| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Upper chamber of lumbar support, front passenger's side | Valve block, passenger's lumbar support |
| | | |
| 2 | M | Ground | With electric seat adjustment: Passenger's seat adjustment switch Ground connector |
| | | |
| 3 | M | Ground | Motor, passenger's lumbar support |
| | | |
| 4 | E | Terminal 30 | With electric seat adjustment: Passenger's seat adjustment switch Fuse F70 |
| | | |
| 5 | A | Pump for lumbar support | Valve block, passenger's lumbar support |
| | | |
| 6 | A | Lower chamber of lumbar support, front passenger's side | Valve block, passenger's lumbar support |
| | | |