Mazda RX-7 FC 1986-92 (13B-T Turbo II) → Link G4X MonsoonX (auto)
Mazda RX-7 FC 1986-92 (13B-T Turbo II) — Link — G4X MonsoonX
⚠ 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 | none |
| Size of the job | 37 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 | G4XMONSOONX-A-A5 | 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 | G4XMONSOONX-A-A25 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | G4XMONSOONX-A-A34 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-1-P | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-1-Q | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-2-C | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-0V-1 | G4XMONSOONX-A-A24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-2-A | G4XMONSOONX-A-A32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-1-T | G4XMONSOONX-A-A8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-1-N | G4XMONSOONX-A-A9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-1-R | G4XMONSOONX-A-A6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-1-U | G4XMONSOONX-A-A13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-1-V | G4XMONSOONX-A-A12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-1-X | G4XMONSOONX-A-A11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-3-E | G4XMONSOONX-A-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-3-H | G4XMONSOONX-A-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-3-C | G4XMONSOONX-A-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-3-F | G4XMONSOONX-A-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-1-F | G4XMONSOONX-A-A21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-3-D | G4XMONSOONX-A-A20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-1-C | G4XMONSOONX-A-A19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-1-S | G4XMONSOONX-A-A18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-2-K | G4XMONSOONX-A-A27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-2-M | G4XMONSOONX-A-A26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-2-E | G4XMONSOONX-A-A17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-2-B | G4XMONSOONX-A-A22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-2-G | G4XMONSOONX-A-A33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-2-D | G4XMONSOONX-A-A14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-2-I | G4XMONSOONX-A-A15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-2-J | G4XMONSOONX-A-A16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-1-O | G4XMONSOONX-A-A30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-1-E | G4XMONSOONX-A-A31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-1-G | G4XMONSOONX-A-A23 | 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 | G4XMONSOONX-A-A32 | G4XMONSOONX-A-A25 | open (OL) | 5 V sensor reference must not touch power ground | |
| 2 | G4XMONSOONX-A-A24 | G4XMONSOONX-A-A32 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 3 | G4XMONSOONX-A-A24 | G4XMONSOONX-A-A5 | open (OL) | sensor ground must not touch +12 V supply | |
| 4 | G4XMONSOONX-A-A25 | G4XMONSOONX-A-A5 | open (OL) | power ground must not touch +12 V supply | |
| 5 | G4XMONSOONX-A-A32 | G4XMONSOONX-A-A5 | open (OL) | 5 V sensor reference must not touch +12 V supply |
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
G4XMONSOONX-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | Injector 4 | — | W22 | — | 0.5 | OEM-3-F | — | — | — |
| A10 | Ignition 4 | — | — | — | — | — | — | — | — |
| A11 | Ignition 3 | — | W18 | — | 0.5 | OEM-1-X | — | — | — |
