Mazda RX-7 FC 1986-92 (13B-T Turbo II) → AMP EFI MS3Pro Mini (auto)
Mazda RX-7 FC 1986-92 (13B-T Turbo II) — AMP EFI — MS3Pro Mini
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 | 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 | MS3PROMINI-A-1 | 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 | MS3PROMINI-A-22 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | MS3PROMINI-A-23 | 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 | MS3PROMINI-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-2-A | MS3PROMINI-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-1-T | MS3PROMINI-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-1-N | MS3PROMINI-A-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-1-U | MS3PROMINI-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-1-V | MS3PROMINI-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-1-X | MS3PROMINI-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-3-E | MS3PROMINI-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-3-H | MS3PROMINI-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-3-C | MS3PROMINI-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-3-F | MS3PROMINI-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-1-F | MS3PROMINI-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-3-D | MS3PROMINI-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-1-C | MS3PROMINI-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-1-S | MS3PROMINI-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-2-K | MS3PROMINI-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-2-M | MS3PROMINI-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-2-E | MS3PROMINI-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-2-B | MS3PROMINI-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-2-G | MS3PROMINI-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-2-D | MS3PROMINI-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-2-I | MS3PROMINI-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-2-J | MS3PROMINI-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-2-L | MS3PROMINI-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-1-O | MS3PROMINI-A-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-1-E | MS3PROMINI-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-1-G | MS3PROMINI-A-35 | 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 | MS3PROMINI-A-2 | MS3PROMINI-A-22 | open (OL) | 5 V sensor reference must not touch power ground | |
| 2 | MS3PROMINI-A-2 | MS3PROMINI-A-1 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 3 | MS3PROMINI-A-21 | MS3PROMINI-A-1 | open (OL) | sensor ground must not touch +12 V supply | |
| 4 | MS3PROMINI-A-21 | MS3PROMINI-A-2 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 5 | MS3PROMINI-A-22 | MS3PROMINI-A-1 | open (OL) | power ground must not touch +12 V supply |
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
MS3PROMINI-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 12V+ switched power in | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 10 | Injector out F | — | W18 | — | 0.5 | OEM-3-E | — | — | — |
| 11 | Injector out G | — | W19 | — | 0.5 | OEM-3-H | — | — | — |
| 12 | Injector out H | — | W20 | — | 0.5 | OEM-3-C | — | — | — |
| 13 | Analog in 1 | — | W28 | — | 0.5 | OEM-2-E | — | — | — |
| 14 | Analog in 2 | — | W29 | — | 0.5 | OEM-2-B | — | — | — |
| 15 | Analog in 3 | — | W31 | — | 0.5 | OEM-2-D | — | — | — |
| 16 | Analog in 4 | — | W34 | — | 0.5 | OEM-2-L | — | — | — |
