2000 AUDI A4 display

90-26

Malfunction message "dEF" on trip
odometer display

If the control module in the instrument cluster
detects a malfunction in its permanent memory,
the letters "dEF" will appear on the trip odometer
display.

- If "dEF" is indicated on display, replace
instrument cluster Page 90
-27
.
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90-27

Instrument cluster, removing and
installing


Notes:

Do not disassemble instrument cluster.
Removing the steering wheel is not required.
For clarity, the steering wheel does not appear
in the following illustrations.
Check DTC memory before removing the
instrument cluster Page 01
-91
.

Also check and write down values of the service
display and the odometer reading via the
VAG1551 scan tool Page 01
-133
.
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90-35


17 - Transponder 2
18 - CAN high speed (powertrain) (high +)
19 - CAN high speed (powertrain) (low -)
20 - CAN high speed (powertrain) (screen)
21 - ABS
22 - CAN low speed (comfort) (high +)
23 - CAN low speed (comfort) (low -)
24 - CAN low speed (comfort) (screen)
25 - Engine lid
26 - not occupied
27 - Belt buckle
28 - K-wire
29 - Outside temperature -input
30 - not occupied
31 - Selector range display
32 - not occupied
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90-36


Gray 32-pin multi-pin connector for multi-function display
1 - Menu selection switch (menu)
2 - Menu selection switch (out A)
3 - Menu selection switch (out B)
4 - Menu selection switch (Enter)
5 - CAN high speed display (high +)
6 - CAN high speed display (low -)
7 - CAN high speed display (screen)
8 - Passenger door contact
9 - Right rear door contact
10 - Left rear door contact
11 - Enable
12 - Clock
13 - Data
14 - Brake light
15 - Windshield washer fluid level
16 - Rear lights/low beams
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90-38

Engine speed signal, checking

If a malfunction of the RPM display at tachometer
is detected, signal at the tachometer must be
checked.

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

- Read Measuring Value Block Page 01
-
114
.

- Select display group number 001 and perform a
road test.
If the speed appears on the VAG1551 Scan Tool
display but not via the speedometer in instrument
cluster, 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
.
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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.
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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
.
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90-44

Consumption signal, checking


Special tools and equipment

VAG1526 multimeter
VAG1598 test box with VAG1598/25 adapter
VAG1594 connector test kit
Test box for the individual Engine Control
Module (ECM)

- Set display indicator of board computer to
current consumption (1/100 km),

- Start engine and perform a road test.

- Observe consumption display in instrument
cluster.
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