Mazda RX-7 FC 1986-92 (13B-T Turbo II) → MaxxECU MaxxECU MINI REV10+ (auto)
Mazda RX-7 FC 1986-92 (13B-T Turbo II) — 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 | 33 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-3-I | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | SP-14V-1 | MAXXECUMINI-C1-H4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-2-R | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-3-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-3-G | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | SP-GND-1 | MAXXECUMINI-C1-G4 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-1-P | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-1-Q | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-2-C | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-0V-1 | MAXXECUMINI-C1-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-0V-1 | MAXXECUMINI-C1-B3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-0V-1 | MAXXECUMINI-C1-B4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | MAXXECUMINI-C1-D4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-2-A | MAXXECUMINI-C1-E2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-1-T | MAXXECUMINI-C1-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-1-U | MAXXECUMINI-C1-F1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-1-V | MAXXECUMINI-C1-F2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-1-X | MAXXECUMINI-C1-F3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-3-E | MAXXECUMINI-C1-G3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-3-H | MAXXECUMINI-C1-H1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-3-C | MAXXECUMINI-C1-H2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-3-F | MAXXECUMINI-C1-H3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-1-F | MAXXECUMINI-C1-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-3-D | MAXXECUMINI-C1-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-1-C | MAXXECUMINI-C1-E1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-1-S | MAXXECUMINI-C1-D1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-2-E | MAXXECUMINI-C1-C3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-2-B | MAXXECUMINI-C1-C4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-2-G | MAXXECUMINI-C1-D2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-2-I | MAXXECUMINI-C1-C1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-2-J | MAXXECUMINI-C1-C2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-1-O | MAXXECUMINI-C1-B1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-1-E | 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-G4 | open (OL) | 5 V sensor reference must not touch power ground | |
| 2 | MAXXECUMINI-C1-A2 | MAXXECUMINI-C1-E2 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 3 | MAXXECUMINI-C1-A2 | MAXXECUMINI-C1-H4 | open (OL) | sensor ground must not touch +12 V supply | |
| 4 | MAXXECUMINI-C1-E2 | MAXXECUMINI-C1-H4 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 5 | MAXXECUMINI-C1-G4 | MAXXECUMINI-C1-H4 | open (OL) | power ground must not touch +12 V supply |
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 | — | W15 | — | 0.5 | OEM-1-T | — | — | — |
| A2 | TRIGGER GND | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| B1 | DIN 1 (Hall only) | — | W32 | — | 0.5 | OEM-1-O | — | — | — |
| B2 | DIN 2 (Hall only) | — | W33 | — | 0.5 | OEM-1-E | — | — | — |
| B3 | SENSOR GND | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| B4 | SENSOR GND | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| C1 | CLT | — | W30 | — | 0.5 | OEM-2-I | — | — | — |
| C2 | IAT | — | W31 | — | 0.5 | OEM-2-J | — | — | — |
| C3 | AIN 3 (0-5V) | — | W27 | — | 0.5 | OEM-2-E | — | — | — |
| C4 | AIN 4 (0-5V) | — | W28 | — | 0.5 | OEM-2-B | — | — | — |
