press buttons -0- and -3- to select "Output Diagnostic Test Mode"
function 03.
Rapid data transfer
Q
03 - Output Diagnostic Test Mode

Indicated on display
- Press -Q- button to confirm input.
This will start the Output Diagnostic Test Mode for the analog
instruments (displays).
Output Diagnostic Test Mode Analog Indicators

Indicated on display
Pa
ge 20 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