MX-5 Miata NB2 2001-05 (BP-Z3, VVT) → MaxxECU MaxxECU MINI REV10+ (auto)
MX-5 Miata NB2 2001-05 (BP-Z3, VVT) — MaxxECU — MaxxECU MINI
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-08
Before you start
| Status | draft · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | 1: read the Findings page before cutting any wire |
| Size of the job | 31 wires · 7 connectors · 0 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-2-P | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-4-AF | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | MAXXECUMINI-C1-H4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-3-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-3-B | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-4-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | MAXXECUMINI-C1-G4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-4-O | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-0V-1 | MAXXECUMINI-C1-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-0V-1 | MAXXECUMINI-C1-B3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-0V-1 | MAXXECUMINI-C1-B4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-0V-1 | MAXXECUMINI-C1-D4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-4-L | MAXXECUMINI-C1-E2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-3-Y | MAXXECUMINI-C1-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-3-F | MAXXECUMINI-C1-F1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-3-I | MAXXECUMINI-C1-F2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-2-A | MAXXECUMINI-C1-G3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-2-D | MAXXECUMINI-C1-H1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-2-G | MAXXECUMINI-C1-H2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-2-J | MAXXECUMINI-C1-H3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-2-B | MAXXECUMINI-C1-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-2-C | MAXXECUMINI-C1-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-2-K | MAXXECUMINI-C1-E1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-2-M | MAXXECUMINI-C1-D1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-4-X | MAXXECUMINI-C1-C3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-4-V | MAXXECUMINI-C1-D2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-4-AA | MAXXECUMINI-C1-C4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-4-P | MAXXECUMINI-C1-C1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-4-N | MAXXECUMINI-C1-C2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-3-T | MAXXECUMINI-C1-B1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-3-S | MAXXECUMINI-C1-B2 | 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 | MAXXECUMINI-C1-E2 | MAXXECUMINI-C1-A2 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 2 | MAXXECUMINI-C1-H4 | MAXXECUMINI-C1-A2 | open (OL) | +12 V supply must not touch sensor ground | |
| 3 | MAXXECUMINI-C1-H4 | MAXXECUMINI-C1-G4 | open (OL) | +12 V supply must not touch power ground | |
| 4 | MAXXECUMINI-C1-G4 | MAXXECUMINI-C1-E2 | open (OL) | power ground must not touch 5 V sensor reference | |
| 5 | MAXXECUMINI-C1-H4 | MAXXECUMINI-C1-E2 | open (OL) | +12 V supply must not touch 5 V sensor reference |
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
MAXXECUMINI-C1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | TRIGGER | — | W14 | — | 0.5 | OEM-3-Y | — | — | — |
| A2 | TRIGGER GND | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| B1 | DIN 1 (Hall only) | — | W30 | — | 0.5 | OEM-3-T | — | — | — |
