BMW 3 Series E46 M3 2001–2006 (S54) → FuelTech FT450 (auto)
BMW 3 Series E46 M3 2001–2006 (S54) — FuelTech — FT450
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-11
Before you start
Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
| Status | draft · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | 7: read the Findings page before cutting any wire |
| Size of the job | 47 wires · 10 connectors · 1 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Order of work | 1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up. |
Build checklist
Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.
| Wire | From | To | Gauge | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-X60001-2 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-X60001-8 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-X60003-4 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-X60003-5 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | SP-14V-1 | FT450-A-A13 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-X60001-4 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-X60001-5 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-X60001-6 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-X60001-9 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-X60005-5 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | FT450-A-A7 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-X60003-15 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-X60003-35 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-X60003-36 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-X60003-37 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-X60003-45 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-X60003-49 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-X60004-12 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-X60004-7 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | SP-0V-1 | FT450-A-A12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-X60004-14 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-X60004-9 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | SP-5V1-1 | FT450-A-A14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-X60003-3 | FT450-A-A18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | SP-0V-1 | FT450-A-A18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-X60003-30 | FT450-A-A17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-X60005-6 | FT450-A-A8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-X60005-7 | FT450-A-A9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-X60005-4 | FT450-A-A10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-X60005-8 | FT450-A-A11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-X60003-13 | FT450-A-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-X60003-6 | FT450-A-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-X60003-26 | FT450-A-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-X60003-7 | FT450-A-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-X60003-11 | FT450-A-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-X60003-8 | FT450-A-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-X60001-1 | FT450-A-A6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-X60002-23 | FT450-A-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-X60004-10 | FT450-A-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-X60002-1 | FT450-A-A5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-X60003-1 | FT450-A-A20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-X60003-32 | FT450-A-A21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-X60004-8 | FT450-A-A22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-X60003-31 | FT450-A-A23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-X60004-13 | FT450-A-A25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-X60003-28 | FT450-A-A24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-X60003-27 | FT450-A-A26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ |
