Mazda RX-7 FC 1986-92 (13B-T Turbo II) → AMP EFI MS3Pro EVO+ HC (auto)
Mazda RX-7 FC 1986-92 (13B-T Turbo II) — AMP EFI — MS3Pro EVO+ HC
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 | 58 wires · 9 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 | MS3PROEVOHC-A-35 | 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 | MS3PROEVOHC-B-3 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | MS3PROEVOHC-B-5 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | MS3PROEVOHC-B-7 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | MS3PROEVOHC-B-9 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-1-P | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-1-Q | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-2-C | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | MS3PROEVOHC-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | MS3PROEVOHC-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | SP-0V-1 | MS3PROEVOHC-C-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | MS3PROEVOHC-C-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | MS3PROEVOHC-C-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | SP-0V-1 | MS3PROEVOHC-C-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | SP-0V-1 | MS3PROEVOHC-C-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-2-A | MS3PROEVOHC-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-1-T | MS3PROEVOHC-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | SP-0V-1 | MS3PROEVOHC-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-1-N | MS3PROEVOHC-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | SP-0V-1 | MS3PROEVOHC-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-1-R | MS3PROEVOHC-A-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-1-U | MS3PROEVOHC-B-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-1-V | MS3PROEVOHC-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-1-X | MS3PROEVOHC-B-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-3-E | MS3PROEVOHC-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-3-H | MS3PROEVOHC-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-3-C | MS3PROEVOHC-B-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-3-F | MS3PROEVOHC-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-1-F | MS3PROEVOHC-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-3-D | MS3PROEVOHC-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-1-C | MS3PROEVOHC-C-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-1-S | MS3PROEVOHC-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-2-K | MS3PROEVOHC-C-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-2-M | MS3PROEVOHC-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-2-N | MS3PROEVOHC-C-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-2-O | MS3PROEVOHC-C-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-2-P | MS3PROEVOHC-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-2-Q | MS3PROEVOHC-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-1-M | MS3PROEVOHC-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-2-E | MS3PROEVOHC-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-2-B | MS3PROEVOHC-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-2-G | MS3PROEVOHC-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-2-D | MS3PROEVOHC-A-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-2-I | MS3PROEVOHC-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-2-J | MS3PROEVOHC-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-2-L | MS3PROEVOHC-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-2-F | MS3PROEVOHC-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-2-H | MS3PROEVOHC-A-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-1-O | MS3PROEVOHC-B-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-1-E | MS3PROEVOHC-A-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-1-G | MS3PROEVOHC-B-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-1-H | MS3PROEVOHC-B-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-1-L | MS3PROEVOHC-C-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-3-B | MS3PROEVOHC-C-10 | 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 | MS3PROEVOHC-A-8 | MS3PROEVOHC-B-3 | open (OL) | 5 V sensor reference must not touch power ground | |
| 2 | MS3PROEVOHC-A-13 | MS3PROEVOHC-A-35 | open (OL) | sensor ground must not touch +12 V supply | |
| 3 | MS3PROEVOHC-A-13 | MS3PROEVOHC-A-8 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 4 | MS3PROEVOHC-A-8 | MS3PROEVOHC-A-35 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 5 | MS3PROEVOHC-B-3 | MS3PROEVOHC-A-35 | open (OL) | power ground must not touch +12 V supply |
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
MS3PROEVOHC-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | High current out 1 | — | W41 | — | 0.5 | OEM-2-P | — | — | — |
| 10 | MAT in | — | W48 | — | 0.5 | OEM-2-I | — | — | — |
| 11 | CLT in | — | W49 | — | 0.5 | OEM-2-J | — | — | — |
| 12 | Analog In 6 | — | — | — | — | — | — | — | — |
| 13 | Logic Ground | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 14 | PWM / Idle Out 1 | — | W34 | — | 0.5 | OEM-3-D | — | — | — |
| 15 | CKP− | — | W22 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Ground Shield Drain | — | — | — | — | — | — | — | — |
| 17 | Analog In 7 | — | — | — | — | — | — | — | — |
| 18 | Sensor return | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Analog in 1 | — | W44 | — | 0.5 | OEM-2-E | — | — | — |
| 2 | High current out 2 | — | W42 | — | 0.5 | OEM-2-Q | — | — | — |
| 20 | Analog in 2 | — | W45 | — | 0.5 | OEM-2-B | — | — | — |
| 21 | Analog in 3 | — | W50 | — | 0.5 | OEM-2-L | — | — | — |
| 22 | Analog In 4 | — | W51 | — | 0.5 | OEM-2-F | — | — | — |
| 23 | Analog In 5 | — | W52 | — | 0.5 | OEM-2-H | — | — | — |
| 24 | Tach out | — | W43 | — | 0.5 | OEM-1-M | — | — | — |
| 25 | O2 in | — | W47 | — | 0.5 | OEM-2-D | — | — | — |
| 26 | CMP+ | — | W23 | — | 0.5 | OEM-1-N | — | — | — |
| 27 | CMP− | — | W24 | — | 0.5 | SP-0V-1 | — | — | — |
| 28 | Fuel pump relay out | — | W33 | — | 0.5 | OEM-1-F | — | — | — |
| 29 | PWM out 2 | — | W36 | — | 0.5 | OEM-1-S | — | — | — |
| 3 | Injector out J | — | W29 | — | 0.5 | OEM-3-E | — | — | — |
| 30 | PWM out 3 | — | W38 | — | 0.5 | OEM-2-M | — | — | — |
| 31 | Knock in 1 | — | W25 | — | 0.5 | OEM-1-R | — | — | — |
| 32 | Digital switched in 1 | — | W54 | — | 0.5 | OEM-1-E | — | — | — |
| 33 | CAN L | — | — | — | — | — | — | — | — |
| 34 | CAN H | — | — | — | — | — | — | — | — |
| 35 | 12V+ switched power in | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Injector out I | — | W30 | — | 0.5 | OEM-3-H | — | — | — |