| A12 | Ignition 2 | — | W17 | — | 0.5 | OEM-1-V | — | — | — |
| A13 | Ignition 1 | — | W16 | — | 0.5 | OEM-1-U | — | — | — |
| A14 | Analog Volt 4 | — | W32 | — | 0.5 | OEM-2-D | — | — | — |
| A15 | Analog Temp 1 | — | W33 | — | 0.5 | OEM-2-I | — | — | — |
| A16 | Analog Temp 2 | — | W34 | — | 0.5 | OEM-2-J | — | — | — |
| A17 | Analog Volt 1 | — | W29 | — | 0.5 | OEM-2-E | — | — | — |
| A18 | Aux 4 | — | W26 | — | 0.5 | OEM-1-S | — | — | — |
| A19 | Aux 3 | — | W25 | — | 0.5 | OEM-1-C | — | — | — |
| A2 | Injector 3 | — | W21 | — | 0.5 | OEM-3-C | — | — | — |
| A20 | Aux 2 | — | W24 | — | 0.5 | OEM-3-D | — | — | — |
| A21 | Aux 1 | — | W23 | — | 0.5 | OEM-1-F | — | — | — |
| A22 | Analog Volt 2 | — | W30 | — | 0.5 | OEM-2-B | — | — | — |
| A23 | Digital Input 3 | — | W37 | — | 0.5 | OEM-1-G | — | — | — |
| A24 | Sensor Ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| A25 | System Ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| A26 | Aux 6 | — | W28 | — | 0.5 | OEM-2-M | — | — | — |
| A27 | Aux 5 | — | W27 | — | 0.5 | OEM-2-K | — | — | — |
| A28 | CAN H | — | — | — | — | — | — | — | — |
| A29 | CAN L | — | — | — | — | — | — | — | — |
| A3 | Injector 2 | — | W20 | — | 0.5 | OEM-3-H | — | — | — |
| A30 | Digital Input 1 | — | W35 | — | 0.5 | OEM-1-O | — | — | — |
| A31 | Digital Input 2 | — | W36 | — | 0.5 | OEM-1-E | — | — | — |
| A32 | +5V Out | — | W12 | — | 0.5 | OEM-2-A | — | — | — |
| A33 | Analog Volt 3 | — | W31 | — | 0.5 | OEM-2-G | — | — | — |
| A34 | System Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| A4 | Injector 1 | — | W19 | — | 0.5 | OEM-3-E | — | — | — |
| A5 | +14V ECU Power | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| A6 | Knock 1 / Digital Input 4 | — | W15 | — | 0.5 | OEM-1-R | — | — | — |
| A7 | Shield Ground | — | — | — | — | — | — | — | — |
| A8 | Trigger 1 | — | W13 | — | 0.5 | OEM-1-T | — | — | — |
| A9 | Trigger 2 | — | W14 | — | 0.5 | OEM-1-N | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| C | Air bypass solenoid | — | W25 | — | 0.5 | G4XMONSOONX-A-A19 | — | — | — |
| E | A/C request | — | W36 | — | 0.5 | G4XMONSOONX-A-A31 | — | — | — |
| F | A/C clutch relay | — | W23 | — | 0.5 | G4XMONSOONX-A-A21 | — | — | — |
| G | Neutral switch | — | W37 | — | 0.5 | G4XMONSOONX-A-A23 | — | — | — |
| H | Water temperature switch | — | — | — | — | — | — | — | — |
| L | Clutch switch | — | — | — | — | — | — | — | — |
| M | Ignition feedback (tacho) | — | — | — | — | — | — | — | — |
| N | CAS 2-tooth (G, cam) | — | W14 | — | 0.5 | G4XMONSOONX-A-A9 | — | — | — |
| O | Vehicle speed (mileage sensor) | — | W35 | — | 0.5 | G4XMONSOONX-A-A30 | — | — | — |
| P | CAS ground | — | W8 | — | 0.5 | SP-0V-1 | — | — | — |
| Q | CAS ground | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| R | Knock input | — | W15 | — | 0.5 | G4XMONSOONX-A-A6 | — | — | — |
| S | Port air valve | — | W26 | — | 0.5 | G4XMONSOONX-A-A18 | — | — | — |
| T | CAS 24-tooth (NE, crank) | — | W13 | — | 0.5 | G4XMONSOONX-A-A8 | — | — | — |
| U | Ignition select (trailing rotor) | — | W16 | — | 0.5 | G4XMONSOONX-A-A13 | — | — | — |
| V | Ignition leading | — | W17 | — | 0.5 | G4XMONSOONX-A-A12 | — | — | — |
| X | Ignition trailing | — | W18 | — | 0.5 | G4XMONSOONX-A-A11 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | 5V sensor supply | — | W12 | — | 0.5 | G4XMONSOONX-A-A32 | — | — | — |
| B | MAP (pressure) signal | — | W30 | — | 0.5 | G4XMONSOONX-A-A22 | — | — | — |
| C | Sensor ground | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| D | O2 sensor signal | — | W32 | — | 0.5 | G4XMONSOONX-A-A14 | — | — | — |
