MX-5 Miata NB1 1999-00 (BP-4W) → AMP EFI MS3Pro EVO+ HC (auto)
MX-5 Miata NB1 1999-00 (BP-4W) — 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 | 64 wires · 9 connectors · 3 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-1-B | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-3-M | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | MS3PROEVOHC-A-35 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-3-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-3-B | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-3-C | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | MS3PROEVOHC-B-3 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | MS3PROEVOHC-B-5 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | MS3PROEVOHC-B-7 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | MS3PROEVOHC-B-9 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-3-F | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-0V-1 | MS3PROEVOHC-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | MS3PROEVOHC-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | MS3PROEVOHC-C-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | SP-0V-1 | MS3PROEVOHC-C-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | MS3PROEVOHC-C-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | MS3PROEVOHC-C-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | SP-0V-1 | MS3PROEVOHC-C-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-2-I | MS3PROEVOHC-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-2-J | MS3PROEVOHC-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | SP-0V-1 | MS3PROEVOHC-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-2-H | MS3PROEVOHC-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | SP-0V-1 | MS3PROEVOHC-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-2-F | MS3PROEVOHC-A-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-3-G | MS3PROEVOHC-B-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-3-H | MS3PROEVOHC-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-3-W | MS3PROEVOHC-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-3-X | MS3PROEVOHC-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-3-Y | MS3PROEVOHC-B-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-3-Z | MS3PROEVOHC-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-1-I | MS3PROEVOHC-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-1-R | MS3PROEVOHC-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-1-S | MS3PROEVOHC-C-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-3-N | MS3PROEVOHC-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-1-U | MS3PROEVOHC-C-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-3-V | MS3PROEVOHC-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-3-O | MS3PROEVOHC-C-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-1-E | MS3PROEVOHC-C-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-1-O | MS3PROEVOHC-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-1-Q | MS3PROEVOHC-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-2-M | MS3PROEVOHC-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-2-N | MS3PROEVOHC-B-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-2-O | MS3PROEVOHC-B-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-2-P | MS3PROEVOHC-B-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-3-L | MS3PROEVOHC-B-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-3-Q | MS3PROEVOHC-B-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-3-T | MS3PROEVOHC-B-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-3-U | MS3PROEVOHC-B-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-2-K | MS3PROEVOHC-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-2-L | MS3PROEVOHC-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-3-E | MS3PROEVOHC-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-2-C | MS3PROEVOHC-A-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-3-J | MS3PROEVOHC-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-2-E | MS3PROEVOHC-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-2-B | MS3PROEVOHC-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-2-A | MS3PROEVOHC-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-3-K | MS3PROEVOHC-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-3-S | MS3PROEVOHC-A-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-2-D | MS3PROEVOHC-B-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-1-F | MS3PROEVOHC-A-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-1-G | MS3PROEVOHC-B-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-1-P | MS3PROEVOHC-B-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W63 | OEM-1-V | MS3PROEVOHC-C-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W64 | OEM-3-I | 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-35 | MS3PROEVOHC-A-13 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | MS3PROEVOHC-A-35 | MS3PROEVOHC-B-3 | open (OL) | +12 V supply must not touch power ground | |
| 3 | MS3PROEVOHC-A-8 | MS3PROEVOHC-A-13 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 4 | MS3PROEVOHC-A-8 | MS3PROEVOHC-B-3 | open (OL) | 5 V sensor reference must not touch power ground | |
| 5 | MS3PROEVOHC-A-35 | MS3PROEVOHC-A-8 | open (OL) | +12 V supply must not touch 5 V sensor reference |
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 | — | W39 | — | 0.5 | OEM-1-O | — | — | — |
| 10 | MAT in | — | W54 | — | 0.5 | OEM-2-E | — | — | — |
| 11 | CLT in | — | W55 | — | 0.5 | OEM-2-B | — | — | — |
| 12 | Analog In 6 | — | — | — | — | — | — | — | — |
| 13 | Logic Ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 14 | PWM / Idle Out 1 | — | W32 | — | 0.5 | OEM-1-R | — | — | — |
| 15 | CKP− | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Ground Shield Drain | — | — | — | — | — | — | — | — |
| 17 | Analog In 7 | — | — | — | — | — | — | — | — |
| 18 | Sensor return | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Analog in 1 | — | W50 | — | 0.5 | OEM-2-L | — | — | — |
| 2 | High current out 2 | — | W40 | — | 0.5 | OEM-1-Q | — | — | — |
| 20 | Analog in 2 | — | W53 | — | 0.5 | OEM-3-J | — | — | — |
| 21 | Analog in 3 | — | W56 | — | 0.5 | OEM-2-A | — | — | — |
| 22 | Analog In 4 | — | W57 | — | 0.5 | OEM-3-K | — | — | — |
| 23 | Analog In 5 | — | W58 | — | 0.5 | OEM-3-S | — | — | — |
| 24 | Tach out | — | W49 | — | 0.5 | OEM-2-K | — | — | — |
| 25 | O2 in | — | W52 | — | 0.5 | OEM-2-C | — | — | — |
| 26 | CMP+ | — | W22 | — | 0.5 | OEM-2-H | — | — | — |
| 27 | CMP− | — | W23 | — | 0.5 | SP-0V-1 | — | — | — |
| 28 | Fuel pump relay out | — | W31 | — | 0.5 | OEM-1-I | — | — | — |
| 29 | PWM out 2 | — | W34 | — | 0.5 | OEM-3-N | — | — | — |
| 3 | Injector out J | — | W27 | — | 0.5 | OEM-3-W | — | — | — |
| 30 | PWM out 3 | — | W36 | — | 0.5 | OEM-3-V | — | — | — |
| 31 | Knock in 1 | — | W24 | — | 0.5 | OEM-2-F | — | — | — |
| 32 | Digital switched in 1 | — | W60 | — | 0.5 | OEM-1-F | — | — | — |
| 33 | CAN L | — | — | — | — | — | — | — | — |
