Instruments Audi A8 D2

Contact corrosion!

With the extensive use of aluminum construction, corrosion caused by contact between dissimilar metals may result if the wrong fastening components (screws, bolts, nuts, washers, rivets, plugs, grommets, adhesives, etc.) are installed.

For this reason, the manufacturer only installs fastening components that have a special surface coating, recognized by its greenish color, and only uses rubber parts, plastic parts and adhesives that are electrically non-conductive.

These fasteners must be stored separately from other fasteners.

These parts, compatible for use with aluminum, are also available as replacement parts.

Use only Genuine Parts!

If there is any doubt about whether the old parts are suitable for re-use, always install new replacement parts.

All accessories must be approved by Audi of America, Inc.

Damage from contact corrosion caused by improper assembly with unsuitable parts is NOT covered under warranty!

Instrument cluster

Note. After connecting the battery be sure to reactivate the radio, clock, power windows and engine according to instructions in the Owner's Manual.

Display "DEF" in odometer/trip recorder

If the instrument cluster control module recognizes a malfunction in the DTC memory "dEF" is displayed.

1. If "dEF" is displayed, replace the instrument cluster. See «INSTRUMENT CLUSTER, REMOVING AND INSTALLING»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#instruments__instrument-cluster-removing-and-installing) .

Instrument cluster, removing and installing

Note. Do not disassemble the instrument cluster. It is not necessary to remove the steering wheel. The steering wheel is shown removed in the following illustrations for clarity only. Before removing the instrument cluster, check DTC memory. See DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING (SCAN TOOL FUNCTION 02) . It is also necessary to note and write down the values for the Service Reminder Indicator and the odometer display using the VAG 1551 scan tool. See ADAPTATION (SCAN TOOL FUNCTION 10) .

Removing

1. Using steering column adjustment, pull steering wheel out as far as it will go and move it to the lowest position.
2. Push both covers -arrows- in and remove cover from instrument cluster.
3. Remove both screws.
4. Pull instrument cluster out toward front.
5. Cut cable ties on back of instrument cluster.
6. Release retaining tabs on connectors and disconnect.

Installing

1. Re-connect electrical connectors and secure wiring at the back side of instrument cluster with cable ties.
2. Install in reverse order of removal.
3. Check instrument cluster function after installation.
4. Code the instrument cluster and perform adaptation of odometer display and service reminder indicator.

Note. After replacing the instrument cluster, be sure to follow notes. See INSTRUMENT CLUSTER, VALUES TO BE ENTERED WHEN REPLACING .

Removing and installing instrument cluster light bulbs

1. Remove instrument cluster. See «INSTRUMENT CLUSTER, REMOVING AND INSTALLING»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#instruments__instrument-cluster-removing-and-installing) .
2. At the back of the instrument cluster, remove control lights 5 to 12 using a small screwdriver and turning to the left.
3. Install new bulb and secure again using screwdriver.

Instrument cluster connector assignments (vehicles 1995 to 1996)

Note. The following list refers to (Scheme 173).

1. Multi-pin connector for basic functions (26-pin - yellow)
2. Multi-pin connector for basic functions (26-pin - red)
3. Multi-pin connector for basic functions (26-pin - green)
4. Multi-pin connector for voltage supply (6-pin - white)

Identifying Instrument Cluster Connector Assignments (1995 To 1996). Scheme 173

Indicator and warning light assignments, USA vehicles

Note. The following list refers to see scheme 5.

1. Generator (GEN) warning light
2. Side marker lights
3. Brake and parking brake warning light
4. ABS warning light
5. Seat belt warning light 1.1 W
6. Malfunction Indicator Light (MIL) 1.1 W
7. Rear hatch/trunk lid ajar warning light 1.1 W
8. Airbag Malfunction Indicator Light (MIL) 1.1 W
9. Headlight high beam indicator light 1.1 W
10. Door open indicator light 1.1 W
11. Open
12. Anti-Slip Regulation (ASR) and Electronic Stability Program (ESP) - 1.1 W

Note. Control lights 1-4 in the upper light bar are LEDs which cannot be replaced.

Indicator and warning light assignments, CANADA vehicles

Note. The following list refers to see scheme 6.

1. Generator (GEN) warning light
2. Side marker lights
3. Brake and parking brake warning light
4. ABS warning light
5. Seat belt warning light 1.1 W
6. Malfunction Indicator Light (MIL) 1.1 W
7. Rear hatch/trunk lid ajar warning light 1.1 W
8. Airbag Malfunction Indicator Light (MIL) 1.1 W
9. Headlight high beam indicator light 1.1 W
10. Door open indicator light 1.1 W
11. Open
12. Anti-Slip Regulation (ASR) and Electronic Stability Program (ESP) - 1.1 W

Note. Control lights 1-4 in the upper light bar are LEDs which cannot be replaced.