| D1 | GPO 8/TACHO | — | W26 | — | 0.5 | OEM-1-S | — | — | — |
| D2 | TPS | — | W29 | — | 0.5 | OEM-2-G | — | — | — |
| D3 | GND Shield | — | — | — | — | — | — | — | — |
| D4 | SENSOR GND | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| E1 | GPO 3 | — | W25 | — | 0.5 | OEM-1-C | — | — | — |
| E2 | +5V sensor supply | — | W14 | — | 0.5 | OEM-2-A | — | — | — |
| E3 | CAN L | — | — | — | — | — | — | — | — |
| E4 | CAN H | — | — | — | — | — | — | — | — |
| F1 | IGN 1 | — | W16 | — | 0.5 | OEM-1-U | — | — | — |
| F2 | IGN 2 | — | W17 | — | 0.5 | OEM-1-V | — | — | — |
| F3 | IGN 3 | — | W18 | — | 0.5 | OEM-1-X | — | — | — |
| F4 | IGN 4 | — | — | — | — | — | — | — | — |
| G1 | GPO 2 | — | W24 | — | 0.5 | OEM-3-D | — | — | — |
| G2 | GPO 1 | — | W23 | — | 0.5 | OEM-1-F | — | — | — |
| G3 | INJ 1 | — | W19 | — | 0.5 | OEM-3-E | — | — | — |
| G4 | ENGINE GND | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| H1 | INJ 2 | — | W20 | — | 0.5 | OEM-3-H | — | — | — |
| H2 | INJ 3 | — | W21 | — | 0.5 | OEM-3-C | — | — | — |
| H3 | INJ 4 | — | W22 | — | 0.5 | OEM-3-F | — | — | — |
| H4 | +12V (ECU power supply) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| C | Air bypass solenoid | — | W25 | — | 0.5 | MAXXECUMINI-C1-E1 | — | — | — |
| E | A/C request | — | W33 | — | 0.5 | MAXXECUMINI-C1-B2 | — | — | — |
| F | A/C clutch relay | — | W23 | — | 0.5 | MAXXECUMINI-C1-G2 | — | — | — |
| G | Neutral switch | — | — | — | — | — | — | — | — |
| H | Water temperature switch | — | — | — | — | — | — | — | — |
| L | Clutch switch | — | — | — | — | — | — | — | — |
| M | Ignition feedback (tacho) | — | — | — | — | — | — | — | — |
| N | CAS 2-tooth (G, cam) | — | — | — | — | — | — | — | — |
| O | Vehicle speed (mileage sensor) | — | W32 | — | 0.5 | MAXXECUMINI-C1-B1 | — | — | — |
| P | CAS ground | — | W7 | — | 0.5 | SP-0V-1 | — | — | — |
| Q | CAS ground | — | W8 | — | 0.5 | SP-0V-1 | — | — | — |
| R | Knock input | — | — | — | — | — | — | — | — |
| S | Port air valve | — | W26 | — | 0.5 | MAXXECUMINI-C1-D1 | — | — | — |
| T | CAS 24-tooth (NE, crank) | — | W15 | — | 0.5 | MAXXECUMINI-C1-A1 | — | — | — |
| U | Ignition select (trailing rotor) | — | W16 | — | 0.5 | MAXXECUMINI-C1-F1 | — | — | — |
| V | Ignition leading | — | W17 | — | 0.5 | MAXXECUMINI-C1-F2 | — | — | — |
| X | Ignition trailing | — | W18 | — | 0.5 | MAXXECUMINI-C1-F3 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | 5V sensor supply | — | W14 | — | 0.5 | MAXXECUMINI-C1-E2 | — | — | — |
| B | MAP (pressure) signal | — | W28 | — | 0.5 | MAXXECUMINI-C1-C4 | — | — | — |
| C | Sensor ground | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| D | O2 sensor signal | — | — | — | — | — | — | — | — |
| E | Airflow signal (AFM) | — | W27 | — | 0.5 | MAXXECUMINI-C1-C3 | — | — | — |
| F | Variable resistor (tuning) | — | — | — | — | — | — | — | — |
| G | Throttle position (TPS) | — | W29 | — | 0.5 | MAXXECUMINI-C1-D2 | — | — | — |
| H | Atmospheric pressure (ATP) | — | — | — | — | — | — | — | — |
| I | Coolant temperature (ECT) | — | W30 | — | 0.5 | MAXXECUMINI-C1-C1 | — | — | — |
| J | Inlet air temperature (IAT) | — | W31 | — | 0.5 | MAXXECUMINI-C1-C2 | — | — | — |
| K | Turbo control valve (boost) | — | — | — | — | — | — | — | — |
| L | Manifold air temperature (MAT) | — | — | — | — | — | — | — | — |
| M | Pressure regulator control valve | — | — | — | — | — | — | — | — |
| N | EGR valve | — | — | — | — | — | — | — | — |
| O | Switching valve | — | — | — | — | — | — | — | — |
| P | Relief valve | — | — | — | — | — | — | — | — |
| Q | Idle control (BAC) | — | — | — | — | — | — | — | — |
| R | Power ground | — | W3 | — | 0.85 | SP-GND-1 | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Starter input | — | — | — | — | — | — | — | — |
| C | Primary injector 2 | — | W21 | — | 0.5 | MAXXECUMINI-C1-H2 | — | — | — |