| 34 | CAN H | — | — | — | — | — | — | — | — |
| 35 | 12V+ switched power in | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Injector out I | — | W28 | — | 0.5 | OEM-3-X | — | — | — |
| 5 | High current out 3 | — | W41 | — | 0.5 | OEM-2-M | — | — | — |
| 6 | CKP+ | — | W20 | — | 0.5 | OEM-2-J | — | — | — |
| 7 | Knock In 2 | — | — | — | — | — | — | — | — |
| 8 | 5V+ VREF out | — | W19 | — | 0.5 | OEM-2-I | — | — | — |
| 9 | TPS in | — | W51 | — | 0.5 | OEM-3-E | — | — | — |
MS3PROEVOHC-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector out A | — | W29 | — | 0.5 | OEM-3-Y | — | — | — |
| 10 | Injector out F | — | W30 | — | 0.5 | OEM-3-Z | — | — | — |
| 11 | Injector out G | — | W42 | — | 0.5 | OEM-2-N | — | — | — |
| 12 | Injector out H | — | W43 | — | 0.5 | OEM-2-O | — | — | — |
| 13 | Spark out G | — | W25 | — | 0.5 | OEM-3-G | — | — | — |
| 14 | Spark out E | — | W26 | — | 0.5 | OEM-3-H | — | — | — |
| 15 | Spark out C | — | — | — | — | — | — | — | — |
| 16 | Spark out H | — | — | — | — | — | — | — | — |
| 17 | Digital frequency in 2 (Hall) | — | — | — | — | — | — | — | — |
| 18 | Ground Shield Drain | — | — | — | — | — | — | — | — |
| 19 | Digital switched 12V in | — | — | — | — | — | — | — | — |
| 2 | Injector out B | — | W44 | — | 0.5 | OEM-2-P | — | — | — |
| 20 | Digital switched in 2 | — | W61 | — | 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) | — | W59 | — | 0.5 | OEM-2-D | — | — | — |
| 29 | Digital switched in 3 | — | W62 | — | 0.5 | OEM-1-P | — | — | — |
| 3 | Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 30 | Stepper IAC out 1B | — | W48 | — | 0.5 | OEM-3-U | — | — | — |
| 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 | — | W45 | — | 0.5 | OEM-3-L | — | — | — |
| 5 | Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 6 | Injector out D | — | W46 | — | 0.5 | OEM-3-Q | — | — | — |
| 7 | Ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 8 | Injector out E | — | W47 | — | 0.5 | OEM-3-T | — | — | — |
| 9 | Ground | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
MS3PROEVOHC-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | PWM out 5 | — | W38 | — | 0.5 | OEM-1-E | — | — | — |
| 10 | Digital switched in 5 | — | W64 | — | 0.5 | OEM-3-I | — | — | — |
| 11 | Digital switched in 4 | — | W63 | — | 0.5 | OEM-1-V | — | — | — |
| 12 | Digital I/O 5 | — | — | — | — | — | — | — | — |
| 13 | Digital I/O 3 | — | — | — | — | — | — | — | — |
| 14 | Digital I/O 1 | — | — | — | — | — | — | — | — |
| 15 | 5V+ VREF out 2 | — | — | — | — | — | — | — | — |
| 17 | Sensor return | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 18 | Sensor return | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Sensor return | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | PWM out 4 | — | W37 | — | 0.5 | OEM-3-O | — | — | — |
| 20 | Sensor return | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 21 | Sensor return | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | 5V+ VREF out 1 | — | — | — | — | — | — | — | — |
| 3 | Digital out 2 | — | W35 | — | 0.5 | OEM-1-U | — | — | — |
| 4 | Digital out 1 | — | W33 | — | 0.5 | OEM-1-S | — | — | — |
| 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 |
|---|---|---|---|---|---|---|---|---|---|
| A | Constant +12V | — | — | — | — | — | — | — | — |
| B | ECU power +14V (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| E | Malfunction indicator lamp (MIL) | — | W38 | — | 0.5 | MS3PROEVOHC-C-1 | — | — | — |
| F | Brake switch | — | W60 | — | 0.5 | MS3PROEVOHC-A-32 | — | — | — |
