BMW 3 Series E46 M3 2001–2006 (S54) → Link G4X AtomX 111-4000 (auto)
BMW 3 Series E46 M3 2001–2006 (S54) — Link — G4X AtomX
⚠ 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 | 8: read the Findings page before cutting any wire |
| Size of the job | 48 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 | G4XATOMX-A-A5 | 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 | G4XATOMX-A-A25 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-GND-1 | G4XATOMX-A-A34 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-X60003-15 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-X60003-35 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-X60003-36 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-X60003-37 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-X60003-45 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-X60003-49 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-X60004-12 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-X60004-7 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | SP-0V-1 | G4XATOMX-A-A24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-X60004-14 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-X60004-9 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | SP-5V1-1 | G4XATOMX-A-A32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-X60003-3 | G4XATOMX-A-A8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-X60003-30 | G4XATOMX-A-A9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-X60003-29 | G4XATOMX-A-A30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-X60003-33 | G4XATOMX-A-A6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-X60005-6 | G4XATOMX-A-A13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-X60005-7 | G4XATOMX-A-A12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-X60005-4 | G4XATOMX-A-A11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-X60005-8 | G4XATOMX-A-A10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-X60003-13 | G4XATOMX-A-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-X60003-6 | G4XATOMX-A-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-X60003-26 | G4XATOMX-A-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-X60003-7 | G4XATOMX-A-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-X60003-11 | G4XATOMX-A-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-X60003-8 | G4XATOMX-A-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-X60001-1 | G4XATOMX-A-A21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-X60002-23 | G4XATOMX-A-A20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-X60004-10 | G4XATOMX-A-A19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-X60002-1 | G4XATOMX-A-A18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-X60003-1 | G4XATOMX-A-A17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-X60003-32 | G4XATOMX-A-A22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-X60004-8 | G4XATOMX-A-A33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-X60003-28 | G4XATOMX-A-A15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-X60003-27 | G4XATOMX-A-A16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-X60003-16 | G4XATOMX-A-A31 | 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 | G4XATOMX-A-A5 | G4XATOMX-A-A24 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | G4XATOMX-A-A5 | G4XATOMX-A-A25 | open (OL) | +12 V supply must not touch power ground | |
| 3 | G4XATOMX-A-A24 | G4XATOMX-A-A32 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 4 | G4XATOMX-A-A25 | G4XATOMX-A-A32 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | G4XATOMX-A-A5 | G4XATOMX-A-A32 | open (OL) | +12 V supply 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
G4XATOMX-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | Injector 4 | — | W36 | — | 0.5 | OEM-X60003-7 | — | — | — |
| A10 | Ignition 4 | — | W32 | — | 0.5 | OEM-X60005-8 | — | — | — |