| B2 | DIN 2 (Hall only) | — | W31 | — | 0.5 | OEM-3-S | — | — | — |
| B3 | SENSOR GND | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| B4 | SENSOR GND | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| C1 | CLT | — | W28 | — | 0.5 | OEM-4-P | — | — | — |
| C2 | IAT | — | W29 | — | 0.5 | OEM-4-N | — | — | — |
| C3 | AIN 3 (0-5V) | — | W25 | — | 0.5 | OEM-4-X | — | — | — |
| C4 | AIN 4 (0-5V) | — | W27 | — | 0.5 | OEM-4-AA | — | — | — |
| D1 | GPO 8/TACHO | — | W24 | — | 0.5 | OEM-2-M | — | — | — |
| D2 | TPS | — | W26 | — | 0.5 | OEM-4-V | — | — | — |
| D3 | GND Shield | — | — | — | — | — | — | — | — |
| D4 | SENSOR GND | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| E1 | GPO 3 | — | W23 | — | 0.5 | OEM-2-K | — | — | — |
| E2 | +5V sensor supply | — | W13 | — | 0.5 | OEM-4-L | — | — | — |
| E3 | CAN L | — | — | — | — | — | — | — | — |
| E4 | CAN H | — | — | — | — | — | — | — | — |
| F1 | IGN 1 | — | W15 | — | 0.5 | OEM-3-F | — | — | — |
| F2 | IGN 2 | — | W16 | — | 0.5 | OEM-3-I | — | — | — |
| F3 | IGN 3 | — | — | — | — | — | — | — | — |
| F4 | IGN 4 | — | — | — | — | — | — | — | — |
| G1 | GPO 2 | — | W22 | — | 0.5 | OEM-2-C | — | — | — |
| G2 | GPO 1 | — | W21 | — | 0.5 | OEM-2-B | — | — | — |
| G3 | INJ 1 | — | W17 | — | 0.5 | OEM-2-A | — | — | — |
| G4 | ENGINE GND | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| H1 | INJ 2 | — | W18 | — | 0.5 | OEM-2-D | — | — | — |
| H2 | INJ 3 | — | W19 | — | 0.5 | OEM-2-G | — | — | — |
| H3 | INJ 4 | — | W20 | — | 0.5 | OEM-2-J | — | — | — |
| H4 | +12V (ECU power supply) | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Injector 1 | — | W17 | — | 0.5 | MAXXECUMINI-C1-G3 | — | — | — |
| B | Cooling fan relay | — | W21 | — | 0.5 | MAXXECUMINI-C1-G2 | — | — | — |
| C | Condenser fan relay | — | W22 | — | 0.5 | MAXXECUMINI-C1-G1 | — | — | — |
| D | Injector 2 | — | W18 | — | 0.5 | MAXXECUMINI-C1-H1 | — | — | — |
| E | EGR valve | — | — | — | — | — | — | — | — |
| F | EGR valve | — | — | — | — | — | — | — | — |
| G | Injector 3 | — | W19 | — | 0.5 | MAXXECUMINI-C1-H2 | — | — | — |
| H | EGR valve | — | — | — | — | — | — | — | — |
| I | EGR valve | — | — | — | — | — | — | — | — |
| J | Injector 4 | — | W20 | — | 0.5 | MAXXECUMINI-C1-H3 | — | — | — |
| K | A/C clutch relay | — | W23 | — | 0.5 | MAXXECUMINI-C1-E1 | — | — | — |
| M | Fuel pump relay | — | W24 | — | 0.5 | MAXXECUMINI-C1-D1 | — | — | — |
| N | VTCS solenoid (intake butterflies) | — | — | — | — | — | — | — | — |
| P | ISC valve +14V feed | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| Q | ISC valve low side | — | — | — | — | — | — | — | — |
| R | Malfunction indicator lamp (MIL) | — | — | — | — | — | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| D | EGR boost solenoid | — | — | — | — | — | — | — | — |
| E | Charcoal canister purge | — | — | — | — | — | — | — | — |
| F | Ignition 1 (coils 1+4, wasted spark) | — | W15 | — | 0.5 | MAXXECUMINI-C1-F1 | — | — | — |
| H | Main relay | — | — | — | — | — | — | — | — |
| I | Ignition 2 (coils 2+3, wasted spark) | — | W16 | — | 0.5 | MAXXECUMINI-C1-F2 | — | — | — |
| J | Front O2 heater | — | — | — | — | — | — | — | — |
| M | Alternator control | — | — | — | — | — | — | — | — |
| O | Tachometer output | — | — | — | — | — | — | — | — |
| P | Rear O2 heater | — | — | — | — | — | — | — | — |
| S | Immobiliser | — | W31 | — | 0.5 | MAXXECUMINI-C1-B2 | — | — | — |