| G | Power steering pressure switch | — | W61 | — | 0.5 | MS3PROEVOHC-B-20 | — | — | — |
| I | Condenser fan relay | — | W31 | — | 0.5 | MS3PROEVOHC-A-28 | — | — | — |
| O | Alternator control | — | W39 | — | 0.5 | MS3PROEVOHC-A-1 | — | — | — |
| P | A/C request | — | W62 | — | 0.5 | MS3PROEVOHC-B-29 | — | — | — |
| Q | Charge lamp | — | W40 | — | 0.5 | MS3PROEVOHC-A-2 | — | — | — |
| R | Cooling fan relay | — | W32 | — | 0.5 | MS3PROEVOHC-A-14 | — | — | — |
| S | A/C clutch relay | — | W33 | — | 0.5 | MS3PROEVOHC-C-4 | — | — | — |
| U | Front O2 heater | — | W35 | — | 0.5 | MS3PROEVOHC-C-3 | — | — | — |
| V | Neutral switch | — | W63 | — | 0.5 | MS3PROEVOHC-C-11 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Fuel tank pressure | — | W56 | — | 0.5 | MS3PROEVOHC-A-21 | — | — | — |
| B | Intake air temperature (IAT) | — | W55 | — | 0.5 | MS3PROEVOHC-A-11 | — | — | — |
| C | Front O2 signal | — | W52 | — | 0.5 | MS3PROEVOHC-A-25 | — | — | — |
| D | Vehicle speed | — | W59 | — | 0.5 | MS3PROEVOHC-B-28 | — | — | — |
| E | Coolant temperature (ECT) | — | W54 | — | 0.5 | MS3PROEVOHC-A-10 | — | — | — |
| F | Knock sensor | — | W24 | — | 0.5 | MS3PROEVOHC-A-31 | — | — | — |
| H | Cam position (CMP) | — | W22 | — | 0.5 | MS3PROEVOHC-A-26 | — | — | — |
| I | +5V sensor supply | — | W19 | — | 0.5 | MS3PROEVOHC-A-8 | — | — | — |
| J | Crank position (CKP) | — | W20 | — | 0.5 | MS3PROEVOHC-A-6 | — | — | — |
| K | Tachometer output | — | W49 | — | 0.5 | MS3PROEVOHC-A-24 | — | — | — |
| L | Mass air flow (MAF) | — | W50 | — | 0.5 | MS3PROEVOHC-A-19 | — | — | — |
| M | EGR valve | — | W41 | — | 0.5 | MS3PROEVOHC-A-5 | — | — | — |
| N | EGR valve | — | W42 | — | 0.5 | MS3PROEVOHC-B-11 | — | — | — |
| O | EGR valve | — | W43 | — | 0.5 | MS3PROEVOHC-B-12 | — | — | — |
| P | EGR valve | — | W44 | — | 0.5 | MS3PROEVOHC-B-2 | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| C | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| E | Throttle position (TPS) | — | W51 | — | 0.5 | MS3PROEVOHC-A-9 | — | — | — |
| F | Signal ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| G | Ignition 1 (coils 1+4, wasted spark) | — | W25 | — | 0.5 | MS3PROEVOHC-B-13 | — | — | — |
| H | Ignition 2 (coils 2+3, wasted spark) | — | W26 | — | 0.5 | MS3PROEVOHC-B-14 | — | — | — |
| I | Clutch switch | — | W64 | — | 0.5 | MS3PROEVOHC-C-10 | — | — | — |
| J | Rear O2 signal | — | W53 | — | 0.5 | MS3PROEVOHC-A-20 | — | — | — |
| K | Fuel level | — | W57 | — | 0.5 | MS3PROEVOHC-A-22 | — | — | — |
| L | Evap purge solenoid | — | W45 | — | 0.5 | MS3PROEVOHC-B-4 | — | — | — |
| M | ISC valve +14V feed | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| N | Fuel pump relay | — | W34 | — | 0.5 | MS3PROEVOHC-A-29 | — | — | — |
| O | ISC valve low side | — | W37 | — | 0.5 | MS3PROEVOHC-C-2 | — | — | — |
| Q | VICS solenoid (intake butterflies) | — | W46 | — | 0.5 | MS3PROEVOHC-B-6 | — | — | — |
| S | EGR boost sensor | — | W58 | — | 0.5 | MS3PROEVOHC-A-23 | — | — | — |
| T | EGR boost solenoid | — | W47 | — | 0.5 | MS3PROEVOHC-B-8 | — | — | — |
| U | Canister drain cut valve (CDCV) | — | W48 | — | 0.5 | MS3PROEVOHC-B-30 | — | — | — |
| V | Rear O2 heater | — | W36 | — | 0.5 | MS3PROEVOHC-A-30 | — | — | — |
| W | Injector 1 | — | W27 | — | 0.5 | MS3PROEVOHC-A-3 | — | — | — |
| X | Injector 2 | — | W28 | — | 0.5 | MS3PROEVOHC-A-4 | — | — | — |
| Y | Injector 3 | — | W29 | — | 0.5 | MS3PROEVOHC-B-1 | — | — | — |
