| Number | X-pin, colour | Description |
|---|---|---|
| X2421 | 9-pin, grey | Plug connector DDE control unit II/slave Module 1 |
| X2422 | 24-pin, grey | Plug connector DDE control unit II/slave Module 2 |
| X2423 | 52-pin, grey | Plug connector DDE control unit II/slave Module 3 |
| X2425 | 9-pin, grey | Plug connector DDE control unit II/slave Module 5 |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Voltage supply terminal 15/30 | Fuse carrier, engine electronics |
| 2 | Not used | ||
| 3 | Not used | ||
| 4 | M | Ground | Ground connector |
| 5 | M | Ground | Ground connector |
| 6 | M | Ground | Ground connector |
| 7 | E | Connection DDE control unit I/master | DDE control unit I/master |
| 8 | E | Voltage supply terminal 15/30 | Fuse carrier, engine electronics |
| 9 | Not used | ||
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | Not used | ||
| 2 | Not used | ||
| 3 | Not used | ||
| 4 | Not used | ||
| 5 | Not used | ||
| 6 | E/A | Diagnostic link TXD | AGS transmission control unit |
| 7 | Not used | ||
| 8 | Not used | ||
| 9 | Not used | ||
| 10 | Not used | ||
| 11 | Not used | ||
| 12 | Not used | ||
| 13 | A | Signal Changeover valve for exhaust gas recirculation (EGR) 2 | Changeover valve for exhaust gas recirculation (EGR) 2 |
| 14 | Not used | ||
| 15 | Not used | ||
| 16 | Not used | ||
| 17 | Not used | ||
| 18 | Not used | ||
| 19 | Not used | ||
| 20 | A | Signal Changeover valve for exhaust gas recirculation (AGR) | Changeover valve for exhaust gas recirculation (AGR) |
| 21 | Not used | ||
| 22 | Not used | ||
| 23 | Not used | ||
| 24 | Not used | ||
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Supply Hot-film air mass meter I | Hot-film air mass meter I |
| 2 | E | Signal Hot-film air mass meter I | Hot-film air mass meter I |
| 3 | M | Ground Hot-film air mass meter I | Hot-film air mass meter I |
| 4 | E | Signal, camshaft sensor | Hall-effect sensor, camshaft 1 |
| 5 | Not used | ||
| 6 | E | Signal Speed (rpm) sensor | Speed (rpm) sensor |
| 7 | Not used | ||
| 8 | Not used | ||
| 9 | Not used | ||
| 10 | Not used | ||
| 11 | E | Signal Intake air temperature | Hot-film air mass meter I |
| 12 | Not used | ||
| 13 | Not used | ||
| 14 | A | Supply for boost pressure sensor | Boost pressure sensor |
| 15 | E | Signal Boost pressure sensor | Boost pressure sensor |
| 16 | M | Ground Boost pressure sensor | Boost pressure sensor |
| 17 | M | Camshaft sensor ground | Hall-effect sensor, camshaft 1 |
| 18 | Not used | ||
| 19 | M | Shield Speed (rpm) sensor | Speed (rpm) sensor |
| 20 | M | Ground Rail pressure sensor | Rail pressure sensor |
| 21 | Not used | ||
| 22 | Not used | ||
| 23 | Not used | ||
| 24 | Not used | ||
| 25 | Not used | ||
| 26 | Not used | ||
| 27 | Not used | ||
| 28 | Not used | ||
| 29 | Not used | ||
| 30 | Not used | ||
| 31 | M | Ground Speed (rpm) sensor | Speed (rpm) sensor |
| 32 | M | Ground Dual temperature sensor | Dual temperature sensor |
| 33 | E | Signal Rail pressure sensor | Rail pressure sensor |
| 34 | Not used | ||
| 35 | A | Supply Rail pressure sensor | Rail pressure sensor |
| 36 | Not used | ||
| 37 | Not used | ||
| 38 | A | Supply Rail pressure control valve | Rail pressure control valve |
| 39 | Not used | ||
| 40 | Not used | ||
| 41 | Not used | ||
| 42 | A | Speed signal | DDE control unit I/master |
| 43 | Not used | ||
| 44 | Not used | ||
| 45 | Not used | ||
| 46 | E/A | CAN interface CAN-HIGH (CAN-H) | DDE control unit I/master |
| 47 | E/A | CAN interface CAN-LOW (CAN-L) | DDE control unit I/master |
| 48 | M | Shield CAN-bus connector | CAN-bus connector |
| 49 | Not used | ||
| 50 | Not used | ||
| 51 | Not used | ||
| 52 | Not used | ||
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Supply Injectors 4 and 7 | Injectors 4 and 7 |
| 2 | Not used | ||
| 3 | A | Signal Injector 7 | Injector 7 |
| 4 | A | Supply Injectors 1 and 6 | Injectors 1 and 6 |
| 5 | A | Signal Injector 1 | Injector 1 |
| 6 | Not used | ||
| 7 | A | Signal Injector 6 | Injector 6 |
| 8 | Not used | ||
| 9 | A | Signal Injector 4 | Injector 4 |