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BMW 3 Series E46 M3 2001–2006 (S54) → MaxxECU MaxxECU MINI REV10+ (auto)

BMW 3 Series E46 M3 2001–2006 (S54) — MaxxECU — MaxxECU MINI
⚠ 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.

Statusdraft · not yet verified: nobody has reported building and running this harness
Open errors10: read the Findings page before cutting any wire
Size of the job48 wires · 10 connectors · 1 part lines
ToolsCrimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink
Order of work1. 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.

WireFromToGaugeColourCutLabelCrimp ACrimp BPin APin BContinuity
W1OEM-X60001-2SP-14V-10.85☐☐☐☐☐☐☐
W2OEM-X60001-8SP-14V-10.85☐☐☐☐☐☐☐
W3OEM-X60003-4SP-14V-10.85☐☐☐☐☐☐☐
W4OEM-X60003-5SP-14V-10.85☐☐☐☐☐☐☐
W5SP-14V-1MAXXECUMINI-C1-H40.85☐☐☐☐☐☐☐
W6OEM-X60001-4SP-GND-10.85☐☐☐☐☐☐☐
W7OEM-X60001-5SP-GND-10.85☐☐☐☐☐☐☐
W8OEM-X60001-6SP-GND-10.85☐☐☐☐☐☐☐
W9OEM-X60001-9SP-GND-10.85☐☐☐☐☐☐☐
W10OEM-X60005-5SP-GND-10.85☐☐☐☐☐☐☐
W11SP-GND-1MAXXECUMINI-C1-G40.85☐☐☐☐☐☐☐
W12OEM-X60003-15SP-0V-10.5☐☐☐☐☐☐☐
W13OEM-X60003-35SP-0V-10.5☐☐☐☐☐☐☐
W14OEM-X60003-36SP-0V-10.5☐☐☐☐☐☐☐
W15OEM-X60003-37SP-0V-10.5☐☐☐☐☐☐☐
W16OEM-X60003-45SP-0V-10.5☐☐☐☐☐☐☐
W17OEM-X60003-49SP-0V-10.5☐☐☐☐☐☐☐
W18OEM-X60004-12SP-0V-10.5☐☐☐☐☐☐☐
W19OEM-X60004-7SP-0V-10.5☐☐☐☐☐☐☐
W20SP-0V-1MAXXECUMINI-C1-A20.5☐☐☐☐☐☐☐
W21SP-0V-1MAXXECUMINI-C1-B30.5☐☐☐☐☐☐☐
W22SP-0V-1MAXXECUMINI-C1-B40.5☐☐☐☐☐☐☐
W23SP-0V-1MAXXECUMINI-C1-D40.5☐☐☐☐☐☐☐
W24OEM-X60004-14SP-5V1-10.5☐☐☐☐☐☐☐
W25OEM-X60004-9SP-5V1-10.5☐☐☐☐☐☐☐
W26SP-5V1-1MAXXECUMINI-C1-E20.5☐☐☐☐☐☐☐
W27OEM-X60003-3MAXXECUMINI-C1-A10.5☐☐☐☐☐☐☐
W28OEM-X60005-6MAXXECUMINI-C1-F10.5☐☐☐☐☐☐☐
W29OEM-X60005-7MAXXECUMINI-C1-F20.5☐☐☐☐☐☐☐
W30OEM-X60005-4MAXXECUMINI-C1-F30.5☐☐☐☐☐☐☐
W31OEM-X60005-8MAXXECUMINI-C1-F40.5☐☐☐☐☐☐☐
W32OEM-X60003-13MAXXECUMINI-C1-G30.5☐☐☐☐☐☐☐
W33OEM-X60003-6MAXXECUMINI-C1-H10.5☐☐☐☐☐☐☐
W34OEM-X60003-26MAXXECUMINI-C1-H20.5☐☐☐☐☐☐☐
W35OEM-X60003-7MAXXECUMINI-C1-H30.5☐☐☐☐☐☐☐
W36OEM-X60003-11MAXXECUMINI-C1-G30.5☐☐☐☐☐☐☐
W37OEM-X60003-8MAXXECUMINI-C1-H10.5☐☐☐☐☐☐☐
W38OEM-X60001-1MAXXECUMINI-C1-G20.5☐☐☐☐☐☐☐
W39OEM-X60002-23MAXXECUMINI-C1-G10.5☐☐☐☐☐☐☐
W40OEM-X60004-10MAXXECUMINI-C1-E10.5☐☐☐☐☐☐☐
W41OEM-X60002-1MAXXECUMINI-C1-D10.5☐☐☐☐☐☐☐
W42OEM-X60003-1MAXXECUMINI-C1-C30.5☐☐☐☐☐☐☐
W43OEM-X60003-32MAXXECUMINI-C1-D20.5☐☐☐☐☐☐☐
W44OEM-X60004-8MAXXECUMINI-C1-C40.5☐☐☐☐☐☐☐
W45OEM-X60003-28MAXXECUMINI-C1-C10.5☐☐☐☐☐☐☐
W46OEM-X60003-27MAXXECUMINI-C1-C20.5☐☐☐☐☐☐☐
W47OEM-X60003-16MAXXECUMINI-C1-B10.5☐☐☐☐☐☐☐
W48OEM-X60003-50MAXXECUMINI-C1-B20.5☐☐☐☐☐☐☐

