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BMW M57 ECU (DDE) Pinouts

DDE engine-ECU connector pin assignments for the BMW M57 diesel, for diagnostics, wiring and engine swaps.

1.01: Meaning: Battery voltage (KL.30)
1.02: Meaning: Battery voltage (KL.30)
1.03: Meaning: Diagnostic interface
1.04: Meaning: Battery ground (KL.31); common power-ground reference for nearly all outputs and switch inputs, incl. injector return
1.05: Meaning: Battery ground (KL.31)
1.06: Meaning: Battery ground (KL.31)
1.07: Meaning: Terminal 15 (ignition ON)
1.08: Meaning: Battery voltage (KL.30)
1.09: Meaning: Control unit main relay drive
2.01: Meaning: Viscous fan clutch (PWM output) · Note: reserve/optional
2.02: Meaning: Radiator shutter adjuster · Note: reserve/optional
2.03: Meaning: CAN-bus Low (vehicle)
2.04: Meaning: CAN-bus High (vehicle)
2.05: Meaning: CAN-bus shield
2.06: Meaning: Diagnostic interface
2.07: Meaning: Knock sensor 1 ground
2.08: Meaning: Engine mount activation (DSHL/EUV); coil 31.5 ohm
2.09: Meaning: Fuel low-pressure (pre-supply) sensor supply; 5.0 V +/-0.2 V
2.10: Meaning: Fuel low-pressure sensor ground
2.11: Meaning: Exhaust temp sensor BEFORE CAT ground · Note: reserve/optional
2.12: Meaning: Fault status glow-plug relay 2
2.13: Meaning: EGR adjuster (PWM output) · Note: reserve mirror of 3.10
2.14: Meaning: NOX catalytic converter · Note: reserve/optional
2.15: Meaning: Knock sensor 1 signal
2.16: Meaning: Digital input · Note: jumper to 4.19
2.17: Meaning: Fuel low-pressure sensor signal
2.18: Meaning: Exhaust temp sensor BEFORE CAT signal · Note: reserve/optional
2.19: Meaning: Particle filter regeneration · Note: reserve/optional
2.20: Meaning: Boost pressure (VNT/LDS) adjuster; 15.4 ohm, ~300 Hz · Note: jumper to 3.23
2.21: Meaning: Auxiliary heating
2.22: Meaning: Exhaust temp sensor AFTER CAT ground · Note: reserve/optional
2.23: Meaning: Particle filter regeneration · Note: reserve/optional
2.24: Meaning: Exhaust temp sensor AFTER CAT signal · Note: reserve/optional
3.01: Meaning: Mass air flow (HFM) sensor supply; 8-17 V batt supply
3.02: Meaning: Mass air flow sensor signal
3.03: Meaning: Mass air flow sensor ground
3.04: Meaning: Camshaft phase sensor signal; digital square-wave
3.05: Meaning: Knock sensor 2 signal
3.06: Meaning: Crankshaft position/rpm sensor signal; 1270 ohm +/-10%, 860 mH +/-15%
3.07: Meaning: Crankshaft position/rpm - digital input
3.08: Meaning: Alternator cutout
3.09: Meaning: Auxiliary heating
3.10: Meaning: EGR adjuster (PWM output); 15.4 ohm, ~300 Hz · Note: also 4.18
3.11: Meaning: Fuel temperature sensor signal · Note: reserve/optional
3.12: Meaning: Glow-plug relay activation
3.13: Meaning: Exhaust air-flap / boost control
3.14: Meaning: Boost pressure sensor supply; 5.0 V +/-0.25 V
3.15: Meaning: Boost pressure sensor signal
3.16: Meaning: Boost pressure sensor ground
3.17: Meaning: Camshaft phase sensor ground
3.18: Meaning: Fuel temperature sensor ground · Note: reserve/optional
3.19: Meaning: Crankshaft sensor reference/shield (DZG)
3.20: Meaning: Rail pressure sensor ground
3.21: Meaning: Position feedback VNT signal · Note: reserve/optional
3.22: Meaning: Position feedback VNT ground · Note: reserve/optional
3.23: Meaning: Boost pressure (VNT/LDS) adjuster · Note: jumper to 2.20