| D | Starter inhibit / fuel pump control | — | W24 | — | 0.5 | MAXXECUMINI-C1-G1 | — | — | — |
| E | Primary injector 1 | — | W19 | — | 0.5 | MAXXECUMINI-C1-G3 | — | — | — |
| F | Secondary injector 2 | — | W22 | — | 0.5 | MAXXECUMINI-C1-H3 | — | — | — |
| G | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| H | Secondary injector 1 | — | W20 | — | 0.5 | MAXXECUMINI-C1-H1 | — | — | — |
| I | Ignition power (+12V via main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| J | Battery constant (+12V) | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W7 | — | 0.5 | OEM-1-P | — | — | — |
| 1 | — | — | W8 | — | 0.5 | OEM-1-Q | — | — | — |
| 1 | — | — | W9 | — | 0.5 | OEM-2-C | — | — | — |
| 1 | — | — | W10 | — | 0.5 | MAXXECUMINI-C1-A2 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | MAXXECUMINI-C1-B3 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | MAXXECUMINI-C1-B4 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | MAXXECUMINI-C1-D4 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-3-I | — | — | — |
| 1 | — | — | W2 | — | 0.85 | MAXXECUMINI-C1-H4 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W3 | — | 0.85 | OEM-2-R | — | — | — |
| 1 | — | — | W4 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-3-G | — | — | — |
| 1 | — | — | W6 | — | 0.85 | MAXXECUMINI-C1-G4 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-1-C | Air bypass solenoid | low_side_out | MAXXECUMINI-C1-E1 | GPO 3 | low_side_out | single_source | |
| OEM-1-E | A/C request | digital_in | MAXXECUMINI-C1-B2 | DIN 2 (Hall only) | digital_in | single_source | |
| OEM-1-F | A/C clutch relay | low_side_out | MAXXECUMINI-C1-G2 | GPO 1 | low_side_out | single_source | |
| OEM-1-G | Neutral switch | digital_in | — | — | — | corroborated | |
| OEM-1-H | Water temperature switch | digital_in | — | — | — | corroborated | |
| OEM-1-L | Clutch switch | digital_in | — | — | — | single_source | |
| OEM-1-M | Ignition feedback (tacho) | tacho_out | — | — | — | single_source | |
| OEM-1-N | CAS 2-tooth (G, cam) | trigger_in | — | — | — | corroborated | |
| OEM-1-O | Vehicle speed (mileage sensor) | digital_in | MAXXECUMINI-C1-B1 | DIN 1 (Hall only) | digital_in | single_source | |
| OEM-1-P | CAS 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 | corroborated | |
| OEM-1-Q | CAS 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 | corroborated | |
| OEM-1-R | Knock input | knock_in | — | — | — | corroborated | |
| OEM-1-S | Port air valve | low_side_out | MAXXECUMINI-C1-D1 | GPO 8/TACHO | low_side_out | single_source | |
| OEM-1-T | CAS 24-tooth (NE, crank) | trigger_in | MAXXECUMINI-C1-A1 | TRIGGER | trigger_in | corroborated | |
| OEM-1-U | Ignition select (trailing rotor) | ignition_out | MAXXECUMINI-C1-F1 | IGN 1 | ignition_out | corroborated | |
| OEM-1-V | Ignition leading | ignition_out | MAXXECUMINI-C1-F2 | IGN 2 | ignition_out | corroborated | |
| OEM-1-X | Ignition trailing | ignition_out | MAXXECUMINI-C1-F3 | IGN 3 | ignition_out | single_source | |
| OEM-2-A | 5V sensor supply | vref | MAXXECUMINI-C1-E2 | +5V sensor supply | vref | single_source | |
| OEM-2-B | MAP (pressure) signal | analog_in | MAXXECUMINI-C1-C4 | AIN 4 (0-5V) | analog_in | single_source | |
| OEM-2-C | Sensor 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-2-D | O2 sensor signal | lambda_nb_in | — | — | — | single_source | |
| OEM-2-E | Airflow signal (AFM) | analog_in | MAXXECUMINI-C1-C3 | AIN 3 (0-5V) | analog_in | single_source | |
| OEM-2-F | Variable resistor (tuning) | analog_in | — | — | — | single_source | |
| OEM-2-G | Throttle position (TPS) | analog_in | MAXXECUMINI-C1-D2 | TPS | analog_in | single_source | |
| OEM-2-H | Atmospheric pressure (ATP) | analog_in | — | — | — | single_source | |
| OEM-2-I | Coolant temperature (ECT) | temp_in | MAXXECUMINI-C1-C1 | CLT | temp_in | single_source | |