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 AProbe BExpectWhyReading
1MAXXECUMINI-C1-H4MAXXECUMINI-C1-A2open (OL)+12 V supply must not touch sensor ground
2MAXXECUMINI-C1-H4MAXXECUMINI-C1-G4open (OL)+12 V supply must not touch power ground
3MAXXECUMINI-C1-A2MAXXECUMINI-C1-E2open (OL)sensor ground must not touch 5 V sensor reference
4MAXXECUMINI-C1-G4MAXXECUMINI-C1-E2open (OL)power ground must not touch 5 V sensor reference
5MAXXECUMINI-C1-H4MAXXECUMINI-C1-E2open (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

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Schematic

MAXXECUMINI-C1OEM-X60001OEM-X60002OEM-X60003OEM-X60004OEM-X60005SP-0VSP-14VSP-5V1SP-GND

Connectors

MAXXECUMINI-C1

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
A1TRIGGER—W27—0.5OEM-X60003-3———
A2TRIGGER GND—W20—0.5SP-0V-1———
B1DIN 1 (Hall only)—W47—0.5OEM-X60003-16———
B2DIN 2 (Hall only)—W48—0.5OEM-X60003-50———
B3SENSOR GND—W21—0.5SP-0V-1———
B4SENSOR GND—W22—0.5SP-0V-1———
C1CLT—W45—0.5OEM-X60003-28———
C2IAT—W46—0.5OEM-X60003-27———
C3AIN 3 (0-5V)—W42—0.5OEM-X60003-1———
C4AIN 4 (0-5V)—W44—0.5OEM-X60004-8———
D1GPO 8/TACHO—W41—0.5OEM-X60002-1———
D2TPS—W43—0.5OEM-X60003-32———
D3GND Shield————————
D4SENSOR GND—W23—0.5SP-0V-1———
E1GPO 3—W40—0.5OEM-X60004-10———
E2+5V sensor supply—W26—0.5SP-5V1-1———
E3CAN L————————
E4CAN H————————
F1IGN 1—W28—0.5OEM-X60005-6———
F2IGN 2—W29—0.5OEM-X60005-7———
F3IGN 3—W30—0.5OEM-X60005-4———
F4IGN 4—W31—0.5OEM-X60005-8———
G1GPO 2—W39—0.5OEM-X60002-23———
G2GPO 1—W38—0.5OEM-X60001-1———
G3INJ 1—W32—0.5OEM-X60003-13———
G3INJ 1—W36—0.5OEM-X60003-11———
G4ENGINE GND—W11—0.85SP-GND-1———
H1INJ 2—W33—0.5OEM-X60003-6———
H1INJ 2—W37—0.5OEM-X60003-8———
H2INJ 3—W34—0.5OEM-X60003-26———
H3INJ 4—W35—0.5OEM-X60003-7———
H4+12V (ECU power supply)—W5—0.85SP-14V-1———

