Mazda RX-7 FC 1986-92 (13B-T Turbo II) → MaxxECU MaxxECU STREET REV9+ (auto)
Mazda RX-7 FC 1986-92 (13B-T Turbo II) — MaxxECU — MaxxECU STREET
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-08
Before you start
| Status | proposal · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | none |
| Size of the job | 35 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 | MAXXECUSTREE-C1-M4 | 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 | MAXXECUSTREE-C1-L4 | 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 | MAXXECUSTREE-C1-H1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-0V-1 | MAXXECUSTREE-C1-H2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-2-A | MAXXECUSTREE-C1-G1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-1-T | MAXXECUSTREE-C1-H3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-1-N | MAXXECUSTREE-C1-H4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-1-U | MAXXECUSTREE-C1-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-1-V | MAXXECUSTREE-C1-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-1-X | MAXXECUSTREE-C1-B2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-3-E | MAXXECUSTREE-C1-K1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-3-H | MAXXECUSTREE-C1-K2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-3-C | MAXXECUSTREE-C1-M1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-3-F | MAXXECUSTREE-C1-M2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-1-F | MAXXECUSTREE-C1-B4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-3-D | MAXXECUSTREE-C1-C4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-1-C | MAXXECUSTREE-C1-D4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-1-S | MAXXECUSTREE-C1-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-2-K | MAXXECUSTREE-C1-M3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-2-M | MAXXECUSTREE-C1-L3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-2-E | MAXXECUSTREE-C1-J3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-2-B | MAXXECUSTREE-C1-J4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-2-G | MAXXECUSTREE-C1-G2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-2-I | MAXXECUSTREE-C1-J1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-2-J | MAXXECUSTREE-C1-J2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-2-L | MAXXECUSTREE-C1-F1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-1-O | MAXXECUSTREE-C1-K3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-1-E | MAXXECUSTREE-C1-K4 | 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 | MAXXECUSTREE-C1-G1 | MAXXECUSTREE-C1-L4 | open (OL) | 5 V sensor reference must not touch power ground | |
| 2 | MAXXECUSTREE-C1-G1 | MAXXECUSTREE-C1-M4 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 3 | MAXXECUSTREE-C1-H1 | MAXXECUSTREE-C1-G1 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 4 | MAXXECUSTREE-C1-H1 | MAXXECUSTREE-C1-M4 | open (OL) | sensor ground must not touch +12 V supply | |
| 5 | MAXXECUSTREE-C1-L4 | MAXXECUSTREE-C1-M4 | open (OL) | power ground must not touch +12 V supply |
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
MAXXECUSTREE-C1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A2 | IGN 1 | — | W15 | — | 0.5 | OEM-1-U | — | — | — |
| A3 | IGN 2 | — | W16 | — | 0.5 | OEM-1-V | — | — | — |
| A4 | GPO 8/TACHO | — | W25 | — | 0.5 | OEM-1-S | — | — | — |