Bench test (before first power-up)
Battery disconnected, ECU and every sensor unplugged. Meter on resistance. Each pair below must read open (OL): a reading means a pinched wire, a stray strand or a mis-pinned cavity. Then check continuity of every wire (last column of the build checklist).
| # | Probe A | Probe B | Expect | Why | Reading |
|---|---|---|---|---|---|
| 1 | FT450-A-A13 | FT450-A-A12 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | FT450-A-A13 | FT450-A-A7 | open (OL) | +12 V supply must not touch power ground | |
| 3 | FT450-A-A12 | FT450-A-A14 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 4 | FT450-A-A13 | FT450-A-A14 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 5 | FT450-A-A7 | FT450-A-A14 | open (OL) | power ground must not touch 5 V sensor reference |
If any reading doesn't match, stop and get help before powering up.
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
FT450-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | Injector 1 (Bank A) | — | W31 | — | 0.5 | OEM-X60003-13 | — | — | — |
| A1 | Injector 1 (Bank A) | — | W33 | — | 0.5 | OEM-X60003-26 | — | — | — |
| A1 | Injector 1 (Bank A) | — | W35 | — | 0.5 | OEM-X60003-11 | — | — | — |
| A10 | Ignition 3 | — | W29 | — | 0.5 | OEM-X60005-4 | — | — | — |
| A11 | Ignition 4 | — | W30 | — | 0.5 | OEM-X60005-8 | — | — | — |
| A12 | Signal ground | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
| A13 | +12V switched | — | W5 | — | 0.85 | SP-14V-1 | — | — | — |
| A14 | +5V sensor supply | — | W23 | — | 0.5 | SP-5V1-1 | — | — | — |
| A15 | CAN A LOW | — | — | — | — | — | — | — | — |
| A16 | CAN A HIGH | — | — | — | — | — | — | — | — |
| A17 | Phase input (cam) | — | W26 | — | 0.5 | OEM-X60003-30 | — | — | — |
| A18 | RPM reference (crank -) | — | W24 | — | 0.5 | OEM-X60003-3 | — | — | — |
| A18 | RPM reference (crank -) | — | W25 | — | 0.5 | SP-0V-1 | — | — | — |
| A19 | RPM signal (crank +) | — | — | — | — | — | — | — | — |
| A2 | Injector 2 (Bank A) | — | W32 | — | 0.5 | OEM-X60003-6 | — | — | — |
| A2 | Injector 2 (Bank A) | — | W34 | — | 0.5 | OEM-X60003-7 | — | — | — |
| A2 | Injector 2 (Bank A) | — | W36 | — | 0.5 | OEM-X60003-8 | — | — | — |
| A20 | White input 1 | — | W41 | — | 0.5 | OEM-X60003-1 | — | — | — |
| A21 | White input 2 | — | W42 | — | 0.5 | OEM-X60003-32 | — | — | — |
| A22 | White input 3 (TPS) | — | W43 | — | 0.5 | OEM-X60004-8 | — | — | — |
| A23 | White input 4 (oil pressure) | — | W44 | — | 0.5 | OEM-X60003-31 | — | — | — |
| A24 | White input 5 (water temp) | — | W46 | — | 0.5 | OEM-X60003-28 | — | — | — |
| A25 | White input 6 (fuel pressure) | — | W45 | — | 0.5 | OEM-X60004-13 | — | — | — |
| A26 | White input 7 (air temp) | — | W47 | — | 0.5 | OEM-X60003-27 | — | — | — |
| A3 | Aux 1 | — | W38 | — | 0.5 | OEM-X60002-23 | — | — | — |
| A4 | Aux 2 | — | W39 | — | 0.5 | OEM-X60004-10 | — | — | — |
| A5 | Aux 3 | — | W40 | — | 0.5 | OEM-X60002-1 | — | — | — |
| A6 | Aux 4 (fuel pump / relays) | — | W37 | — | 0.5 | OEM-X60001-1 | — | — | — |
| A7 | Power ground | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| A8 | Ignition 1 | — | W27 | — | 0.5 | OEM-X60005-6 | — | — | — |
| A9 | Ignition 2 | — | W28 | — | 0.5 | OEM-X60005-7 | — | — | — |
OEM-X60001
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector relay control | — | W37 | — | 0.5 | FT450-A-A6 | — | — | — |
| 2 | DBW output-stage supply (P_DKSM+) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 5 | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 6 | Power ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 7 | Battery constant (terminal 30) | — | — | — | — | — | — | — | — |
