Honda NSX NA1 1991-2005 (C30A) → AMP EFI MS3Pro EVO+ HC (auto)
Honda NSX NA1 1991-2005 (C30A) — AMP EFI — MS3Pro EVO+ HC
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-07
Before you start
| Status | draft · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | none |
| Size of the job | 81 wires · 12 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-A-25 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-C-1 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | MS3PROEVOHC-A-35 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-A-23 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-A-24 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-B-2 | 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-A-26 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-B-10 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-B-12 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-B-14 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-B-16 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-D-21 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-D-22 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | SP-0V-1 | MS3PROEVOHC-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | SP-0V-1 | MS3PROEVOHC-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | SP-0V-1 | MS3PROEVOHC-C-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | SP-0V-1 | MS3PROEVOHC-C-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | SP-0V-1 | MS3PROEVOHC-C-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | SP-0V-1 | MS3PROEVOHC-C-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | SP-0V-1 | MS3PROEVOHC-C-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-D-18 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-D-19 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-D-20 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | SP-5V1-1 | MS3PROEVOHC-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-B-15 | MS3PROEVOHC-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | SP-0V-1 | MS3PROEVOHC-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-B-13 | MS3PROEVOHC-B-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | SP-0V-1 | MS3PROEVOHC-B-35 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-B-11 | MS3PROEVOHC-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | SP-0V-1 | MS3PROEVOHC-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-B-9 | MS3PROEVOHC-B-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-D-4 | MS3PROEVOHC-A-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-D-3 | MS3PROEVOHC-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-A-21 | MS3PROEVOHC-B-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-A-22 | MS3PROEVOHC-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-B-8 | MS3PROEVOHC-B-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-B-6 | MS3PROEVOHC-B-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-B-4 | MS3PROEVOHC-B-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-B-3 | MS3PROEVOHC-B-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A-1 | MS3PROEVOHC-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A-3 | MS3PROEVOHC-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-A-5 | MS3PROEVOHC-B-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-A-2 | MS3PROEVOHC-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-A-4 | MS3PROEVOHC-B-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-A-6 | MS3PROEVOHC-B-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-A-8 | MS3PROEVOHC-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-A-15 | MS3PROEVOHC-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-A-18 | MS3PROEVOHC-C-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-A-7 | MS3PROEVOHC-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-5-F5 | MS3PROEVOHC-B-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-5-F7 | MS3PROEVOHC-B-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-A-10 | MS3PROEVOHC-C-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-A-12 | MS3PROEVOHC-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-A-11 | MS3PROEVOHC-C-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-A-13 | MS3PROEVOHC-C-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-A-14 | MS3PROEVOHC-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-A-20 | MS3PROEVOHC-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-A-9 | MS3PROEVOHC-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W63 | OEM-C-4 | MS3PROEVOHC-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W64 | OEM-D-17 | MS3PROEVOHC-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W65 | OEM-D-11 | MS3PROEVOHC-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W66 | OEM-D-14 | MS3PROEVOHC-A-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W67 | OEM-D-16 | MS3PROEVOHC-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W68 | OEM-D-13 | MS3PROEVOHC-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W69 | OEM-D-15 | MS3PROEVOHC-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W70 | OEM-D-12 | MS3PROEVOHC-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W71 | OEM-C-2 | MS3PROEVOHC-B-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W72 | OEM-D-9 | MS3PROEVOHC-B-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W73 | OEM-5-F2 | MS3PROEVOHC-A-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W74 | OEM-5-F4 | MS3PROEVOHC-B-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W75 | OEM-B-7 | MS3PROEVOHC-B-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W76 | OEM-C-11 | MS3PROEVOHC-C-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W77 | OEM-C-3 | MS3PROEVOHC-C-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W78 | OEM-C-5 | MS3PROEVOHC-B-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W79 | OEM-C-7 | MS3PROEVOHC-B-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W80 | OEM-C-9 | MS3PROEVOHC-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W81 | OEM-D-8 | MS3PROEVOHC-A-23 | 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-13 | MS3PROEVOHC-A-8 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 3 | MS3PROEVOHC-A-35 | MS3PROEVOHC-A-8 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 4 | MS3PROEVOHC-B-3 | MS3PROEVOHC-A-35 | open (OL) | power ground must not touch +12 V supply | |
| 5 | MS3PROEVOHC-B-3 | MS3PROEVOHC-A-8 | open (OL) | power ground 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 | — | W60 | — | 0.5 | OEM-A-14 | — | — | — |
| 10 | MAT in | — | W68 | — | 0.5 | OEM-D-13 | — | — | — |
| 11 | CLT in | — | W69 | — | 0.5 | OEM-D-15 | — | — | — |
| 12 | Analog In 6 | — | — | — | — | — | — | — | — |
| 13 | Logic Ground | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 14 | PWM / Idle Out 1 | — | W51 | — | 0.5 | OEM-A-15 | — | — | — |
| 15 | CKP− | — | W30 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Ground Shield Drain | — | — | — | — | — | — | — | — |
| 17 | Analog In 7 | — | — | — | — | — | — | — | — |
| 18 | Sensor return | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Analog in 1 | — | W64 | — | 0.5 | OEM-D-17 | — | — | — |
| 2 | High current out 2 | — | W61 | — | 0.5 | OEM-A-20 | — | — | — |
| 20 | Analog in 2 | — | W67 | — | 0.5 | OEM-D-16 | — | — | — |
| 21 | Analog in 3 | — | W70 | — | 0.5 | OEM-D-12 | — | — | — |
| 22 | Analog In 4 | — | W80 | — | 0.5 | OEM-C-9 | — | — | — |
| 23 | Analog In 5 | — | W81 | — | 0.5 | OEM-D-8 | — | — | — |
| 24 | Tach out | — | W63 | — | 0.5 | OEM-C-4 | — | — | — |
| 25 | O2 in | — | W66 | — | 0.5 | OEM-D-14 | — | — | — |
| 26 | CMP+ | — | W33 | — | 0.5 | OEM-B-11 | — | — | — |
| 27 | CMP− | — | W34 | — | 0.5 | SP-0V-1 | — | — | — |
| 28 | Fuel pump relay out | — | W50 | — | 0.5 | OEM-A-8 | — | — | — |
| 29 | PWM out 2 | — | W53 | — | 0.5 | OEM-A-7 | — | — | — |
| 3 | Injector out J | — | W44 | — | 0.5 | OEM-A-1 | — | — | — |
| 30 | PWM out 3 | — | W57 | — | 0.5 | OEM-A-12 | — | — | — |
| 31 | Knock in 1 | — | W36 | — | 0.5 | OEM-D-4 | — | — | — |
| 32 | Digital switched in 1 | — | W73 | — | 0.5 | OEM-5-F2 | — | — | — |
| 33 | CAN L | — | — | — | — | — | — | — | — |
| 34 | CAN H | — | — | — | — | — | — | — | — |
| 35 | 12V+ switched power in | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Injector out I | — | W45 | — | 0.5 | OEM-A-3 | — | — | — |
| 5 | High current out 3 | — | W62 | — | 0.5 | OEM-A-9 | — | — | — |
| 6 | CKP+ | — | W29 | — | 0.5 | OEM-B-15 | — | — | — |
| 7 | Knock In 2 | — | W37 | — | 0.5 | OEM-D-3 | — | — | — |
| 8 | 5V+ VREF out | — | W28 | — | 0.5 | SP-5V1-1 | — | — | — |
| 9 | TPS in | — | W65 | — | 0.5 | OEM-D-11 | — | — | — |
MS3PROEVOHC-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector out A | — | W46 | — | 0.5 | OEM-A-5 | — | — | — |
| 10 | Injector out F | — | W47 | — | 0.5 | OEM-A-2 | — | — | — |
| 11 | Injector out G | — | W48 | — | 0.5 | OEM-A-4 | — | — | — |
| 12 | Injector out H | — | W49 | — | 0.5 | OEM-A-6 | — | — | — |