| A11 | Ignition 3 | — | W31 | — | 0.5 | OEM-X60005-4 | — | — | — |
| A12 | Ignition 2 | — | W30 | — | 0.5 | OEM-X60005-7 | — | — | — |
| A13 | Ignition 1 | — | W29 | — | 0.5 | OEM-X60005-6 | — | — | — |
| A15 | Analog Temp 1 | — | W46 | — | 0.5 | OEM-X60003-28 | — | — | — |
| A16 | Analog Temp 2 | — | W47 | — | 0.5 | OEM-X60003-27 | — | — | — |
| A17 | Analog Volt 1 | — | W43 | — | 0.5 | OEM-X60003-1 | — | — | — |
| A18 | Aux 4 | — | W42 | — | 0.5 | OEM-X60002-1 | — | — | — |
| A19 | Aux 3 | — | W41 | — | 0.5 | OEM-X60004-10 | — | — | — |
| A2 | Injector 3 | — | W35 | — | 0.5 | OEM-X60003-26 | — | — | — |
| A20 | Aux 2 | — | W40 | — | 0.5 | OEM-X60002-23 | — | — | — |
| A21 | Aux 1 | — | W39 | — | 0.5 | OEM-X60001-1 | — | — | — |
| A22 | Analog Volt 2 | — | W44 | — | 0.5 | OEM-X60003-32 | — | — | — |
| A24 | Sensor Ground | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| A25 | System Ground | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| A28 | CAN H | — | — | — | — | — | — | — | — |
| A29 | CAN L | — | — | — | — | — | — | — | — |
| A3 | Injector 2 | — | W34 | — | 0.5 | OEM-X60003-6 | — | — | — |
| A3 | Injector 2 | — | W38 | — | 0.5 | OEM-X60003-8 | — | — | — |
| A30 | Digital Input 1 | — | W27 | — | 0.5 | OEM-X60003-29 | — | — | — |
| A31 | Digital Input 2 | — | W48 | — | 0.5 | OEM-X60003-16 | — | — | — |
| A32 | +5V Out | — | W24 | — | 0.5 | SP-5V1-1 | — | — | — |
| A33 | Analog Volt 3 | — | W45 | — | 0.5 | OEM-X60004-8 | — | — | — |
| A34 | System Ground | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| A4 | Injector 1 | — | W33 | — | 0.5 | OEM-X60003-13 | — | — | — |
| A4 | Injector 1 | — | W37 | — | 0.5 | OEM-X60003-11 | — | — | — |
| A5 | +14V ECU Power | — | W5 | — | 0.85 | SP-14V-1 | — | — | — |
| A6 | Knock 1 | — | W28 | — | 0.5 | OEM-X60003-33 | — | — | — |
| A7 | Shield Ground | — | — | — | — | — | — | — | — |
| A8 | Trigger 1 | — | W25 | — | 0.5 | OEM-X60003-3 | — | — | — |
| A9 | Trigger 2 | — | W26 | — | 0.5 | OEM-X60003-30 | — | — | — |
OEM-X60001
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector relay control | — | W39 | — | 0.5 | G4XATOMX-A-A21 | — | — | — |
| 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) | — | W42 | — | 0.5 | G4XATOMX-A-A18 | — | — | — |
| 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 | — | W40 | — | 0.5 | G4XATOMX-A-A20 | — | — | — |
| 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 | — | W43 | — | 0.5 | G4XATOMX-A-A17 | — | — | — |
| 10 | VANOS intake solenoid | — | — | — | — | — | — | — | — |
| 11 | Injector cylinder 5 | — | W37 | — | 0.5 | G4XATOMX-A-A4 | — | — | — |
| 12 | Map-controlled thermostat | — | — | — | — | — | — | — | — |
| 13 | Injector cylinder 1 | — | W33 | — | 0.5 | G4XATOMX-A-A4 | — | — | — |
| 15 | Throttle ground | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Oil pressure switch | — | W48 | — | 0.5 | G4XATOMX-A-A31 | — | — | — |
| 21 | Evap purge valve | — | — | — | — | — | — | — | — |
| 22 | Idle speed control, close | — | — | — | — | — | — | — | — |
| 23 | Idle speed control, open | — | — | — | — | — | — | — | — |
| 26 | Injector cylinder 3 | — | W35 | — | 0.5 | G4XATOMX-A-A2 | — | — | — |
| 27 | Intake air temperature (IAT) | — | W47 | — | 0.5 | G4XATOMX-A-A16 | — | — | — |
| 28 | Engine coolant temperature (ECT) | — | W46 | — | 0.5 | G4XATOMX-A-A15 | — | — | — |
| 29 | Intake camshaft position | — | W27 | — | 0.5 | G4XATOMX-A-A30 | — | — | — |
| 3 | Crankshaft position | — | W25 | — | 0.5 | G4XATOMX-A-A8 | — | — | — |
| 30 | Exhaust camshaft position | — | W26 | — | 0.5 | G4XATOMX-A-A9 | — | — | — |
| 31 | Throttle position sensor 2 | — | — | — | — | — | — | — | — |
| 32 | Throttle position sensor 1 | — | W44 | — | 0.5 | G4XATOMX-A-A22 | — | — | — |
| 33 | Knock sensor 1 | — | W28 | — | 0.5 | G4XATOMX-A-A6 | — | — | — |
| 34 | Knock sensor 2 | — | — | — | — | — | — | — | — |
