| Pin Number |
Pin Name |
Description (may be empty) |
| 1 | K-Line | Automatic transmission diagnostic (AD4) |
| 2 | GND | |
| 6 | +12V | Accumulator |
| 7 | K-Line | Automatic transmission diagnostic (M) |
| 8 | L-Line or (MIL) Malfunction Indicator Lamp (some old models) | Engine diagnostic (Siemens/Bendix/Renix SPI/MPI) |
| 9 | K-Line or Undirectional (only TX) diagnostic line at 62500bps with open collector (some old models) | Engine diagnostic (Siemens/Bendix/Renix SPI/MPI) |
| 10 | L-Line | Engine diagnostic (Fenix 5, Magneti Marelli 06R, Motronic M4.4.2) |
| 11 | K-Line | Engine diagnostic (Fenix 5, Magneti Marelli 06R, Motronic M4.4.2), ABS, Airbag |