| 13 | Spark out G | — | W38 | — | 0.5 | OEM-A-21 | — | — | — |
| 14 | Spark out E | — | W39 | — | 0.5 | OEM-A-22 | — | — | — |
| 15 | Spark out C | — | W40 | — | 0.5 | OEM-B-8 | — | — | — |
| 16 | Spark out H | — | W41 | — | 0.5 | OEM-B-6 | — | — | — |
| 17 | Digital frequency in 2 (Hall) | — | W71 | — | 0.5 | OEM-C-2 | — | — | — |
| 18 | Ground Shield Drain | — | — | — | — | — | — | — | — |
| 19 | Digital switched 12V in | — | — | — | — | — | — | — | — |
| 2 | Injector out B | — | — | — | — | — | — | — | — |
| 20 | Digital switched in 2 | — | W74 | — | 0.5 | OEM-5-F4 | — | — | — |
| 21 | Digital frequency in 3 (unconditioned) | — | W72 | — | 0.5 | OEM-D-9 | — | — | — |
| 22 | Digital Frequency in 3 (VR+) | — | W78 | — | 0.5 | OEM-C-5 | — | — | — |
| 23 | Digital Frequency In 3 (VR−) | — | W79 | — | 0.5 | OEM-C-7 | — | — | — |
| 24 | Spark out F | — | W42 | — | 0.5 | OEM-B-4 | — | — | — |
| 25 | Spark out B | — | W43 | — | 0.5 | OEM-B-3 | — | — | — |
| 26 | Spark out D | — | — | — | — | — | — | — | — |
| 27 | Spark out A | — | — | — | — | — | — | — | — |
| 28 | Digital frequency in 1 (unconditioned) | — | W35 | — | 0.5 | OEM-B-9 | — | — | — |
| 29 | Digital switched in 3 | — | W75 | — | 0.5 | OEM-B-7 | — | — | — |
| 3 | Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 30 | Stepper IAC out 1B | — | W54 | — | 0.5 | OEM-5-F5 | — | — | — |
| 31 | Stepper IAC out 1A | — | W55 | — | 0.5 | OEM-5-F7 | — | — | — |
| 32 | Stepper IAC out 2A | — | — | — | — | — | — | — | — |
| 33 | Stepper IAC out 2B | — | — | — | — | — | — | — | — |
| 34 | Digital Frequency in 1 (VR+) | — | W31 | — | 0.5 | OEM-B-13 | — | — | — |
| 35 | Digital Frequency in 1 (VR−) | — | W32 | — | 0.5 | SP-0V-1 | — | — | — |
| 4 | Injector out C | — | — | — | — | — | — | — | — |
| 5 | Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 6 | Injector out D | — | — | — | — | — | — | — | — |
| 7 | Ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 8 | Injector out E | — | — | — | — | — | — | — | — |
| 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 | — | W59 | — | 0.5 | OEM-A-13 | — | — | — |
| 10 | Digital switched in 5 | — | W77 | — | 0.5 | OEM-C-3 | — | — | — |
| 11 | Digital switched in 4 | — | W76 | — | 0.5 | OEM-C-11 | — | — | — |
| 12 | Digital I/O 5 | — | — | — | — | — | — | — | — |
| 13 | Digital I/O 3 | — | — | — | — | — | — | — | — |
| 14 | Digital I/O 1 | — | — | — | — | — | — | — | — |
| 15 | 5V+ VREF out 2 | — | — | — | — | — | — | — | — |
| 17 | Sensor return | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
| 18 | Sensor return | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Sensor return | — | W22 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | PWM out 4 | — | W58 | — | 0.5 | OEM-A-11 | — | — | — |
| 20 | Sensor return | — | W23 | — | 0.5 | SP-0V-1 | — | — | — |
| 21 | Sensor return | — | W24 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | 5V+ VREF out 1 | — | — | — | — | — | — | — | — |
| 3 | Digital out 2 | — | W56 | — | 0.5 | OEM-A-10 | — | — | — |
| 4 | Digital out 1 | — | W52 | — | 0.5 | OEM-A-18 | — | — | — |
| 5 | Digital I/O 4 | — | — | — | — | — | — | — | — |
| 6 | Digital I/O 2 | — | — | — | — | — | — | — | — |
| 7 | Analog in 8 | — | — | — | — | — | — | — | — |
OEM-5
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| F2 | Front VTEC pressure switch | — | W73 | — | 0.5 | MS3PROEVOHC-A-32 | — | — | — |
| F4 | Rear VTEC pressure switch | — | W74 | — | 0.5 | MS3PROEVOHC-B-20 | — | — | — |
| F5 | Front VTEC solenoid valve | — | W54 | — | 0.5 | MS3PROEVOHC-B-30 | — | — | — |
| F7 | Rear VTEC solenoid valve | — | W55 | — | 0.5 | MS3PROEVOHC-B-31 | — | — | — |
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 1 | — | W44 | — | 0.5 | MS3PROEVOHC-A-3 | — | — | — |
| 10 | Front O2 sensor heater (HTCNTF) | — | W56 | — | 0.5 | MS3PROEVOHC-C-3 | — | — | — |
| 11 | EGR control solenoid | — | W58 | — | 0.5 | MS3PROEVOHC-C-2 | — | — | — |
| 12 | Rear O2 sensor heater (HTCNTR) | — | W57 | — | 0.5 | MS3PROEVOHC-A-30 | — | — | — |
| 13 | Check engine light (WARN) | — | W59 | — | 0.5 | MS3PROEVOHC-C-1 | — | — | — |
| 14 | Chamber volume control solenoid (BPS) | — | W60 | — | 0.5 | MS3PROEVOHC-A-1 | — | — | — |
| 15 | A/C clutch relay (ACC) | — | W51 | — | 0.5 | MS3PROEVOHC-A-14 | — | — | — |
| 18 | Radiator fan control (FANCNTR) | — | W52 | — | 0.5 | MS3PROEVOHC-C-4 | — | — | — |
| 2 | Injector 4 | — | W47 | — | 0.5 | MS3PROEVOHC-B-10 | — | — | — |