| E | Airflow signal (AFM) | — | W29 | — | 0.5 | G4XMONSOONX-A-A17 | — | — | — |
| F | Variable resistor (tuning) | — | — | — | — | — | — | — | — |
| G | Throttle position (TPS) | — | W31 | — | 0.5 | G4XMONSOONX-A-A33 | — | — | — |
| H | Atmospheric pressure (ATP) | — | — | — | — | — | — | — | — |
| I | Coolant temperature (ECT) | — | W33 | — | 0.5 | G4XMONSOONX-A-A15 | — | — | — |
| J | Inlet air temperature (IAT) | — | W34 | — | 0.5 | G4XMONSOONX-A-A16 | — | — | — |
| K | Turbo control valve (boost) | — | W27 | — | 0.5 | G4XMONSOONX-A-A27 | — | — | — |
| L | Manifold air temperature (MAT) | — | — | — | — | — | — | — | — |
| M | Pressure regulator control valve | — | W28 | — | 0.5 | G4XMONSOONX-A-A26 | — | — | — |
| 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 | G4XMONSOONX-A-A2 | — | — | — |
| D | Starter inhibit / fuel pump control | — | W24 | — | 0.5 | G4XMONSOONX-A-A20 | — | — | — |
| E | Primary injector 1 | — | W19 | — | 0.5 | G4XMONSOONX-A-A4 | — | — | — |
| F | Secondary injector 2 | — | W22 | — | 0.5 | G4XMONSOONX-A-A1 | — | — | — |
| G | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| H | Secondary injector 1 | — | W20 | — | 0.5 | G4XMONSOONX-A-A3 | — | — | — |
| 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 | — | — | W8 | — | 0.5 | OEM-1-P | — | — | — |
| 1 | — | — | W9 | — | 0.5 | OEM-1-Q | — | — | — |
| 1 | — | — | W10 | — | 0.5 | OEM-2-C | — | — | — |
| 1 | — | — | W11 | — | 0.5 | G4XMONSOONX-A-A24 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-3-I | — | — | — |
| 1 | — | — | W2 | — | 0.85 | G4XMONSOONX-A-A5 | — | — | — |
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 | G4XMONSOONX-A-A25 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | G4XMONSOONX-A-A34 | — | — | — |
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 | G4XMONSOONX-A-A19 | Aux 3 | low_side_out | single_source | |
| OEM-1-E | A/C request | digital_in | G4XMONSOONX-A-A31 | Digital Input 2 | digital_in | single_source | |
| OEM-1-F | A/C clutch relay | low_side_out | G4XMONSOONX-A-A21 | Aux 1 | low_side_out | single_source | |
| OEM-1-G | Neutral switch | digital_in | G4XMONSOONX-A-A23 | Digital Input 3 | 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 | G4XMONSOONX-A-A9 | Trigger 2 | trigger_in | corroborated | |
| OEM-1-O | Vehicle speed (mileage sensor) | digital_in | G4XMONSOONX-A-A30 | Digital Input 1 | digital_in | single_source | |
| OEM-1-P | CAS ground | sensor_ground | G4XMONSOONX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-1-Q | CAS ground | sensor_ground | G4XMONSOONX-A-A24 | Sensor Ground | sensor_ground | corroborated | |
| OEM-1-R | Knock input | knock_in | G4XMONSOONX-A-A6 | Knock 1 / Digital Input 4 | knock_in | corroborated | |
| OEM-1-S | Port air valve | low_side_out | G4XMONSOONX-A-A18 | Aux 4 | low_side_out | single_source | |
| OEM-1-T | CAS 24-tooth (NE, crank) | trigger_in | G4XMONSOONX-A-A8 | Trigger 1 | trigger_in | corroborated | |
| OEM-1-U | Ignition select (trailing rotor) | ignition_out | G4XMONSOONX-A-A13 | Ignition 1 | ignition_out | corroborated | |
| OEM-1-V | Ignition leading | ignition_out | G4XMONSOONX-A-A12 | Ignition 2 | ignition_out | corroborated | |
| OEM-1-X | Ignition trailing | ignition_out | G4XMONSOONX-A-A11 | Ignition 3 | ignition_out | single_source | |
| OEM-2-A | 5V sensor supply | vref | G4XMONSOONX-A-A32 | +5V Out | vref | single_source | |
| OEM-2-B | MAP (pressure) signal | analog_in | G4XMONSOONX-A-A22 | Analog Volt 2 | analog_in | single_source | |