OEM-X60001

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Injector relay control—W38—0.5MAXXECUMINI-C1-G2———
2DBW output-stage supply (P_DKSM+)—W1—0.85SP-14V-1———
4Power ground—W6—0.85SP-GND-1———
5Power ground—W7—0.85SP-GND-1———
6Power ground—W8—0.85SP-GND-1———
7Battery constant (terminal 30)————————
8ECU main power (terminal 87 via main relay)—W2—0.85SP-14V-1———
9DBW output-stage return (P_DKSM-)—W9—0.85SP-GND-1———

OEM-X60002

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1O2 sensor heater, front 1 (pre-cat)—W41—0.5MAXXECUMINI-C1-D1———
12O2 sensor heater, rear 2 (post-cat)————————
14O2 sensor signal, rear 2 (post-cat)————————
16O2 sensor signal, rear 1 (post-cat)————————
2O2 sensor heater, front 2 (pre-cat)————————
23Main relay control—W39—0.5MAXXECUMINI-C1-G1———
6O2 sensor heater, rear 1 (post-cat)————————

OEM-X60003

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Mass air flow (MAF) signal—W42—0.5MAXXECUMINI-C1-C3———
10VANOS intake solenoid————————
11Injector cylinder 5—W36—0.5MAXXECUMINI-C1-G3———
12Map-controlled thermostat————————
13Injector cylinder 1—W32—0.5MAXXECUMINI-C1-G3———
15Throttle ground—W12—0.5SP-0V-1———
16Oil pressure switch—W47—0.5MAXXECUMINI-C1-B1———
21Evap purge valve————————
22Idle speed control, close————————
23Idle speed control, open————————
26Injector cylinder 3—W34—0.5MAXXECUMINI-C1-H2———
27Intake air temperature (IAT)—W46—0.5MAXXECUMINI-C1-C2———
28Engine coolant temperature (ECT)—W45—0.5MAXXECUMINI-C1-C1———
29Intake camshaft position————————
3Crankshaft position—W27—0.5MAXXECUMINI-C1-A1———
30Exhaust camshaft position————————
31Throttle position sensor 2————————
32Throttle position sensor 1—W43—0.5MAXXECUMINI-C1-D2———
33Knock sensor 1————————
34Knock sensor 2————————
35ECT ground—W13—0.5SP-0V-1———
36Intake camshaft ground—W14—0.5SP-0V-1———
37Crankshaft ground—W15—0.5SP-0V-1———
4MAF supply—W3—0.85SP-14V-1———
42Throttle motor drive 1 (H-bridge)————————
43Throttle motor drive 2 (H-bridge)————————
44Engine oil temperature————————
45Oil temperature ground—W16—0.5SP-0V-1———
46Knock sensor 3————————
47Knock sensor 4————————
49Exhaust camshaft ground—W17—0.5SP-0V-1———
5Throttle (EDK/ITB) supply—W4—0.85SP-14V-1———
50Oil level switch—W48—0.5MAXXECUMINI-C1-B2———
6Injector cylinder 2—W33—0.5MAXXECUMINI-C1-H1———
7Injector cylinder 4—W35—0.5MAXXECUMINI-C1-H3———
8Injector cylinder 6—W37—0.5MAXXECUMINI-C1-H1———
9VANOS exhaust solenoid————————

OEM-X60004

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
10Fuel pump relay control—W40—0.5MAXXECUMINI-C1-E1———
12Pedal ground 2—W18—0.5SP-0V-1———
13Pedal position signal 2————————
14Pedal +5V supply 2—W24—0.5SP-5V1-1———
7Pedal ground 1—W19—0.5SP-0V-1———
8Pedal position signal 1—W44—0.5MAXXECUMINI-C1-C4———
9Pedal +5V supply 1—W25—0.5SP-5V1-1———

OEM-X60005

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1Ignition coil 5————————
4Ignition coil 3—W30—0.5MAXXECUMINI-C1-F3———
5Ignition ground—W10—0.85SP-GND-1———
6Ignition coil 1—W28—0.5MAXXECUMINI-C1-F1———
7Ignition coil 2—W29—0.5MAXXECUMINI-C1-F2———
8Ignition coil 4—W31—0.5MAXXECUMINI-C1-F4———
9Ignition coil 6————————

