| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Terminal 50 | Starter 728i, 730i, 740i |
| | | Start relay 750i |
| 2 | E/A | Diagnosis signal TXD | Connector TXD |
| | | |
| 3 | E | Terminal 50 728i, 730i, 740i | Ignition switch 730i, 740i |
| Power supply (+) 750i | | Fuse F114 750i |
| 4 | A | Signal line to DME | DME control unit 728i, 730i, 740i |
| | | Connector, DME control units 750i |
| 5 | E | Terminal 30 | Fuse F26 |
| | | |
| 6 | A | Remote control signal | Passenger's door module |
| | | |
| 7 | M | Ground | Ground connector |
| | | |
| 8 | E | Signal saved | General module |
| | | |
| 9 | E | P/N signal from automatic transmission | Gear position switch |
| | | |
| 10 | A | P/N signal from automatic transmission | Cruise control module 728i, 730i, 740i |
| | | |
| 11 | | Not used | |
| | | |
| 12 | E | Engine speed signal | Connector TD signal |
| | | |
| 13 | E/A | Transmit/receive signal (EWS) | Transmit/receive module (EWS) |
| | | |
| 14 | A | up to 08/1995 Not usedas of 09/1995 Infrared signal | Electrochromic interior rear view mirror |
| | | |
| 15 | A | up to 08/1995 Not used as of 09/1995 Coding signal | Integrated electronic control unit (IKE) |
| | | |