| OEM-2-C | Sensor ground | sensor_ground | G4XMONSOONX-A-A24 | Sensor Ground | sensor_ground | single_source | |
| OEM-2-D | O2 sensor signal | lambda_nb_in | G4XMONSOONX-A-A14 | Analog Volt 4 | analog_in | single_source | |
| OEM-2-E | Airflow signal (AFM) | analog_in | G4XMONSOONX-A-A17 | Analog Volt 1 | analog_in | single_source | |
| OEM-2-F | Variable resistor (tuning) | analog_in | — | — | — | single_source | |
| OEM-2-G | Throttle position (TPS) | analog_in | G4XMONSOONX-A-A33 | Analog Volt 3 | analog_in | single_source | |
| OEM-2-H | Atmospheric pressure (ATP) | analog_in | — | — | — | single_source | |
| OEM-2-I | Coolant temperature (ECT) | temp_in | G4XMONSOONX-A-A15 | Analog Temp 1 | temp_in | single_source | |
| OEM-2-J | Inlet air temperature (IAT) | temp_in | G4XMONSOONX-A-A16 | Analog Temp 2 | temp_in | single_source | |
| OEM-2-K | Turbo control valve (boost) | low_side_out | G4XMONSOONX-A-A27 | Aux 5 | 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 | G4XMONSOONX-A-A26 | Aux 6 | 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 | G4XMONSOONX-A-A25 + G4XMONSOONX-A-A34 | System Ground + System Ground | ground | single_source | |
| OEM-3-A | Power ground | ground | G4XMONSOONX-A-A25 + G4XMONSOONX-A-A34 | System Ground + System Ground | ground | single_source | |
| OEM-3-B | Starter input | digital_in | — | — | — | single_source | |
| OEM-3-C | Primary injector 2 | injector_out | G4XMONSOONX-A-A2 | Injector 3 | injector_out | single_source | |
| OEM-3-D | Starter inhibit / fuel pump control | low_side_out | G4XMONSOONX-A-A20 | Aux 2 | low_side_out | single_source | |
| OEM-3-E | Primary injector 1 | injector_out | G4XMONSOONX-A-A4 | Injector 1 | injector_out | single_source | |
| OEM-3-F | Secondary injector 2 | injector_out | G4XMONSOONX-A-A1 | Injector 4 | injector_out | single_source | |
| OEM-3-G | Power ground | ground | G4XMONSOONX-A-A25 + G4XMONSOONX-A-A34 | System Ground + System Ground | ground | single_source | |
| OEM-3-H | Secondary injector 1 | injector_out | G4XMONSOONX-A-A3 | Injector 2 | injector_out | single_source | |
| OEM-3-I | Ignition power (+12V via main relay) | power_in | G4XMONSOONX-A-A5 | +14V ECU Power | 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 | G4XMONSOONX-A-A5 | 0.85 | no route | +14V ECU Power | — | |
| 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 | G4XMONSOONX-A-A25 | 0.85 | no route | System Ground | — | |
| W7 | SP-GND-1 | G4XMONSOONX-A-A34 | 0.85 | no route | System Ground | — | |
| W8 | OEM-1-P | SP-0V-1 | 0.5 | no route | CAS ground | — | |
| W9 | OEM-1-Q | SP-0V-1 | 0.5 | no route | CAS ground | — | |
| W10 | OEM-2-C | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W11 | SP-0V-1 | G4XMONSOONX-A-A24 | 0.5 | no route | Sensor Ground | — | |
| W12 | OEM-2-A | G4XMONSOONX-A-A32 | 0.5 | no route | 5V sensor supply | — | |
| W13 | OEM-1-T | G4XMONSOONX-A-A8 | 0.5 | no route | CAS 24-tooth (NE, crank) | — | |
| W14 | OEM-1-N | G4XMONSOONX-A-A9 | 0.5 | no route | CAS 2-tooth (G, cam) | — | |
| W15 | OEM-1-R | G4XMONSOONX-A-A6 | 0.5 | no route | Knock input | — | |
| W16 | OEM-1-U | G4XMONSOONX-A-A13 | 0.5 | no route | Ignition select (trailing rotor) | — | |
| W17 | OEM-1-V | G4XMONSOONX-A-A12 | 0.5 | no route | Ignition leading | — | |
| W18 | OEM-1-X | G4XMONSOONX-A-A11 | 0.5 | no route | Ignition trailing | — | |
| W19 | OEM-3-E | G4XMONSOONX-A-A4 | 0.5 | no route | Primary injector 1 | — | |
| W20 | OEM-3-H | G4XMONSOONX-A-A3 | 0.5 | no route | Secondary injector 1 | — | |
| W21 | OEM-3-C | G4XMONSOONX-A-A2 | 0.5 | no route | Primary injector 2 | — | |