| 5 | High current out 3 | — | — | — | — | — | — | — | — |
| 6 | CKP+ | — | W21 | — | 0.5 | OEM-1-T | — | — | — |
| 7 | Knock In 2 | — | — | — | — | — | — | — | — |
| 8 | 5V+ VREF out | — | W20 | — | 0.5 | OEM-2-A | — | — | — |
| 9 | TPS in | — | W46 | — | 0.5 | OEM-2-G | — | — | — |
MS3PROEVOHC-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector out A | — | W31 | — | 0.5 | OEM-3-C | — | — | — |
| 10 | Injector out F | — | W32 | — | 0.5 | OEM-3-F | — | — | — |
| 11 | Injector out G | — | — | — | — | — | — | — | — |
| 12 | Injector out H | — | — | — | — | — | — | — | — |
| 13 | Spark out G | — | W26 | — | 0.5 | OEM-1-U | — | — | — |
| 14 | Spark out E | — | W27 | — | 0.5 | OEM-1-V | — | — | — |
| 15 | Spark out C | — | W28 | — | 0.5 | OEM-1-X | — | — | — |
| 16 | Spark out H | — | — | — | — | — | — | — | — |
| 17 | Digital frequency in 2 (Hall) | — | — | — | — | — | — | — | — |
| 18 | Ground Shield Drain | — | — | — | — | — | — | — | — |
| 19 | Digital switched 12V in | — | — | — | — | — | — | — | — |
| 2 | Injector out B | — | — | — | — | — | — | — | — |
| 20 | Digital switched in 2 | — | W55 | — | 0.5 | OEM-1-G | — | — | — |
| 21 | Digital frequency in 3 (unconditioned) | — | — | — | — | — | — | — | — |
| 22 | Digital Frequency in 3 (VR+) | — | — | — | — | — | — | — | — |
| 23 | Digital Frequency In 3 (VR−) | — | — | — | — | — | — | — | — |
| 24 | Spark out F | — | — | — | — | — | — | — | — |
| 25 | Spark out B | — | — | — | — | — | — | — | — |
| 26 | Spark out D | — | — | — | — | — | — | — | — |
| 27 | Spark out A | — | — | — | — | — | — | — | — |
| 28 | Digital frequency in 1 (unconditioned) | — | W53 | — | 0.5 | OEM-1-O | — | — | — |
| 29 | Digital switched in 3 | — | W56 | — | 0.5 | OEM-1-H | — | — | — |
| 3 | Ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 30 | Stepper IAC out 1B | — | — | — | — | — | — | — | — |
| 31 | Stepper IAC out 1A | — | — | — | — | — | — | — | — |
| 32 | Stepper IAC out 2A | — | — | — | — | — | — | — | — |
| 33 | Stepper IAC out 2B | — | — | — | — | — | — | — | — |
| 34 | Digital Frequency in 1 (VR+) | — | — | — | — | — | — | — | — |
| 35 | Digital Frequency in 1 (VR−) | — | — | — | — | — | — | — | — |
| 4 | Injector out C | — | — | — | — | — | — | — | — |
| 5 | Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 6 | Injector out D | — | — | — | — | — | — | — | — |
| 7 | Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 8 | Injector out E | — | — | — | — | — | — | — | — |
| 9 | Ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
MS3PROEVOHC-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | PWM out 5 | — | W40 | — | 0.5 | OEM-2-O | — | — | — |
| 10 | Digital switched in 5 | — | W58 | — | 0.5 | OEM-3-B | — | — | — |
| 11 | Digital switched in 4 | — | W57 | — | 0.5 | OEM-1-L | — | — | — |
| 12 | Digital I/O 5 | — | — | — | — | — | — | — | — |
| 13 | Digital I/O 3 | — | — | — | — | — | — | — | — |
| 14 | Digital I/O 1 | — | — | — | — | — | — | — | — |
| 15 | 5V+ VREF out 2 | — | — | — | — | — | — | — | — |
| 17 | Sensor return | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 18 | Sensor return | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Sensor return | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | PWM out 4 | — | W39 | — | 0.5 | OEM-2-N | — | — | — |