| 20 | EVAP purge cut-off solenoid (PGS) | — | W61 | — | 0.5 | MS3PROEVOHC-A-2 | — | — | — |
| 21 | Ignition coil 1 | — | W38 | — | 0.5 | MS3PROEVOHC-B-13 | — | — | — |
| 22 | Ignition coil 2 | — | W39 | — | 0.5 | MS3PROEVOHC-B-14 | — | — | — |
| 23 | Power ground (PG1) | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| 24 | Power ground (PG2) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 25 | ECU power (IGP1) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 26 | Sensor ground (LG1) | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Injector 2 | — | W45 | — | 0.5 | MS3PROEVOHC-A-4 | — | — | — |
| 4 | Injector 5 | — | W48 | — | 0.5 | MS3PROEVOHC-B-11 | — | — | — |
| 5 | Injector 3 | — | W46 | — | 0.5 | MS3PROEVOHC-B-1 | — | — | — |
| 6 | Injector 6 | — | W49 | — | 0.5 | MS3PROEVOHC-B-12 | — | — | — |
| 7 | Main relay | — | W53 | — | 0.5 | MS3PROEVOHC-A-29 | — | — | — |
| 8 | Fuel pump relay 2 (FLR2) | — | W50 | — | 0.5 | MS3PROEVOHC-A-28 | — | — | — |
| 9 | Idle air control valve (IACV) | — | W62 | — | 0.5 | MS3PROEVOHC-A-5 | — | — | — |
OEM-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | CYL 2M — CYP sensor 2 return | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 11 | CYL 1P — CYP sensor 1 signal | — | W33 | — | 0.5 | MS3PROEVOHC-A-26 | — | — | — |
| 12 | CYL 1M — CYP sensor 1 return | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 13 | CRNK 2P — TDC sensor signal | — | W31 | — | 0.5 | MS3PROEVOHC-B-34 | — | — | — |
| 14 | CRNK 2M — TDC sensor return | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 15 | CRNK 1P — crank sensor signal | — | W29 | — | 0.5 | MS3PROEVOHC-A-6 | — | — | — |
| 16 | CRNK 1M — crank sensor return | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | Chassis ground (LG2) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | Ignition coil 6 | — | W43 | — | 0.5 | MS3PROEVOHC-B-25 | — | — | — |
| 4 | Ignition coil 5 | — | W42 | — | 0.5 | MS3PROEVOHC-B-24 | — | — | — |
| 6 | Ignition coil 4 | — | W41 | — | 0.5 | MS3PROEVOHC-B-16 | — | — | — |
| 7 | Neutral switch (M/T) / gear position (A/T) | — | W75 | — | 0.5 | MS3PROEVOHC-B-29 | — | — | — |
| 8 | Ignition coil 3 | — | W40 | — | 0.5 | MS3PROEVOHC-B-15 | — | — | — |
| 9 | CYL 2P — CYP sensor 2 signal | — | W35 | — | 0.5 | MS3PROEVOHC-B-28 | — | — | — |
OEM-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU power (IGP2) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 10 | Traction control | — | — | — | — | — | — | — | — |
| 11 | Starter switch (STS) | — | W76 | — | 0.5 | MS3PROEVOHC-C-11 | — | — | — |
| 12 | Traction control | — | — | — | — | — | — | — | — |
| 2 | Vehicle speed sensor (VSS) | — | W71 | — | 0.5 | MS3PROEVOHC-B-17 | — | — | — |
| 3 | A/C switch (ACS) | — | W77 | — | 0.5 | MS3PROEVOHC-C-10 | — | — | — |
| 4 | Tachometer output (NEP) | — | W63 | — | 0.5 | MS3PROEVOHC-A-24 | — | — | — |
| 5 | A/C pressure switch (PDSW) | — | W78 | — | 0.5 | MS3PROEVOHC-B-22 | — | — | — |
| 6 | Traction control | — | — | — | — | — | — | — | — |
| 7 | Clutch switch (M/T) | — | W79 | — | 0.5 | MS3PROEVOHC-B-23 | — | — | — |
| 8 | Traction control | — | — | — | — | — | — | — | — |
| 9 | Service check connector (SCS) | — | W80 | — | 0.5 | MS3PROEVOHC-A-22 | — | — | — |
OEM-D
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Battery backup (VBU) | — | — | — | — | — | — | — | — |
| 11 | Throttle position sensor (TPS) | — | W65 | — | 0.5 | MS3PROEVOHC-A-9 | — | — | — |
| 12 | EGR lift sensor (EGRL) | — | W70 | — | 0.5 | MS3PROEVOHC-A-21 | — | — | — |
| 13 | Engine coolant temperature (ECT) | — | W68 | — | 0.5 | MS3PROEVOHC-A-10 | — | — | — |
| 14 | Primary O2 sensor | — | W66 | — | 0.5 | MS3PROEVOHC-A-25 | — | — | — |
| 15 | Intake air temperature (IAT) | — | W69 | — | 0.5 | MS3PROEVOHC-A-11 | — | — | — |
| 16 | Secondary O2 sensor | — | W67 | — | 0.5 | MS3PROEVOHC-A-20 | — | — | — |
| 17 | MAP sensor | — | W64 | — | 0.5 | MS3PROEVOHC-A-19 | — | — | — |
| 18 | +5V sensor supply (VCC) | — | W25 | — | 0.5 | SP-5V1-1 | — | — | — |
| 19 | +5V sensor supply (VCC) | — | W26 | — | 0.5 | SP-5V1-1 | — | — | — |
| 20 | +5V sensor supply (VCC) | — | W27 | — | 0.5 | SP-5V1-1 | — | — | — |
| 21 | Sensor ground (SG) | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Sensor ground (SG) | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Knock sensor — rear | — | W37 | — | 0.5 | MS3PROEVOHC-A-7 | — | — | — |
| 4 | Knock sensor — front | — | W36 | — | 0.5 | MS3PROEVOHC-A-31 | — | — | — |