| 8 | ECU main power (terminal 87 via main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 9 | DBW output-stage return (P_DKSM-) | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
OEM-X60002
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | O2 sensor heater, front 1 (pre-cat) | — | W40 | — | 0.5 | FT450-A-A5 | — | — | — |
| 12 | O2 sensor heater, rear 2 (post-cat) | — | — | — | — | — | — | — | — |
| 14 | O2 sensor signal, rear 2 (post-cat) | — | — | — | — | — | — | — | — |
| 16 | O2 sensor signal, rear 1 (post-cat) | — | — | — | — | — | — | — | — |
| 2 | O2 sensor heater, front 2 (pre-cat) | — | — | — | — | — | — | — | — |
| 23 | Main relay control | — | W38 | — | 0.5 | FT450-A-A3 | — | — | — |
| 6 | O2 sensor heater, rear 1 (post-cat) | — | — | — | — | — | — | — | — |
OEM-X60003
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Mass air flow (MAF) signal | — | W41 | — | 0.5 | FT450-A-A20 | — | — | — |
| 10 | VANOS intake solenoid | — | — | — | — | — | — | — | — |
| 11 | Injector cylinder 5 | — | W35 | — | 0.5 | FT450-A-A1 | — | — | — |
| 12 | Map-controlled thermostat | — | — | — | — | — | — | — | — |
| 13 | Injector cylinder 1 | — | W31 | — | 0.5 | FT450-A-A1 | — | — | — |
| 15 | Throttle ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Oil pressure switch | — | — | — | — | — | — | — | — |
| 21 | Evap purge valve | — | — | — | — | — | — | — | — |
| 22 | Idle speed control, close | — | — | — | — | — | — | — | — |
| 23 | Idle speed control, open | — | — | — | — | — | — | — | — |
| 26 | Injector cylinder 3 | — | W33 | — | 0.5 | FT450-A-A1 | — | — | — |
| 27 | Intake air temperature (IAT) | — | W47 | — | 0.5 | FT450-A-A26 | — | — | — |
| 28 | Engine coolant temperature (ECT) | — | W46 | — | 0.5 | FT450-A-A24 | — | — | — |
| 29 | Intake camshaft position | — | — | — | — | — | — | — | — |
| 3 | Crankshaft position | — | W24 | — | 0.5 | FT450-A-A18 | — | — | — |
| 30 | Exhaust camshaft position | — | W26 | — | 0.5 | FT450-A-A17 | — | — | — |
| 31 | Throttle position sensor 2 | — | W44 | — | 0.5 | FT450-A-A23 | — | — | — |
| 32 | Throttle position sensor 1 | — | W42 | — | 0.5 | FT450-A-A21 | — | — | — |
| 33 | Knock sensor 1 | — | — | — | — | — | — | — | — |
| 34 | Knock sensor 2 | — | — | — | — | — | — | — | — |
| 35 | ECT ground | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 36 | Intake camshaft ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 37 | Crankshaft ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 4 | MAF supply | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 42 | Throttle motor drive 1 (H-bridge) | — | — | — | — | — | — | — | — |
| 43 | Throttle motor drive 2 (H-bridge) | — | — | — | — | — | — | — | — |
| 44 | Engine oil temperature | — | — | — | — | — | — | — | — |
| 45 | Oil temperature ground | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 46 | Knock sensor 3 | — | — | — | — | — | — | — | — |
| 47 | Knock sensor 4 | — | — | — | — | — | — | — | — |
| 49 | Exhaust camshaft ground | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | Throttle (EDK/ITB) supply | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 50 | Oil level switch | — | — | — | — | — | — | — | — |
| 6 | Injector cylinder 2 | — | W32 | — | 0.5 | FT450-A-A2 | — | — | — |
| 7 | Injector cylinder 4 | — | W34 | — | 0.5 | FT450-A-A2 | — | — | — |
| 8 | Injector cylinder 6 | — | W36 | — | 0.5 | FT450-A-A2 | — | — | — |
| 9 | VANOS exhaust solenoid | — | — | — | — | — | — | — | — |
OEM-X60004
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | Fuel pump relay control | — | W39 | — | 0.5 | FT450-A-A4 | — | — | — |
| 12 | Pedal ground 2 | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 13 | Pedal position signal 2 | — | W45 | — | 0.5 | FT450-A-A25 | — | — | — |
| 14 | Pedal +5V supply 2 | — | W21 | — | 0.5 | SP-5V1-1 | — | — | — |