| 20 | Sensor return | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 21 | Sensor return | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | 5V+ VREF out 1 | — | — | — | — | — | — | — | — |
| 3 | Digital out 2 | — | W37 | — | 0.5 | OEM-2-K | — | — | — |
| 4 | Digital out 1 | — | W35 | — | 0.5 | OEM-1-C | — | — | — |
| 5 | Digital I/O 4 | — | — | — | — | — | — | — | — |
| 6 | Digital I/O 2 | — | — | — | — | — | — | — | — |
| 7 | Analog in 8 | — | — | — | — | — | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| C | Air bypass solenoid | — | W35 | — | 0.5 | MS3PROEVOHC-C-4 | — | — | — |
| E | A/C request | — | W54 | — | 0.5 | MS3PROEVOHC-A-32 | — | — | — |
| F | A/C clutch relay | — | W33 | — | 0.5 | MS3PROEVOHC-A-28 | — | — | — |
| G | Neutral switch | — | W55 | — | 0.5 | MS3PROEVOHC-B-20 | — | — | — |
| H | Water temperature switch | — | W56 | — | 0.5 | MS3PROEVOHC-B-29 | — | — | — |
| L | Clutch switch | — | W57 | — | 0.5 | MS3PROEVOHC-C-11 | — | — | — |
| M | Ignition feedback (tacho) | — | W43 | — | 0.5 | MS3PROEVOHC-A-24 | — | — | — |
| N | CAS 2-tooth (G, cam) | — | W23 | — | 0.5 | MS3PROEVOHC-A-26 | — | — | — |
| O | Vehicle speed (mileage sensor) | — | W53 | — | 0.5 | MS3PROEVOHC-B-28 | — | — | — |
| P | CAS ground | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| Q | CAS ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| R | Knock input | — | W25 | — | 0.5 | MS3PROEVOHC-A-31 | — | — | — |
| S | Port air valve | — | W36 | — | 0.5 | MS3PROEVOHC-A-29 | — | — | — |
| T | CAS 24-tooth (NE, crank) | — | W21 | — | 0.5 | MS3PROEVOHC-A-6 | — | — | — |
| U | Ignition select (trailing rotor) | — | W26 | — | 0.5 | MS3PROEVOHC-B-13 | — | — | — |
| V | Ignition leading | — | W27 | — | 0.5 | MS3PROEVOHC-B-14 | — | — | — |
| X | Ignition trailing | — | W28 | — | 0.5 | MS3PROEVOHC-B-15 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | 5V sensor supply | — | W20 | — | 0.5 | MS3PROEVOHC-A-8 | — | — | — |
| B | MAP (pressure) signal | — | W45 | — | 0.5 | MS3PROEVOHC-A-20 | — | — | — |
| C | Sensor ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| D | O2 sensor signal | — | W47 | — | 0.5 | MS3PROEVOHC-A-25 | — | — | — |
| E | Airflow signal (AFM) | — | W44 | — | 0.5 | MS3PROEVOHC-A-19 | — | — | — |
| F | Variable resistor (tuning) | — | W51 | — | 0.5 | MS3PROEVOHC-A-22 | — | — | — |
| G | Throttle position (TPS) | — | W46 | — | 0.5 | MS3PROEVOHC-A-9 | — | — | — |
| H | Atmospheric pressure (ATP) | — | W52 | — | 0.5 | MS3PROEVOHC-A-23 | — | — | — |
| I | Coolant temperature (ECT) | — | W48 | — | 0.5 | MS3PROEVOHC-A-10 | — | — | — |
| J | Inlet air temperature (IAT) | — | W49 | — | 0.5 | MS3PROEVOHC-A-11 | — | — | — |
| K | Turbo control valve (boost) | — | W37 | — | 0.5 | MS3PROEVOHC-C-3 | — | — | — |
| L | Manifold air temperature (MAT) | — | W50 | — | 0.5 | MS3PROEVOHC-A-21 | — | — | — |
| M | Pressure regulator control valve | — | W38 | — | 0.5 | MS3PROEVOHC-A-30 | — | — | — |
| N | EGR valve | — | W39 | — | 0.5 | MS3PROEVOHC-C-2 | — | — | — |
| O | Switching valve | — | W40 | — | 0.5 | MS3PROEVOHC-C-1 | — | — | — |
| P | Relief valve | — | W41 | — | 0.5 | MS3PROEVOHC-A-1 | — | — | — |
| Q | Idle control (BAC) | — | W42 | — | 0.5 | MS3PROEVOHC-A-2 | — | — | — |