| Z | Injector 4 | — | W30 | — | 0.5 | MS3PROEVOHC-B-10 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W11 | — | 0.5 | OEM-3-F | — | — | — |
| 1 | — | — | W12 | — | 0.5 | MS3PROEVOHC-A-13 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | MS3PROEVOHC-A-18 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | MS3PROEVOHC-C-17 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | MS3PROEVOHC-C-18 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | MS3PROEVOHC-C-19 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | MS3PROEVOHC-C-20 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | MS3PROEVOHC-C-21 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | MS3PROEVOHC-A-15 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | MS3PROEVOHC-A-27 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-1-B | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-3-M | — | — | — |
| 1 | — | — | W3 | — | 0.85 | MS3PROEVOHC-A-35 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-3-B | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-3-C | — | — | — |
| 1 | — | — | W7 | — | 0.85 | MS3PROEVOHC-B-3 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | MS3PROEVOHC-B-5 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | MS3PROEVOHC-B-7 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | MS3PROEVOHC-B-9 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-1-A | Constant +12V | power_in | — | — | — | single_source | |
| OEM-1-B | ECU power +14V (main relay) | power_in | MS3PROEVOHC-A-35 | 12V+ switched power in | power_in | single_source | |
| OEM-1-E | Malfunction indicator lamp (MIL) | low_side_out | MS3PROEVOHC-C-1 | PWM out 5 | low_side_out | single_source | |
| OEM-1-F | Brake switch | digital_in | MS3PROEVOHC-A-32 | Digital switched in 1 | digital_in | single_source | |
| OEM-1-G | Power steering pressure switch | digital_in | MS3PROEVOHC-B-20 | Digital switched in 2 | digital_in | single_source | |
| OEM-1-I | Condenser fan relay | low_side_out | MS3PROEVOHC-A-28 | Fuel pump relay out | low_side_out | single_source | |
| OEM-1-O | Alternator control | low_side_out | MS3PROEVOHC-A-1 | High current out 1 | low_side_out | single_source | |
| OEM-1-P | A/C request | digital_in | MS3PROEVOHC-B-29 | Digital switched in 3 | digital_in | single_source | |
| OEM-1-Q | Charge lamp | low_side_out | MS3PROEVOHC-A-2 | High current out 2 | low_side_out | single_source | |
| OEM-1-R | Cooling fan relay | low_side_out | MS3PROEVOHC-A-14 | PWM / Idle Out 1 | low_side_out | single_source | |
| OEM-1-S | A/C clutch relay | low_side_out | MS3PROEVOHC-C-4 | Digital out 1 | low_side_out | single_source | |
| OEM-1-U | Front O2 heater | low_side_out | MS3PROEVOHC-C-3 | Digital out 2 | low_side_out | single_source | |
| OEM-1-V | Neutral switch | digital_in | MS3PROEVOHC-C-11 | Digital switched in 4 | digital_in | single_source | |
| OEM-2-A | Fuel tank pressure | analog_in | MS3PROEVOHC-A-21 | Analog in 3 | analog_in | single_source | |
| OEM-2-B | Intake air temperature (IAT) | temp_in | MS3PROEVOHC-A-11 | CLT in | temp_in | single_source | |
| OEM-2-C | Front O2 signal | lambda_nb_in | MS3PROEVOHC-A-25 | O2 in | lambda_nb_in | single_source | |
| OEM-2-D | Vehicle speed | digital_in | MS3PROEVOHC-B-28 | Digital frequency in 1 (unconditioned) | digital_in | single_source | |
| OEM-2-E | Coolant temperature (ECT) | temp_in | MS3PROEVOHC-A-10 | MAT in | temp_in | single_source | |
| OEM-2-F | Knock sensor | knock_in | MS3PROEVOHC-A-31 | Knock in 1 | knock_in | single_source | |