| 35 | ECT ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 36 | Intake camshaft ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 37 | Crankshaft ground | — | W16 | — | 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 | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 46 | Knock sensor 3 | — | — | — | — | — | — | — | — |
| 47 | Knock sensor 4 | — | — | — | — | — | — | — | — |
| 49 | Exhaust camshaft ground | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | Throttle (EDK/ITB) supply | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 50 | Oil level switch | — | — | — | — | — | — | — | — |
| 6 | Injector cylinder 2 | — | W34 | — | 0.5 | G4XATOMX-A-A3 | — | — | — |
| 7 | Injector cylinder 4 | — | W36 | — | 0.5 | G4XATOMX-A-A1 | — | — | — |
| 8 | Injector cylinder 6 | — | W38 | — | 0.5 | G4XATOMX-A-A3 | — | — | — |
| 9 | VANOS exhaust solenoid | — | — | — | — | — | — | — | — |
OEM-X60004
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | Fuel pump relay control | — | W41 | — | 0.5 | G4XATOMX-A-A19 | — | — | — |
| 12 | Pedal ground 2 | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 13 | Pedal position signal 2 | — | — | — | — | — | — | — | — |
| 14 | Pedal +5V supply 2 | — | W22 | — | 0.5 | SP-5V1-1 | — | — | — |
| 7 | Pedal ground 1 | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Pedal position signal 1 | — | W45 | — | 0.5 | G4XATOMX-A-A33 | — | — | — |
| 9 | Pedal +5V supply 1 | — | W23 | — | 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 | — | W31 | — | 0.5 | G4XATOMX-A-A11 | — | — | — |
| 5 | Ignition ground | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 6 | Ignition coil 1 | — | W29 | — | 0.5 | G4XATOMX-A-A13 | — | — | — |
| 7 | Ignition coil 2 | — | W30 | — | 0.5 | G4XATOMX-A-A12 | — | — | — |
| 8 | Ignition coil 4 | — | W32 | — | 0.5 | G4XATOMX-A-A10 | — | — | — |
| 9 | Ignition coil 6 | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W13 | — | 0.5 | OEM-X60003-15 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-X60003-35 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-X60003-36 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-X60003-37 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | OEM-X60003-45 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | OEM-X60003-49 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | OEM-X60004-12 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | OEM-X60004-7 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | G4XATOMX-A-A24 | — | — | — |
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 | G4XATOMX-A-A5 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W22 | — | 0.5 | OEM-X60004-14 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | OEM-X60004-9 | — | — | — |
| 1 | — | — | W24 | — | 0.5 | G4XATOMX-A-A32 | — | — | — |
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 | G4XATOMX-A-A25 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | G4XATOMX-A-A34 | — | — | — |
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 | G4XATOMX-A-A21 | Aux 1 | low_side_out | corroborated | |
| OEM-X60001-2 | DBW output-stage supply (P_DKSM+) | power_in | G4XATOMX-A-A5 | +14V ECU Power | power_in | single_source | |
| OEM-X60001-4 | Power ground | ground | G4XATOMX-A-A25 + G4XATOMX-A-A34 | System Ground + System Ground | ground | corroborated | |
| OEM-X60001-5 | Power ground | ground | G4XATOMX-A-A25 + G4XATOMX-A-A34 | System Ground + System Ground | ground | corroborated | |
| OEM-X60001-6 | Power ground | ground | G4XATOMX-A-A25 + G4XATOMX-A-A34 | System Ground + System 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 | G4XATOMX-A-A5 | +14V ECU Power | power_in | corroborated | |
| OEM-X60001-9 | DBW output-stage return (P_DKSM-) | ground | G4XATOMX-A-A25 + G4XATOMX-A-A34 | System Ground + System Ground | ground | single_source | |