| 5 | Traction control | — | — | — | — | — | — | — | — |
| 6 | Fuel pump voltage monitor (VFP) | — | — | — | — | — | — | — | — |
| 8 | Ignition timing adjuster (IGADJ) | — | W81 | — | 0.5 | MS3PROEVOHC-A-23 | — | — | — |
| 9 | Alternator FR signal | — | W72 | — | 0.5 | MS3PROEVOHC-B-21 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W11 | — | 0.5 | OEM-A-26 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-B-10 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-B-12 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-B-14 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-B-16 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-D-21 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | OEM-D-22 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | MS3PROEVOHC-A-13 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | MS3PROEVOHC-A-18 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | MS3PROEVOHC-C-17 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | MS3PROEVOHC-C-18 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | MS3PROEVOHC-C-19 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | MS3PROEVOHC-C-20 | — | — | — |
| 1 | — | — | W24 | — | 0.5 | MS3PROEVOHC-C-21 | — | — | — |
| 1 | — | — | W30 | — | 0.5 | MS3PROEVOHC-A-15 | — | — | — |
| 1 | — | — | W32 | — | 0.5 | MS3PROEVOHC-B-35 | — | — | — |
| 1 | — | — | W34 | — | 0.5 | MS3PROEVOHC-A-27 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A-25 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-C-1 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | MS3PROEVOHC-A-35 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W25 | — | 0.5 | OEM-D-18 | — | — | — |
| 1 | — | — | W26 | — | 0.5 | OEM-D-19 | — | — | — |
| 1 | — | — | W27 | — | 0.5 | OEM-D-20 | — | — | — |
| 1 | — | — | W28 | — | 0.5 | MS3PROEVOHC-A-8 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-A-23 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-A-24 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-B-2 | — | — | — |
| 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-5-F2 | Front VTEC pressure switch | digital_in | MS3PROEVOHC-A-32 | Digital switched in 1 | digital_in | single_source | |
| OEM-5-F4 | Rear VTEC pressure switch | digital_in | MS3PROEVOHC-B-20 | Digital switched in 2 | digital_in | single_source | |
| OEM-5-F5 | Front VTEC solenoid valve | high_side_out | MS3PROEVOHC-B-30 | Stepper IAC out 1B | hbridge_out | single_source | |
| OEM-5-F7 | Rear VTEC solenoid valve | high_side_out | MS3PROEVOHC-B-31 | Stepper IAC out 1A | hbridge_out | single_source | |
| OEM-A-1 | Injector 1 | injector_out | MS3PROEVOHC-A-3 | Injector out J | injector_out | single_source | |
| OEM-A-10 | Front O2 sensor heater (HTCNTF) | low_side_out | MS3PROEVOHC-C-3 | Digital out 2 | low_side_out | single_source | |
| OEM-A-11 | EGR control solenoid | low_side_out | MS3PROEVOHC-C-2 | PWM out 4 | low_side_out | single_source | |
| OEM-A-12 | Rear O2 sensor heater (HTCNTR) | low_side_out | MS3PROEVOHC-A-30 | PWM out 3 | low_side_out | single_source | |
| OEM-A-13 | Check engine light (WARN) | low_side_out | MS3PROEVOHC-C-1 | PWM out 5 | low_side_out | single_source | |
| OEM-A-14 | Chamber volume control solenoid (BPS) | low_side_out | MS3PROEVOHC-A-1 | High current out 1 | low_side_out | single_source | |
| OEM-A-15 | A/C clutch relay (ACC) | low_side_out | MS3PROEVOHC-A-14 | PWM / Idle Out 1 | low_side_out | single_source | |
| OEM-A-18 | Radiator fan control (FANCNTR) | low_side_out | MS3PROEVOHC-C-4 | Digital out 1 | low_side_out | single_source | |
| OEM-A-2 | Injector 4 | injector_out | MS3PROEVOHC-B-10 | Injector out F | injector_out | single_source | |
| OEM-A-20 | EVAP purge cut-off solenoid (PGS) | low_side_out | MS3PROEVOHC-A-2 | High current out 2 | low_side_out | single_source | |
| OEM-A-21 | Ignition coil 1 | ignition_out | MS3PROEVOHC-B-13 | Spark out G | ignition_out | single_source | |
| OEM-A-22 | Ignition coil 2 | ignition_out | MS3PROEVOHC-B-14 | Spark out E | ignition_out | single_source | |
| OEM-A-23 | Power ground (PG1) | ground | MS3PROEVOHC-B-3 + MS3PROEVOHC-B-5 + MS3PROEVOHC-B-7 + MS3PROEVOHC-B-9 | Ground + Ground + Ground + Ground | ground | single_source | |
| OEM-A-24 | Power ground (PG2) | ground | MS3PROEVOHC-B-3 + MS3PROEVOHC-B-5 + MS3PROEVOHC-B-7 + MS3PROEVOHC-B-9 | Ground + Ground + Ground + Ground | ground | single_source | |