| OEM-2-J | Inlet air temperature (IAT) | temp_in | MAXXECUMINI-C1-C2 | IAT | temp_in | single_source | |
| OEM-2-K | Turbo control valve (boost) | low_side_out | — | — | — | single_source | |
| OEM-2-L | Manifold air temperature (MAT) | temp_in | — | — | — | single_source | |
| OEM-2-M | Pressure regulator control valve | low_side_out | — | — | — | single_source | |
| OEM-2-N | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-2-O | Switching valve | low_side_out | — | — | — | single_source | |
| OEM-2-P | Relief valve | low_side_out | — | — | — | single_source | |
| OEM-2-Q | Idle control (BAC) | low_side_out | — | — | — | single_source | |
| OEM-2-R | Power ground | ground | MAXXECUMINI-C1-G4 | ENGINE GND | ground | single_source | |
| OEM-3-A | Power ground | ground | MAXXECUMINI-C1-G4 | ENGINE GND | ground | single_source | |
| OEM-3-B | Starter input | digital_in | — | — | — | single_source | |
| OEM-3-C | Primary injector 2 | injector_out | MAXXECUMINI-C1-H2 | INJ 3 | injector_out | single_source | |
| OEM-3-D | Starter inhibit / fuel pump control | low_side_out | MAXXECUMINI-C1-G1 | GPO 2 | low_side_out | single_source | |
| OEM-3-E | Primary injector 1 | injector_out | MAXXECUMINI-C1-G3 | INJ 1 | injector_out | single_source | |
| OEM-3-F | Secondary injector 2 | injector_out | MAXXECUMINI-C1-H3 | INJ 4 | injector_out | single_source | |
| OEM-3-G | Power ground | ground | MAXXECUMINI-C1-G4 | ENGINE GND | ground | single_source | |
| OEM-3-H | Secondary injector 1 | injector_out | MAXXECUMINI-C1-H1 | INJ 2 | injector_out | single_source | |
| OEM-3-I | Ignition power (+12V via main relay) | power_in | MAXXECUMINI-C1-H4 | +12V (ECU power supply) | power_in | single_source | |
| OEM-3-J | Battery constant (+12V) | power_in | — | — | — | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-3-I | SP-14V-1 | 0.85 | no route | Ignition power (+12V via main relay) | — | |
| W2 | SP-14V-1 | MAXXECUMINI-C1-H4 | 0.85 | no route | +12V (ECU power supply) | — | |
| W3 | OEM-2-R | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W4 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W5 | OEM-3-G | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | SP-GND-1 | MAXXECUMINI-C1-G4 | 0.85 | no route | ENGINE GND | — | |
| W7 | OEM-1-P | SP-0V-1 | 0.5 | no route | CAS ground | — | |
| W8 | OEM-1-Q | SP-0V-1 | 0.5 | no route | CAS ground | — | |
| W9 | OEM-2-C | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W10 | SP-0V-1 | MAXXECUMINI-C1-A2 | 0.5 | no route | TRIGGER GND | — | |
| W11 | SP-0V-1 | MAXXECUMINI-C1-B3 | 0.5 | no route | SENSOR GND | — | |
| W12 | SP-0V-1 | MAXXECUMINI-C1-B4 | 0.5 | no route | SENSOR GND | — | |
| W13 | SP-0V-1 | MAXXECUMINI-C1-D4 | 0.5 | no route | SENSOR GND | — | |
| W14 | OEM-2-A | MAXXECUMINI-C1-E2 | 0.5 | no route | 5V sensor supply | — | |
| W15 | OEM-1-T | MAXXECUMINI-C1-A1 | 0.5 | no route | CAS 24-tooth (NE, crank) | — | |
| W16 | OEM-1-U | MAXXECUMINI-C1-F1 | 0.5 | no route | Ignition select (trailing rotor) | — | |
| W17 | OEM-1-V | MAXXECUMINI-C1-F2 | 0.5 | no route | Ignition leading | — | |
| W18 | OEM-1-X | MAXXECUMINI-C1-F3 | 0.5 | no route | Ignition trailing | — | |
| W19 | OEM-3-E | MAXXECUMINI-C1-G3 | 0.5 | no route | Primary injector 1 | — | |
| W20 | OEM-3-H | MAXXECUMINI-C1-H1 | 0.5 | no route | Secondary injector 1 | — | |
| W21 | OEM-3-C | MAXXECUMINI-C1-H2 | 0.5 | no route | Primary injector 2 | — | |
| W22 | OEM-3-F | MAXXECUMINI-C1-H3 | 0.5 | no route | Secondary injector 2 | — | |
| W23 | OEM-1-F | MAXXECUMINI-C1-G2 | 0.5 | no route | A/C clutch relay | — | |
| W24 | OEM-3-D | MAXXECUMINI-C1-G1 | 0.5 | no route | Starter inhibit / fuel pump control | — | |
| W25 | OEM-1-C | MAXXECUMINI-C1-E1 | 0.5 | no route | Air bypass solenoid | — | |