| 17 | Spark out A | — | W15 | — | 0.5 | OEM-1-U | — | — | — |
| 18 | Spark out B | — | W16 | — | 0.5 | OEM-1-V | — | — | — |
| 19 | Spark out C | — | W17 | — | 0.5 | OEM-1-X | — | — | — |
| 2 | +5V VREF out | — | W12 | — | 0.5 | OEM-2-A | — | — | — |
| 20 | Spark out D | — | — | — | — | — | — | — | — |
| 21 | Sensor ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 23 | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 24 | CAN Low | — | — | — | — | — | — | — | — |
| 25 | CAN High | — | — | — | — | — | — | — | — |
| 26 | CLT in | — | W32 | — | 0.5 | OEM-2-I | — | — | — |
| 27 | IAT in | — | W33 | — | 0.5 | OEM-2-J | — | — | — |
| 28 | TPS in | — | W30 | — | 0.5 | OEM-2-G | — | — | — |
| 29 | Digital switched in 1 / Flex fuel | — | W36 | — | 0.5 | OEM-1-E | — | — | — |
| 3 | PWM out 1 / Idle | — | W23 | — | 0.5 | OEM-3-D | — | — | — |
| 30 | CKP+ | — | W13 | — | 0.5 | OEM-1-T | — | — | — |
| 31 | CKP- | — | — | — | — | — | — | — | — |
| 32 | CMP+ | — | W14 | — | 0.5 | OEM-1-N | — | — | — |
| 33 | CMP- | — | — | — | — | — | — | — | — |
| 34 | Digital frequency in 1 (Hall) | — | W35 | — | 0.5 | OEM-1-O | — | — | — |
| 35 | Digital frequency in 2 (Hall) | — | W37 | — | 0.5 | OEM-1-G | — | — | — |
| 4 | Fuel pump out | — | W22 | — | 0.5 | OEM-1-F | — | — | — |
| 5 | Injector out A | — | W21 | — | 0.5 | OEM-3-F | — | — | — |
| 6 | Injector out B | — | W24 | — | 0.5 | OEM-1-C | — | — | — |
| 7 | Injector out C | — | W25 | — | 0.5 | OEM-1-S | — | — | — |
| 8 | Injector out D | — | W26 | — | 0.5 | OEM-2-K | — | — | — |
| 9 | Injector out E | — | W27 | — | 0.5 | OEM-2-M | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| C | Air bypass solenoid | — | W24 | — | 0.5 | MS3PROMINI-A-6 | — | — | — |
| E | A/C request | — | W36 | — | 0.5 | MS3PROMINI-A-29 | — | — | — |
| F | A/C clutch relay | — | W22 | — | 0.5 | MS3PROMINI-A-4 | — | — | — |
| G | Neutral switch | — | W37 | — | 0.5 | MS3PROMINI-A-35 | — | — | — |
| H | Water temperature switch | — | — | — | — | — | — | — | — |
| L | Clutch switch | — | — | — | — | — | — | — | — |
| M | Ignition feedback (tacho) | — | — | — | — | — | — | — | — |
| N | CAS 2-tooth (G, cam) | — | W14 | — | 0.5 | MS3PROMINI-A-32 | — | — | — |
| O | Vehicle speed (mileage sensor) | — | W35 | — | 0.5 | MS3PROMINI-A-34 | — | — | — |
| P | CAS ground | — | W8 | — | 0.5 | SP-0V-1 | — | — | — |
| Q | CAS ground | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| R | Knock input | — | — | — | — | — | — | — | — |
| S | Port air valve | — | W25 | — | 0.5 | MS3PROMINI-A-7 | — | — | — |
| T | CAS 24-tooth (NE, crank) | — | W13 | — | 0.5 | MS3PROMINI-A-30 | — | — | — |
| U | Ignition select (trailing rotor) | — | W15 | — | 0.5 | MS3PROMINI-A-17 | — | — | — |
| V | Ignition leading | — | W16 | — | 0.5 | MS3PROMINI-A-18 | — | — | — |
| X | Ignition trailing | — | W17 | — | 0.5 | MS3PROMINI-A-19 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | 5V sensor supply | — | W12 | — | 0.5 | MS3PROMINI-A-2 | — | — | — |
| B | MAP (pressure) signal | — | W29 | — | 0.5 | MS3PROMINI-A-14 | — | — | — |
| C | Sensor ground | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| D | O2 sensor signal | — | W31 | — | 0.5 | MS3PROMINI-A-15 | — | — | — |
| E | Airflow signal (AFM) | — | W28 | — | 0.5 | MS3PROMINI-A-13 | — | — | — |
| F | Variable resistor (tuning) | — | — | — | — | — | — | — | — |
| G | Throttle position (TPS) | — | W30 | — | 0.5 | MS3PROMINI-A-28 | — | — | — |