| OEM-X60002-1 | O2 sensor heater, front 1 (pre-cat) | low_side_out | G4XATOMX-A-A18 | Aux 4 | 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 | G4XATOMX-A-A20 | Aux 2 | 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 | G4XATOMX-A-A17 | Analog Volt 1 | analog_in | corroborated | |
| OEM-X60003-10 | VANOS intake solenoid | low_side_out | — | — | — | corroborated | |
| OEM-X60003-11 | Injector cylinder 5 | injector_out | G4XATOMX-A-A4 | Injector 1 | injector_out | corroborated | |
| OEM-X60003-12 | Map-controlled thermostat | low_side_out | — | — | — | corroborated | |
| OEM-X60003-13 | Injector cylinder 1 | injector_out | G4XATOMX-A-A4 | Injector 1 | injector_out | corroborated | |
| OEM-X60003-15 | Throttle ground | sensor_ground | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-X60003-16 | Oil pressure switch | digital_in | G4XATOMX-A-A31 | Digital Input 2 | 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 | G4XATOMX-A-A2 | Injector 3 | injector_out | corroborated | |
| OEM-X60003-27 | Intake air temperature (IAT) | temp_in | G4XATOMX-A-A16 | Analog Temp 2 | temp_in | corroborated | |
| OEM-X60003-28 | Engine coolant temperature (ECT) | temp_in | G4XATOMX-A-A15 | Analog Temp 1 | temp_in | corroborated | |
| OEM-X60003-29 | Intake camshaft position | trigger_in | G4XATOMX-A-A30 | Digital Input 1 | digital_in | corroborated | |
| OEM-X60003-3 | Crankshaft position | trigger_in | G4XATOMX-A-A8 | Trigger 1 | trigger_in | corroborated | |
| OEM-X60003-30 | Exhaust camshaft position | trigger_in | G4XATOMX-A-A9 | Trigger 2 | trigger_in | corroborated | |
| OEM-X60003-31 | Throttle position sensor 2 | analog_in | — | — | — | corroborated | |
| OEM-X60003-32 | Throttle position sensor 1 | analog_in | G4XATOMX-A-A22 | Analog Volt 2 | analog_in | corroborated | |
| OEM-X60003-33 | Knock sensor 1 | knock_in | G4XATOMX-A-A6 | Knock 1 | knock_in | corroborated | |
| OEM-X60003-34 | Knock sensor 2 | knock_in | — | — | — | corroborated | |
| OEM-X60003-35 | ECT ground | sensor_ground | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-X60003-36 | Intake camshaft ground | sensor_ground | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-X60003-37 | Crankshaft ground | sensor_ground | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-X60003-4 | MAF supply | power_in | G4XATOMX-A-A5 | +14V ECU Power | 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 | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | 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 | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-X60003-5 | Throttle (EDK/ITB) supply | power_in | G4XATOMX-A-A5 | +14V ECU Power | power_in | corroborated | |
| OEM-X60003-50 | Oil level switch | digital_in | — | — | — | corroborated | |
| OEM-X60003-6 | Injector cylinder 2 | injector_out | G4XATOMX-A-A3 | Injector 2 | injector_out | corroborated | |
| OEM-X60003-7 | Injector cylinder 4 | injector_out | G4XATOMX-A-A1 | Injector 4 | injector_out | corroborated | |
| OEM-X60003-8 | Injector cylinder 6 | injector_out | G4XATOMX-A-A3 | Injector 2 | injector_out | corroborated | |
| OEM-X60003-9 | VANOS exhaust solenoid | low_side_out | — | — | — | corroborated | |
| OEM-X60004-10 | Fuel pump relay control | low_side_out | G4XATOMX-A-A19 | Aux 3 | low_side_out | corroborated | |
| OEM-X60004-12 | Pedal ground 2 | sensor_ground | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-X60004-13 | Pedal position signal 2 | analog_in | — | — | — | corroborated | |
| OEM-X60004-14 | Pedal +5V supply 2 | vref | G4XATOMX-A-A32 | +5V Out | vref | corroborated | |
| OEM-X60004-7 | Pedal ground 1 | sensor_ground | G4XATOMX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-X60004-8 | Pedal position signal 1 | analog_in | G4XATOMX-A-A33 | Analog Volt 3 | analog_in | corroborated | |
| OEM-X60004-9 | Pedal +5V supply 1 | vref | G4XATOMX-A-A32 | +5V Out | vref | corroborated | |
| OEM-X60005-1 | Ignition coil 5 | ignition_out | — | — | — | corroborated | |