| 7 | Pedal ground 1 | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Pedal position signal 1 | — | W43 | — | 0.5 | FT450-A-A22 | — | — | — |
| 9 | Pedal +5V supply 1 | — | W22 | — | 0.5 | SP-5V1-1 | — | — | — |
OEM-X60005
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ignition coil 5 | — | — | — | — | — | — | — | — |
| 4 | Ignition coil 3 | — | W29 | — | 0.5 | FT450-A-A10 | — | — | — |
| 5 | Ignition ground | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 6 | Ignition coil 1 | — | W27 | — | 0.5 | FT450-A-A8 | — | — | — |
| 7 | Ignition coil 2 | — | W28 | — | 0.5 | FT450-A-A9 | — | — | — |
| 8 | Ignition coil 4 | — | W30 | — | 0.5 | FT450-A-A11 | — | — | — |
| 9 | Ignition coil 6 | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W12 | — | 0.5 | OEM-X60003-15 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-X60003-35 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-X60003-36 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-X60003-37 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-X60003-45 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | OEM-X60003-49 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | OEM-X60004-12 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | OEM-X60004-7 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | FT450-A-A12 | — | — | — |
| 1 | — | — | W25 | — | 0.5 | FT450-A-A18 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-X60001-2 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-X60001-8 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | OEM-X60003-4 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | OEM-X60003-5 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | FT450-A-A13 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W21 | — | 0.5 | OEM-X60004-14 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | OEM-X60004-9 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | FT450-A-A14 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W6 | — | 0.85 | OEM-X60001-4 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-X60001-5 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-X60001-6 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | OEM-X60001-9 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | OEM-X60005-5 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | FT450-A-A7 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-X60001-1 | Injector relay control | low_side_out | FT450-A-A6 | Aux 4 (fuel pump / relays) | low_side_out | corroborated | |
| OEM-X60001-2 | DBW output-stage supply (P_DKSM+) | power_in | FT450-A-A13 | +12V switched | power_in | single_source | |
| OEM-X60001-4 | Power ground | ground | FT450-A-A7 | Power ground | ground | corroborated | |
| OEM-X60001-5 | Power ground | ground | FT450-A-A7 | Power ground | ground | corroborated | |
| OEM-X60001-6 | Power ground | ground | FT450-A-A7 | Power ground | ground | corroborated | |
| OEM-X60001-7 | Battery constant (terminal 30) | power_in | — | — | — | corroborated | |
| OEM-X60001-8 | ECU main power (terminal 87 via main relay) | power_in | FT450-A-A13 | +12V switched | power_in | corroborated | |
| OEM-X60001-9 | DBW output-stage return (P_DKSM-) | ground | FT450-A-A7 | Power ground | ground | single_source | |
| OEM-X60002-1 | O2 sensor heater, front 1 (pre-cat) | low_side_out | FT450-A-A5 | Aux 3 | low_side_out | corroborated | |
| OEM-X60002-12 | O2 sensor heater, rear 2 (post-cat) | low_side_out | — | — | — | corroborated | |
| OEM-X60002-14 | O2 sensor signal, rear 2 (post-cat) | lambda_nb_in | — | — | — | corroborated | |
| OEM-X60002-16 | O2 sensor signal, rear 1 (post-cat) | lambda_nb_in | — | — | — | corroborated | |
| OEM-X60002-2 | O2 sensor heater, front 2 (pre-cat) | low_side_out | — | — | — | corroborated | |
| OEM-X60002-23 | Main relay control | low_side_out | FT450-A-A3 | Aux 1 | low_side_out | corroborated | |