Multi-pin connector -A- (26-pin - yellow) assignments

Note. The following list refers to see scheme 7.

1. Fuel level sensor signal
2. Fuel level sensor Ground (GND)
3. Door contact, driver's door
4. Ignition key, terminal 86s
5. Brake fluid level and hydraulic fluid level
6. Seat belt switch
7. Washer fluid level
8. Parking light, right
9. On board computer reset, left
10. Board computer reset, right
11. Board computer reset
12. Temperature sensor Ground (GND)
13. Temperature switch "On"
14. Outside air temperature sensor/AC system
15. Open
16. Audio signal "On"
17. Engine coolant temperature sensor signal
18. Engine coolant level warning
19. Brake light
20. Backup light/headlight
21. Parking light, left
22. Coolant fan third speed
23. Light brightness sensor output
24. Light brightness sensor
25. Outside temperature sensor Ground (GND)
26. A/C compressor "Off

Multi-pin connector -B- (26-pin - red) assignments

Note. The following list refers to see scheme 8.

1. Open
2. Open
3. Open
4. Open
5. Open
6. Open
7. Oil pressure 1.2 bar
8. Open
9. Transmission range indicator
10. Open
11. Open
12. Hydraulic pressure
13. Time signal as of ABS system 5.3 (open with ABS system 5.0)
14. Telephone enable
15. Telephone - Clock
16. Telephone data
17. Open
18. RPM signal
19. Fuel consumption signal
20. Open
21. Open
22. Speedometer vehicle speed signal (output 2)
23. Speedometer vehicle speed signal (output 1)
24. Speedometer vehicle speed signal sensor signal (input)
25. Brake pad wear indicator signal
26. K-wire

Multi-pin connector -C- (26-pin - green) assignments

Note. The following list refers to see scheme 9.

1. Open
2. Open
3. Open
4. Open
5. Open
6. Airbag
7. ABS
8. Door lock (output)
9. Turn signal, left
10. Open
11. Open
12. Open
13. Open
14. Open
15. ASR
16. OBD II/ Door lock (up to m.y. 1997)
17. Trailer warning light
18. Open
19. High beam
20. Parking brake warning light/brake fluid level and brake pressure
21. Generator warning light
22. Turn signal, right
23. Open
24. Open
25. Airbag (open circuit)
26. ABS (open circuit)

Multi-pin connector -D- (6-pin - white) assignments

Note. The following list refers to see scheme 10.

1. Terminal 30
2. Terminal 31
3. Illumination (3 W)
4. Illumination for console (40 W)
5. Terminal 58
6. Terminal 15

Instrument cluster connector assignments (vehicles 1997 and on)

Note. The following list refers to (Scheme 174).

1. Multi-pin connector for basic functions (26-pin yellow)
2. Multi-pin connector for basic functions (26-pin - red)
3. Multi-pin connector for basic functions (26-pin - green)
4. Multi-pin connector for voltage supply (6-pin - white)
5. Multi-pin connector for transmitter clock (4-pin - white)

Identifying Instrument Cluster Connector Assignments (1997 & Up). Scheme 174

Note. The following list refers to see scheme 12.

1. Generator (GEN) warning light
2. Side marker lights
3. Brake and parking brake warning light
4. ABS warning light
5. Seat belt warning light 1.1 W
6. Malfunction Indicator Light (MIL) 1.1 W
7. Open
8. Airbag Malfunction Indicator Light (MIL) 1.1 W
9. Headlight high beam indicator light 1.1 W
10. Open
11. Open
12. Anti-Slip Regulation (ASR) and Electronic Stability Program (ESP) - 1.1 W

Note. Control lights 1-4 in the upper light bar are LEDs which cannot be replaced.

Note. The following list refers to see scheme 13.

1. Generator (GEN) warning light
2. Side marker lights
3. Brake and parking brake warning light
4. ABS warning light
5. Seat belt warning light 1.1 W
6. Malfunction Indicator Light (MIL) 1.1 W
7. Open
8. Airbag Malfunction Indicator Light (MIL) 1.1 W
9. Headlight high beam indicator light 1.1 W
10. Open
11. Open
12. Anti-Slip Regulation (ASR) and Electronic Stability Program (ESP) - 1.1 W

Note. Control lights 1-4 in the upper light bar are LEDs which cannot be replaced.

Note. The following list refers to see scheme 14.