SP-0V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W12—0.5OEM-X60003-15———
1——W13—0.5OEM-X60003-35———
1——W14—0.5OEM-X60003-36———
1——W15—0.5OEM-X60003-37———
1——W16—0.5OEM-X60003-45———
1——W17—0.5OEM-X60003-49———
1——W18—0.5OEM-X60004-12———
1——W19—0.5OEM-X60004-7———
1——W20—0.5MAXXECUMINI-C1-A2———
1——W21—0.5MAXXECUMINI-C1-B3———
1——W22—0.5MAXXECUMINI-C1-B4———
1——W23—0.5MAXXECUMINI-C1-D4———

SP-14V

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W1—0.85OEM-X60001-2———
1——W2—0.85OEM-X60001-8———
1——W3—0.85OEM-X60003-4———
1——W4—0.85OEM-X60003-5———
1——W5—0.85MAXXECUMINI-C1-H4———

SP-5V1

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W24—0.5OEM-X60004-14———
1——W25—0.5OEM-X60004-9———
1——W26—0.5MAXXECUMINI-C1-E2———

SP-GND

CavityFunctionSignalWireColourGauge (mm²)DestinationTerminalSealPlug
1——W6—0.85OEM-X60001-4———
1——W7—0.85OEM-X60001-5———
1——W8—0.85OEM-X60001-6———
1——W9—0.85OEM-X60001-9———
1——W10—0.85OEM-X60005-5———
1——W11—0.85MAXXECUMINI-C1-G4———