| OEM-X60002-6 | O2 sensor heater, rear 1 (post-cat) | low_side_out | — | — | — | corroborated | |
| OEM-X60003-1 | Mass air flow (MAF) signal | analog_in | FT450-A-A20 | White input 1 | analog_in | corroborated | |
| OEM-X60003-10 | VANOS intake solenoid | low_side_out | — | — | — | corroborated | |
| OEM-X60003-11 | Injector cylinder 5 | injector_out | FT450-A-A1 | Injector 1 (Bank A) | injector_out | corroborated | |
| OEM-X60003-12 | Map-controlled thermostat | low_side_out | — | — | — | corroborated | |
| OEM-X60003-13 | Injector cylinder 1 | injector_out | FT450-A-A1 | Injector 1 (Bank A) | injector_out | corroborated | |
| OEM-X60003-15 | Throttle ground | sensor_ground | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | corroborated | |
| OEM-X60003-16 | Oil pressure switch | digital_in | — | — | — | corroborated | |
| OEM-X60003-21 | Evap purge valve | low_side_out | — | — | — | corroborated | |
| OEM-X60003-22 | Idle speed control, close | hbridge_out | — | — | — | corroborated | |
| OEM-X60003-23 | Idle speed control, open | hbridge_out | — | — | — | corroborated | |
| OEM-X60003-26 | Injector cylinder 3 | injector_out | FT450-A-A1 | Injector 1 (Bank A) | injector_out | corroborated | |
| OEM-X60003-27 | Intake air temperature (IAT) | temp_in | FT450-A-A26 | White input 7 (air temp) | temp_in | corroborated | |
| OEM-X60003-28 | Engine coolant temperature (ECT) | temp_in | FT450-A-A24 | White input 5 (water temp) | temp_in | corroborated | |
| OEM-X60003-29 | Intake camshaft position | trigger_in | — | — | — | corroborated | |
| OEM-X60003-3 | Crankshaft position | trigger_in | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | corroborated | |
| OEM-X60003-30 | Exhaust camshaft position | trigger_in | FT450-A-A17 | Phase input (cam) | trigger_in | corroborated | |
| OEM-X60003-31 | Throttle position sensor 2 | analog_in | FT450-A-A23 | White input 4 (oil pressure) | analog_in | corroborated | |
| OEM-X60003-32 | Throttle position sensor 1 | analog_in | FT450-A-A21 | White input 2 | analog_in | corroborated | |
| OEM-X60003-33 | Knock sensor 1 | knock_in | — | — | — | corroborated | |
| OEM-X60003-34 | Knock sensor 2 | knock_in | — | — | — | corroborated | |
| OEM-X60003-35 | ECT ground | sensor_ground | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | corroborated | |
| OEM-X60003-36 | Intake camshaft ground | sensor_ground | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | corroborated | |
| OEM-X60003-37 | Crankshaft ground | sensor_ground | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | corroborated | |
| OEM-X60003-4 | MAF supply | power_in | FT450-A-A13 | +12V switched | power_in | corroborated | |
| OEM-X60003-42 | Throttle motor drive 1 (H-bridge) | hbridge_out | — | — | — | corroborated | |
| OEM-X60003-43 | Throttle motor drive 2 (H-bridge) | hbridge_out | — | — | — | corroborated | |
| OEM-X60003-44 | Engine oil temperature | temp_in | — | — | — | corroborated | |
| OEM-X60003-45 | Oil temperature ground | sensor_ground | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | corroborated | |
| OEM-X60003-46 | Knock sensor 3 | knock_in | — | — | — | corroborated | |
| OEM-X60003-47 | Knock sensor 4 | knock_in | — | — | — | corroborated | |
| OEM-X60003-49 | Exhaust camshaft ground | sensor_ground | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | corroborated | |
| OEM-X60003-5 | Throttle (EDK/ITB) supply | power_in | FT450-A-A13 | +12V switched | power_in | corroborated | |
| OEM-X60003-50 | Oil level switch | digital_in | — | — | — | corroborated | |
| OEM-X60003-6 | Injector cylinder 2 | injector_out | FT450-A-A2 | Injector 2 (Bank A) | injector_out | corroborated | |
| OEM-X60003-7 | Injector cylinder 4 | injector_out | FT450-A-A2 | Injector 2 (Bank A) | injector_out | corroborated | |
