Automatic transmission control unit (TCU) for VW Passat B5
Connector A (14-pin)
| Contact number | Destination |
|—|—|
| 1 | Throttle Position Sensor |
| 2 | Earth |
| 3 | Transmission oil temperature sensor |
| 4 | Automatic transmission input shaft speed sensor |
| 5 | Earth |
| 6 | Automatic transmission output shaft speed sensor |
| 7 | Earth |
| 8 | Not used |
| 9 | Earth |
| 10 | Electronic Engine Control Unit (ECU) |
| 11 | ABS electronic control unit |
| 12 | Torque converter unlocking impulse |
| 13 | Torque Converter Lockup Solenoid |
| 14 | Earth |
Connector B (15-pin)
| Contact number | Destination |
|—|—|
| 1 | Power supply +12 V |
| 2 | Power supply +12 V (after ignition switch) |
| 3 | Earth |
| 4 | Shift Solenoid 4-3 |
| 5 | Shift Solenoid 3-2 |
| 6 | Shift Solenoid 2-1 |
| 7 | Shift Solenoid 1-2 |
| 8 | Torque converter lock-up solenoid |
| 9 | Not used |
| 10 | Not used |
| 11 | Car speed impulse |
| 12 | Automatic transmission output shaft speed pulse |
| 13 | Automatic transmission selector position sensor |
| 14 | Diagnostic interface |
| 15 | Earth |