1. Fuel level sensor signal
2. Fuel level sensor Ground (GND)
3. Door contact, driver's door
4. Ignition key, terminal 86s
5. Brake fluid level and hydraulic fluid level
6. Seat belt switch
7. Washer fluid level
8. Parking light, right
9. On board computer reset, left
10. Board computer reset, right
11. Board computer reset
12. Temperature sensor Ground (GND)
13. Fuel volume sensor (reserve)
14. Outside air temperature sensor/AC system
15. Open
16. Audio signal "On"
17. Engine coolant temperature sensor signal
18. Engine coolant level warning
19. Brake light
20. Backup light/low beam headlight
21. Parking light, left
22. Coolant fan third speed
23. Engine oil temperature Ground (GND)
24. Engine oil temperature
25. Outside temperature sensor Ground (GND)
26. A/C compressor "Off"

Note. The following list refers to see scheme 15.

1. Trunk lid
2. Door contact for driver's door
3. Door contact, left rear
4. Door contact, right rear
5. Fuel level (for OBD II)
6. Open
7. Oil pressure 1.2 bar
8. Open
9. Transmission range indicator
10. Open
11. Auxiliary heater (remote control input)
12. Hydraulic pressure
13. Time signal as of ABS system 5.3 (open with ABS system 5.0)
14. Open
15. Open
16. Open
17. Summer/Winter
18. RPM signal
19. Fuel consumption signal
20. Auxiliary heater
21. Open
22. Speedometer vehicle speed signal (output 2)
23. Speedometer vehicle speed signal (output 1)
24. Speedometer vehicle speed signal sensor signal (input)
25. Brake pad wear indicator signal
26. K-wire

Note. The following list refers to see scheme 16.

1. Open
2. Open
3. Open
4. Open
5. Open
6. Airbag
7. ABS
8. Door lock (output)
9. Turn signal, left
10. Open
11. Open
12. Open
13. Open
14. Open
15. ASR
16. OBD II
17. Trailer turn signal lights
18. Open
19. High beam
20. Parking brake warning light
21. Generator (GEN) warning light
22. Turn signal, right
23. Open
24. Open
25. Airbag (active)
26. ABS (Sila)

Multi-pin connector -D- (6-pin - white) assignments for voltage supply

Note. The following list refers to see scheme 17.

1. Terminal 30
2. Terminal 31
3. Illumination (3 W)
4. Illumination for console (40 W)
5. Terminal 58
6. Terminal 15

Multi-pin connector -E- (4-pin) assignments for transmitter clock

Note. The following list refers to see scheme 18.

1. Transmitter clock signal
2. Transmitter clock 5V
3. Open
4. Radio/Navigation clock ground

Radio/navigation clock, servicing

Note. The radio/navigation clock can be identified by an antenna symbol in the left upper display for the clock.

1. Remove multi-function trip computer. See «INSTRUMENT CLUSTER, REMOVING AND INSTALLING»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#instruments__instrument-cluster-removing-and-installing) .
2. Remove both screws -3- and remove radio/navigation clock.
3. Remove the bracket for radio/navigation clock -1- behind the center console through the opening for the multifunction trip computer.

Vehicle speed signal, checking

If the vehicle speed signal is faulty, first determine whether the signal reaches the speedometer.

1. Connect VAG 1551 or VAG 1552 scan tool. See «VAG 1551, VAG 1552 SCAN TOOL (ST), CONNECTING AND SELECTING FUNCTIONS»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#on-board-diagnostic-obd-instrument-cluster-headlights) .
2. Read measuring value block. See «READ MEASURING VALUE BLOCK (SCAN TOOL FUNCTION 08)»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#on-board-diagnostic-obd-instrument-cluster-headlights__read-measuring-value-block-scan-tool) .
3. Select channel number 001 and road test vehicle. If the vehicle speed is shown in the display of the scan tool, the instrument cluster is faulty and must be replaced. If the scan tool does not show the vehicle speed in the display, check the multi-pin connector at the instrument cluster.
4. Remove instrument cluster. See «INSTRUMENT CLUSTER, REMOVING AND INSTALLING»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#instruments__instrument-cluster-removing-and-installing) .
5. Connect VAG 1598 test box with VAG 1598/4 adapter to red 26-pin connector.
6. Using Fluke 83 multimeter, measure voltage between socket 24 and vehicle ground.
7. Move vehicle a little forward and backward. Specified values: voltage must increase from 0V to approx. 12V and then decrease to 0V (pulsating direct voltage)
8. If not, check wiring to vehicle speed sensor. See appropriate System Wiring Diagram article.
9. If the wiring is OK, replace vehicle speed sensor.