| H | Atmospheric pressure (ATP) | — | — | — | — | — | — | — | — |
| I | Coolant temperature (ECT) | — | W32 | — | 0.5 | MS3PROMINI-A-26 | — | — | — |
| J | Inlet air temperature (IAT) | — | W33 | — | 0.5 | MS3PROMINI-A-27 | — | — | — |
| K | Turbo control valve (boost) | — | W26 | — | 0.5 | MS3PROMINI-A-8 | — | — | — |
| L | Manifold air temperature (MAT) | — | W34 | — | 0.5 | MS3PROMINI-A-16 | — | — | — |
| M | Pressure regulator control valve | — | W27 | — | 0.5 | MS3PROMINI-A-9 | — | — | — |
| 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 | MS3PROMINI-A-12 | — | — | — |
| D | Starter inhibit / fuel pump control | — | W23 | — | 0.5 | MS3PROMINI-A-3 | — | — | — |
| E | Primary injector 1 | — | W18 | — | 0.5 | MS3PROMINI-A-10 | — | — | — |
| F | Secondary injector 2 | — | W21 | — | 0.5 | MS3PROMINI-A-5 | — | — | — |
| G | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| H | Secondary injector 1 | — | W19 | — | 0.5 | MS3PROMINI-A-11 | — | — | — |
| 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 | MS3PROMINI-A-21 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-3-I | — | — | — |
| 1 | — | — | W2 | — | 0.85 | MS3PROMINI-A-1 | — | — | — |
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 | MS3PROMINI-A-22 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | MS3PROMINI-A-23 | — | — | — |
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 | MS3PROMINI-A-6 | Injector out B | injector_out | single_source | |
| OEM-1-E | A/C request | digital_in | MS3PROMINI-A-29 | Digital switched in 1 / Flex fuel | digital_in | single_source | |
| OEM-1-F | A/C clutch relay | low_side_out | MS3PROMINI-A-4 | Fuel pump out | low_side_out | single_source | |
| OEM-1-G | Neutral switch | digital_in | MS3PROMINI-A-35 | Digital frequency in 2 (Hall) | 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 | MS3PROMINI-A-32 | CMP+ | trigger_in | corroborated | |
| OEM-1-O | Vehicle speed (mileage sensor) | digital_in | MS3PROMINI-A-34 | Digital frequency in 1 (Hall) | digital_in | single_source | |
| OEM-1-P | CAS ground | sensor_ground | MS3PROMINI-A-21 | Sensor ground | sensor_ground | corroborated | |
| OEM-1-Q | CAS ground | sensor_ground | MS3PROMINI-A-21 | Sensor ground | sensor_ground | corroborated | |
| OEM-1-R | Knock input | knock_in | — | — | — | corroborated | |
| OEM-1-S | Port air valve | low_side_out | MS3PROMINI-A-7 | Injector out C | injector_out | single_source | |
| OEM-1-T | CAS 24-tooth (NE, crank) | trigger_in | MS3PROMINI-A-30 | CKP+ | trigger_in | corroborated | |
| OEM-1-U | Ignition select (trailing rotor) | ignition_out | MS3PROMINI-A-17 | Spark out A | ignition_out | corroborated | |
| OEM-1-V | Ignition leading | ignition_out | MS3PROMINI-A-18 | Spark out B | ignition_out | corroborated | |
| OEM-1-X | Ignition trailing | ignition_out | MS3PROMINI-A-19 | Spark out C | ignition_out | single_source | |
| OEM-2-A | 5V sensor supply | vref | MS3PROMINI-A-2 | +5V VREF out | vref | single_source | |
| OEM-2-B | MAP (pressure) signal | analog_in | MS3PROMINI-A-14 | Analog in 2 | analog_in | single_source | |
| OEM-2-C | Sensor ground | sensor_ground | MS3PROMINI-A-21 | Sensor ground | sensor_ground | single_source | |
| OEM-2-D | O2 sensor signal | lambda_nb_in | MS3PROMINI-A-15 | Analog in 3 | analog_in | single_source | |
| OEM-2-E | Airflow signal (AFM) | analog_in | MS3PROMINI-A-13 | Analog in 1 | analog_in | single_source | |
| OEM-2-F | Variable resistor (tuning) | analog_in | — | — | — | single_source | |