| OEM-X60003-8 | Injector cylinder 6 | injector_out | FT450-A-A2 | Injector 2 (Bank A) | injector_out | corroborated | |
| OEM-X60003-9 | VANOS exhaust solenoid | low_side_out | — | — | — | corroborated | |
| OEM-X60004-10 | Fuel pump relay control | low_side_out | FT450-A-A4 | Aux 2 | low_side_out | corroborated | |
| OEM-X60004-12 | Pedal ground 2 | sensor_ground | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | corroborated | |
| OEM-X60004-13 | Pedal position signal 2 | analog_in | FT450-A-A25 | White input 6 (fuel pressure) | analog_in | corroborated | |
| OEM-X60004-14 | Pedal +5V supply 2 | vref | FT450-A-A14 | +5V sensor supply | vref | corroborated | |
| OEM-X60004-7 | Pedal ground 1 | sensor_ground | FT450-A-A12 + FT450-A-A18 | Signal ground + RPM reference (crank -) | sensor_ground + trigger_in | corroborated | |
| OEM-X60004-8 | Pedal position signal 1 | analog_in | FT450-A-A22 | White input 3 (TPS) | analog_in | corroborated | |
| OEM-X60004-9 | Pedal +5V supply 1 | vref | FT450-A-A14 | +5V sensor supply | vref | corroborated | |
| OEM-X60005-1 | Ignition coil 5 | ignition_out | — | — | — | corroborated | |
| OEM-X60005-4 | Ignition coil 3 | ignition_out | FT450-A-A10 | Ignition 3 | ignition_out | corroborated | |
| OEM-X60005-5 | Ignition ground | ground | FT450-A-A7 | Power ground | ground | corroborated | |
| OEM-X60005-6 | Ignition coil 1 | ignition_out | FT450-A-A8 | Ignition 1 | ignition_out | corroborated | |
| OEM-X60005-7 | Ignition coil 2 | ignition_out | FT450-A-A9 | Ignition 2 | ignition_out | corroborated | |
| OEM-X60005-8 | Ignition coil 4 | ignition_out | FT450-A-A11 | Ignition 4 | ignition_out | corroborated | |
| OEM-X60005-9 | Ignition coil 6 | ignition_out | — | — | — | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-X60001-2 | SP-14V-1 | 0.85 | no route | DBW output-stage supply (P_DKSM+) | — | |
| W2 | OEM-X60001-8 | SP-14V-1 | 0.85 | no route | ECU main power (terminal 87 via main relay) | — | |
| W3 | OEM-X60003-4 | SP-14V-1 | 0.85 | no route | MAF supply | — | |
| W4 | OEM-X60003-5 | SP-14V-1 | 0.85 | no route | Throttle (EDK/ITB) supply | — | |
| W5 | SP-14V-1 | FT450-A-A13 | 0.85 | no route | +12V switched | — | |
| W6 | OEM-X60001-4 | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | OEM-X60001-5 | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W8 | OEM-X60001-6 | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W9 | OEM-X60001-9 | SP-GND-1 | 0.85 | no route | DBW output-stage return (P_DKSM-) | — | |
| W10 | OEM-X60005-5 | SP-GND-1 | 0.85 | no route | Ignition ground | — | |
| W11 | SP-GND-1 | FT450-A-A7 | 0.85 | no route | Power ground | — | |
| W12 | OEM-X60003-15 | SP-0V-1 | 0.5 | no route | Throttle ground | — | |
| W13 | OEM-X60003-35 | SP-0V-1 | 0.5 | no route | ECT ground | — | |
| W14 | OEM-X60003-36 | SP-0V-1 | 0.5 | no route | Intake camshaft ground | — | |
| W15 | OEM-X60003-37 | SP-0V-1 | 0.5 | no route | Crankshaft ground | — | |
| W16 | OEM-X60003-45 | SP-0V-1 | 0.5 | no route | Oil temperature ground | — | |
| W17 | OEM-X60003-49 | SP-0V-1 | 0.5 | no route | Exhaust camshaft ground | — | |
| W18 | OEM-X60004-12 | SP-0V-1 | 0.5 | no route | Pedal ground 2 | — | |
| W19 | OEM-X60004-7 | SP-0V-1 | 0.5 | no route | Pedal ground 1 | — | |
| W20 | SP-0V-1 | FT450-A-A12 | 0.5 | no route | Signal ground | — | |
| W21 | OEM-X60004-14 | SP-5V1-1 | 0.5 | no route | Pedal +5V supply 2 | — | |
| W22 | OEM-X60004-9 | SP-5V1-1 | 0.5 | no route | Pedal +5V supply 1 | — | |
| W23 | SP-5V1-1 | FT450-A-A14 | 0.5 | no route | +5V sensor supply | — | |
| W24 | OEM-X60003-3 | FT450-A-A18 | 0.5 | no route | Crankshaft position | — | |
| W25 | SP-0V-1 | FT450-A-A18 | 0.5 | no route | RPM reference (crank -) | — | |
| W26 | OEM-X60003-30 | FT450-A-A17 | 0.5 | no route | Exhaust camshaft position | — | |