3.24: Meaning: Engine - valve cutout 1/2 · Note: reserve/optional
3.25: Meaning: Characteristic-map thermostat · Note: jumper to 4.03
3.26: Meaning: Intake air temp sensor ground
3.27: Meaning: Oil temperature sensor signal · Note: reserve/optional
3.28: Meaning: Coolant temperature sensor signal; NTC 2.252 kohm +/-7.1%
3.29: Meaning: Intake air temperature sensor signal (in HFM5)
3.30: Meaning: Position feedback VNT signal · Note: reserve/optional
3.31: Meaning: Crankshaft position/rpm sensor B (ground)
3.32: Meaning: Coolant temperature sensor ground
3.33: Meaning: Rail pressure sensor signal
3.34: Meaning: Oil temperature sensor ground · Note: reserve/optional
3.35: Meaning: Rail pressure sensor supply · Note: CONFLICT: signal-description page p.130 cites supply pin 2.35 (U_KDF), but socket 2 has no pin 2.35 (24-pin block). Annex p.194 places supply at 3.35 (U_RDS). Ground (3.20) and signal (3.33) agree across both; only supply pin differs. Best interpretation: rail-pressure supply = 3.35, '2.35' is a typo. VERIFY on wiring diagram / physical connector before relying.
3.36: Meaning: Position feedback VNT supply · Note: reserve/optional
3.37: Meaning: -
3.38: Meaning: Rail pressure control valve; ground 1.04
3.39: Meaning: Element cutout CP3b · Note: reserve/optional
3.40: Meaning: Oil level sensor · Note: jumper to 4.21
3.41: Meaning: Oil pressure sensor · Note: jumper to 4.11
3.42: Meaning: Not used on the M57 (single-controller); DDE 4.1 incremental output (not used on the M57) · Note: Not used on the M57
3.43: Meaning: Knock sensor 2 ground
3.44: Meaning: CAN-bus Low (DDE 4.1 inter-ECU) · Note: Not used on the M57
3.45: Meaning: CAN-bus High (DDE 4.1 inter-ECU) · Note: Not used on the M57
3.46: Meaning: CAN-bus High (vehicle) · Note: CONFLICT: Annex prints code D_CAN-H but word description says 'CAN-bus Low' - contradicts. By naming key (H=High) the code is authoritative: 3.46 = CAN-High. Verify against wiring diagram before splicing.
3.47: Meaning: CAN-bus Low (vehicle) · Note: CONFLICT: Annex prints code D_CAN-L but word description says 'CAN-bus High' - contradicts. By naming key (L=Low) the code is authoritative: 3.47 = CAN-Low. Verify against wiring diagram before splicing.
3.48: Meaning: CAN-bus shield
3.49: Meaning: Analog reference ground
3.50: Meaning: Charge control D+ · Note: jumper to 4.01
3.51: Meaning: Engine start signal feedback · Note: jumper to 4.02
3.52: Meaning: Fault status glow-plug relay 1
4.01: Meaning: Charge control D+ · Note: jumper to 3.50
4.02: Meaning: Engine start signal feedback · Note: jumper to 3.51
4.03: Meaning: Characteristic-map thermostat · Note: jumper to 3.25
4.04: Meaning: Fan control
4.05: Meaning: -
4.06: Meaning: -
4.07: Meaning: Pedal position sensor 1 ground
4.08: Meaning: Pedal position sensor 1 signal; 1 kohm, 0-78 deg
4.09: Meaning: Pedal position sensor 1 supply
4.10: Meaning: Fuel pre-supply pump (EKP) drive
4.11: Meaning: Oil pressure sensor · Note: jumper to 3.41
4.12: Meaning: Pedal position sensor 2 ground
4.13: Meaning: Pedal position sensor 2 signal
4.14: Meaning: Pedal position sensor 2 supply
4.15: Meaning: Multifunction steering wheel ground
4.16: Meaning: Idle switch signal
4.17: Meaning: TD (rev) signal output; sync w/ crank
4.18: Meaning: EGR adjuster · Note: jumper to 3.10