| B2 | IGN 3 | — | W17 | — | 0.5 | OEM-1-X | — | — | — |
| B3 | IGN 4 | — | — | — | — | — | — | — | — |
| B4 | GPO 1 | — | W22 | — | 0.5 | OEM-1-F | — | — | — |
| C2 | IGN 5 | — | — | — | — | — | — | — | — |
| C3 | IGN 6 | — | — | — | — | — | — | — | — |
| C4 | GPO 2 | — | W23 | — | 0.5 | OEM-3-D | — | — | — |
| D1 | WBO2 Heater- | — | — | — | — | — | — | — | — |
| D4 | GPO 3 | — | W24 | — | 0.5 | OEM-1-C | — | — | — |
| E1 | CAN H | — | — | — | — | — | — | — | — |
| E2 | CAN L | — | — | — | — | — | — | — | — |
| E3 | GND Shield | — | — | — | — | — | — | — | — |
| F1 | CLT | — | W33 | — | 0.5 | OEM-2-L | — | — | — |
| F2 | IAT | — | — | — | — | — | — | — | — |
| F3 | WBO2 VREF | — | — | — | — | — | — | — | — |
| F4 | WBO2 VS | — | — | — | — | — | — | — | — |
| G1 | +5V sensor supply | — | W12 | — | 0.5 | OEM-2-A | — | — | — |
| G2 | TPS/AIN | — | W30 | — | 0.5 | OEM-2-G | — | — | — |
| G3 | WBO2 IP | — | — | — | — | — | — | — | — |
| G4 | WBO2 RCAL | — | — | — | — | — | — | — | — |
| H1 | Sensor GND | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| H2 | Trigger GND | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| H3 | TRIGGER | — | W13 | — | 0.5 | OEM-1-T | — | — | — |
| H4 | HOME | — | W14 | — | 0.5 | OEM-1-N | — | — | — |
| J1 | AIN 1 (temperature) | — | W31 | — | 0.5 | OEM-2-I | — | — | — |
| J2 | AIN 2 (Temperature) | — | W32 | — | 0.5 | OEM-2-J | — | — | — |
| J3 | AIN 3 (0-5V) | — | W28 | — | 0.5 | OEM-2-E | — | — | — |
| J4 | AIN 4 (0-5V) | — | W29 | — | 0.5 | OEM-2-B | — | — | — |
| K1 | INJ 1 | — | W18 | — | 0.5 | OEM-3-E | — | — | — |
| K2 | INJ 2 | — | W19 | — | 0.5 | OEM-3-H | — | — | — |
| K3 | DIN 1 | — | W34 | — | 0.5 | OEM-1-O | — | — | — |
| K4 | DIN 2 | — | W35 | — | 0.5 | OEM-1-E | — | — | — |
| L3 | INJ 6 | — | W27 | — | 0.5 | OEM-2-M | — | — | — |
| L4 | Engine GND | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| M1 | INJ 3 | — | W20 | — | 0.5 | OEM-3-C | — | — | — |
| M2 | INJ 4 | — | W21 | — | 0.5 | OEM-3-F | — | — | — |
| M3 | INJ 5 | — | W26 | — | 0.5 | OEM-2-K | — | — | — |
| M4 | +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 | — | W24 | — | 0.5 | MAXXECUSTREE-C1-D4 | — | — | — |
| E | A/C request | — | W35 | — | 0.5 | MAXXECUSTREE-C1-K4 | — | — | — |
| F | A/C clutch relay | — | W22 | — | 0.5 | MAXXECUSTREE-C1-B4 | — | — | — |
| G | Neutral switch | — | — | — | — | — | — | — | — |
| H | Water temperature switch | — | — | — | — | — | — | — | — |
| L | Clutch switch | — | — | — | — | — | — | — | — |
| M | Ignition feedback (tacho) | — | — | — | — | — | — | — | — |
| N | CAS 2-tooth (G, cam) | — | W14 | — | 0.5 | MAXXECUSTREE-C1-H4 | — | — | — |
| O | Vehicle speed (mileage sensor) | — | W34 | — | 0.5 | MAXXECUSTREE-C1-K3 | — | — | — |
| 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 | — | W25 | — | 0.5 | MAXXECUSTREE-C1-A4 | — | — | — |
| T | CAS 24-tooth (NE, crank) | — | W13 | — | 0.5 | MAXXECUSTREE-C1-H3 | — | — | — |
| U | Ignition select (trailing rotor) | — | W15 | — | 0.5 | MAXXECUSTREE-C1-A2 | — | — | — |
| V | Ignition leading | — | W16 | — | 0.5 | MAXXECUSTREE-C1-A3 | — | — | — |
| X | Ignition trailing | — | W17 | — | 0.5 | MAXXECUSTREE-C1-B2 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | 5V sensor supply | — | W12 | — | 0.5 | MAXXECUSTREE-C1-G1 | — | — | — |