| 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 | — | W58 | — | 0.5 | MS3PROEVOHC-C-10 | — | — | — |
| C | Primary injector 2 | — | W31 | — | 0.5 | MS3PROEVOHC-B-1 | — | — | — |
| D | Starter inhibit / fuel pump control | — | W34 | — | 0.5 | MS3PROEVOHC-A-14 | — | — | — |
| E | Primary injector 1 | — | W29 | — | 0.5 | MS3PROEVOHC-A-3 | — | — | — |
| F | Secondary injector 2 | — | W32 | — | 0.5 | MS3PROEVOHC-B-10 | — | — | — |
| G | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| H | Secondary injector 1 | — | W30 | — | 0.5 | MS3PROEVOHC-A-4 | — | — | — |
| 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 | — | — | W10 | — | 0.5 | OEM-1-P | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-1-Q | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-2-C | — | — | — |
| 1 | — | — | W13 | — | 0.5 | MS3PROEVOHC-A-13 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | MS3PROEVOHC-A-18 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | MS3PROEVOHC-C-17 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | MS3PROEVOHC-C-18 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | MS3PROEVOHC-C-19 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | MS3PROEVOHC-C-20 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | MS3PROEVOHC-C-21 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | MS3PROEVOHC-A-15 | — | — | — |
| 1 | — | — | W24 | — | 0.5 | MS3PROEVOHC-A-27 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-3-I | — | — | — |
| 1 | — | — | W2 | — | 0.85 | MS3PROEVOHC-A-35 | — | — | — |
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 | MS3PROEVOHC-B-3 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | MS3PROEVOHC-B-5 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | MS3PROEVOHC-B-7 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | MS3PROEVOHC-B-9 | — | — | — |
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 | MS3PROEVOHC-C-4 | Digital out 1 | low_side_out | single_source | |
| OEM-1-E | A/C request | digital_in | MS3PROEVOHC-A-32 | Digital switched in 1 | digital_in | single_source | |
| OEM-1-F | A/C clutch relay | low_side_out | MS3PROEVOHC-A-28 | Fuel pump relay out | low_side_out | single_source | |
| OEM-1-G | Neutral switch | digital_in | MS3PROEVOHC-B-20 | Digital switched in 2 | digital_in | corroborated | |
| OEM-1-H | Water temperature switch | digital_in | MS3PROEVOHC-B-29 | Digital switched in 3 | digital_in | corroborated | |
| OEM-1-L | Clutch switch | digital_in | MS3PROEVOHC-C-11 | Digital switched in 4 | digital_in | single_source | |
| OEM-1-M | Ignition feedback (tacho) | tacho_out | MS3PROEVOHC-A-24 | Tach out | tacho_out | single_source | |
| OEM-1-N | CAS 2-tooth (G, cam) | trigger_in | MS3PROEVOHC-A-26 | CMP+ | trigger_in | corroborated | |
| OEM-1-O | Vehicle speed (mileage sensor) | digital_in | MS3PROEVOHC-B-28 | Digital frequency in 1 (unconditioned) | digital_in | single_source | |
| OEM-1-P | CAS ground | sensor_ground | MS3PROEVOHC-A-13 + MS3PROEVOHC-A-15 + MS3PROEVOHC-A-18 + MS3PROEVOHC-A-27 + MS3PROEVOHC-C-17 + MS3PROEVOHC-C-18 + MS3PROEVOHC-C-19 + MS3PROEVOHC-C-20 + MS3PROEVOHC-C-21 | Logic Ground + CKP− + Sensor return + CMP− + Sensor return + Sensor return + Sensor return + Sensor return + Sensor return | sensor_ground + trigger_in | corroborated | |
