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

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.
Pa
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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.
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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
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) (throu
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)
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yp
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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
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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
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01-28

Display group overview

Display
group Indicated on display
001 1 = Vehicle speed (kmh/MPH)
2 = Engine speed (RPM)
3 = Oil pressure switch 2 < min
002 1 = Odometer (km/mi)
2 = Fuel gauge (liters/gal)
3 = Outside temperature ( C/F) 003 1 = Engine coolant temperature (
C/F) 050 1 = Odometer (km/mi)
2 = Engine speed (RPM)
4 = Engine coolant temperature (
C/F)

Notes:

The display will always show the actual values
from the sensors. Since the instrument panel
displays filters the values, they may differ from
the actual values.
Pa
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01-36


- Disconnect fuel level sensor harness connector (near rear seat back,
under trim in trunk), then perform adaptation of fuel level display.
- Switch ignition off.

- Using test lead, connect VAG1301 resistance tester to fuel level sensor
(see illustration).
- Set VAG1301 to value of 470.
- Wait approx. 4 minutes, switch ignition on and observe fuel gauge.
Pa
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yp
e=re
pair&id=AUDI.B5.EE01.01.1