4.19: Meaning: Output · Note: jumper to 2.16
4.20: Meaning: Alternator cutout · Note: jumper to 3.08
4.21: Meaning: Oil level sensor · Note: jumper to 3.40
4.22: Meaning: Vehicle speed / cruise control signal; 48 pulses/rev from ABS/ASC
4.23: Meaning: Clutch switch (to ground)
4.24: Meaning: Brake light switch (to ground)
4.25: Meaning: Digital input · Note: reserve/optional
4.26: Meaning: Terminal 15 (ignition ON)
4.27: Meaning: Cruise control / MFL steering wheel
4.28: Meaning: Brake light test switch (to UB)
4.29: Meaning: A/C compressor relay
4.30: Meaning: A/C compressor relay
4.31: Meaning: Digital input (aux heater D_ZHA) · Note: reserve/optional
4.32: Meaning: Diagnostic interface
4.33: Meaning: Electronic vehicle immobilisation (EWS); must be satisfied to start
4.34: Meaning: Digital input · Note: reserve/optional
4.35: Meaning: CAN-bus shield
4.36: Meaning: CAN-bus High (ABS/ASC)
4.37: Meaning: CAN-bus Low (ABS/ASC)
4.38: Meaning: Fan control
4.39: Meaning: Digital input · Note: reserve/optional
4.40: Meaning: Automatic start relay
5.01: Meaning: Injector High side - bank 2 (cyl 4-6 supply)
5.02: Meaning: Injector High side - bank 1; jumper to 5.04
5.03: Meaning: Injector low side - bank 2 cyl 6
5.04: Meaning: Injector High side - bank 1 (cyl 1-3 supply)
5.05: Meaning: Injector low side - bank 1 cyl 1
5.06: Meaning: Injector low side - bank 2 cyl 4
5.07: Meaning: Injector low side - bank 1 cyl 3
5.08: Meaning: Injector low side - bank 1 cyl 2
5.09: Meaning: Injector low side - bank 2 cyl 5
Engine connector: Colour: black · Description: Engine/injector harness
Body connector: Colour: black · Description: Body/vehicle harness ([E]/[F]; [B] merges all into one 96-pin 1-nn scheme - attribution unverified)
X2411.1: Meaning: Injector cyl 4 supply
X2411.2: Meaning: Injector cyl 6 supply
X2411.3: Meaning: Injector cyl 5 supply
X2411.6: Meaning: Charge-air temp sensor ground
X2411.7: Meaning: Coolant/dual-temp sensor ground
X2411.10: Meaning: Oil-pressure switch signal
X2411.11: Meaning: Fuel-temp sensor ground
X2411.14: Meaning: Camshaft Hall sensor ground · Note: [E] lists 14 = cam-sensor ground; [B] crank/cam grouping ambiguous. Treat 14=cam gnd, 15=crank gnd, but verify.
X2411.15: Meaning: Crankshaft sensor ground
X2411.18: Meaning: Terminal 15 switch input · Note: CONFLICT: [B] only. Places KL15 on ENGINE connector 1-18. [E]+[F] place KL15 on BODY pin 7. May be two different signals (switched T15 input vs main wake-up). Do NOT wire KL15 from one source alone - ring out the specific ECU.
X2411.22: Meaning: Diagnosis jumper (auto trans)
X2411.24: Meaning: Engine-mount changeover valve
X2411.25: Meaning: Injector cyl 4 ground
X2411.26: Meaning: Injector cyl 6 ground
X2411.27: Meaning: Injector cyl 5 ground
X2411.30: Meaning: Rail-pressure sensor supply
X2411.32: Meaning: Boost-pressure sensor supply
X2411.37: Meaning: Alternator BSD interface
X2411.39: Meaning: Crankshaft sensor supply
X2411.44: Meaning: DDE main relay drive · Note: [B] labels 'ground' - verify polarity.
X2411.45: Meaning: HFM6 MAF signal · Note: [E] gave range 45-47
X2411.46: Meaning: HFM supply/ground block
X2411.47: Meaning: HFM - 3rd MAF signal (DDE5) · Note: DIFFERS from DDE6 where pin 47 = ground
X2411.49: Meaning: Injector cyl 1 supply