| OEM-A-25 | ECU power (IGP1) | power_in | MS3PROEVOHC-A-35 | 12V+ switched power in | power_in | single_source | |
| OEM-A-26 | Sensor ground (LG1) | sensor_ground | MS3PROEVOHC-A-13 + MS3PROEVOHC-A-15 + MS3PROEVOHC-A-18 + MS3PROEVOHC-A-27 + MS3PROEVOHC-B-35 + MS3PROEVOHC-C-17 + MS3PROEVOHC-C-18 + MS3PROEVOHC-C-19 + MS3PROEVOHC-C-20 + MS3PROEVOHC-C-21 | Logic Ground + CKP− + Sensor return + CMP− + Digital Frequency in 1 (VR−) + Sensor return + Sensor return + Sensor return + Sensor return + Sensor return | digital_in + sensor_ground + trigger_in | single_source | |
| OEM-A-3 | Injector 2 | injector_out | MS3PROEVOHC-A-4 | Injector out I | injector_out | single_source | |
| OEM-A-4 | Injector 5 | injector_out | MS3PROEVOHC-B-11 | Injector out G | injector_out | corroborated | |
| OEM-A-5 | Injector 3 | injector_out | MS3PROEVOHC-B-1 | Injector out A | injector_out | single_source | |
| OEM-A-6 | Injector 6 | injector_out | MS3PROEVOHC-B-12 | Injector out H | injector_out | single_source | |
| OEM-A-7 | Main relay | low_side_out | MS3PROEVOHC-A-29 | PWM out 2 | low_side_out | single_source | |
| OEM-A-8 | Fuel pump relay 2 (FLR2) | low_side_out | MS3PROEVOHC-A-28 | Fuel pump relay out | low_side_out | single_source | |
| OEM-A-9 | Idle air control valve (IACV) | low_side_out | MS3PROEVOHC-A-5 | High current out 3 | low_side_out | single_source | |
| OEM-B-10 | CYL 2M — CYP sensor 2 return | sensor_ground | MS3PROEVOHC-A-13 + MS3PROEVOHC-A-15 + MS3PROEVOHC-A-18 + MS3PROEVOHC-A-27 + MS3PROEVOHC-B-35 + MS3PROEVOHC-C-17 + MS3PROEVOHC-C-18 + MS3PROEVOHC-C-19 + MS3PROEVOHC-C-20 + MS3PROEVOHC-C-21 | Logic Ground + CKP− + Sensor return + CMP− + Digital Frequency in 1 (VR−) + Sensor return + Sensor return + Sensor return + Sensor return + Sensor return | digital_in + sensor_ground + trigger_in | single_source | |
| OEM-B-11 | CYL 1P — CYP sensor 1 signal | trigger_in | MS3PROEVOHC-A-26 | CMP+ | trigger_in | single_source | |
| OEM-B-12 | CYL 1M — CYP sensor 1 return | sensor_ground | MS3PROEVOHC-A-13 + MS3PROEVOHC-A-15 + MS3PROEVOHC-A-18 + MS3PROEVOHC-A-27 + MS3PROEVOHC-B-35 + MS3PROEVOHC-C-17 + MS3PROEVOHC-C-18 + MS3PROEVOHC-C-19 + MS3PROEVOHC-C-20 + MS3PROEVOHC-C-21 | Logic Ground + CKP− + Sensor return + CMP− + Digital Frequency in 1 (VR−) + Sensor return + Sensor return + Sensor return + Sensor return + Sensor return | digital_in + sensor_ground + trigger_in | single_source | |
| OEM-B-13 | CRNK 2P — TDC sensor signal | trigger_in | MS3PROEVOHC-B-34 | Digital Frequency in 1 (VR+) | digital_in | single_source | |
| OEM-B-14 | CRNK 2M — TDC sensor return | sensor_ground | MS3PROEVOHC-A-13 + MS3PROEVOHC-A-15 + MS3PROEVOHC-A-18 + MS3PROEVOHC-A-27 + MS3PROEVOHC-B-35 + MS3PROEVOHC-C-17 + MS3PROEVOHC-C-18 + MS3PROEVOHC-C-19 + MS3PROEVOHC-C-20 + MS3PROEVOHC-C-21 | Logic Ground + CKP− + Sensor return + CMP− + Digital Frequency in 1 (VR−) + Sensor return + Sensor return + Sensor return + Sensor return + Sensor return | digital_in + sensor_ground + trigger_in | single_source | |
| OEM-B-15 | CRNK 1P — crank sensor signal | trigger_in | MS3PROEVOHC-A-6 | CKP+ | trigger_in | single_source | |
| OEM-B-16 | CRNK 1M — crank sensor return | sensor_ground | MS3PROEVOHC-A-13 + MS3PROEVOHC-A-15 + MS3PROEVOHC-A-18 + MS3PROEVOHC-A-27 + MS3PROEVOHC-B-35 + MS3PROEVOHC-C-17 + MS3PROEVOHC-C-18 + MS3PROEVOHC-C-19 + MS3PROEVOHC-C-20 + MS3PROEVOHC-C-21 | Logic Ground + CKP− + Sensor return + CMP− + Digital Frequency in 1 (VR−) + Sensor return + Sensor return + Sensor return + Sensor return + Sensor return | digital_in + sensor_ground + trigger_in | single_source | |
| OEM-B-2 | Chassis ground (LG2) | ground | MS3PROEVOHC-B-3 + MS3PROEVOHC-B-5 + MS3PROEVOHC-B-7 + MS3PROEVOHC-B-9 | Ground + Ground + Ground + Ground | ground | single_source | |
| OEM-B-3 | Ignition coil 6 | ignition_out | MS3PROEVOHC-B-25 | Spark out B | ignition_out | single_source | |
| OEM-B-4 | Ignition coil 5 | ignition_out | MS3PROEVOHC-B-24 | Spark out F | ignition_out | single_source | |
| OEM-B-6 | Ignition coil 4 | ignition_out | MS3PROEVOHC-B-16 | Spark out H | ignition_out | single_source | |
| OEM-B-7 | Neutral switch (M/T) / gear position (A/T) | digital_in | MS3PROEVOHC-B-29 | Digital switched in 3 | digital_in | single_source | |
| OEM-B-8 | Ignition coil 3 | ignition_out | MS3PROEVOHC-B-15 | Spark out C | ignition_out | single_source | |
| OEM-B-9 | CYL 2P — CYP sensor 2 signal | trigger_in | MS3PROEVOHC-B-28 | Digital frequency in 1 (unconditioned) | digital_in | single_source | |