| W27 | OEM-X60005-6 | FT450-A-A8 | 0.5 | no route | Ignition coil 1 | — | |
| W28 | OEM-X60005-7 | FT450-A-A9 | 0.5 | no route | Ignition coil 2 | — | |
| W29 | OEM-X60005-4 | FT450-A-A10 | 0.5 | no route | Ignition coil 3 | — | |
| W30 | OEM-X60005-8 | FT450-A-A11 | 0.5 | no route | Ignition coil 4 | — | |
| W31 | OEM-X60003-13 | FT450-A-A1 | 0.5 | no route | Injector cylinder 1 | — | |
| W32 | OEM-X60003-6 | FT450-A-A2 | 0.5 | no route | Injector cylinder 2 | — | |
| W33 | OEM-X60003-26 | FT450-A-A1 | 0.5 | no route | Injector cylinder 3 | — | |
| W34 | OEM-X60003-7 | FT450-A-A2 | 0.5 | no route | Injector cylinder 4 | — | |
| W35 | OEM-X60003-11 | FT450-A-A1 | 0.5 | no route | Injector cylinder 5 | — | |
| W36 | OEM-X60003-8 | FT450-A-A2 | 0.5 | no route | Injector cylinder 6 | — | |
| W37 | OEM-X60001-1 | FT450-A-A6 | 0.5 | no route | Injector relay control | — | |
| W38 | OEM-X60002-23 | FT450-A-A3 | 0.5 | no route | Main relay control | — | |
| W39 | OEM-X60004-10 | FT450-A-A4 | 0.5 | no route | Fuel pump relay control | — | |
| W40 | OEM-X60002-1 | FT450-A-A5 | 0.5 | no route | O2 sensor heater, front 1 (pre-cat) | — | |
| W41 | OEM-X60003-1 | FT450-A-A20 | 0.5 | no route | Mass air flow (MAF) signal | — | |
| W42 | OEM-X60003-32 | FT450-A-A21 | 0.5 | no route | Throttle position sensor 1 | — | |
| W43 | OEM-X60004-8 | FT450-A-A22 | 0.5 | no route | Pedal position signal 1 | — | |
| W44 | OEM-X60003-31 | FT450-A-A23 | 0.5 | no route | Throttle position sensor 2 | — | |
| W45 | OEM-X60004-13 | FT450-A-A25 | 0.5 | no route | Pedal position signal 2 | — | |
| W46 | OEM-X60003-28 | FT450-A-A24 | 0.5 | no route | Engine coolant temperature (ECT) | — | |
| W47 | OEM-X60003-27 | FT450-A-A26 | 0.5 | no route | Intake air temperature (IAT) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | BMW-E46-MSS54-CONN | BMW | E46 DME (MSS54) harness connector | 1.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (9)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | NET_MERGED | FT450-A-A1 + OEM-X60003-11 + OEM-X60003-13 + OEM-X60003-26 | 3 different OEM functions share one net: OEM-X60003-11 Injector cylinder 5; OEM-X60003-13 Injector cylinder 1; OEM-X60003-26 Injector cylinder 3 |
| error | NET_MERGED | FT450-A-A2 + OEM-X60003-6 + OEM-X60003-7 + OEM-X60003-8 | 3 different OEM functions share one net: OEM-X60003-6 Injector cylinder 2; OEM-X60003-7 Injector cylinder 4; OEM-X60003-8 Injector cylinder 6 |
| error | REQUIRED_UNMAPPED | OEM-X60003-29 | Required OEM function "Intake camshaft position" (trigger_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X60003-42 | Required OEM function "Throttle motor drive 1 (H-bridge)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X60003-43 | Required OEM function "Throttle motor drive 2 (H-bridge)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X60005-1 | Required OEM function "Ignition coil 5" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X60005-9 | Required OEM function "Ignition coil 6" (ignition_out) is not connected to the new ECU. |
| info | NET_FAMILY | OEM-X60004-7 ↔ FT450-A-A18 | OEM-X60004-7 "Pedal ground 1" [sensor_ground] is wired to FT450-A-A18 "RPM reference (crank -)" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | UNMAPPED | OEM | 18 optional OEM pins are not mapped: OEM-X60002-12 O2 sensor heater, rear 2 (post-cat); OEM-X60002-14 O2 sensor signal, rear 2 (post-cat); OEM-X60002-16 O2 sensor signal, rear 1 (post-cat); OEM-X60002-2 O2 sensor heater, front 2 (pre-cat); OEM-X60002-6 O2 sensor heater, rear 1 (post-cat); OEM-X60003-10 VANOS intake solenoid; OEM-X60003-12 Map-controlled thermostat; OEM-X60003-16 Oil pressure switch; OEM-X60003-21 Evap purge valve; OEM-X60003-22 Idle speed control, close; OEM-X60003-23 Idle speed control, open; OEM-X60003-33 Knock sensor 1; OEM-X60003-34 Knock sensor 2; OEM-X60003-44 Engine oil temperature; OEM-X60003-46 Knock sensor 3; OEM-X60003-47 Knock sensor 4; OEM-X60003-50 Oil level switch; OEM-X60003-9 VANOS exhaust solenoid |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-X60001-7 | Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed. | mapping-proposal |
