2000 AUDI A4 sensor

90-32

Instrument cluster, terminal
assignments


Blue 32-pin multi-pin connector for basic functions
1 - Terminal 15
2 - Brake pad wear
3 - Tachometer output 1
4 - not occupied
5 - Tank sensor
6 - Tank warning OBD 2
7 - Terminal 31 (sensor Ground (GND))
8 - Coolant temperature
9 - Terminal 31 (load Ground (GND))
10 - Oil pressure 2 (high)
11 - RPM signal
12 - A/C shut-off
13 - E-Gas/glow plug control
14 - Level control
15 - Terminal 58d
16 - Trailer turn signal
Pa
ge 8 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

90-39

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

- Perform an acoustic continuity check of the
sensor and wire using the VAG1526 multimeter
between terminal 28 and socket 9 (load Ground
(GND))
Test
The beep signal of the resistance tester must
switch on and off several times while the vehicle
is rolled slightly forward and backward (approx.
1m)
If the test is not OK, the wire connection to speed
sender must be checked.

- Check wire connection according to wiring
diagram.

Electrical Wiring Diagrams, Troubleshooting &
Component Locations If the wire connection is OK, the speed sender
must be replaced.
Pa
ge 15 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

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

90-42

Signal from Engine Coolant
Temperature (ECT) sensor -G2-,
checking

If a malfunction of the Engine Coolant
Temperature (ECT) gauge is detected at the
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 003.
If the Engine Coolant Temperature (ECT)
appears on the VAG1551 scan tool display but
not by the Engine Coolant Temperature (ECT)
gauge, the instrument cluster is faulty and must
be replaced.
If no Engine Coolant Temperature (ECT) is
indicated on the VAG1551 scan tool display, the
signal must be checked at multi-function
connection at instrument cluster.

- Remove instrument cluster Page 90
-27
.
Pa
ge 19 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

90-43

- Measure resistance (sensor resistance) between
terminal 8 and 7 using VAG1526 multimeter.
Specified values:

Coolant temperature 90 C: approx. 110 Ohm
Coolant temperature 120 C: approx. 50 Ohm If the specified values are not reached, the wire
connection to Engine Coolant Temperature
(ECT) -G2- must be checked.

- Check wire connection according to wiring
diagram.

Electrical Wiring Diagrams, Troubleshooting &
Component Locations If the wire connection is OK, Engine Coolant
Temperature (ECT) -G2- must be replaced.
Pa
ge 21 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