| OEM-C-1 | ECU power (IGP2) | power_in | MS3PROEVOHC-A-35 | 12V+ switched power in | power_in | single_source | |
| OEM-C-10 | Traction control | — | — | — | — | single_source | |
| OEM-C-11 | Starter switch (STS) | digital_in | MS3PROEVOHC-C-11 | Digital switched in 4 | digital_in | single_source | |
| OEM-C-12 | Traction control | — | — | — | — | single_source | |
| OEM-C-2 | Vehicle speed sensor (VSS) | digital_in | MS3PROEVOHC-B-17 | Digital frequency in 2 (Hall) | digital_in | single_source | |
| OEM-C-3 | A/C switch (ACS) | digital_in | MS3PROEVOHC-C-10 | Digital switched in 5 | digital_in | single_source | |
| OEM-C-4 | Tachometer output (NEP) | tacho_out | MS3PROEVOHC-A-24 | Tach out | tacho_out | single_source | |
| OEM-C-5 | A/C pressure switch (PDSW) | digital_in | MS3PROEVOHC-B-22 | Digital Frequency in 3 (VR+) | digital_in | single_source | |
| OEM-C-6 | Traction control | — | — | — | — | single_source | |
| OEM-C-7 | Clutch switch (M/T) | digital_in | MS3PROEVOHC-B-23 | Digital Frequency In 3 (VR−) | digital_in | single_source | |
| OEM-C-8 | Traction control | — | — | — | — | single_source | |
| OEM-C-9 | Service check connector (SCS) | digital_in | MS3PROEVOHC-A-22 | Analog In 4 | analog_in | single_source | |
| OEM-D-1 | Battery backup (VBU) | power_in | — | — | — | single_source | |
| OEM-D-11 | Throttle position sensor (TPS) | analog_in | MS3PROEVOHC-A-9 | TPS in | analog_in | single_source | |
| OEM-D-12 | EGR lift sensor (EGRL) | analog_in | MS3PROEVOHC-A-21 | Analog in 3 | analog_in | single_source | |
| OEM-D-13 | Engine coolant temperature (ECT) | temp_in | MS3PROEVOHC-A-10 | MAT in | temp_in | single_source | |
| OEM-D-14 | Primary O2 sensor | lambda_nb_in | MS3PROEVOHC-A-25 | O2 in | lambda_nb_in | single_source | |
| OEM-D-15 | Intake air temperature (IAT) | temp_in | MS3PROEVOHC-A-11 | CLT in | temp_in | single_source | |
| OEM-D-16 | Secondary O2 sensor | lambda_nb_in | MS3PROEVOHC-A-20 | Analog in 2 | analog_in | single_source | |
| OEM-D-17 | MAP sensor | analog_in | MS3PROEVOHC-A-19 | Analog in 1 | analog_in | single_source | |
| OEM-D-18 | +5V sensor supply (VCC) | vref | MS3PROEVOHC-A-8 | 5V+ VREF out | vref | single_source | |
| OEM-D-19 | +5V sensor supply (VCC) | vref | MS3PROEVOHC-A-8 | 5V+ VREF out | vref | single_source | |
| OEM-D-20 | +5V sensor supply (VCC) | vref | MS3PROEVOHC-A-8 | 5V+ VREF out | vref | single_source | |
| OEM-D-21 | Sensor ground (SG) | sensor_ground | MS3PROEVOHC-A-13 + MS3PROEVOHC-A-15 + MS3PROEVOHC-A-18 + MS3PROEVOHC-A-27 + MS3PROEVOHC-B-35 + MS3PROEVOHC-C-17 + MS3PROEVOHC-C-18 + MS3PROEVOHC-C-19 + MS3PROEVOHC-C-20 + MS3PROEVOHC-C-21 | Logic Ground + CKP− + Sensor return + CMP− + Digital Frequency in 1 (VR−) + Sensor return + Sensor return + Sensor return + Sensor return + Sensor return | digital_in + sensor_ground + trigger_in | single_source | |
| OEM-D-22 | Sensor ground (SG) | sensor_ground | MS3PROEVOHC-A-13 + MS3PROEVOHC-A-15 + MS3PROEVOHC-A-18 + MS3PROEVOHC-A-27 + MS3PROEVOHC-B-35 + MS3PROEVOHC-C-17 + MS3PROEVOHC-C-18 + MS3PROEVOHC-C-19 + MS3PROEVOHC-C-20 + MS3PROEVOHC-C-21 | Logic Ground + CKP− + Sensor return + CMP− + Digital Frequency in 1 (VR−) + Sensor return + Sensor return + Sensor return + Sensor return + Sensor return | digital_in + sensor_ground + trigger_in | single_source | |
| OEM-D-3 | Knock sensor — rear | knock_in | MS3PROEVOHC-A-7 | Knock In 2 | knock_in | single_source | |
| OEM-D-4 | Knock sensor — front | knock_in | MS3PROEVOHC-A-31 | Knock in 1 | knock_in | single_source | |
| OEM-D-5 | Traction control | — | — | — | — | single_source | |
| OEM-D-6 | Fuel pump voltage monitor (VFP) | — | — | — | — | corroborated | |
| OEM-D-8 | Ignition timing adjuster (IGADJ) | digital_in | MS3PROEVOHC-A-23 | Analog In 5 | analog_in | single_source | |
| OEM-D-9 | Alternator FR signal | digital_in | MS3PROEVOHC-B-21 | Digital frequency in 3 (unconditioned) | digital_in | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-A-25 | SP-14V-1 | 0.85 | no route | ECU power (IGP1) | — | |
| W2 | OEM-C-1 | SP-14V-1 | 0.85 | no route | ECU power (IGP2) | — | |
| W3 | SP-14V-1 | MS3PROEVOHC-A-35 | 0.85 | no route | 12V+ switched power in | — | |
| W4 | OEM-A-23 | SP-GND-1 | 0.85 | no route | Power ground (PG1) | — | |
| W5 | OEM-A-24 | SP-GND-1 | 0.85 | no route | Power ground (PG2) | — | |
| W6 | OEM-B-2 | SP-GND-1 | 0.85 | no route | Chassis ground (LG2) | — | |