| OEM-2-H | Cam position (CMP) | trigger_in | MS3PROEVOHC-A-26 | CMP+ | trigger_in | single_source | |
| OEM-2-I | +5V sensor supply | vref | MS3PROEVOHC-A-8 | 5V+ VREF out | vref | single_source | |
| OEM-2-J | Crank position (CKP) | trigger_in | MS3PROEVOHC-A-6 | CKP+ | trigger_in | single_source | |
| OEM-2-K | Tachometer output | tacho_out | MS3PROEVOHC-A-24 | Tach out | tacho_out | single_source | |
| OEM-2-L | Mass air flow (MAF) | analog_in | MS3PROEVOHC-A-19 | Analog in 1 | analog_in | single_source | |
| OEM-2-M | EGR valve | low_side_out | MS3PROEVOHC-A-5 | High current out 3 | low_side_out | single_source | |
| OEM-2-N | EGR valve | low_side_out | MS3PROEVOHC-B-11 | Injector out G | injector_out | single_source | |
| OEM-2-O | EGR valve | low_side_out | MS3PROEVOHC-B-12 | Injector out H | injector_out | single_source | |
| OEM-2-P | EGR valve | low_side_out | MS3PROEVOHC-B-2 | Injector out B | injector_out | 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 | Power ground | ground | MS3PROEVOHC-B-3 + MS3PROEVOHC-B-5 + MS3PROEVOHC-B-7 + MS3PROEVOHC-B-9 | Ground + Ground + Ground + Ground | ground | single_source | |
| OEM-3-C | Power ground | ground | MS3PROEVOHC-B-3 + MS3PROEVOHC-B-5 + MS3PROEVOHC-B-7 + MS3PROEVOHC-B-9 | Ground + Ground + Ground + Ground | ground | single_source | |
| OEM-3-E | Throttle position (TPS) | analog_in | MS3PROEVOHC-A-9 | TPS in | analog_in | single_source | |
| OEM-3-F | Signal 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-3-G | Ignition 1 (coils 1+4, wasted spark) | ignition_out | MS3PROEVOHC-B-13 | Spark out G | ignition_out | single_source | |
| OEM-3-H | Ignition 2 (coils 2+3, wasted spark) | ignition_out | MS3PROEVOHC-B-14 | Spark out E | ignition_out | single_source | |
| OEM-3-I | Clutch switch | digital_in | MS3PROEVOHC-C-10 | Digital switched in 5 | digital_in | single_source | |
| OEM-3-J | Rear O2 signal | lambda_nb_in | MS3PROEVOHC-A-20 | Analog in 2 | analog_in | single_source | |
| OEM-3-K | Fuel level | analog_in | MS3PROEVOHC-A-22 | Analog In 4 | analog_in | single_source | |
| OEM-3-L | Evap purge solenoid | low_side_out | MS3PROEVOHC-B-4 | Injector out C | injector_out | single_source | |
| OEM-3-M | ISC valve +14V feed | power_in | MS3PROEVOHC-A-35 | 12V+ switched power in | power_in | single_source | |
| OEM-3-N | Fuel pump relay | low_side_out | MS3PROEVOHC-A-29 | PWM out 2 | low_side_out | single_source | |
| OEM-3-O | ISC valve low side | low_side_out | MS3PROEVOHC-C-2 | PWM out 4 | low_side_out | single_source | |
| OEM-3-Q | VICS solenoid (intake butterflies) | low_side_out | MS3PROEVOHC-B-6 | Injector out D | injector_out | single_source | |
| OEM-3-S | EGR boost sensor | analog_in | MS3PROEVOHC-A-23 | Analog In 5 | analog_in | single_source | |
| OEM-3-T | EGR boost solenoid | low_side_out | MS3PROEVOHC-B-8 | Injector out E | injector_out | single_source | |
| OEM-3-U | Canister drain cut valve (CDCV) | low_side_out | MS3PROEVOHC-B-30 | Stepper IAC out 1B | hbridge_out | single_source | |
| OEM-3-V | Rear O2 heater | low_side_out | MS3PROEVOHC-A-30 | PWM out 3 | low_side_out | single_source | |
| OEM-3-W | Injector 1 | injector_out | MS3PROEVOHC-A-3 | Injector out J | injector_out | single_source | |
| OEM-3-X | Injector 2 | injector_out | MS3PROEVOHC-A-4 | Injector out I | injector_out | single_source | |
| OEM-3-Y | Injector 3 | injector_out | MS3PROEVOHC-B-1 | Injector out A | injector_out | single_source | |