| OEM-1-Q | CAS ground | sensor_ground | MS3PROEVOHC-A-13 + MS3PROEVOHC-A-15 + MS3PROEVOHC-A-18 + MS3PROEVOHC-A-27 + MS3PROEVOHC-C-17 + MS3PROEVOHC-C-18 + MS3PROEVOHC-C-19 + MS3PROEVOHC-C-20 + MS3PROEVOHC-C-21 | Logic Ground + CKP− + Sensor return + CMP− + Sensor return + Sensor return + Sensor return + Sensor return + Sensor return | sensor_ground + trigger_in | corroborated | |
| OEM-1-R | Knock input | knock_in | MS3PROEVOHC-A-31 | Knock in 1 | knock_in | corroborated | |
| OEM-1-S | Port air valve | low_side_out | MS3PROEVOHC-A-29 | PWM out 2 | low_side_out | single_source | |
| OEM-1-T | CAS 24-tooth (NE, crank) | trigger_in | MS3PROEVOHC-A-6 | CKP+ | trigger_in | corroborated | |
| OEM-1-U | Ignition select (trailing rotor) | ignition_out | MS3PROEVOHC-B-13 | Spark out G | ignition_out | corroborated | |
| OEM-1-V | Ignition leading | ignition_out | MS3PROEVOHC-B-14 | Spark out E | ignition_out | corroborated | |
| OEM-1-X | Ignition trailing | ignition_out | MS3PROEVOHC-B-15 | Spark out C | ignition_out | single_source | |
| OEM-2-A | 5V sensor supply | vref | MS3PROEVOHC-A-8 | 5V+ VREF out | vref | single_source | |
| OEM-2-B | MAP (pressure) signal | analog_in | MS3PROEVOHC-A-20 | Analog in 2 | analog_in | single_source | |
| OEM-2-C | Sensor ground | sensor_ground | MS3PROEVOHC-A-13 + MS3PROEVOHC-A-15 + MS3PROEVOHC-A-18 + MS3PROEVOHC-A-27 + MS3PROEVOHC-C-17 + MS3PROEVOHC-C-18 + MS3PROEVOHC-C-19 + MS3PROEVOHC-C-20 + MS3PROEVOHC-C-21 | Logic Ground + CKP− + Sensor return + CMP− + Sensor return + Sensor return + Sensor return + Sensor return + Sensor return | sensor_ground + trigger_in | single_source | |
| OEM-2-D | O2 sensor signal | lambda_nb_in | MS3PROEVOHC-A-25 | O2 in | lambda_nb_in | single_source | |
| OEM-2-E | Airflow signal (AFM) | analog_in | MS3PROEVOHC-A-19 | Analog in 1 | analog_in | single_source | |
| OEM-2-F | Variable resistor (tuning) | analog_in | MS3PROEVOHC-A-22 | Analog In 4 | analog_in | single_source | |
| OEM-2-G | Throttle position (TPS) | analog_in | MS3PROEVOHC-A-9 | TPS in | analog_in | single_source | |
| OEM-2-H | Atmospheric pressure (ATP) | analog_in | MS3PROEVOHC-A-23 | Analog In 5 | analog_in | single_source | |
| OEM-2-I | Coolant temperature (ECT) | temp_in | MS3PROEVOHC-A-10 | MAT in | temp_in | single_source | |
| OEM-2-J | Inlet air temperature (IAT) | temp_in | MS3PROEVOHC-A-11 | CLT in | temp_in | single_source | |
| OEM-2-K | Turbo control valve (boost) | low_side_out | MS3PROEVOHC-C-3 | Digital out 2 | low_side_out | single_source | |
| OEM-2-L | Manifold air temperature (MAT) | temp_in | MS3PROEVOHC-A-21 | Analog in 3 | analog_in | single_source | |
| OEM-2-M | Pressure regulator control valve | low_side_out | MS3PROEVOHC-A-30 | PWM out 3 | low_side_out | single_source | |
| OEM-2-N | EGR valve | low_side_out | MS3PROEVOHC-C-2 | PWM out 4 | low_side_out | single_source | |
| OEM-2-O | Switching valve | low_side_out | MS3PROEVOHC-C-1 | PWM out 5 | low_side_out | single_source | |
| OEM-2-P | Relief valve | low_side_out | MS3PROEVOHC-A-1 | High current out 1 | low_side_out | single_source | |
| OEM-2-Q | Idle control (BAC) | low_side_out | MS3PROEVOHC-A-2 | High current out 2 | low_side_out | single_source | |
| OEM-2-R | Power ground | ground | MS3PROEVOHC-B-3 + MS3PROEVOHC-B-5 + MS3PROEVOHC-B-7 + MS3PROEVOHC-B-9 | Ground + Ground + Ground + Ground | ground | single_source | |
