Understanding differences between Audi A4 clusters and the compatibility issues

[audifirst]

Originally Posted by tavy Hello from Romania, my English is not so good but I want to help me with a problem. I had changed the instrument cluster because they do not have board computer.I installed a cluster with trip computer Istrument but I did change the 26 pin to 32 pin, after the change, I noticed that diesel fuel indicator, indicates reverse, if the indicator shows full tank is empty and vice versa.Please help me.My car is an audi a4 b5 tdi 1995 I don't have pin layout in front of me , so one of the pins are wrong

[tavy]

I do not think it was a mistake because the indicator is working well, but reversed, if the fuel sender out and move it up and down, move the pointer. And in the instrument cluster, a single wire coming from the sender, because the other one is ground. Thanks for the reply

[audifirst]

which cluster do you have 1 or 2 originally and which one did you install ?
Here in North America early A4 came in 1996 and had cluster 1

[tavy]

My first cluster was cluster number 1 and now I have cluster number 2 and this custer have immo inside if it matters

[audifirst]

Here is a pin assignment from Cluster 1
Instrument Cluster Multi-Pin Connector Terminal Assignments, through MY 1997

26-Pin Connector, Blue

1 - Open
2 - Signal for buzzer
3 - Terminal 15
4 - Terminal 15
5 - Open
6 - Terminal 61
7 - Parking brake/brake system malfunction
8 - ABS (input signal)
9 - Airbag (input signal)
10 - CAT
11 - Open
12 - Open
13 - Parking light, right
14 - Ignition switch, S-contact
15 - Chime signal
16 - Open
17 - Open
18 - Oil pressure 1.8 bar
19 - Terminal 58d
20 - Coolant level
21 - Turn signal, right
22 - Headlight high beams
23 - Speedometer Vehicle Speed Sensor (VSS) (checking → Chapter)
24 - Brake fluid
25 - Brake pads
26 - Parking light, left

26-Pin Connector, Yellow

1 - Terminal 58
2 - Terminal 58
3 - Engine RPM signal
4 - Air conditioner compressor
5 - Clock (output)
6 - Speed signal 1
7 - Speed signal 2
8 - Door contact (driver's door)
9 - Terminal 30
10 - Terminal 30
11 - Open
12 - Fuel tank warning
13 - Turn signal, left
14 - Open
15 - Open
16 - Seat belt buckle switch
17 - Open
18 - Terminal 31
19 - Terminal 31
20 - Diagnostic wire
21 - Open
22 - Open
23 - Open
24 - Open
25 - Sender for fuel gauge
Checking → Chapter
26 - Engine coolant temperature sensor
Checking → Chapter

20-Pin Connector, Black
1 - Fuel consumption signal
2 - Open
3 - Open
4 - Open
5 - Outside air temperature
6 - Selector lever display
7 - Open
8 - Open
9 - Coolant level
10 - Hydraulic pressure
11 - Trip computer - Reset
12 - Radio/Telephone - Clock
13 - Radio/Telephone - Data
14 - Trip computer (forward sequence)
15 - Radio/Telephone - Enable
16 - Rear lights/headlight low beams
17 - Open
18 - Trip computer (reverse sequence)
19 - Brake lights
20 - Open

4-Pin Connector, Black
1 - Oil temperature sensor
2 - Open
3 - Open
4 - Open

[audifirst]

here is for cluster 2

Instrument Cluster Terminal Assignments, cluster 2

32-Pin Connector for Basic Functions, Blue
1 - Terminal 15
2 - Turn signal, right
3 - Speedometer output 1
4 - Open
5 - Sender for fuel gauge
6 - Airbag
7 - Terminal 31 sensor Ground (GND)
8 - Coolant temperature
9 - Terminal 31 load Ground (GND)
10 - Oil pressure switch
11 - Engine speed (RPM) signal
12 - Terminal 61
13 - CAT
14 - Self leveling suspension
15 - Terminal 58d
16 - Malfunction Indicator Lamp (MIL)
17 - High beam
18 - Turn signal, left
19 - ABS
20 - Terminal 58s
21 - Door contact (driver's door)
22 - Engine coolant low
23 - Terminal 30
24 - Terminal 31 load Ground (GND)
25 - K-wire
26 - Parking light, right
27 - Parking light, left
28 - Speedometer (input)
29 - Brake fluid level/pressure
30 - S-contact
31 - Seat belt buckle
32 - Electronic Stability Program (ESP)

32-Pin Connector for Additional Functions, Green
1 - Open
2 - Open
3 - Open
4 - Open
5 - W-wire
6 - Tailgate (Lowline model only)
7 - Brake pad (Highline model only)
8 - Input for outside buzzer control (currently not assigned)
9 - Input for outside chime control (currently not assigned)
10 - Low fuel level warning-output signal for Engine Control Module (ECM)
11 - Standing time output
12 - Air conditioning cutout
13 - Parking brake
14 - Electronic throttle
15 - Side marker light
16 - Open
17 - Open
18 - Open
19 - Open
20 - Open
21 - Oil temperature
22 - Open
23 - Open
24 - Open
25 - Open
26 - Open
27 - Open
28 - Open
29 - Open
30 - Speedometer output 2
31 - Open
32 - Open

20-Pin Connector for Multi-Function Display, Red
1 - Fuel consumption signal
2 - Open
3 - Open
4 - Open
5 - Outside air temperature
6 - Selector lever display
7 - Open
8 - Open
9 - Washer fluid
10 - Hydraulic pressure
11 - Trip computer reset
12 - Clock signal for radio frequency display
13 - Data signal for radio frequency display
14 - Trip computer (forward sequence)
15 - Enable signal for radio frequency display
16 - Tail lights/headlight low beam (indicator lights)
17 - Open
18 - Trip computer (reverse sequence)
19 - Brake lights
20 - Open

[audifirst]

here is for cluster 3

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
17 - High beam
18 - Left turn signal
19 - not occupied
20 - Terminal 58s
21 - Driver door contact
22 - Low coolant
23 - Terminal 30
24 - Terminal 31 (load Ground (GND))
25 - Consumption signal
26 - Right parking light
27 - Left parking light
28 - Tachometer input
29 - Brake
30 - S-contact
31 - Tachometer output 2
32 - ESP/ASR

Green 32-Pin Multi-Pin Connector for Auxiliary Functions
1 - Door contact (all doors)
2 - Transponder 1
3 - not occupied
4 - not occupied
5 - W-wire
6 - Tailgate
7 - Right turn signal
8 - External buzzer
9 - External gong
10 - Airbag
11 - Stand-still time output
12 - Terminal 61
13 - Parking brake/BRAKE
14 - CHECK
15 - Oil level/oil temperature
16 - not occupied
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

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
17 - Left board computer
18 - Right board computer
19 - Board computer, reset
20 - not occupied
21 - not occupied
22 - not occupied
23 - Button branch 1 navigation
24 - Button branch 2 navigation
25 - Button branch Telematic
26 - not occupied
27 - not occupied
28 - not occupied
29 - not occupied
30 - not occupied
31 - not occupied
32 - not occupied

Hopefully that will answer most questions for pin assignment

[tavy]

i have the pinout thanks

[Latya]

Welcome!
A4 cluster fit in audi80 B4?

[Aleks]

Hi!
I´m new to this forums, but i have a quick question!
I have a -97 A4, with cluster number 1, but without the LCD and with 4 gauges...
Is it possible to swap it for a -98 cluster with 6 gauges and LCD?