Pin map

OEM pointOEM functionOEM familyTarget pointTarget functionTarget familyWire colourEvidence
OEM-X60001-1Injector relay controllow_side_outMAXXECUMINI-C1-G2GPO 1low_side_outcorroborated
OEM-X60001-2DBW output-stage supply (P_DKSM+)power_inMAXXECUMINI-C1-H4+12V (ECU power supply)power_insingle_source
OEM-X60001-4Power groundgroundMAXXECUMINI-C1-G4ENGINE GNDgroundcorroborated
OEM-X60001-5Power groundgroundMAXXECUMINI-C1-G4ENGINE GNDgroundcorroborated
OEM-X60001-6Power groundgroundMAXXECUMINI-C1-G4ENGINE GNDgroundcorroborated
OEM-X60001-7Battery constant (terminal 30)power_in———corroborated
OEM-X60001-8ECU main power (terminal 87 via main relay)power_inMAXXECUMINI-C1-H4+12V (ECU power supply)power_incorroborated
OEM-X60001-9DBW output-stage return (P_DKSM-)groundMAXXECUMINI-C1-G4ENGINE GNDgroundsingle_source
OEM-X60002-1O2 sensor heater, front 1 (pre-cat)low_side_outMAXXECUMINI-C1-D1GPO 8/TACHOlow_side_outcorroborated
OEM-X60002-12O2 sensor heater, rear 2 (post-cat)low_side_out———corroborated
OEM-X60002-14O2 sensor signal, rear 2 (post-cat)lambda_nb_in———corroborated
OEM-X60002-16O2 sensor signal, rear 1 (post-cat)lambda_nb_in———corroborated
OEM-X60002-2O2 sensor heater, front 2 (pre-cat)low_side_out———corroborated
OEM-X60002-23Main relay controllow_side_outMAXXECUMINI-C1-G1GPO 2low_side_outcorroborated
OEM-X60002-6O2 sensor heater, rear 1 (post-cat)low_side_out———corroborated
OEM-X60003-1Mass air flow (MAF) signalanalog_inMAXXECUMINI-C1-C3AIN 3 (0-5V)analog_incorroborated
OEM-X60003-10VANOS intake solenoidlow_side_out———corroborated
OEM-X60003-11Injector cylinder 5injector_outMAXXECUMINI-C1-G3INJ 1injector_outcorroborated
OEM-X60003-12Map-controlled thermostatlow_side_out———corroborated
OEM-X60003-13Injector cylinder 1injector_outMAXXECUMINI-C1-G3INJ 1injector_outcorroborated
OEM-X60003-15Throttle groundsensor_groundMAXXECUMINI-C1-A2 + MAXXECUMINI-C1-B3 + MAXXECUMINI-C1-B4 + MAXXECUMINI-C1-D4TRIGGER GND + SENSOR GND + SENSOR GND + SENSOR GNDsensor_groundcorroborated
OEM-X60003-16Oil pressure switchdigital_inMAXXECUMINI-C1-B1DIN 1 (Hall only)digital_incorroborated
OEM-X60003-21Evap purge valvelow_side_out———corroborated
OEM-X60003-22Idle speed control, closehbridge_out———corroborated
OEM-X60003-23Idle speed control, openhbridge_out———corroborated
OEM-X60003-26Injector cylinder 3injector_outMAXXECUMINI-C1-H2INJ 3injector_outcorroborated
OEM-X60003-27Intake air temperature (IAT)temp_inMAXXECUMINI-C1-C2IATtemp_incorroborated
OEM-X60003-28Engine coolant temperature (ECT)temp_inMAXXECUMINI-C1-C1CLTtemp_incorroborated
OEM-X60003-29Intake camshaft positiontrigger_in———corroborated
OEM-X60003-3Crankshaft positiontrigger_inMAXXECUMINI-C1-A1TRIGGERtrigger_incorroborated
OEM-X60003-30Exhaust camshaft positiontrigger_in———corroborated
OEM-X60003-31Throttle position sensor 2analog_in———corroborated
OEM-X60003-32Throttle position sensor 1analog_inMAXXECUMINI-C1-D2TPSanalog_incorroborated
OEM-X60003-33Knock sensor 1knock_in———corroborated
OEM-X60003-34Knock sensor 2knock_in———corroborated
OEM-X60003-35ECT groundsensor_groundMAXXECUMINI-C1-A2 + MAXXECUMINI-C1-B3 + MAXXECUMINI-C1-B4 + MAXXECUMINI-C1-D4TRIGGER GND + SENSOR GND + SENSOR GND + SENSOR GNDsensor_groundcorroborated
