2000 AUDI A4 fuel

90-40

Signal from sender for fuel gauge -G-,
checking

If a malfunction of the sender for fuel gauge is
detected at instrument cluster, check if the signal
at the instrument cluster is OK.

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

- Read Measuring Value Block Page 01
-
114
.

- Select display group number 2.
If the fuel level appears on the VAG1551 scan
tool display but not via the fuel gauge, the
instrument cluster is faulty and must be
replaced.
If no speed is indicated on the VAG1551 scan
tool display either, the signal must be checked at
multi-function connection at instrument cluster.

- Remove instrument cluster Page 90
-27
.

- Connect VAG1598 tester with VAG1598/25
adapter to the blue 32-pin connector.
Pa
ge 16 of 28 Instrument cluster
(from M.Y. 2000
)
11/20/2002 htt
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yp
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pair&id=AUDI.B5.EE01.90.2

90-41

- Measure resistance (sensor resistance) between
terminal 5 and 7 using VAG1526 multimeter.
Specified values:
Fuel tank empty: approx. 280 Ohm (Front Wheel
Drive/All Wheel Drive)
Fuel tank full: approx. 40 Ohm (Front Wheel
Drive/All Wheel Drive)

- If the specified values are not reached, check
wire connection between instrument cluster and
the sender for fuel gauge -G- (Front Wheel
Drive/All Wheel Drive) according to wiring
diagram.

Electrical Wiring Diagrams, Troubleshooting &
Component Locations
- If there is neither an open circuit nor a short
circuit, check the sender for fuel gauge -G-
(Front Wheel Drive/All Wheel Drive)

- Sender for fuel gauge, checking

Repair Manual, Fuel Supply System, Repair
Pa
ge 17 of 28 Instrument cluster
(from M.Y. 2000
)
11/20/2002 htt
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play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.EE01.90.2

Group 20; sensor for fuel gauge, checking


- If the specified values are met, the malfunction
is in the instrument cluster, meaning that the
instrument cluster must be replaced Page 90
-
27
.
Pa
ge 18 of 28 Instrument cluster
(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.EE01.90.2

90-45
What appears in the consumption display?
1. constant 0.0 L/100 km
Possible short circuit to battery Ground (GND)
in the signal wire.
- Switch ignition off.

- Connect corresponding test box to the Engine
Control Module (ECM).

Repair Manual, Fuel Injection & Ignition,
Repair Group 24; additional signals, checking;
consumption signal for board computer, checking

- Remove instrument cluster Page 90
-27
and
disconnect blue 32-pin connector from
instrument cluster.

- Connect VAG1598 tester with VAG1598/25
adapter to the blue 32-pin connector.

- Connect (+) adapter lead to VAG1598/25 test
box socket 25 using VAG1526 multimeter

Pa
ge 23 of 28 Instrument cluster
(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.EE01.90.2

90-47
2. constant 51 L/100 km
Possible open circuit in the signal wire.
- Switch ignition off.

- Connect test box to Engine Control Module
(ECM).

Repair Manual, Fuel Injection & Ignition,
Repair Group 24; additional signals, checking;
consumption signal for board computer, checking

- Remove instrument cluster Page 90
-27
and
disconnect blue 32-pin connector from
instrument cluster.

- Connect VAG1598 tester with VAG1598/25
adapter to the blue 32-pin connector.

- Connect (+) adapter lead to VAG1598/25 test
box socket 25 using VAG1526 multimeter.

-
Connect (-) adapter lead to the corresponding
test box of Engine Control Module (ECM) and
the corresponding consumption signal socket of
Pa
ge 26 of 28 Instrument cluster
(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.EE01.90.2

90-48

- Connect (+) adapter lead to to the corresponding
test box of the Engine Control Module (ECM)
using VAG1526 multimeter

- Connect (-) adapter lead to battery Ground
(GND).

- Perform a resistance check.
Specification: Display > 9 M Ohm

- If the specified values are reached, the wire
connection is OK.
3. The consumption display has no logical or
fluctuating consumption value.
The consumption display deviates from the
actual fuel consumption.
- Perform adaptation of consumption display
Page 01
-140
.
Pa
ge 28 of 28 Instrument cluster
(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.EE01.90.2