| OEM-X60005-4 | Ignition coil 3 | ignition_out | G4XATOMX-A-A11 | Ignition 3 | ignition_out | corroborated | |
| OEM-X60005-5 | Ignition ground | ground | G4XATOMX-A-A25 + G4XATOMX-A-A34 | System Ground + System Ground | ground | corroborated | |
| OEM-X60005-6 | Ignition coil 1 | ignition_out | G4XATOMX-A-A13 | Ignition 1 | ignition_out | corroborated | |
| OEM-X60005-7 | Ignition coil 2 | ignition_out | G4XATOMX-A-A12 | Ignition 2 | ignition_out | corroborated | |
| OEM-X60005-8 | Ignition coil 4 | ignition_out | G4XATOMX-A-A10 | 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 | G4XATOMX-A-A5 | 0.85 | no route | +14V ECU Power | — | |
| 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 | G4XATOMX-A-A25 | 0.85 | no route | System Ground | — | |
| W12 | SP-GND-1 | G4XATOMX-A-A34 | 0.85 | no route | System Ground | — | |
| W13 | OEM-X60003-15 | SP-0V-1 | 0.5 | no route | Throttle ground | — | |
| W14 | OEM-X60003-35 | SP-0V-1 | 0.5 | no route | ECT ground | — | |
| W15 | OEM-X60003-36 | SP-0V-1 | 0.5 | no route | Intake camshaft ground | — | |
| W16 | OEM-X60003-37 | SP-0V-1 | 0.5 | no route | Crankshaft ground | — | |
| W17 | OEM-X60003-45 | SP-0V-1 | 0.5 | no route | Oil temperature ground | — | |
| W18 | OEM-X60003-49 | SP-0V-1 | 0.5 | no route | Exhaust camshaft ground | — | |
| W19 | OEM-X60004-12 | SP-0V-1 | 0.5 | no route | Pedal ground 2 | — | |
| W20 | OEM-X60004-7 | SP-0V-1 | 0.5 | no route | Pedal ground 1 | — | |
| W21 | SP-0V-1 | G4XATOMX-A-A24 | 0.5 | no route | Sensor Ground | — | |
| W22 | OEM-X60004-14 | SP-5V1-1 | 0.5 | no route | Pedal +5V supply 2 | — | |
| W23 | OEM-X60004-9 | SP-5V1-1 | 0.5 | no route | Pedal +5V supply 1 | — | |
| W24 | SP-5V1-1 | G4XATOMX-A-A32 | 0.5 | no route | +5V Out | — | |
| W25 | OEM-X60003-3 | G4XATOMX-A-A8 | 0.5 | no route | Crankshaft position | — | |
| W26 | OEM-X60003-30 | G4XATOMX-A-A9 | 0.5 | no route | Exhaust camshaft position | — | |
| W27 | OEM-X60003-29 | G4XATOMX-A-A30 | 0.5 | no route | Intake camshaft position | — | |
| W28 | OEM-X60003-33 | G4XATOMX-A-A6 | 0.5 | no route | Knock sensor 1 | — | |
| W29 | OEM-X60005-6 | G4XATOMX-A-A13 | 0.5 | no route | Ignition coil 1 | — | |
| W30 | OEM-X60005-7 | G4XATOMX-A-A12 | 0.5 | no route | Ignition coil 2 | — | |
| W31 | OEM-X60005-4 | G4XATOMX-A-A11 | 0.5 | no route | Ignition coil 3 | — | |
| W32 | OEM-X60005-8 | G4XATOMX-A-A10 | 0.5 | no route | Ignition coil 4 | — | |
| W33 | OEM-X60003-13 | G4XATOMX-A-A4 | 0.5 | no route | Injector cylinder 1 | — | |
| W34 | OEM-X60003-6 | G4XATOMX-A-A3 | 0.5 | no route | Injector cylinder 2 | — | |
| W35 | OEM-X60003-26 | G4XATOMX-A-A2 | 0.5 | no route | Injector cylinder 3 | — | |
| W36 | OEM-X60003-7 | G4XATOMX-A-A1 | 0.5 | no route | Injector cylinder 4 | — | |
| W37 | OEM-X60003-11 | G4XATOMX-A-A4 | 0.5 | no route | Injector cylinder 5 | — | |
| W38 | OEM-X60003-8 | G4XATOMX-A-A3 | 0.5 | no route | Injector cylinder 6 | — | |
| W39 | OEM-X60001-1 | G4XATOMX-A-A21 | 0.5 | no route | Injector relay control | — | |
| W40 | OEM-X60002-23 | G4XATOMX-A-A20 | 0.5 | no route | Main relay control | — | |
| W41 | OEM-X60004-10 | G4XATOMX-A-A19 | 0.5 | no route | Fuel pump relay control | — | |
| W42 | OEM-X60002-1 | G4XATOMX-A-A18 | 0.5 | no route | O2 sensor heater, front 1 (pre-cat) | — | |
| W43 | OEM-X60003-1 | G4XATOMX-A-A17 | 0.5 | no route | Mass air flow (MAF) signal | — | |
| W44 | OEM-X60003-32 | G4XATOMX-A-A22 | 0.5 | no route | Throttle position sensor 1 | — | |
| W45 | OEM-X60004-8 | G4XATOMX-A-A33 | 0.5 | no route | Pedal position signal 1 | — | |
| W46 | OEM-X60003-28 | G4XATOMX-A-A15 | 0.5 | no route | Engine coolant temperature (ECT) | — | |
| W47 | OEM-X60003-27 | G4XATOMX-A-A16 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W48 | OEM-X60003-16 | G4XATOMX-A-A31 | 0.5 | no route | Oil pressure switch | — |