OEM-X60003-36Intake camshaft groundsensor_groundMAXXECUMINI-C1-A2 + MAXXECUMINI-C1-B3 + MAXXECUMINI-C1-B4 + MAXXECUMINI-C1-D4TRIGGER GND + SENSOR GND + SENSOR GND + SENSOR GNDsensor_groundcorroborated
OEM-X60003-37Crankshaft groundsensor_groundMAXXECUMINI-C1-A2 + MAXXECUMINI-C1-B3 + MAXXECUMINI-C1-B4 + MAXXECUMINI-C1-D4TRIGGER GND + SENSOR GND + SENSOR GND + SENSOR GNDsensor_groundcorroborated
OEM-X60003-4MAF supplypower_inMAXXECUMINI-C1-H4+12V (ECU power supply)power_incorroborated
OEM-X60003-42Throttle motor drive 1 (H-bridge)hbridge_out———corroborated
OEM-X60003-43Throttle motor drive 2 (H-bridge)hbridge_out———corroborated
OEM-X60003-44Engine oil temperaturetemp_in———corroborated
OEM-X60003-45Oil temperature groundsensor_groundMAXXECUMINI-C1-A2 + MAXXECUMINI-C1-B3 + MAXXECUMINI-C1-B4 + MAXXECUMINI-C1-D4TRIGGER GND + SENSOR GND + SENSOR GND + SENSOR GNDsensor_groundcorroborated
OEM-X60003-46Knock sensor 3knock_in———corroborated
OEM-X60003-47Knock sensor 4knock_in———corroborated
OEM-X60003-49Exhaust camshaft groundsensor_groundMAXXECUMINI-C1-A2 + MAXXECUMINI-C1-B3 + MAXXECUMINI-C1-B4 + MAXXECUMINI-C1-D4TRIGGER GND + SENSOR GND + SENSOR GND + SENSOR GNDsensor_groundcorroborated
OEM-X60003-5Throttle (EDK/ITB) supplypower_inMAXXECUMINI-C1-H4+12V (ECU power supply)power_incorroborated
OEM-X60003-50Oil level switchdigital_inMAXXECUMINI-C1-B2DIN 2 (Hall only)digital_incorroborated
OEM-X60003-6Injector cylinder 2injector_outMAXXECUMINI-C1-H1INJ 2injector_outcorroborated
OEM-X60003-7Injector cylinder 4injector_outMAXXECUMINI-C1-H3INJ 4injector_outcorroborated
OEM-X60003-8Injector cylinder 6injector_outMAXXECUMINI-C1-H1INJ 2injector_outcorroborated
OEM-X60003-9VANOS exhaust solenoidlow_side_out———corroborated
OEM-X60004-10Fuel pump relay controllow_side_outMAXXECUMINI-C1-E1GPO 3low_side_outcorroborated
OEM-X60004-12Pedal ground 2sensor_groundMAXXECUMINI-C1-A2 + MAXXECUMINI-C1-B3 + MAXXECUMINI-C1-B4 + MAXXECUMINI-C1-D4TRIGGER GND + SENSOR GND + SENSOR GND + SENSOR GNDsensor_groundcorroborated
OEM-X60004-13Pedal position signal 2analog_in———corroborated
OEM-X60004-14Pedal +5V supply 2vrefMAXXECUMINI-C1-E2+5V sensor supplyvrefcorroborated
OEM-X60004-7Pedal ground 1sensor_groundMAXXECUMINI-C1-A2 + MAXXECUMINI-C1-B3 + MAXXECUMINI-C1-B4 + MAXXECUMINI-C1-D4TRIGGER GND + SENSOR GND + SENSOR GND + SENSOR GNDsensor_groundcorroborated
OEM-X60004-8Pedal position signal 1analog_inMAXXECUMINI-C1-C4AIN 4 (0-5V)analog_incorroborated
OEM-X60004-9Pedal +5V supply 1vrefMAXXECUMINI-C1-E2+5V sensor supplyvrefcorroborated
OEM-X60005-1Ignition coil 5ignition_out———corroborated
OEM-X60005-4Ignition coil 3ignition_outMAXXECUMINI-C1-F3IGN 3ignition_outcorroborated
OEM-X60005-5Ignition groundgroundMAXXECUMINI-C1-G4ENGINE GNDgroundcorroborated
OEM-X60005-6Ignition coil 1ignition_outMAXXECUMINI-C1-F1IGN 1ignition_outcorroborated
OEM-X60005-7Ignition coil 2ignition_outMAXXECUMINI-C1-F2IGN 2ignition_outcorroborated
OEM-X60005-8Ignition coil 4ignition_outMAXXECUMINI-C1-F4IGN 4ignition_outcorroborated
OEM-X60005-9Ignition coil 6ignition_out———corroborated