| OEM-3-Z | Injector 4 | injector_out | MS3PROEVOHC-B-10 | Injector out F | injector_out | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-1-B | SP-14V-1 | 0.85 | no route | ECU power +14V (main relay) | — | |
| W2 | OEM-3-M | SP-14V-1 | 0.85 | no route | ISC valve +14V feed | — | |
| W3 | SP-14V-1 | MS3PROEVOHC-A-35 | 0.85 | no route | 12V+ switched power in | — | |
| W4 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W5 | OEM-3-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W6 | OEM-3-C | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | SP-GND-1 | MS3PROEVOHC-B-3 | 0.85 | no route | Ground | — | |
| W8 | SP-GND-1 | MS3PROEVOHC-B-5 | 0.85 | no route | Ground | — | |
| W9 | SP-GND-1 | MS3PROEVOHC-B-7 | 0.85 | no route | Ground | — | |
| W10 | SP-GND-1 | MS3PROEVOHC-B-9 | 0.85 | no route | Ground | — | |
| W11 | OEM-3-F | SP-0V-1 | 0.5 | no route | Signal ground | — | |
| W12 | SP-0V-1 | MS3PROEVOHC-A-13 | 0.5 | no route | Logic Ground | — | |
| W13 | SP-0V-1 | MS3PROEVOHC-A-18 | 0.5 | no route | Sensor return | — | |
| W14 | SP-0V-1 | MS3PROEVOHC-C-17 | 0.5 | no route | Sensor return | — | |
| W15 | SP-0V-1 | MS3PROEVOHC-C-18 | 0.5 | no route | Sensor return | — | |
| W16 | SP-0V-1 | MS3PROEVOHC-C-19 | 0.5 | no route | Sensor return | — | |
| W17 | SP-0V-1 | MS3PROEVOHC-C-20 | 0.5 | no route | Sensor return | — | |
| W18 | SP-0V-1 | MS3PROEVOHC-C-21 | 0.5 | no route | Sensor return | — | |
| W19 | OEM-2-I | MS3PROEVOHC-A-8 | 0.5 | no route | +5V sensor supply | — | |
| W20 | OEM-2-J | MS3PROEVOHC-A-6 | 0.5 | no route | Crank position (CKP) | — | |
| W21 | SP-0V-1 | MS3PROEVOHC-A-15 | 0.5 | no route | CKP− | — | |
| W22 | OEM-2-H | MS3PROEVOHC-A-26 | 0.5 | no route | Cam position (CMP) | — | |
| W23 | SP-0V-1 | MS3PROEVOHC-A-27 | 0.5 | no route | CMP− | — | |
| W24 | OEM-2-F | MS3PROEVOHC-A-31 | 0.5 | no route | Knock sensor | — | |
| W25 | OEM-3-G | MS3PROEVOHC-B-13 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W26 | OEM-3-H | MS3PROEVOHC-B-14 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W27 | OEM-3-W | MS3PROEVOHC-A-3 | 0.5 | no route | Injector 1 | — | |
| W28 | OEM-3-X | MS3PROEVOHC-A-4 | 0.5 | no route | Injector 2 | — | |
| W29 | OEM-3-Y | MS3PROEVOHC-B-1 | 0.5 | no route | Injector 3 | — | |
| W30 | OEM-3-Z | MS3PROEVOHC-B-10 | 0.5 | no route | Injector 4 | — | |
| W31 | OEM-1-I | MS3PROEVOHC-A-28 | 0.5 | no route | Condenser fan relay | — | |
| W32 | OEM-1-R | MS3PROEVOHC-A-14 | 0.5 | no route | Cooling fan relay | — | |
| W33 | OEM-1-S | MS3PROEVOHC-C-4 | 0.5 | no route | A/C clutch relay | — | |
| W34 | OEM-3-N | MS3PROEVOHC-A-29 | 0.5 | no route | Fuel pump relay | — | |
| W35 | OEM-1-U | MS3PROEVOHC-C-3 | 0.5 | no route | Front O2 heater | — | |
| W36 | OEM-3-V | MS3PROEVOHC-A-30 | 0.5 | no route | Rear O2 heater | — | |
| W37 | OEM-3-O | MS3PROEVOHC-C-2 | 0.5 | no route | ISC valve low side | — | |
| W38 | OEM-1-E | MS3PROEVOHC-C-1 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W39 | OEM-1-O | MS3PROEVOHC-A-1 | 0.5 | no route | Alternator control | — | |
| W40 | OEM-1-Q | MS3PROEVOHC-A-2 | 0.5 | no route | Charge lamp | — | |
| W41 | OEM-2-M | MS3PROEVOHC-A-5 | 0.5 | no route | EGR valve | — | |
| W42 | OEM-2-N | MS3PROEVOHC-B-11 | 0.5 | no route | EGR valve | — | |
| W43 | OEM-2-O | MS3PROEVOHC-B-12 | 0.5 | no route | EGR valve | — | |
| W44 | OEM-2-P | MS3PROEVOHC-B-2 | 0.5 | no route | EGR valve | — | |
| W45 | OEM-3-L | MS3PROEVOHC-B-4 | 0.5 | no route | Evap purge solenoid | — | |