| OEM-2-G | Throttle position (TPS) | analog_in | MS3PROMINI-A-28 | TPS in | analog_in | single_source | |
| OEM-2-H | Atmospheric pressure (ATP) | analog_in | — | — | — | single_source | |
| OEM-2-I | Coolant temperature (ECT) | temp_in | MS3PROMINI-A-26 | CLT in | temp_in | single_source | |
| OEM-2-J | Inlet air temperature (IAT) | temp_in | MS3PROMINI-A-27 | IAT in | temp_in | single_source | |
| OEM-2-K | Turbo control valve (boost) | low_side_out | MS3PROMINI-A-8 | Injector out D | injector_out | single_source | |
| OEM-2-L | Manifold air temperature (MAT) | temp_in | MS3PROMINI-A-16 | Analog in 4 | analog_in | single_source | |
| OEM-2-M | Pressure regulator control valve | low_side_out | MS3PROMINI-A-9 | Injector out E | 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 | MS3PROMINI-A-22 + MS3PROMINI-A-23 | Power ground + Power ground | ground | single_source | |
| OEM-3-A | Power ground | ground | MS3PROMINI-A-22 + MS3PROMINI-A-23 | Power ground + Power ground | ground | single_source | |
| OEM-3-B | Starter input | digital_in | — | — | — | single_source | |
| OEM-3-C | Primary injector 2 | injector_out | MS3PROMINI-A-12 | Injector out H | injector_out | single_source | |
| OEM-3-D | Starter inhibit / fuel pump control | low_side_out | MS3PROMINI-A-3 | PWM out 1 / Idle | low_side_out | single_source | |
| OEM-3-E | Primary injector 1 | injector_out | MS3PROMINI-A-10 | Injector out F | injector_out | single_source | |
| OEM-3-F | Secondary injector 2 | injector_out | MS3PROMINI-A-5 | Injector out A | injector_out | single_source | |
| OEM-3-G | Power ground | ground | MS3PROMINI-A-22 + MS3PROMINI-A-23 | Power ground + Power ground | ground | single_source | |
| OEM-3-H | Secondary injector 1 | injector_out | MS3PROMINI-A-11 | Injector out G | injector_out | single_source | |
| OEM-3-I | Ignition power (+12V via main relay) | power_in | MS3PROMINI-A-1 | 12V+ switched power in | 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 | MS3PROMINI-A-1 | 0.85 | no route | 12V+ switched power in | — | |
| 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 | MS3PROMINI-A-22 | 0.85 | no route | Power ground | — | |
| W7 | SP-GND-1 | MS3PROMINI-A-23 | 0.85 | no route | Power 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 | MS3PROMINI-A-21 | 0.5 | no route | Sensor ground | — | |
| W12 | OEM-2-A | MS3PROMINI-A-2 | 0.5 | no route | 5V sensor supply | — | |
| W13 | OEM-1-T | MS3PROMINI-A-30 | 0.5 | no route | CAS 24-tooth (NE, crank) | — | |
| W14 | OEM-1-N | MS3PROMINI-A-32 | 0.5 | no route | CAS 2-tooth (G, cam) | — | |
| W15 | OEM-1-U | MS3PROMINI-A-17 | 0.5 | no route | Ignition select (trailing rotor) | — | |
| W16 | OEM-1-V | MS3PROMINI-A-18 | 0.5 | no route | Ignition leading | — | |
| W17 | OEM-1-X | MS3PROMINI-A-19 | 0.5 | no route | Ignition trailing | — | |
| W18 | OEM-3-E | MS3PROMINI-A-10 | 0.5 | no route | Primary injector 1 | — | |
| W19 | OEM-3-H | MS3PROMINI-A-11 | 0.5 | no route | Secondary injector 1 | — | |
| W20 | OEM-3-C | MS3PROMINI-A-12 | 0.5 | no route | Primary injector 2 | — | |
| W21 | OEM-3-F | MS3PROMINI-A-5 | 0.5 | no route | Secondary injector 2 | — | |
| W22 | OEM-1-F | MS3PROMINI-A-4 | 0.5 | no route | A/C clutch relay | — | |
| W23 | OEM-3-D | MS3PROMINI-A-3 | 0.5 | no route | Starter inhibit / fuel pump control | — | |
| W24 | OEM-1-C | MS3PROMINI-A-6 | 0.5 | no route | Air bypass solenoid | — | |
| W25 | OEM-1-S | MS3PROMINI-A-7 | 0.5 | no route | Port air valve | — | |