| W26 | OEM-1-S | MAXXECUMINI-C1-D1 | 0.5 | no route | Port air valve | — | |
| W27 | OEM-2-E | MAXXECUMINI-C1-C3 | 0.5 | no route | Airflow signal (AFM) | — | |
| W28 | OEM-2-B | MAXXECUMINI-C1-C4 | 0.5 | no route | MAP (pressure) signal | — | |
| W29 | OEM-2-G | MAXXECUMINI-C1-D2 | 0.5 | no route | Throttle position (TPS) | — | |
| W30 | OEM-2-I | MAXXECUMINI-C1-C1 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W31 | OEM-2-J | MAXXECUMINI-C1-C2 | 0.5 | no route | Inlet air temperature (IAT) | — | |
| W32 | OEM-1-O | MAXXECUMINI-C1-B1 | 0.5 | no route | Vehicle speed (mileage sensor) | — | |
| W33 | OEM-1-E | MAXXECUMINI-C1-B2 | 0.5 | no route | A/C request | — |
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 (3)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | REQUIRED_UNMAPPED | OEM-1-N | Required OEM function "CAS 2-tooth (G, cam)" (trigger_in) is not connected to the new ECU. |
| warn | LOAD_UNKNOWN | MAXXECUMINI-C1-G2 | MAXXECUMINI-C1-G2 "GPO 1" drives OEM-1-F A/C clutch relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| info | UNMAPPED | OEM | 16 optional OEM pins are not mapped: OEM-1-G Neutral switch; OEM-1-H Water temperature switch; OEM-1-L Clutch switch; OEM-1-M Ignition feedback (tacho); OEM-1-R Knock input; OEM-2-D O2 sensor signal; OEM-2-F Variable resistor (tuning); OEM-2-H Atmospheric pressure (ATP); OEM-2-K Turbo control valve (boost); OEM-2-L Manifold air temperature (MAT); OEM-2-M Pressure regulator control valve; OEM-2-N EGR valve; OEM-2-O Switching valve; OEM-2-P Relief valve; OEM-2-Q Idle control (BAC); OEM-3-B Starter input |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-3-J | 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-1 N: CAS 2-tooth (G, cam): no free cam_hall/cam_vr/frequency_in input on MaxxECU MaxxECU MINI Not wired: - OEM-3 J: Battery constant (+12V): MaxxECU MaxxECU MINI has no battery-constant input; not needed - OEM-1 R: Knock input: no free knock input on MaxxECU MaxxECU MINI - OEM-2 K: Turbo control valve (boost): no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-2 M: Pressure regulator control valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-2 N: EGR valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-2 O: Switching valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-2 P: Relief valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-2 Q: Idle control (BAC): no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU MINI - OEM-1 M: Ignition feedback (tacho): no free tacho/frequency_out/low_side/ls_hs on MaxxECU MaxxECU MINI - OEM-2 D: O2 sensor signal: no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU MINI - OEM-2 L: Manifold air temperature (MAT): no free thermistor/analog_0_5 on MaxxECU MaxxECU MINI - OEM-2 F: Variable resistor (tuning): no free analog_0_5 on MaxxECU MaxxECU MINI - OEM-2 H: Atmospheric pressure (ATP): no free analog_0_5 on MaxxECU MaxxECU MINI - OEM-1 G: Neutral switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU MINI - OEM-1 H: Water temperature switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU MINI - OEM-1 L: Clutch switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU MINI - OEM-3 B: Starter input: 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 | Adaptronic: Select RX7 Series 4 FC Turbo plug-in pinout | https://www.rx7club.com/attachments/adaptronic-engine-mgmt-aus-311/543323d1411579751-need-pin-out-diagram-s5-pnp-rx7_s4_sel_pinout.pdf | — | — | — |
| 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 |
| 2 | forum | MSExtra: FC3S CAS wiring (NE/G) | https://www.msextra.com/forums/viewtopic.php?p=279694 | — | — | — |
| 2 | forum | NoPistons: S4 Turbo II main harness wiring (ECU plug, colours only) | https://www.nopistons.com/1st-generation-specific-16/thinking-putting-89-13bt-sa22-66354/page2/ | — | — | — |