Up-Shift Switch Test
- Disconnect negative battery cable. Remove instrument cluster and up-shift switch. Attach up-shift switch to Vacuum Tester (V.A.G.1368). Attach vacuum pump to tester. Close tester valve No. 1 and turn tester valve No. 2 to (AB) position so vacuum passes through.
- Plug open end of up-shift switch. Measure resistance on up-shift terminals with ohmmeter. Ohmmeter should read zero ohms. If not, replace switch. With a vacuum pump, apply a minimum of 10 in. Hg. Connect ohmmeter to up-shift switch and release vacuum slowly with tester valve No. 1.
- Ohmmeter should read infinite with 7.5 in. Hg applied. If not within specification, adjust up-shift switch by turning adjusting screw clockwise for a lower shift point and counterclockwise for a higher shift point.
80 & 90 MODELS INSTRUMENT PANEL 26-PIN CONNECTOR (WHITE)
| Pin No. |
Identification |
| 1 |
Not Used |
| 2 |
Not Used |
| 3 |
Not Used |
| 4 |
Not Used |
| 5 |
Not Used |
| 6 |
Not Used |
| 7 |
Not Used |
| 8 |
Not Used |
| 9 |
Not Used |
| 10 |
Negative Connection for ABS Light |
| 11 |
Not Used |
| 12 |
Not Used |
| 13 |
Negative Connection for Upshift Light |
| 14 |
Not Used |
| 15 |
Negative Connection for Fuel Gauge |
| 16 |
Positive Connection for Speedometer, Voltage Stabilizer & Warning Lights |
| 17 |
Turn Signal Indicator (Right) |
| 18 |
Output Signal to Cruise Control |
| 19 |
Not Used |
| 20 |
Input from Speed Sensor |
| 21 |
Negative Connection from Instrument Panel Lights, Speedometer, Voltage Stabilizer & High Beam Indicator |
| 22 |
Instrument Panel Light Rheostat, Clock Light (Yellow) Connector Terminal No. 1 & 4 |
| 23 |
Positive Connection to High Beam Indicator Light |
| 24 |
Negative Connection to Engine Control Light |
| 25 |
Negative Connection to Seat Belt Light |
| 26 |
Positive Connection to Seat Belt Light |
80 & 90 MODELS INSTRUMENT PANEL 26-PIN CONNECTOR (YELLOW)
| Pin No. |
Identification |
| 1 |
Positive Connection from Light Switch to Instrument Panel Rheostat |
| 2 |
Negative Connection to Coolant Temperature Gauge |
| 3 |
Positive Connection to Clock Light |
| 4 |
Positive Connection to Pin No. 1 |
| 5 |
Positive Connection to Instrument Panel Rheostat |
| 6 |
Not Used |
| 7 |
Not Used |
| 8 |
Negative Connection to Turn Signal Indicator (Left), Clock Light & Tachometer |
| 9 |
Positive Connection to Flashers |
| 10 |
Negative Connection to Coolant Overheat Light |
| 11 |
Negative Connection to Brake Warning Light |
| 12 |
Not Used |
| 13 |
Negative Connection to Coolant Gauge & Brake Warning Light |
| 14 |
Not Used |
| 15 |
Not Used |
| 16 |
Not Used |
| 17 |
Not Used |
| 18 |
Not Used |
| 19 |
Positive Connection to Clock |
| 20 |
Not Used |
| 21 |
Not Used |
| 22 |
Input Signal for Tachometer |
| 23 |
Negative Connection Coding for Tachometer |
| 24 |
Negative Connection to Oil Press. Warning Light |
| 25 |
Negative Connection to Park Brake Light |
| 26 |
Negative Connection to Brake Fluid Level Indicator |
100, 200 & 200 TURBO MODELS INSTRUMENT PANEL 26-PIN CONNECTOR (BROWN)
| Pin No. |
Identification |
| 1 |
Not Used |
| 2 |
Terminal 15 |
| 3 |
Not Used |
| 4 |
Negative Terminal Coolant Warning Light |
| 5 |
Negative Terminal Boost Pressure Indicator Light |
| 6 |
Negative Terminal Oil Pressure Light |
| 7 |
Not Used |
| 8 |
Terminal 30 Positive |
| 9 |
Speedometer Signal |
| 10 |
Negative Connection Brake Pad Sensor Light |
| 11 |
Terminal 31 |
| 12 |
Input Signal Tachometer |
| 13 |
Not Used |
| 14 |
Negative Terminal Coolant Temperature Gauge |
| 15 |
Not Used |
| 16 |
Not Used |
| 17 |
Not Used |
| 18 |
Not Used |
| 19 |
Not Used |
| 20 |
Not Used |
| 21 |
Not Used |
| 22 |
Not Used |
| 23 |
Not Used |
| 24 |
Terminal 31 |
| 25 |
Not Used |
| 26 |
Not Used |
100, 200 & 200 TURBO MODELS INSTRUMENT PANEL 26-PIN CONNECTOR (BLACK)
| Pin No. |
Identification |
| 1 |
Termional 30 |
| 2 |
Speedometer Signal |
| 3 |
Negative Terminal Fuel Gauge |
| 4 |
Positive Terminal Speedometer |
| 5 |
Positive Terminal Instrument Panel Dimmer |
| 6 |
Positive Terminal Park Brake |
| 7 |
Negative Terminal Park Brake, Control Light |
| 8 |
Negative Terminal Seat Belt Warning Light |
| 9 |
Not Used |
| 10 |
Terminal 31 |
| 11 |
Terminal 15 |
| 12 |
Positive Terminal Turn Signal (Right) |
| 13 |
Negative Terminal ABS |
| 14 |
Not Used |
| 15 |
Positive Terminal Instrument Panel Dimmer |
| 16 |
Not Used |
| 17 |
Not Used |
| 18 |
Not Used |
| 19 |
Not Used |
| 20 |
Not Used |
| 21 |
Not Used |
| 22 |
Not Used |
| 23 |
Not Used |
| 24 |
Negative |
| 25 |
Positive Terminal Turn Signal (left) |
| 26 |
Positive Terminal |
Courtesy of AUDI OF AMERICA, INC.