| B | MAP (pressure) signal | — | W29 | — | 0.5 | MAXXECUSTREE-C1-J4 | — | — | — |
| C | Sensor ground | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| D | O2 sensor signal | — | — | — | — | — | — | — | — |
| E | Airflow signal (AFM) | — | W28 | — | 0.5 | MAXXECUSTREE-C1-J3 | — | — | — |
| F | Variable resistor (tuning) | — | — | — | — | — | — | — | — |
| G | Throttle position (TPS) | — | W30 | — | 0.5 | MAXXECUSTREE-C1-G2 | — | — | — |
| H | Atmospheric pressure (ATP) | — | — | — | — | — | — | — | — |
| I | Coolant temperature (ECT) | — | W31 | — | 0.5 | MAXXECUSTREE-C1-J1 | — | — | — |
| J | Inlet air temperature (IAT) | — | W32 | — | 0.5 | MAXXECUSTREE-C1-J2 | — | — | — |
| K | Turbo control valve (boost) | — | W26 | — | 0.5 | MAXXECUSTREE-C1-M3 | — | — | — |
| L | Manifold air temperature (MAT) | — | W33 | — | 0.5 | MAXXECUSTREE-C1-F1 | — | — | — |
| M | Pressure regulator control valve | — | W27 | — | 0.5 | MAXXECUSTREE-C1-L3 | — | — | — |
| 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 | — | W20 | — | 0.5 | MAXXECUSTREE-C1-M1 | — | — | — |
| D | Starter inhibit / fuel pump control | — | W23 | — | 0.5 | MAXXECUSTREE-C1-C4 | — | — | — |
| E | Primary injector 1 | — | W18 | — | 0.5 | MAXXECUSTREE-C1-K1 | — | — | — |
| F | Secondary injector 2 | — | W21 | — | 0.5 | MAXXECUSTREE-C1-M2 | — | — | — |
| G | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| H | Secondary injector 1 | — | W19 | — | 0.5 | MAXXECUSTREE-C1-K2 | — | — | — |
| 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 | MAXXECUSTREE-C1-H1 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | MAXXECUSTREE-C1-H2 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-3-I | — | — | — |
| 1 | — | — | W2 | — | 0.85 | MAXXECUSTREE-C1-M4 | — | — | — |
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 | MAXXECUSTREE-C1-L4 | — | — | — |
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 | MAXXECUSTREE-C1-D4 | GPO 3 | low_side_out | single_source | |
| OEM-1-E | A/C request | digital_in | MAXXECUSTREE-C1-K4 | DIN 2 | digital_in | single_source | |
| OEM-1-F | A/C clutch relay | low_side_out | MAXXECUSTREE-C1-B4 | 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 | MAXXECUSTREE-C1-H4 | HOME | trigger_in | corroborated | |
| OEM-1-O | Vehicle speed (mileage sensor) | digital_in | MAXXECUSTREE-C1-K3 | DIN 1 | digital_in | single_source | |
| OEM-1-P | CAS ground | sensor_ground | MAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2 | Sensor GND + Trigger GND | sensor_ground | corroborated | |
| OEM-1-Q | CAS ground | sensor_ground | MAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2 | Sensor GND + Trigger GND | sensor_ground | corroborated | |
| OEM-1-R | Knock input | knock_in | — | — | — | corroborated | |
| OEM-1-S | Port air valve | low_side_out | MAXXECUSTREE-C1-A4 | GPO 8/TACHO | low_side_out | single_source | |
| OEM-1-T | CAS 24-tooth (NE, crank) | trigger_in | MAXXECUSTREE-C1-H3 | TRIGGER | trigger_in | corroborated | |
| OEM-1-U | Ignition select (trailing rotor) | ignition_out | MAXXECUSTREE-C1-A2 | IGN 1 | ignition_out | corroborated | |
| OEM-1-V | Ignition leading | ignition_out | MAXXECUSTREE-C1-A3 | IGN 2 | ignition_out | corroborated | |
| OEM-1-X | Ignition trailing | ignition_out | MAXXECUSTREE-C1-B2 | IGN 3 | ignition_out | single_source | |
| OEM-2-A | 5V sensor supply | vref | MAXXECUSTREE-C1-G1 | +5V sensor supply | vref | single_source | |