| T | Vehicle speed | — | W30 | — | 0.5 | MAXXECUMINI-C1-B1 | — | — | — |
| U | Charge lamp | — | — | — | — | — | — | — | — |
| V | Cam position (CMP) | — | — | — | — | — | — | — | — |
| Y | Crank position (CKP) | — | W14 | — | 0.5 | MAXXECUMINI-C1-A1 | — | — | — |
OEM-4
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| AA | Rear O2 signal | — | W27 | — | 0.5 | MAXXECUMINI-C1-C4 | — | — | — |
| AD | Fuel level | — | — | — | — | — | — | — | — |
| AF | ECU power +14V (main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| AG | Constant +12V | — | — | — | — | — | — | — | — |
| B | Brake switch | — | — | — | — | — | — | — | — |
| C | Power steering pressure switch | — | — | — | — | — | — | — | — |
| D | VVT oil-control solenoid | — | — | — | — | — | — | — | — |
| F | A/C request | — | — | — | — | — | — | — | — |
| H | Neutral switch | — | — | — | — | — | — | — | — |
| I | Clutch switch | — | — | — | — | — | — | — | — |
| J | VTCS vacuum switch | — | — | — | — | — | — | — | — |
| L | +5V sensor supply | — | W13 | — | 0.5 | MAXXECUMINI-C1-E2 | — | — | — |
| M | Knock sensor | — | — | — | — | — | — | — | — |
| N | Intake air temperature (IAT) | — | W29 | — | 0.5 | MAXXECUMINI-C1-C2 | — | — | — |
| O | Signal ground | — | W8 | — | 0.5 | SP-0V-1 | — | — | — |
| P | Coolant temperature (ECT) | — | W28 | — | 0.5 | MAXXECUMINI-C1-C1 | — | — | — |
| V | Throttle position (TPS) | — | W26 | — | 0.5 | MAXXECUMINI-C1-D2 | — | — | — |
| W | Front O2 signal | — | — | — | — | — | — | — | — |
| X | Mass air flow (MAF) | — | W25 | — | 0.5 | MAXXECUMINI-C1-C3 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W8 | — | 0.5 | OEM-4-O | — | — | — |
| 1 | — | — | W9 | — | 0.5 | MAXXECUMINI-C1-A2 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | MAXXECUMINI-C1-B3 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | MAXXECUMINI-C1-B4 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | MAXXECUMINI-C1-D4 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-2-P | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-4-AF | — | — | — |
| 1 | — | — | W3 | — | 0.85 | MAXXECUMINI-C1-H4 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-3-B | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-4-A | — | — | — |
| 1 | — | — | W7 | — | 0.85 | MAXXECUMINI-C1-G4 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-2-A | Injector 1 | injector_out | MAXXECUMINI-C1-G3 | INJ 1 | injector_out | single_source | |
| OEM-2-B | Cooling fan relay | low_side_out | MAXXECUMINI-C1-G2 | GPO 1 | low_side_out | single_source | |
| OEM-2-C | Condenser fan relay | low_side_out | MAXXECUMINI-C1-G1 | GPO 2 | low_side_out | single_source | |
| OEM-2-D | Injector 2 | injector_out | MAXXECUMINI-C1-H1 | INJ 2 | injector_out | single_source | |
| OEM-2-E | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-2-F | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-2-G | Injector 3 | injector_out | MAXXECUMINI-C1-H2 | INJ 3 | injector_out | single_source | |
| OEM-2-H | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-2-I | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-2-J | Injector 4 | injector_out | MAXXECUMINI-C1-H3 | INJ 4 | injector_out | single_source | |
| OEM-2-K | A/C clutch relay | low_side_out | MAXXECUMINI-C1-E1 | GPO 3 | low_side_out | single_source | |
| OEM-2-M | Fuel pump relay | low_side_out | MAXXECUMINI-C1-D1 | GPO 8/TACHO | low_side_out | single_source | |
| OEM-2-N | VTCS solenoid (intake butterflies) | low_side_out | — | — | — | single_source | |