Cut list

WireFromToGauge (mm²)ColourLengthSignalIdent
W1OEM-X60001-2SP-14V-10.85no routeDBW output-stage supply (P_DKSM+)—
W2OEM-X60001-8SP-14V-10.85no routeECU main power (terminal 87 via main relay)—
W3OEM-X60003-4SP-14V-10.85no routeMAF supply—
W4OEM-X60003-5SP-14V-10.85no routeThrottle (EDK/ITB) supply—
W5SP-14V-1MAXXECUMINI-C1-H40.85no route+12V (ECU power supply)—
W6OEM-X60001-4SP-GND-10.85no routePower ground—
W7OEM-X60001-5SP-GND-10.85no routePower ground—
W8OEM-X60001-6SP-GND-10.85no routePower ground—
W9OEM-X60001-9SP-GND-10.85no routeDBW output-stage return (P_DKSM-)—
W10OEM-X60005-5SP-GND-10.85no routeIgnition ground—
W11SP-GND-1MAXXECUMINI-C1-G40.85no routeENGINE GND—
W12OEM-X60003-15SP-0V-10.5no routeThrottle ground—
W13OEM-X60003-35SP-0V-10.5no routeECT ground—
W14OEM-X60003-36SP-0V-10.5no routeIntake camshaft ground—
W15OEM-X60003-37SP-0V-10.5no routeCrankshaft ground—
W16OEM-X60003-45SP-0V-10.5no routeOil temperature ground—
W17OEM-X60003-49SP-0V-10.5no routeExhaust camshaft ground—
W18OEM-X60004-12SP-0V-10.5no routePedal ground 2—
W19OEM-X60004-7SP-0V-10.5no routePedal ground 1—
W20SP-0V-1MAXXECUMINI-C1-A20.5no routeTRIGGER GND—
W21SP-0V-1MAXXECUMINI-C1-B30.5no routeSENSOR GND—
W22SP-0V-1MAXXECUMINI-C1-B40.5no routeSENSOR GND—
W23SP-0V-1MAXXECUMINI-C1-D40.5no routeSENSOR GND—
W24OEM-X60004-14SP-5V1-10.5no routePedal +5V supply 2—
W25OEM-X60004-9SP-5V1-10.5no routePedal +5V supply 1—
W26SP-5V1-1MAXXECUMINI-C1-E20.5no route+5V sensor supply—
W27OEM-X60003-3MAXXECUMINI-C1-A10.5no routeCrankshaft position—
W28OEM-X60005-6MAXXECUMINI-C1-F10.5no routeIgnition coil 1—
W29OEM-X60005-7MAXXECUMINI-C1-F20.5no routeIgnition coil 2—
W30OEM-X60005-4MAXXECUMINI-C1-F30.5no routeIgnition coil 3—
W31OEM-X60005-8MAXXECUMINI-C1-F40.5no routeIgnition coil 4—
W32OEM-X60003-13MAXXECUMINI-C1-G30.5no routeInjector cylinder 1—
W33OEM-X60003-6MAXXECUMINI-C1-H10.5no routeInjector cylinder 2—
W34OEM-X60003-26MAXXECUMINI-C1-H20.5no routeInjector cylinder 3—
W35OEM-X60003-7MAXXECUMINI-C1-H30.5no routeInjector cylinder 4—
W36OEM-X60003-11MAXXECUMINI-C1-G30.5no routeInjector cylinder 5—
W37OEM-X60003-8MAXXECUMINI-C1-H10.5no routeInjector cylinder 6—
W38OEM-X60001-1MAXXECUMINI-C1-G20.5no routeInjector relay control—
W39OEM-X60002-23MAXXECUMINI-C1-G10.5no routeMain relay control—
W40OEM-X60004-10MAXXECUMINI-C1-E10.5no routeFuel pump relay control—
W41OEM-X60002-1MAXXECUMINI-C1-D10.5no routeO2 sensor heater, front 1 (pre-cat)—
W42OEM-X60003-1MAXXECUMINI-C1-C30.5no routeMass air flow (MAF) signal—
W43OEM-X60003-32MAXXECUMINI-C1-D20.5no routeThrottle position sensor 1—
W44OEM-X60004-8MAXXECUMINI-C1-C40.5no routePedal position signal 1—
W45OEM-X60003-28MAXXECUMINI-C1-C10.5no routeEngine coolant temperature (ECT)—
W46OEM-X60003-27MAXXECUMINI-C1-C20.5no routeIntake air temperature (IAT)—
W47OEM-X60003-16MAXXECUMINI-C1-B10.5no routeOil pressure switch—
W48OEM-X60003-50MAXXECUMINI-C1-B20.5no routeOil level switch—

Bill of materials

CategoryPart numberManufacturerDescriptionQtyUnit
connectorBMW-E46-MSS54-CONNBMWE46 DME (MSS54) harness connector1.000ea

ECU setup sheet

RoleEngine refEngine signalSensorECU pointECU functionECU classSetup flag
No configured channels.

Findings

Open (11)

SeverityCodeSubjectMessage
errorNET_MERGEDMAXXECUMINI-C1-G3 + OEM-X60003-11 + OEM-X60003-132 different OEM functions share one net: OEM-X60003-11 Injector cylinder 5; OEM-X60003-13 Injector cylinder 1
errorNET_MERGEDMAXXECUMINI-C1-H1 + OEM-X60003-6 + OEM-X60003-82 different OEM functions share one net: OEM-X60003-6 Injector cylinder 2; OEM-X60003-8 Injector cylinder 6
errorREQUIRED_UNMAPPEDOEM-X60003-29Required OEM function "Intake camshaft position" (trigger_in) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-X60003-30Required OEM function "Exhaust camshaft position" (trigger_in) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-X60003-31Required OEM function "Throttle position sensor 2" (analog_in) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-X60003-42Required OEM function "Throttle motor drive 1 (H-bridge)" (hbridge_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-X60003-43Required OEM function "Throttle motor drive 2 (H-bridge)" (hbridge_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-X60004-13Required OEM function "Pedal position signal 2" (analog_in) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-X60005-1Required OEM function "Ignition coil 5" (ignition_out) is not connected to the new ECU.
errorREQUIRED_UNMAPPEDOEM-X60005-9Required OEM function "Ignition coil 6" (ignition_out) is not connected to the new ECU.
infoUNMAPPEDOEM16 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-X60003-33 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-X60003-9 VANOS exhaust solenoid