| W46 | OEM-3-Q | MS3PROEVOHC-B-6 | 0.5 | no route | VICS solenoid (intake butterflies) | — | |
| W47 | OEM-3-T | MS3PROEVOHC-B-8 | 0.5 | no route | EGR boost solenoid | — | |
| W48 | OEM-3-U | MS3PROEVOHC-B-30 | 0.5 | no route | Canister drain cut valve (CDCV) | — | |
| W49 | OEM-2-K | MS3PROEVOHC-A-24 | 0.5 | no route | Tachometer output | — | |
| W50 | OEM-2-L | MS3PROEVOHC-A-19 | 0.5 | no route | Mass air flow (MAF) | — | |
| W51 | OEM-3-E | MS3PROEVOHC-A-9 | 0.5 | no route | Throttle position (TPS) | — | |
| W52 | OEM-2-C | MS3PROEVOHC-A-25 | 0.5 | no route | Front O2 signal | — | |
| W53 | OEM-3-J | MS3PROEVOHC-A-20 | 0.5 | no route | Rear O2 signal | — | |
| W54 | OEM-2-E | MS3PROEVOHC-A-10 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W55 | OEM-2-B | MS3PROEVOHC-A-11 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W56 | OEM-2-A | MS3PROEVOHC-A-21 | 0.5 | no route | Fuel tank pressure | — | |
| W57 | OEM-3-K | MS3PROEVOHC-A-22 | 0.5 | no route | Fuel level | — | |
| W58 | OEM-3-S | MS3PROEVOHC-A-23 | 0.5 | no route | EGR boost sensor | — | |
| W59 | OEM-2-D | MS3PROEVOHC-B-28 | 0.5 | no route | Vehicle speed | — | |
| W60 | OEM-1-F | MS3PROEVOHC-A-32 | 0.5 | no route | Brake switch | — | |
| W61 | OEM-1-G | MS3PROEVOHC-B-20 | 0.5 | no route | Power steering pressure switch | — | |
| W62 | OEM-1-P | MS3PROEVOHC-B-29 | 0.5 | no route | A/C request | — | |
| W63 | OEM-1-V | MS3PROEVOHC-C-11 | 0.5 | no route | Neutral switch | — | |
| W64 | OEM-3-I | MS3PROEVOHC-C-10 | 0.5 | no route | Clutch switch | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 174514-6 | TE | AMP Multilock .040/.070 hybrid 16-pin female harness plug (Miata NB1 ECU) | 1.000 | ea |
| connector | 174515-6 | TE | AMP Multilock .040/.070 hybrid 22-pin female harness plug (Miata NA/NB ECU) | 1.000 | ea |
| connector | 174516-6 | TE | AMP Multilock .040/.070 hybrid 26-pin female harness plug (Miata NA/NB ECU) | 1.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (8)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-3-U ↔ MS3PROEVOHC-B-30 | OEM-3-U "Canister drain cut valve (CDCV)" [low_side_out] is wired to MS3PROEVOHC-B-30 "Stepper IAC out 1B" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| 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-N ↔ MS3PROEVOHC-B-11 | OEM-2-N "EGR valve" [low_side_out] is wired to MS3PROEVOHC-B-11 "Injector out G" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-O ↔ MS3PROEVOHC-B-12 | OEM-2-O "EGR valve" [low_side_out] is wired to MS3PROEVOHC-B-12 "Injector out H" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-P ↔ MS3PROEVOHC-B-2 | OEM-2-P "EGR valve" [low_side_out] is wired to MS3PROEVOHC-B-2 "Injector out B" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-3-L ↔ MS3PROEVOHC-B-4 | OEM-3-L "Evap purge solenoid" [low_side_out] is wired to MS3PROEVOHC-B-4 "Injector out C" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-3-Q ↔ MS3PROEVOHC-B-6 | OEM-3-Q "VICS solenoid (intake butterflies)" [low_side_out] is wired to MS3PROEVOHC-B-6 "Injector out D" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-3-T ↔ MS3PROEVOHC-B-8 | OEM-3-T "EGR boost solenoid" [low_side_out] is wired to MS3PROEVOHC-B-8 "Injector out E" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-1-A | 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-1 A: 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 | Link G4X MX5NB1X install manual (NB1 1999-00) | https://linkecu.com/documentation/MX5XNB1.pdf | archive | 2026-10-05 | 2e36c91270cc |