| OEM-3-A | Power ground | ground | MS3PROEVOHC-B-3 + MS3PROEVOHC-B-5 + MS3PROEVOHC-B-7 + MS3PROEVOHC-B-9 | Ground + Ground + Ground + Ground | ground | single_source | |
| OEM-3-B | Starter input | digital_in | MS3PROEVOHC-C-10 | Digital switched in 5 | digital_in | single_source | |
| OEM-3-C | Primary injector 2 | injector_out | MS3PROEVOHC-B-1 | Injector out A | injector_out | single_source | |
| OEM-3-D | Starter inhibit / fuel pump control | low_side_out | MS3PROEVOHC-A-14 | PWM / Idle Out 1 | low_side_out | single_source | |
| OEM-3-E | Primary injector 1 | injector_out | MS3PROEVOHC-A-3 | Injector out J | injector_out | single_source | |
| OEM-3-F | Secondary injector 2 | injector_out | MS3PROEVOHC-B-10 | Injector out F | injector_out | single_source | |
| OEM-3-G | Power ground | ground | MS3PROEVOHC-B-3 + MS3PROEVOHC-B-5 + MS3PROEVOHC-B-7 + MS3PROEVOHC-B-9 | Ground + Ground + Ground + Ground | ground | single_source | |
| OEM-3-H | Secondary injector 1 | injector_out | MS3PROEVOHC-A-4 | Injector out I | injector_out | single_source | |
| OEM-3-I | Ignition power (+12V via main relay) | power_in | MS3PROEVOHC-A-35 | 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 | MS3PROEVOHC-A-35 | 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 | MS3PROEVOHC-B-3 | 0.85 | no route | Ground | — | |
| W7 | SP-GND-1 | MS3PROEVOHC-B-5 | 0.85 | no route | Ground | — | |
| W8 | SP-GND-1 | MS3PROEVOHC-B-7 | 0.85 | no route | Ground | — | |
| W9 | SP-GND-1 | MS3PROEVOHC-B-9 | 0.85 | no route | Ground | — | |
| W10 | OEM-1-P | SP-0V-1 | 0.5 | no route | CAS ground | — | |
| W11 | OEM-1-Q | SP-0V-1 | 0.5 | no route | CAS ground | — | |
| W12 | OEM-2-C | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W13 | SP-0V-1 | MS3PROEVOHC-A-13 | 0.5 | no route | Logic Ground | — | |
| W14 | SP-0V-1 | MS3PROEVOHC-A-18 | 0.5 | no route | Sensor return | — | |
| W15 | SP-0V-1 | MS3PROEVOHC-C-17 | 0.5 | no route | Sensor return | — | |
| W16 | SP-0V-1 | MS3PROEVOHC-C-18 | 0.5 | no route | Sensor return | — | |
| W17 | SP-0V-1 | MS3PROEVOHC-C-19 | 0.5 | no route | Sensor return | — | |
| W18 | SP-0V-1 | MS3PROEVOHC-C-20 | 0.5 | no route | Sensor return | — | |
| W19 | SP-0V-1 | MS3PROEVOHC-C-21 | 0.5 | no route | Sensor return | — | |
| W20 | OEM-2-A | MS3PROEVOHC-A-8 | 0.5 | no route | 5V sensor supply | — | |
| W21 | OEM-1-T | MS3PROEVOHC-A-6 | 0.5 | no route | CAS 24-tooth (NE, crank) | — | |
| W22 | SP-0V-1 | MS3PROEVOHC-A-15 | 0.5 | no route | CKP− | — | |
| W23 | OEM-1-N | MS3PROEVOHC-A-26 | 0.5 | no route | CAS 2-tooth (G, cam) | — | |
| W24 | SP-0V-1 | MS3PROEVOHC-A-27 | 0.5 | no route | CMP− | — | |
| W25 | OEM-1-R | MS3PROEVOHC-A-31 | 0.5 | no route | Knock input | — | |
| W26 | OEM-1-U | MS3PROEVOHC-B-13 | 0.5 | no route | Ignition select (trailing rotor) | — | |
| W27 | OEM-1-V | MS3PROEVOHC-B-14 | 0.5 | no route | Ignition leading | — | |
| W28 | OEM-1-X | MS3PROEVOHC-B-15 | 0.5 | no route | Ignition trailing | — | |
| W29 | OEM-3-E | MS3PROEVOHC-A-3 | 0.5 | no route | Primary injector 1 | — | |
| W30 | OEM-3-H | MS3PROEVOHC-A-4 | 0.5 | no route | Secondary injector 1 | — | |
| W31 | OEM-3-C | MS3PROEVOHC-B-1 | 0.5 | no route | Primary injector 2 | — | |