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 (10)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | NET_MERGED | G4XATOMX-A-A3 + OEM-X60003-6 + OEM-X60003-8 | 2 different OEM functions share one net: OEM-X60003-6 Injector cylinder 2; OEM-X60003-8 Injector cylinder 6 |
| error | NET_MERGED | G4XATOMX-A-A4 + OEM-X60003-11 + OEM-X60003-13 | 2 different OEM functions share one net: OEM-X60003-11 Injector cylinder 5; OEM-X60003-13 Injector cylinder 1 |
| error | REQUIRED_UNMAPPED | OEM-X60003-31 | Required OEM function "Throttle position sensor 2" (analog_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-X60004-13 | Required OEM function "Pedal position signal 2" (analog_in) 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. |
| warn | NET_FAMILY | OEM-X60003-29 ↔ G4XATOMX-A-A30 | OEM-X60003-29 "Intake camshaft position" [trigger_in] is wired to G4XATOMX-A-A30 "Digital Input 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| info | UNMAPPED | OEM | 16 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-X60003-21 Evap purge valve; OEM-X60003-22 Idle speed control, close; OEM-X60003-23 Idle speed control, open; 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 - Only 4 ignition outputs for 6 cylinders: wasted spark (pair coils per firing order) - Only 4 injector outputs for 6 injectors: batch / semi-sequential injection - 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-X60005 1: Ignition coil 5: no free ignition output on Link G4X AtomX - OEM-X60005 9: Ignition coil 6: no free ignition output on Link G4X AtomX - OEM-X60003 42: Throttle motor drive 1 (H-bridge): no free hbridge on Link G4X AtomX - OEM-X60003 43: Throttle motor drive 2 (H-bridge): no free hbridge on Link G4X AtomX - OEM-X60003 31: Throttle position sensor 2: no free tps/analog_0_5 on Link G4X AtomX - OEM-X60004 13: Pedal position signal 2: no free tps/analog_0_5 on Link G4X AtomX Not wired: - OEM-X60001 7: Battery constant (terminal 30): Link G4X AtomX has no battery-constant input; not needed - OEM-X60003 34: Knock sensor 2: no free knock input on Link G4X AtomX - OEM-X60003 46: Knock sensor 3: no free knock input on Link G4X AtomX - OEM-X60003 47: Knock sensor 4: no free knock input on Link G4X AtomX - OEM-X60003 22: Idle speed control, close: no free hbridge on Link G4X AtomX - OEM-X60003 23: Idle speed control, open: no free hbridge on Link G4X AtomX - OEM-X60002 12: O2 sensor heater, rear 2 (post-cat): no free heater_low_side/low_side/ls_hs/hbridge on Link G4X AtomX - OEM-X60002 2: O2 sensor heater, front 2 (pre-cat): no free heater_low_side/low_side/ls_hs/hbridge on Link G4X AtomX - OEM-X60002 6: O2 sensor heater, rear 1 (post-cat): no free heater_low_side/low_side/ls_hs/hbridge on Link G4X AtomX - OEM-X60003 10: VANOS intake solenoid: no free low_side/ls_hs/injector/hbridge on Link G4X AtomX - OEM-X60003 12: Map-controlled thermostat: no free low_side/ls_hs/injector/hbridge on Link G4X AtomX - OEM-X60003 21: Evap purge valve: no free low_side/ls_hs/injector/hbridge on Link G4X AtomX - OEM-X60003 9: VANOS exhaust solenoid: no free low_side/ls_hs/injector/hbridge on Link G4X AtomX - OEM-X60002 14: O2 sensor signal, rear 2 (post-cat): no free o2_narrowband/analog_0_5 on Link G4X AtomX - OEM-X60002 16: O2 sensor signal, rear 1 (post-cat): no free o2_narrowband/analog_0_5 on Link G4X AtomX - OEM-X60003 44: Engine oil temperature: no free thermistor/analog_0_5 on Link G4X AtomX - OEM-X60003 50: Oil level switch: no free switch_in/frequency_in/analog_0_5 on Link G4X AtomX
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 | Link: G4X AtomX quickstart | https://linkecu.com/documentation/AtomXQuickstartGuide.pdf | archive | 2026-10-05 | 5fa903ea7bdf |
| 3 | community_copy | YourSpec: Link G4X AtomX ECU flying-lead harness wiring list | https://wpm.yourspec.com/projects/view/1462 | — | — | — |
| 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 | — | — | — |