| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Activation of fuel quantity control unit (MSO) | Fuel quantity control unit in injection pump |
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| 2 | A | Activation of fuel quantity control unit (MSO) | Fuel quantity control unit in injection pump |
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| 3 | A | Activation of electrical cut-out (ELAB) | Electrical cut-out valve on distributor-injection pump |
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| 4 | A | Activation, preheating indicator/DDE (LA1) | High: Light module, Basic: Instrument cluster |
| | | |
| 5 | E | Signal, needle movement sensor (NBF1) | Start of injection sensor in injection nozzle (SD nozzle), cylinder 4 |
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| 6 | A | Activation of electropneumatic pressure converter for exhaust gas recirculation (AGR0) | Electropneumatic pressure converter for controlled exhaust gas recirculation |
| | | |
| 7 | | Not used | |
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| 8 | A | Activation of preheater time control (GZS) | Glow plug relay |
| | | |
| 9 | A | Activation of controlled damping engine mount (DSL0) | Electrical changeover valve for engine mount activation |
| | | |
| 10 | A | Activation of solenoid valve for injection timing device (MV0) | Solenoid valve for injection timing device in distributor-injection pump |
| | | |
| 11 | A | Activation of FGR lamp (FGR-L) | FGR lamp in instrument cluster |
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| 12 | M | Ground, needle movement sensor (NBF0) | Ground supply for start of injection sensor in permanent injection nozzle (SD nozzle), cylinder 4 |
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| 13 | M | Sensor ground for shield and sensor (31M) | Ground, or shield for sensor and transmitter |
| | | |
| 14 | E | Control part sensor centre pick-off (RWG-Y) | Centre pick-off of 2 coils of HDK sensor in distributor-injection pump |
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| 15 | A | Activation of DDE main relay (HRL) | DDE main relay |
| | | |
| 16 | E | Supply voltage B + (30ES) | Fuse F1, Fuse carrier, engine electronics |
| | | |
| 17 | E | Supply voltage B + (30ES) | Fuse F1, Fuse carrier, engine electronics |
| | | |
| 18 | M | Ground B- (BAT-) | Ground connector |
| | | |
| 19 | M | Ground B- (BAT-) | Ground connector |
| | | |
| 20 | | Not used | |
| | | |
| 21 | A | Control path sensor reference coil (RWG-R) | Reference coil of HDK sensor in distributor-injection pump |
| | | |
| 22 | | Not used | |
| | | |
| 23 | A | A/C compressor activation from DDE control unit (KOA) | Heating and A/C control module |
| | | |
| 24 | E | A/C compressor request from IHK control unit (S-KO) | Heating and A/C control module |
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| 25 | E | Pedal position sensor idle switch (PWGL) | Idle switch in pedal position sensor |
| | | |
| 26 | E | Brake light switch BRL (BL-ON) | Brake light switch |
| | | |
| 27 | | Not used | |
| | | |
| 28 | E | Clutch switch (KUS, for HG only) | Clutch switch |
| | | |
| 29 | E | Speed signal (DZF-HR) | Connector for rear right wheel speed |
| | | |
| 30 | E | FGR main switch (FGR-MS) | FGR main switch on instrument panel |
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| 31 | E | Brake light test switch BRT (B-EML) | Brake light switch |
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| 32 | E | Vehicle speed control (FGR) | Multifunction steering wheel control unit |
| | | |
| 33 | A | Voltage supply for pedal position sensor (PWG2) | Pedal position sensor potentiometer |
| | | |
| 34 | A | Voltage supply for hot-film air mass meter (LMM2) | Hot-film air mass meter |
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| 35 | E | Fuel temperature sensor (KTF1) | Distributor, Injection pump |
| | | |
| 36 | E | Engine oil temperature sensor (OTF1) | Temperature sensor, engine oil at oil filter |
| | | |
| 37 | E | Signal, pedal position sensor (PWG1) | Pedal position sensor potentiometer |
| | | |
| 38 | E | Signal, hot-film air mass meter (LMM1) | Hot-film air mass meter |
| | | |
| 39 | A | Control path sensor, reference coil (RWG-M) | Measuring coil of HDK sensor in distributor-type injection pump |
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| 40 | E/A | CAN interface CAN-LOW (CAN-L) | CAN-bus |
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| 41 | E | Fault signal, preheater plug relay (DIA) | Glow plug relay |
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| 42 | E/A | Diagnostic interface (DS) | Connector TXD |
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| 43 | E/A | CAN interface CAN-HIGH (CAN-H) | CAN-bus |
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| 44 | E | Air conditioning system switch (S-AC) | Heating and A/C control module |
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| 45 | E | Signal, electronic immobilizer EWS (S-DWA) | Electronic immobilizer control unit (EWS) |
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| 46 | A | Activation of relay for fuel pump (EKP) | Fuel pump relay 1 |
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| 47 | E | Speed (rpm) sensor (DZG1) | Speed (rpm) sensor |
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| 48 | | Not used | |
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| 49 | A | Load signal output (TQ) | Integrated electronic control unit (IKE) |
| | | |
| 50 | A | Engine speed signal output (TD) | Integrated electronic control unit (IKE), Diagnostic connector |
| | | |
| 51 | A | Voltage supply, boost pressure sensor (LDF2) | Boost pressure sensor |
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| 52 | | Not used | |
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| 53 | E | Engine coolant temperature sensor (WTF1) | Dual temperature sensor in cylinder head |
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| 54 | E | Signal, boost pressure sensor (LDF1) | Boost pressure sensor |
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| 55 | E | Control input, ignition lock (K15-E) | Fuse F14 |
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