| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | E | Signal, oxygen sensor heater | Heated oxygen sensor 1 behind catalytic converter |
| | | |
| 2 | | Not used | |
| | | |
| 3 | A | Fuel injector cyl. 1 | Fuel injector cyl. 1 |
| | | |
| 4 | A | Fuel injector cyl. 3 | Fuel injector cyl. 3 |
| | | |
| 5 | A | Fuel injector cyl. 2 | Fuel injector cyl. 2 |
| | | |
| 6 | M | Ground, fuel injector | Ground point |
| | | |
| 7 | E | Signal, secondary air pump stage 2 | Air pump relay |
| | | |
| 8 | A | Defect lamp (USA only) | Instrument cluster |
| | | |
| 9 | | Not used | |
| | | |
| 10 | E | Drive-away protection | General module |
| | | |
| 11 | E | A/C compressor signal | Heating and A/C control module |
| | | |
| 12 | E | Signal, terminal 50 | up to 1994_12 Starter relay as of 1995_01 Transmit/receive module (EWS) |
| | | |
| 13 | | Not used | |
| | | |
| 14 | | Not used | |
| | | |
| 15 | | Not used | |
| | | |
| 16 | | Not used | |
| | | |
| 17 | E | Signal, hot-film air mass meter | Hot-film air mass meter |
| | | |
| 18 | | Not used | |
| | | |
| 19 | A | Signal, oxygen sensor | Heated oxygen sensor 1 in front of catalytic converter |
| | | |
| 20 | M | Crankshaft sensor ground | Crankshaft sensor 1 |
| | | |
| 21 | A | Signal, camshaft sensor | Camshaft Hall sensor |
| | | |
| 22 | | Not used | |
| | | |
| 23 | | Not used | |
| | | |
| 24 | | Not used | |
| | | |
| 25 | | Not used | |
| | | |
| 26 | E | Terminal 30 | up to 1995_08 Fuse F109 as of 1995_09 Fuse carrier, engine electronics |
| | | |
| 27 | E | DME relay I | DME relay I |
| | | |
| 28 | M | Ground for electronics and sensor shield | Ground connector |
| | | |
| 29 | | Not used | |
| | | |
| 30 | E | Signal, oxygen sensor heater | Heated oxygen sensor 1 in front of catalytic converter |
| | | |
| 31 | A | Fuel injector cyl. 5 | Fuel injector cyl. 5 |
| | | |
| 32 | A | Fuel injector cyl. 6 | Fuel injector cyl. 6 |
| | | |
| 33 | A | Fuel injector cyl. 4 | Fuel injector cyl. 4 |
| | | |
| 34 | M | Ground | Ground point |
| | | |
| 35 | | Not used | |
| | | |
| 36 | A | Signal, A/C compressor relay | Heating and A/C control module |
| | | |
| 37 | | Not used | |
| | | |
| 38 | | Not used | |
| | | |
| 39 | E | Signal, safety fuel cutout | Pedal position sensor |
| | | |
| 40 | E | Knock sensor signal | Knock sensor 2 |
| | | |
| 41 | | Not used | |
| | | |
| 42 | | Not used | |
| | | |
| 43 | | Not used | |
| | | |
| 44 | M | Ground | Ground connector |
| | | |
| 45 | E | Ground, hot-film air mass meter | Hot-film air mass meter |
| | | |
| 46 | M | Oxygen sensor ground | Ground connector |
| | | |
| 47 | | Not used | |
| | | |
| 48 | | Not used | |
| | | |
| 49 | A | Ignition signal Ignition coil 1 | Ignition coil 1 |
| | | |
| 50 | | Not used | |
| | | |
| 51 | | Not used | |
| | | |
| 52 | | Not used | |
| | | |
| 53 | | Not used | |
| | | |
| 54 | E | Terminal 87 | DME relay I |
| | | |
| 55 | M | Ground | Ground point |
| | | |
| 56 | E | Terminal 15 | Fuse F24 |
| | | |
| 57 | | Not used | |
| | | |
| 58 | | Not used | |
| | | |
| 59 | | Not used | |
| | | |
| 60 | E | Programming voltage input | Diagnostic connector Pin 18 |
| | | |
| 61 | A | Tank ventilation valve | Tank ventilation valve I |
| | | |
| 62 | E | Start signal | up to 1994_12 Starter relay as of 1995_01 Electronic immobilizer control unit (EWS) |
| | | |
| 63 | E | Signal, electrical fuel pump | Fuel pump relay 1 |
| | | |
| 64 | | Not used | |
| | | |
| 65 | | Not used | |
| | | |
| 66 | | Not used | |
| | | |
| 67 | | Not used | |
| | | |
| 68 | | Not used | |
| | | |
| 69 | E | Air conditioning system standby signal | Heating and A/C control module |
| | | |
| 70 | E | Knock sensor signal | Knock sensor 1 |
| | | |
| 71 | M | Shield | Ground connector |
| | | |
| 72 | | Not used | |
| | | |
| 73 | | Not used | |
| | | |
| 74 | A | Signal, water temperature regulator | Dual temperature sensor |
| | | |
| 75 | | Not used | |
| | | |
| 76 | | Not used | |
| | | |
| 77 | A | Signal, oxygen sensor | Heated oxygen sensor 1 behind catalytic converter |
| | | |
| 78 | A | Signal, crankshaft sensor | Crankshaft sensor 1 |
| | | |
| 79 | E | Speed signal, rear | ABS/DSC control unit |
| | | |
| 80 | A | Engine speed signal | Integrated electronic control unit (IKE) |
| | | |
| 81 | | Not used | |
| | | |
| 82 | | Not used | |
| | | |
| 83 | A | Injection signal | Integrated electronic control unit (IKE) |
| | | |
| 84 | A | CAN-bus shield | CAN star coupler |
| | | |
| 85 | E/A | CAN-bus low | CAN star coupler |
| | | |
| 86 | E/A | CAN-bus high | CAN star coupler |
| | | |
| 87 | E | Diagnostic link RXD | Diagnostic connector Pin 15 |
| | | |
| 88 | E/A | Diagnostic link TXD | Diagnostic connector Pin 17 |
| | | |