| W22 | OEM-3-F | G4XMONSOONX-A-A1 | 0.5 | no route | Secondary injector 2 | — | |
| W23 | OEM-1-F | G4XMONSOONX-A-A21 | 0.5 | no route | A/C clutch relay | — | |
| W24 | OEM-3-D | G4XMONSOONX-A-A20 | 0.5 | no route | Starter inhibit / fuel pump control | — | |
| W25 | OEM-1-C | G4XMONSOONX-A-A19 | 0.5 | no route | Air bypass solenoid | — | |
| W26 | OEM-1-S | G4XMONSOONX-A-A18 | 0.5 | no route | Port air valve | — | |
| W27 | OEM-2-K | G4XMONSOONX-A-A27 | 0.5 | no route | Turbo control valve (boost) | — | |
| W28 | OEM-2-M | G4XMONSOONX-A-A26 | 0.5 | no route | Pressure regulator control valve | — | |
| W29 | OEM-2-E | G4XMONSOONX-A-A17 | 0.5 | no route | Airflow signal (AFM) | — | |
| W30 | OEM-2-B | G4XMONSOONX-A-A22 | 0.5 | no route | MAP (pressure) signal | — | |
| W31 | OEM-2-G | G4XMONSOONX-A-A33 | 0.5 | no route | Throttle position (TPS) | — | |
| W32 | OEM-2-D | G4XMONSOONX-A-A14 | 0.5 | no route | O2 sensor signal | — | |
| W33 | OEM-2-I | G4XMONSOONX-A-A15 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W34 | OEM-2-J | G4XMONSOONX-A-A16 | 0.5 | no route | Inlet air temperature (IAT) | — | |
| W35 | OEM-1-O | G4XMONSOONX-A-A30 | 0.5 | no route | Vehicle speed (mileage sensor) | — | |
| W36 | OEM-1-E | G4XMONSOONX-A-A31 | 0.5 | no route | A/C request | — | |
| W37 | OEM-1-G | G4XMONSOONX-A-A23 | 0.5 | no route | Neutral switch | — |
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 (2)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | LOAD_UNKNOWN | G4XMONSOONX-A-A21 | G4XMONSOONX-A-A21 "Aux 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 | 11 optional OEM pins are not mapped: OEM-1-H Water temperature switch; OEM-1-L Clutch switch; OEM-1-M Ignition feedback (tacho); OEM-2-F Variable resistor (tuning); OEM-2-H Atmospheric pressure (ATP); OEM-2-L Manifold air temperature (MAT); 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
Fit check: unconfirmed. Confirm these before building: - Trigger pattern for Mazda 13B-T not found in the ECU's docs (Link's trigger-mode list is only inside PCLink, not online) 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): Link G4X MonsoonX has no battery-constant input; not needed - OEM-2 N: EGR valve: no free low_side/ls_hs/injector/hbridge on Link G4X MonsoonX - OEM-2 O: Switching valve: no free low_side/ls_hs/injector/hbridge on Link G4X MonsoonX - OEM-2 P: Relief valve: no free low_side/ls_hs/injector/hbridge on Link G4X MonsoonX - OEM-2 Q: Idle control (BAC): no free low_side/ls_hs/injector/hbridge on Link G4X MonsoonX - OEM-1 M: Ignition feedback (tacho): no free tacho/frequency_out/low_side/ls_hs on Link G4X MonsoonX - OEM-2 L: Manifold air temperature (MAT): no free thermistor/analog_0_5 on Link G4X MonsoonX - OEM-2 F: Variable resistor (tuning): no free analog_0_5 on Link G4X MonsoonX - OEM-2 H: Atmospheric pressure (ATP): no free analog_0_5 on Link G4X MonsoonX - OEM-1 H: Water temperature switch: no free switch_in/frequency_in/analog_0_5 on Link G4X MonsoonX - OEM-1 L: Clutch switch: no free switch_in/frequency_in/analog_0_5 on Link G4X MonsoonX - OEM-3 B: Starter input: no free switch_in/frequency_in/analog_0_5 on Link G4X MonsoonX
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 | Link: G4X MonsoonX quickstart + RET 115-1000 | https://linkecu.com/documentation/MonsoonXQuickstartGuide.pdf | archive | 2026-10-05 | e8d432b273d6 |
| 3 | community_copy | YourSpec: Link G4X MonsoonX flying-lead harness wiring list | https://wpm.yourspec.com/projects/view/1469 | — | — | — |
| 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/ | — | — | — |