| W26 | OEM-2-K | MS3PROMINI-A-8 | 0.5 | no route | Turbo control valve (boost) | — | |
| W27 | OEM-2-M | MS3PROMINI-A-9 | 0.5 | no route | Pressure regulator control valve | — | |
| W28 | OEM-2-E | MS3PROMINI-A-13 | 0.5 | no route | Airflow signal (AFM) | — | |
| W29 | OEM-2-B | MS3PROMINI-A-14 | 0.5 | no route | MAP (pressure) signal | — | |
| W30 | OEM-2-G | MS3PROMINI-A-28 | 0.5 | no route | Throttle position (TPS) | — | |
| W31 | OEM-2-D | MS3PROMINI-A-15 | 0.5 | no route | O2 sensor signal | — | |
| W32 | OEM-2-I | MS3PROMINI-A-26 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W33 | OEM-2-J | MS3PROMINI-A-27 | 0.5 | no route | Inlet air temperature (IAT) | — | |
| W34 | OEM-2-L | MS3PROMINI-A-16 | 0.5 | no route | Manifold air temperature (MAT) | — | |
| W35 | OEM-1-O | MS3PROMINI-A-34 | 0.5 | no route | Vehicle speed (mileage sensor) | — | |
| W36 | OEM-1-E | MS3PROMINI-A-29 | 0.5 | no route | A/C request | — | |
| W37 | OEM-1-G | MS3PROMINI-A-35 | 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 (6)
| Severity | Code | Subject | Message |
|---|---|---|---|
| info | NET_FAMILY | OEM-1-C ↔ MS3PROMINI-A-6 | OEM-1-C "Air bypass solenoid" [low_side_out] is wired to MS3PROMINI-A-6 "Injector out B" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-1-S ↔ MS3PROMINI-A-7 | OEM-1-S "Port air valve" [low_side_out] is wired to MS3PROMINI-A-7 "Injector out C" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-K ↔ MS3PROMINI-A-8 | OEM-2-K "Turbo control valve (boost)" [low_side_out] is wired to MS3PROMINI-A-8 "Injector out D" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-L ↔ MS3PROMINI-A-16 | OEM-2-L "Manifold air temperature (MAT)" [temp_in] is wired to MS3PROMINI-A-16 "Analog in 4" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-2-M ↔ MS3PROMINI-A-9 | OEM-2-M "Pressure regulator control valve" [low_side_out] is wired to MS3PROMINI-A-9 "Injector out E" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| 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-1-R Knock input; 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): AMP EFI MS3Pro Mini has no battery-constant input; not needed - OEM-1 R: Knock input: no free knock input on AMP EFI MS3Pro Mini - OEM-2 N: EGR valve: no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-2 O: Switching valve: no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-2 P: Relief valve: no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-2 Q: Idle control (BAC): no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-1 M: Ignition feedback (tacho): no free tacho/frequency_out/low_side/ls_hs on AMP EFI MS3Pro Mini - OEM-2 F: Variable resistor (tuning): no free analog_0_5 on AMP EFI MS3Pro Mini - OEM-2 H: Atmospheric pressure (ATP): no free analog_0_5 on AMP EFI MS3Pro Mini - OEM-1 H: Water temperature switch: no free switch_in/frequency_in/analog_0_5 on AMP EFI MS3Pro Mini - OEM-1 L: Clutch switch: no free switch_in/frequency_in/analog_0_5 on AMP EFI MS3Pro Mini - OEM-3 B: Starter input: no free switch_in/frequency_in/analog_0_5 on AMP EFI MS3Pro Mini
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | AMP EFI: MS3Pro Mini manual (fw 1.6.1) pinout & output ratings | https://cdn.shopify.com/s/files/1/0960/0014/7754/files/MS3Pro_User_Manual_Firmware_1.6.1_Mini.pdf?v=1760643335 | archive | 2026-10-05 | bed7d8ae8408 |
| 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 | — | — | — |
| 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/ | — | — | — |