Fuel gauge sender -G- signal, checking

If the fuel volume indication is faulty, first determine whether the signal reaches the instrument cluster.

1. Connect VAG 1551 or VAG 1552 scan tool. See «VAG 1551, VAG 1552 SCAN TOOL (ST), CONNECTING AND SELECTING FUNCTIONS»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#on-board-diagnostic-obd-instrument-cluster-headlights) .
2. Read measuring value block. See «READ MEASURING VALUE BLOCK (SCAN TOOL FUNCTION 08)»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#on-board-diagnostic-obd-instrument-cluster-headlights__read-measuring-value-block-scan-tool) .
3. Select channel number 002. If the fuel volume is shown in the display of the scan tool, the instrument cluster is faulty and must be replaced. If the scan tool does not show fuel volume in the display, check the multi-pin connector at the instrument cluster.
4. Remove instrument cluster. See «INSTRUMENT CLUSTER, REMOVING AND INSTALLING»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#instruments__instrument-cluster-removing-and-installing) .
5. Connect VAG 1598 test box with VAG 1598/4 adapter to yellow 26-pin connector.
6. With Fluke 83 multimeter, measure resistance between socket 1 and socket 2 (ground). Specified values: Tank full: approx. 12 Ohm Tank at reserve I: approx. 154 Ohm Tank at reserve II: approx. 163 Ohm If you do not get these readings: Check wiring to fuel tank sender according to wiring diagram. See appropriate System Wiring Diagram article.
7. If you do not find a fault, replace the fuel tank sender unit.

Fuel consumption signal, checking

This signal is needed for the fuel consumption display in the multi-function indicator.

1. Remove instrument cluster. See «Instrument cluster, removing and installing»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#instruments__instrument-cluster-removing-and-installing) .
2. Disconnect red 26-pin connector from instrument cluster.
3. Connect VAG 1598 test box with VAG 1598/4 adapter to red 26-pin connector.
4. With Fluke 83 multimeter, measure voltage between socket 19 and vehicle ground.
5. Start engine and increase and decrease engine speed continuously between 1000 and 4000 rpm. Specified value for signal from engine control module: 0.3-7.0 V, depending on load If you do not get these readings, the instrument cluster is faulty and must be replaced. See «INSTRUMENT CLUSTER, REMOVING AND INSTALLING»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#instruments__instrument-cluster-removing-and-installing) . If the specifications are not reached
6. Check wiring between engine control module and instrument cluster according to wiring diagram See appropriate System Wiring Diagram article.
7. If you find no wire break or short circuit, replace engine control module.

Engine coolant temperature sensor, checking

If the engine coolant temperature display in the instrument cluster is faulty, check whether the signal reaches the instrument cluster.

1. Connect VAG 1551 or VAG 1552 scan tool. See «VAG 1551, VAG 1552 SCAN TOOL (ST), CONNECTING AND SELECTING FUNCTIONS»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#on-board-diagnostic-obd-instrument-cluster-headlights) .
2. Read measuring value block. See «READ MEASURING VALUE BLOCK (SCAN TOOL FUNCTION 08)»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#on-board-diagnostic-obd-instrument-cluster-headlights__read-measuring-value-block-scan-tool) .
3. Select channel number 003. If the coolant temperature is shown in the display of the scan tool, the instrument cluster is faulty and must be replaced. If also the scan tool does not show the coolant temperature in the display, check the multi-pin connector at the instrument cluster.
4. Remove instrument cluster. See «INSTRUMENT CLUSTER, REMOVING AND INSTALLING»(/audi/a8/d2-1994-1999/remont/gauges-instrument-panels/#instruments__instrument-cluster-removing-and-installing) .
5. Connect VAG 1598 test box with VAG 1598/4 adapter to yellow 26-pin connector.
6. With Fluke 83 multimeter, measure resistance between socket 19 and socket 12 (ground). Specified values: Engine coolant temp. 90 °C (194 °F): approx. 110 Ohm Engine coolant temp. 120 °C (248 °F): approx. 50 Ohm
7. If you do not get these readings, check wiring to engine coolant temperature sensor. See appropriate System Wiring Diagram article.
8. If the wiring is OK, replace engine coolant temperature sensor.

See also:
• DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING (SCAN TOOL FUNCTION 02)
• ADAPTATION (SCAN TOOL FUNCTION 10)
• INSTRUMENT CLUSTER, VALUES TO BE ENTERED WHEN REPLACING
• READ MEASURING VALUE BLOCK (SCAN TOOL FUNCTION 08)
• INSTRUMENT CLUSTER, REMOVING AND INSTALLING