| OEM-2-P | ISC valve +14V feed | power_in | MAXXECUMINI-C1-H4 | +12V (ECU power supply) | power_in | single_source | |
| OEM-2-Q | ISC valve low side | low_side_out | — | — | — | single_source | |
| OEM-2-R | Malfunction indicator lamp (MIL) | low_side_out | — | — | — | single_source | |
| OEM-3-A | Power ground | ground | MAXXECUMINI-C1-G4 | ENGINE GND | ground | single_source | |
| OEM-3-B | Power ground | ground | MAXXECUMINI-C1-G4 | ENGINE GND | ground | single_source | |
| OEM-3-D | EGR boost solenoid | low_side_out | — | — | — | single_source | |
| OEM-3-E | Charcoal canister purge | low_side_out | — | — | — | single_source | |
| OEM-3-F | Ignition 1 (coils 1+4, wasted spark) | ignition_out | MAXXECUMINI-C1-F1 | IGN 1 | ignition_out | single_source | |
| OEM-3-H | Main relay | low_side_out | — | — | — | single_source | |
| OEM-3-I | Ignition 2 (coils 2+3, wasted spark) | ignition_out | MAXXECUMINI-C1-F2 | IGN 2 | ignition_out | single_source | |
| OEM-3-J | Front O2 heater | low_side_out | — | — | — | single_source | |
| OEM-3-M | Alternator control | low_side_out | — | — | — | single_source | |
| OEM-3-O | Tachometer output | tacho_out | — | — | — | single_source | |
| OEM-3-P | Rear O2 heater | low_side_out | — | — | — | single_source | |
| OEM-3-S | Immobiliser | digital_in | MAXXECUMINI-C1-B2 | DIN 2 (Hall only) | digital_in | single_source | |
| OEM-3-T | Vehicle speed | digital_in | MAXXECUMINI-C1-B1 | DIN 1 (Hall only) | digital_in | single_source | |
| OEM-3-U | Charge lamp | low_side_out | — | — | — | single_source | |
| OEM-3-V | Cam position (CMP) | trigger_in | — | — | — | single_source | |
| OEM-3-Y | Crank position (CKP) | trigger_in | MAXXECUMINI-C1-A1 | TRIGGER | trigger_in | single_source | |
| OEM-4-A | Power ground | ground | MAXXECUMINI-C1-G4 | ENGINE GND | ground | single_source | |
| OEM-4-AA | Rear O2 signal | lambda_nb_in | MAXXECUMINI-C1-C4 | AIN 4 (0-5V) | analog_in | single_source | |
| OEM-4-AD | Fuel level | analog_in | — | — | — | single_source | |
| OEM-4-AF | ECU power +14V (main relay) | power_in | MAXXECUMINI-C1-H4 | +12V (ECU power supply) | power_in | single_source | |
| OEM-4-AG | Constant +12V | power_in | — | — | — | single_source | |
| OEM-4-B | Brake switch | digital_in | — | — | — | single_source | |
| OEM-4-C | Power steering pressure switch | digital_in | — | — | — | single_source | |
| OEM-4-D | VVT oil-control solenoid | low_side_out | — | — | — | single_source | |
| OEM-4-F | A/C request | digital_in | — | — | — | single_source | |
| OEM-4-H | Neutral switch | digital_in | — | — | — | single_source | |
| OEM-4-I | Clutch switch | digital_in | — | — | — | single_source | |
| OEM-4-J | VTCS vacuum switch | digital_in | — | — | — | single_source | |
| OEM-4-L | +5V sensor supply | vref | MAXXECUMINI-C1-E2 | +5V sensor supply | vref | single_source | |
| OEM-4-M | Knock sensor | knock_in | — | — | — | single_source | |
| OEM-4-N | Intake air temperature (IAT) | temp_in | MAXXECUMINI-C1-C2 | IAT | temp_in | single_source | |
| OEM-4-O | Signal ground | sensor_ground | MAXXECUMINI-C1-A2 + MAXXECUMINI-C1-B3 + MAXXECUMINI-C1-B4 + MAXXECUMINI-C1-D4 | TRIGGER GND + SENSOR GND + SENSOR GND + SENSOR GND | sensor_ground | single_source | |
| OEM-4-P | Coolant temperature (ECT) | temp_in | MAXXECUMINI-C1-C1 | CLT | temp_in | single_source | |
| OEM-4-V | Throttle position (TPS) | analog_in | MAXXECUMINI-C1-D2 | TPS | analog_in | single_source | |
| OEM-4-W | Front O2 signal | lambda_nb_in | — | — | — | single_source | |