| W32 | OEM-3-F | MS3PROEVOHC-B-10 | 0.5 | no route | Secondary injector 2 | — | |
| W33 | OEM-1-F | MS3PROEVOHC-A-28 | 0.5 | no route | A/C clutch relay | — | |
| W34 | OEM-3-D | MS3PROEVOHC-A-14 | 0.5 | no route | Starter inhibit / fuel pump control | — | |
| W35 | OEM-1-C | MS3PROEVOHC-C-4 | 0.5 | no route | Air bypass solenoid | — | |
| W36 | OEM-1-S | MS3PROEVOHC-A-29 | 0.5 | no route | Port air valve | — | |
| W37 | OEM-2-K | MS3PROEVOHC-C-3 | 0.5 | no route | Turbo control valve (boost) | — | |
| W38 | OEM-2-M | MS3PROEVOHC-A-30 | 0.5 | no route | Pressure regulator control valve | — | |
| W39 | OEM-2-N | MS3PROEVOHC-C-2 | 0.5 | no route | EGR valve | — | |
| W40 | OEM-2-O | MS3PROEVOHC-C-1 | 0.5 | no route | Switching valve | — | |
| W41 | OEM-2-P | MS3PROEVOHC-A-1 | 0.5 | no route | Relief valve | — | |
| W42 | OEM-2-Q | MS3PROEVOHC-A-2 | 0.5 | no route | Idle control (BAC) | — | |
| W43 | OEM-1-M | MS3PROEVOHC-A-24 | 0.5 | no route | Ignition feedback (tacho) | — | |
| W44 | OEM-2-E | MS3PROEVOHC-A-19 | 0.5 | no route | Airflow signal (AFM) | — | |
| W45 | OEM-2-B | MS3PROEVOHC-A-20 | 0.5 | no route | MAP (pressure) signal | — | |
| W46 | OEM-2-G | MS3PROEVOHC-A-9 | 0.5 | no route | Throttle position (TPS) | — | |
| W47 | OEM-2-D | MS3PROEVOHC-A-25 | 0.5 | no route | O2 sensor signal | — | |
| W48 | OEM-2-I | MS3PROEVOHC-A-10 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W49 | OEM-2-J | MS3PROEVOHC-A-11 | 0.5 | no route | Inlet air temperature (IAT) | — | |
| W50 | OEM-2-L | MS3PROEVOHC-A-21 | 0.5 | no route | Manifold air temperature (MAT) | — | |
| W51 | OEM-2-F | MS3PROEVOHC-A-22 | 0.5 | no route | Variable resistor (tuning) | — | |
| W52 | OEM-2-H | MS3PROEVOHC-A-23 | 0.5 | no route | Atmospheric pressure (ATP) | — | |
| W53 | OEM-1-O | MS3PROEVOHC-B-28 | 0.5 | no route | Vehicle speed (mileage sensor) | — | |
| W54 | OEM-1-E | MS3PROEVOHC-A-32 | 0.5 | no route | A/C request | — | |
| W55 | OEM-1-G | MS3PROEVOHC-B-20 | 0.5 | no route | Neutral switch | — | |
| W56 | OEM-1-H | MS3PROEVOHC-B-29 | 0.5 | no route | Water temperature switch | — | |
| W57 | OEM-1-L | MS3PROEVOHC-C-11 | 0.5 | no route | Clutch switch | — | |
| W58 | OEM-3-B | MS3PROEVOHC-C-10 | 0.5 | no route | Starter input | — |
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 |
|---|---|---|---|
| info | NET_FAMILY | MS3PROEVOHC-A-15 ↔ MS3PROEVOHC-C-17 | MS3PROEVOHC-A-15 "CKP−" [trigger_in] is wired to MS3PROEVOHC-C-17 "Sensor return" [sensor_ground]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | NET_FAMILY | OEM-2-L ↔ MS3PROEVOHC-A-21 | OEM-2-L "Manifold air temperature (MAT)" [temp_in] is wired to MS3PROEVOHC-A-21 "Analog in 3" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
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 EVO+ HC has no battery-constant input; not needed - MS3PROEVOHC-B 19: Digital switched 12V in: not fed (the stock ECU has no ignition-sense pin); feed it from a switched-ignition source
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | AMP EFI: MS3Pro EVO+ / EVO+ HC manual (fw 1.6.1) pinout tables | https://cdn.shopify.com/s/files/1/0960/0014/7754/files/MS3Pro_User_Manual_Firmware_1.6.1_EVO.pdf?v=1760643022 | archive | 2026-10-05 | d5dd8a31822d |
| 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/ | — | — | — |