Accepted (1)

CodeSubjectReasonBy
REQUIRED_UNMAPPEDOEM-X60001-7Battery-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 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-X60003 30: Exhaust camshaft position: no free cam_hall/cam_vr/frequency_in input on MaxxECU MaxxECU MINI - OEM-X60003 29: Intake camshaft position: no free cam_hall/cam_vr/frequency_in input on MaxxECU MaxxECU MINI - OEM-X60005 1: Ignition coil 5: no free ignition output on MaxxECU MaxxECU MINI - OEM-X60005 9: Ignition coil 6: no free ignition output on MaxxECU MaxxECU MINI - OEM-X60003 42: Throttle motor drive 1 (H-bridge): no free hbridge on MaxxECU MaxxECU MINI - OEM-X60003 43: Throttle motor drive 2 (H-bridge): no free hbridge on MaxxECU MaxxECU MINI - OEM-X60003 31: Throttle position sensor 2: no free tps/analog_0_5 on MaxxECU MaxxECU MINI - OEM-X60004 13: Pedal position signal 2: no free tps/analog_0_5 on MaxxECU MaxxECU MINI Not wired: - OEM-X60001 7: Battery constant (terminal 30): MaxxECU MaxxECU MINI has no battery-constant input; not needed - OEM-X60003 33: Knock sensor 1: no free knock input on MaxxECU MaxxECU MINI - OEM-X60003 34: Knock sensor 2: no free knock input on MaxxECU MaxxECU MINI - OEM-X60003 46: Knock sensor 3: no free knock input on MaxxECU MaxxECU MINI - OEM-X60003 47: Knock sensor 4: no free knock input on MaxxECU MaxxECU MINI - OEM-X60003 22: Idle speed control, close: no free hbridge on MaxxECU MaxxECU MINI - OEM-X60003 23: Idle speed control, open: no free hbridge on MaxxECU MaxxECU MINI - OEM-X60002 12: O2 sensor heater, rear 2 (post-cat): no free heater_low_side/low_side/ls_hs/hbridge on MaxxECU MaxxECU MINI - OEM-X60002 2: O2 sensor heater, front 2 (pre-cat): no free heater_low_side/low_side/ls_hs/hbridge on MaxxECU MaxxECU MINI - OEM-X60002 6: O2 sensor heater, rear 1 (post-cat): no free heater_low_side/low_side/ls_hs/hbridge on MaxxECU MaxxECU MINI - OEM-X60003 10: VANOS intake solenoid: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-X60003 12: Map-controlled thermostat: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-X60003 21: Evap purge valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-X60003 9: VANOS exhaust solenoid: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-X60002 14: O2 sensor signal, rear 2 (post-cat): no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU MINI - OEM-X60002 16: O2 sensor signal, rear 1 (post-cat): no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU MINI - OEM-X60003 44: Engine oil temperature: no free thermistor/analog_0_5 on MaxxECU MaxxECU MINI

Sources

ReliabilityKindTitleURLArchiveCapturedSHA-256
4oem_wiring_diagramBMW WDS A6000 DME pin table, E83 X3 (M54B30/MS45)https://wds.psjr.org/sv/e83/zinfo/E83_PA6000A.htm———
4vendor_docMaxxECU GEN1 pinout (MINI / STREET / SPORT / V1 / RACE / PRO)http://www.maxxecu.com/webhelp/wirings-maxxecu_pinout.htmlarchive2026-10-052e37b6814690
2community_copybimmer-service: DME MSS54 (S54) pinouthttps://www.bimmer-service.com/2025/11/14/dme-mss54-s54-pinout-schematic-diagram/———
2community_copyrusefi 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———