| OEM-2-B | MAP (pressure) signal | analog_in | MAXXECUSTREE-C1-J4 | AIN 4 (0-5V) | analog_in | single_source | |
| OEM-2-C | Sensor ground | sensor_ground | MAXXECUSTREE-C1-H1 + MAXXECUSTREE-C1-H2 | Sensor GND + Trigger GND | sensor_ground | single_source | |
| OEM-2-D | O2 sensor signal | lambda_nb_in | — | — | — | single_source | |
| OEM-2-E | Airflow signal (AFM) | analog_in | MAXXECUSTREE-C1-J3 | 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 | MAXXECUSTREE-C1-G2 | TPS/AIN | analog_in | single_source | |
| OEM-2-H | Atmospheric pressure (ATP) | analog_in | — | — | — | single_source | |
| OEM-2-I | Coolant temperature (ECT) | temp_in | MAXXECUSTREE-C1-J1 | AIN 1 (temperature) | temp_in | single_source | |
| OEM-2-J | Inlet air temperature (IAT) | temp_in | MAXXECUSTREE-C1-J2 | AIN 2 (Temperature) | temp_in | single_source | |
| OEM-2-K | Turbo control valve (boost) | low_side_out | MAXXECUSTREE-C1-M3 | INJ 5 | injector_out | single_source | |
| OEM-2-L | Manifold air temperature (MAT) | temp_in | MAXXECUSTREE-C1-F1 | CLT | temp_in | single_source | |
| OEM-2-M | Pressure regulator control valve | low_side_out | MAXXECUSTREE-C1-L3 | INJ 6 | injector_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 | MAXXECUSTREE-C1-L4 | Engine GND | ground | single_source | |
| OEM-3-A | Power ground | ground | MAXXECUSTREE-C1-L4 | Engine GND | ground | single_source | |
| OEM-3-B | Starter input | digital_in | — | — | — | single_source | |
| OEM-3-C | Primary injector 2 | injector_out | MAXXECUSTREE-C1-M1 | INJ 3 | injector_out | single_source | |
| OEM-3-D | Starter inhibit / fuel pump control | low_side_out | MAXXECUSTREE-C1-C4 | GPO 2 | low_side_out | single_source | |
| OEM-3-E | Primary injector 1 | injector_out | MAXXECUSTREE-C1-K1 | INJ 1 | injector_out | single_source | |
| OEM-3-F | Secondary injector 2 | injector_out | MAXXECUSTREE-C1-M2 | INJ 4 | injector_out | single_source | |
| OEM-3-G | Power ground | ground | MAXXECUSTREE-C1-L4 | Engine GND | ground | single_source | |
| OEM-3-H | Secondary injector 1 | injector_out | MAXXECUSTREE-C1-K2 | INJ 2 | injector_out | single_source | |
| OEM-3-I | Ignition power (+12V via main relay) | power_in | MAXXECUSTREE-C1-M4 | +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 | MAXXECUSTREE-C1-M4 | 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 | MAXXECUSTREE-C1-L4 | 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 | MAXXECUSTREE-C1-H1 | 0.5 | no route | Sensor GND | — | |
| W11 | SP-0V-1 | MAXXECUSTREE-C1-H2 | 0.5 | no route | Trigger GND | — | |
| W12 | OEM-2-A | MAXXECUSTREE-C1-G1 | 0.5 | no route | 5V sensor supply | — | |
| W13 | OEM-1-T | MAXXECUSTREE-C1-H3 | 0.5 | no route | CAS 24-tooth (NE, crank) | — | |
| W14 | OEM-1-N | MAXXECUSTREE-C1-H4 | 0.5 | no route | CAS 2-tooth (G, cam) | — | |
| W15 | OEM-1-U | MAXXECUSTREE-C1-A2 | 0.5 | no route | Ignition select (trailing rotor) | — | |
| W16 | OEM-1-V | MAXXECUSTREE-C1-A3 | 0.5 | no route | Ignition leading | — | |
| W17 | OEM-1-X | MAXXECUSTREE-C1-B2 | 0.5 | no route | Ignition trailing | — | |
| W18 | OEM-3-E | MAXXECUSTREE-C1-K1 | 0.5 | no route | Primary injector 1 | — | |
| W19 | OEM-3-H | MAXXECUSTREE-C1-K2 | 0.5 | no route | Secondary injector 1 | — | |
| W20 | OEM-3-C | MAXXECUSTREE-C1-M1 | 0.5 | no route | Primary injector 2 | — | |