Notes
Fit check: needs add-on. Resolve these before building: - No drive-by-wire; needs a cable-throttle conversion or an external DBW controller - Needs CAN (E46 K-bus/CAN); not documented for this ECU - No knock input; the stock knock sensor would be unused - Only 2 injector outputs for 6 injectors: batch / semi-sequential injection - Only 4 ignition outputs for 6 cylinders: wasted spark (pair coils per firing order) - This car has EWS 3.3 (rolling code) immobilizer; needs a delete/bypass Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Open items: - OEM-X60003 29: Intake camshaft position: no free cam_hall/cam_vr/frequency_in input on FuelTech FT450 - OEM-X60005 1: Ignition coil 5: no free ignition output on FuelTech FT450 - OEM-X60005 9: Ignition coil 6: no free ignition output on FuelTech FT450 - OEM-X60003 42: Throttle motor drive 1 (H-bridge): no free hbridge on FuelTech FT450 - OEM-X60003 43: Throttle motor drive 2 (H-bridge): no free hbridge on FuelTech FT450 Not wired: - OEM-X60001 7: Battery constant (terminal 30): FuelTech FT450 has no battery-constant input; not needed - OEM-X60003 33: Knock sensor 1: no free knock input on FuelTech FT450 - OEM-X60003 34: Knock sensor 2: no free knock input on FuelTech FT450 - OEM-X60003 46: Knock sensor 3: no free knock input on FuelTech FT450 - OEM-X60003 47: Knock sensor 4: no free knock input on FuelTech FT450 - OEM-X60003 22: Idle speed control, close: no free hbridge on FuelTech FT450 - OEM-X60003 23: Idle speed control, open: no free hbridge on FuelTech FT450 - OEM-X60002 12: O2 sensor heater, rear 2 (post-cat): no free heater_low_side/low_side/ls_hs/hbridge on FuelTech FT450 - OEM-X60002 2: O2 sensor heater, front 2 (pre-cat): no free heater_low_side/low_side/ls_hs/hbridge on FuelTech FT450 - OEM-X60002 6: O2 sensor heater, rear 1 (post-cat): no free heater_low_side/low_side/ls_hs/hbridge on FuelTech FT450 - OEM-X60003 10: VANOS intake solenoid: no free low_side/ls_hs/injector/hbridge on FuelTech FT450 - OEM-X60003 12: Map-controlled thermostat: no free low_side/ls_hs/injector/hbridge on FuelTech FT450 - OEM-X60003 21: Evap purge valve: no free low_side/ls_hs/injector/hbridge on FuelTech FT450 - OEM-X60003 9: VANOS exhaust solenoid: no free low_side/ls_hs/injector/hbridge on FuelTech FT450 - OEM-X60002 14: O2 sensor signal, rear 2 (post-cat): no free o2_narrowband/analog_0_5 on FuelTech FT450 - OEM-X60002 16: O2 sensor signal, rear 1 (post-cat): no free o2_narrowband/analog_0_5 on FuelTech FT450 - OEM-X60003 44: Engine oil temperature: no free thermistor/analog_0_5 on FuelTech FT450 - OEM-X60003 16: Oil pressure switch: no free switch_in/frequency_in/analog_0_5 on FuelTech FT450 - OEM-X60003 50: Oil level switch: no free switch_in/frequency_in/analog_0_5 on FuelTech FT450
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | oem_wiring_diagram | BMW WDS A6000 DME pin table, E83 X3 (M54B30/MS45) | https://wds.psjr.org/sv/e83/zinfo/E83_PA6000A.htm | — | — | — |
| 4 | vendor_doc | FuelTech FT450/FT550 ready harness manual (4 & 6 cylinder) — FT450 Connector A pinout | http://ftmanager.fueltech.com.br/downloads/manual/Portugues/Chicote_pronto_FT450-FT550.pdf | — | — | — |
| 2 | community_copy | bimmer-service: DME MSS54 (S54) pinout | https://www.bimmer-service.com/2025/11/14/dme-mss54-s54-pinout-schematic-diagram/ | — | — | — |
| 2 | community_copy | rusefi wiki: 2002 and 2004 BMW M3 E46 DME pinout (S54/MSS54) | https://github.com/rusefi/rusefi/wiki/2002-and-2004-BMW-M3-E46-DME-pinout | — | — | — |