| OEM-4-X | Mass air flow (MAF) | analog_in | MAXXECUMINI-C1-C3 | AIN 3 (0-5V) | analog_in | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-2-P | SP-14V-1 | 0.85 | no route | ISC valve +14V feed | — | |
| W2 | OEM-4-AF | SP-14V-1 | 0.85 | no route | ECU power +14V (main relay) | — | |
| W3 | SP-14V-1 | MAXXECUMINI-C1-H4 | 0.85 | no route | +12V (ECU power supply) | — | |
| W4 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W5 | OEM-3-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-4-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | SP-GND-1 | MAXXECUMINI-C1-G4 | 0.85 | no route | ENGINE GND | — | |
| W8 | OEM-4-O | SP-0V-1 | 0.5 | no route | Signal ground | — | |
| W9 | SP-0V-1 | MAXXECUMINI-C1-A2 | 0.5 | no route | TRIGGER GND | — | |
| W10 | SP-0V-1 | MAXXECUMINI-C1-B3 | 0.5 | no route | SENSOR GND | — | |
| W11 | SP-0V-1 | MAXXECUMINI-C1-B4 | 0.5 | no route | SENSOR GND | — | |
| W12 | SP-0V-1 | MAXXECUMINI-C1-D4 | 0.5 | no route | SENSOR GND | — | |
| W13 | OEM-4-L | MAXXECUMINI-C1-E2 | 0.5 | no route | +5V sensor supply | — | |
| W14 | OEM-3-Y | MAXXECUMINI-C1-A1 | 0.5 | no route | Crank position (CKP) | — | |
| W15 | OEM-3-F | MAXXECUMINI-C1-F1 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W16 | OEM-3-I | MAXXECUMINI-C1-F2 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W17 | OEM-2-A | MAXXECUMINI-C1-G3 | 0.5 | no route | Injector 1 | — | |
| W18 | OEM-2-D | MAXXECUMINI-C1-H1 | 0.5 | no route | Injector 2 | — | |
| W19 | OEM-2-G | MAXXECUMINI-C1-H2 | 0.5 | no route | Injector 3 | — | |
| W20 | OEM-2-J | MAXXECUMINI-C1-H3 | 0.5 | no route | Injector 4 | — | |
| W21 | OEM-2-B | MAXXECUMINI-C1-G2 | 0.5 | no route | Cooling fan relay | — | |
| W22 | OEM-2-C | MAXXECUMINI-C1-G1 | 0.5 | no route | Condenser fan relay | — | |
| W23 | OEM-2-K | MAXXECUMINI-C1-E1 | 0.5 | no route | A/C clutch relay | — | |
| W24 | OEM-2-M | MAXXECUMINI-C1-D1 | 0.5 | no route | Fuel pump relay | — | |
| W25 | OEM-4-X | MAXXECUMINI-C1-C3 | 0.5 | no route | Mass air flow (MAF) | — | |
| W26 | OEM-4-V | MAXXECUMINI-C1-D2 | 0.5 | no route | Throttle position (TPS) | — | |
| W27 | OEM-4-AA | MAXXECUMINI-C1-C4 | 0.5 | no route | Rear O2 signal | — | |
| W28 | OEM-4-P | MAXXECUMINI-C1-C1 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W29 | OEM-4-N | MAXXECUMINI-C1-C2 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W30 | OEM-3-T | MAXXECUMINI-C1-B1 | 0.5 | no route | Vehicle speed | — | |
| W31 | OEM-3-S | MAXXECUMINI-C1-B2 | 0.5 | no route | Immobiliser | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (6)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | REQUIRED_UNMAPPED | OEM-3-V | Required OEM function "Cam position (CMP)" (trigger_in) is not connected to the new ECU. |
| warn | LOAD_UNKNOWN | MAXXECUMINI-C1-D1 | MAXXECUMINI-C1-D1 "GPO 8/TACHO" drives OEM-2-M Fuel pump relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | MAXXECUMINI-C1-E1 | MAXXECUMINI-C1-E1 "GPO 3" drives OEM-2-K A/C clutch relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | MAXXECUMINI-C1-G1 | MAXXECUMINI-C1-G1 "GPO 2" drives OEM-2-C Condenser fan relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | MAXXECUMINI-C1-G2 | MAXXECUMINI-C1-G2 "GPO 1" drives OEM-2-B Cooling fan relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| info | UNMAPPED | OEM | 25 optional OEM pins are not mapped: OEM-2-E EGR valve; OEM-2-F EGR valve; OEM-2-H EGR valve; OEM-2-I EGR valve; OEM-2-N VTCS solenoid (intake butterflies); OEM-2-Q ISC valve low side; OEM-2-R Malfunction indicator lamp (MIL); OEM-3-D EGR boost solenoid; OEM-3-E Charcoal canister purge; OEM-3-H Main relay; OEM-3-J Front O2 heater; OEM-3-M Alternator control; OEM-3-O Tachometer output; OEM-3-P Rear O2 heater; OEM-3-U Charge lamp; OEM-4-AD Fuel level; OEM-4-B Brake switch; OEM-4-C Power steering pressure switch; OEM-4-D VVT oil-control solenoid; OEM-4-F A/C request; OEM-4-H Neutral switch; OEM-4-I Clutch switch; OEM-4-J VTCS vacuum switch; OEM-4-M Knock sensor; OEM-4-W Front O2 signal |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-4-AG | Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed. | mapping-proposal |
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-06. Review every wire against both manuals before building. Open items: - OEM-3 V: Cam position (CMP): no free cam_hall/cam_vr/frequency_in input on MaxxECU MaxxECU MINI Not wired: - OEM-4 AG: Constant +12V: MaxxECU MaxxECU MINI has no battery-constant input; not needed - OEM-4 M: Knock sensor: no free knock input on MaxxECU MaxxECU MINI - OEM-3 H: Main relay: no free relay_control/low_side/ls_hs/injector/hbridge rated ≥ 0.2 A on MaxxECU MaxxECU MINI - OEM-3 J: Front O2 heater: no free heater_low_side/low_side/ls_hs/hbridge on MaxxECU MaxxECU MINI - OEM-3 P: Rear O2 heater: no free heater_low_side/low_side/ls_hs/hbridge on MaxxECU MaxxECU MINI - OEM-2 Q: ISC valve low side: no free low_side/ls_hs/injector/hbridge rated ≥ 1.0 A on MaxxECU MaxxECU MINI - OEM-2 E: EGR valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-2 F: EGR valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-2 H: EGR valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-2 I: EGR valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-2 N: VTCS solenoid (intake butterflies): no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-2 R: Malfunction indicator lamp (MIL): no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-3 D: EGR boost solenoid: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-3 E: Charcoal canister purge: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-3 M: Alternator control: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-3 U: Charge lamp: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-4 D: VVT oil-control solenoid: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-3 O: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on MaxxECU MaxxECU MINI - OEM-4 W: Front O2 signal: no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU MINI - OEM-4 AD: Fuel level: no free analog_0_5 on MaxxECU MaxxECU MINI - OEM-4 B: Brake switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU MINI - OEM-4 C: Power steering pressure switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU MINI - OEM-4 F: A/C request: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU MINI - OEM-4 H: Neutral switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU MINI - OEM-4 I: Clutch switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU MINI - OEM-4 J: VTCS vacuum switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU MINI
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | Link G4X MX5NB2X install manual (NB2 2001-05) | https://linkecu.com/documentation/MX5XNB2.pdf | archive | 2026-10-05 | 741efdd9f2c8 |
| 4 | vendor_doc | MaxxECU GEN1 pinout (MINI / STREET / SPORT / V1 / RACE / PRO) | http://www.maxxecu.com/webhelp/wirings-maxxecu_pinout.html | archive | 2026-10-05 | 2e37b6814690 |