| W21 | OEM-3-F | MAXXECUSTREE-C1-M2 | 0.5 | no route | Secondary injector 2 | — | |
| W22 | OEM-1-F | MAXXECUSTREE-C1-B4 | 0.5 | no route | A/C clutch relay | — | |
| W23 | OEM-3-D | MAXXECUSTREE-C1-C4 | 0.5 | no route | Starter inhibit / fuel pump control | — | |
| W24 | OEM-1-C | MAXXECUSTREE-C1-D4 | 0.5 | no route | Air bypass solenoid | — | |
| W25 | OEM-1-S | MAXXECUSTREE-C1-A4 | 0.5 | no route | Port air valve | — | |
| W26 | OEM-2-K | MAXXECUSTREE-C1-M3 | 0.5 | no route | Turbo control valve (boost) | — | |
| W27 | OEM-2-M | MAXXECUSTREE-C1-L3 | 0.5 | no route | Pressure regulator control valve | — | |
| W28 | OEM-2-E | MAXXECUSTREE-C1-J3 | 0.5 | no route | Airflow signal (AFM) | — | |
| W29 | OEM-2-B | MAXXECUSTREE-C1-J4 | 0.5 | no route | MAP (pressure) signal | — | |
| W30 | OEM-2-G | MAXXECUSTREE-C1-G2 | 0.5 | no route | Throttle position (TPS) | — | |
| W31 | OEM-2-I | MAXXECUSTREE-C1-J1 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W32 | OEM-2-J | MAXXECUSTREE-C1-J2 | 0.5 | no route | Inlet air temperature (IAT) | — | |
| W33 | OEM-2-L | MAXXECUSTREE-C1-F1 | 0.5 | no route | Manifold air temperature (MAT) | — | |
| W34 | OEM-1-O | MAXXECUSTREE-C1-K3 | 0.5 | no route | Vehicle speed (mileage sensor) | — | |
| W35 | OEM-1-E | MAXXECUSTREE-C1-K4 | 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 (4)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | LOAD_UNKNOWN | MAXXECUSTREE-C1-B4 | MAXXECUSTREE-C1-B4 "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 | NET_FAMILY | OEM-2-K ↔ MAXXECUSTREE-C1-M3 | OEM-2-K "Turbo control valve (boost)" [low_side_out] is wired to MAXXECUSTREE-C1-M3 "INJ 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-M ↔ MAXXECUSTREE-C1-L3 | OEM-2-M "Pressure regulator control valve" [low_side_out] is wired to MAXXECUSTREE-C1-L3 "INJ 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | UNMAPPED | OEM | 13 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-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. Not wired: - OEM-3 J: Battery constant (+12V): MaxxECU MaxxECU STREET has no battery-constant input; not needed - OEM-1 R: Knock input: no free knock input on MaxxECU MaxxECU STREET - OEM-2 N: EGR valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU STREET - OEM-2 O: Switching valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU STREET - OEM-2 P: Relief valve: no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU STREET - OEM-2 Q: Idle control (BAC): no free low_side/ls_hs/injector/hbridge on MaxxECU MaxxECU STREET - OEM-1 M: Ignition feedback (tacho): no free tacho/frequency_out/low_side/ls_hs on MaxxECU MaxxECU STREET - OEM-2 D: O2 sensor signal: no free o2_narrowband/analog_0_5 on MaxxECU MaxxECU STREET - OEM-2 F: Variable resistor (tuning): no free analog_0_5 on MaxxECU MaxxECU STREET - OEM-2 H: Atmospheric pressure (ATP): no free analog_0_5 on MaxxECU MaxxECU STREET - OEM-1 G: Neutral switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU STREET - OEM-1 H: Water temperature switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU STREET - OEM-1 L: Clutch switch: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU STREET - OEM-3 B: Starter input: no free switch_in/frequency_in/analog_0_5 on MaxxECU MaxxECU STREET
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/ | — | — | — |