| 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-A-26 | SP-0V-1 | 0.5 | no route | Sensor ground (LG1) | — | |
| W12 | OEM-B-10 | SP-0V-1 | 0.5 | no route | CYL 2M — CYP sensor 2 return | — | |
| W13 | OEM-B-12 | SP-0V-1 | 0.5 | no route | CYL 1M — CYP sensor 1 return | — | |
| W14 | OEM-B-14 | SP-0V-1 | 0.5 | no route | CRNK 2M — TDC sensor return | — | |
| W15 | OEM-B-16 | SP-0V-1 | 0.5 | no route | CRNK 1M — crank sensor return | — | |
| W16 | OEM-D-21 | SP-0V-1 | 0.5 | no route | Sensor ground (SG) | — | |
| W17 | OEM-D-22 | SP-0V-1 | 0.5 | no route | Sensor ground (SG) | — | |
| W18 | SP-0V-1 | MS3PROEVOHC-A-13 | 0.5 | no route | Logic Ground | — | |
| W19 | SP-0V-1 | MS3PROEVOHC-A-18 | 0.5 | no route | Sensor return | — | |
| W20 | SP-0V-1 | MS3PROEVOHC-C-17 | 0.5 | no route | Sensor return | — | |
| W21 | SP-0V-1 | MS3PROEVOHC-C-18 | 0.5 | no route | Sensor return | — | |
| W22 | SP-0V-1 | MS3PROEVOHC-C-19 | 0.5 | no route | Sensor return | — | |
| W23 | SP-0V-1 | MS3PROEVOHC-C-20 | 0.5 | no route | Sensor return | — | |
| W24 | SP-0V-1 | MS3PROEVOHC-C-21 | 0.5 | no route | Sensor return | — | |
| W25 | OEM-D-18 | SP-5V1-1 | 0.5 | no route | +5V sensor supply (VCC) | — | |
| W26 | OEM-D-19 | SP-5V1-1 | 0.5 | no route | +5V sensor supply (VCC) | — | |
| W27 | OEM-D-20 | SP-5V1-1 | 0.5 | no route | +5V sensor supply (VCC) | — | |
| W28 | SP-5V1-1 | MS3PROEVOHC-A-8 | 0.5 | no route | 5V+ VREF out | — | |
| W29 | OEM-B-15 | MS3PROEVOHC-A-6 | 0.5 | no route | CRNK 1P — crank sensor signal | — | |
| W30 | SP-0V-1 | MS3PROEVOHC-A-15 | 0.5 | no route | CKP− | — | |
| W31 | OEM-B-13 | MS3PROEVOHC-B-34 | 0.5 | no route | CRNK 2P — TDC sensor signal | — | |
| W32 | SP-0V-1 | MS3PROEVOHC-B-35 | 0.5 | no route | Digital Frequency in 1 (VR−) | — | |
| W33 | OEM-B-11 | MS3PROEVOHC-A-26 | 0.5 | no route | CYL 1P — CYP sensor 1 signal | — | |
| W34 | SP-0V-1 | MS3PROEVOHC-A-27 | 0.5 | no route | CMP− | — | |
| W35 | OEM-B-9 | MS3PROEVOHC-B-28 | 0.5 | no route | CYL 2P — CYP sensor 2 signal | — | |
| W36 | OEM-D-4 | MS3PROEVOHC-A-31 | 0.5 | no route | Knock sensor — front | — | |
| W37 | OEM-D-3 | MS3PROEVOHC-A-7 | 0.5 | no route | Knock sensor — rear | — | |
| W38 | OEM-A-21 | MS3PROEVOHC-B-13 | 0.5 | no route | Ignition coil 1 | — | |
| W39 | OEM-A-22 | MS3PROEVOHC-B-14 | 0.5 | no route | Ignition coil 2 | — | |
| W40 | OEM-B-8 | MS3PROEVOHC-B-15 | 0.5 | no route | Ignition coil 3 | — | |
| W41 | OEM-B-6 | MS3PROEVOHC-B-16 | 0.5 | no route | Ignition coil 4 | — | |
| W42 | OEM-B-4 | MS3PROEVOHC-B-24 | 0.5 | no route | Ignition coil 5 | — | |
| W43 | OEM-B-3 | MS3PROEVOHC-B-25 | 0.5 | no route | Ignition coil 6 | — | |
| W44 | OEM-A-1 | MS3PROEVOHC-A-3 | 0.5 | no route | Injector 1 | — | |
| W45 | OEM-A-3 | MS3PROEVOHC-A-4 | 0.5 | no route | Injector 2 | — | |
| W46 | OEM-A-5 | MS3PROEVOHC-B-1 | 0.5 | no route | Injector 3 | — | |
| W47 | OEM-A-2 | MS3PROEVOHC-B-10 | 0.5 | no route | Injector 4 | — | |
| W48 | OEM-A-4 | MS3PROEVOHC-B-11 | 0.5 | no route | Injector 5 | — | |
| W49 | OEM-A-6 | MS3PROEVOHC-B-12 | 0.5 | no route | Injector 6 | — | |
| W50 | OEM-A-8 | MS3PROEVOHC-A-28 | 0.5 | no route | Fuel pump relay 2 (FLR2) | — | |
| W51 | OEM-A-15 | MS3PROEVOHC-A-14 | 0.5 | no route | A/C clutch relay (ACC) | — | |
| W52 | OEM-A-18 | MS3PROEVOHC-C-4 | 0.5 | no route | Radiator fan control (FANCNTR) | — | |
| W53 | OEM-A-7 | MS3PROEVOHC-A-29 | 0.5 | no route | Main relay | — | |
| W54 | OEM-5-F5 | MS3PROEVOHC-B-30 | 0.5 | no route | Front VTEC solenoid valve | — | |
| W55 | OEM-5-F7 | MS3PROEVOHC-B-31 | 0.5 | no route | Rear VTEC solenoid valve | — | |
| W56 | OEM-A-10 | MS3PROEVOHC-C-3 | 0.5 | no route | Front O2 sensor heater (HTCNTF) | — | |
| W57 | OEM-A-12 | MS3PROEVOHC-A-30 | 0.5 | no route | Rear O2 sensor heater (HTCNTR) | — | |
| W58 | OEM-A-11 | MS3PROEVOHC-C-2 | 0.5 | no route | EGR control solenoid | — | |
| W59 | OEM-A-13 | MS3PROEVOHC-C-1 | 0.5 | no route | Check engine light (WARN) | — | |
| W60 | OEM-A-14 | MS3PROEVOHC-A-1 | 0.5 | no route | Chamber volume control solenoid (BPS) | — | |
| W61 | OEM-A-20 | MS3PROEVOHC-A-2 | 0.5 | no route | EVAP purge cut-off solenoid (PGS) | — | |
| W62 | OEM-A-9 | MS3PROEVOHC-A-5 | 0.5 | no route | Idle air control valve (IACV) | — | |
| W63 | OEM-C-4 | MS3PROEVOHC-A-24 | 0.5 | no route | Tachometer output (NEP) | — | |
| W64 | OEM-D-17 | MS3PROEVOHC-A-19 | 0.5 | no route | MAP sensor | — | |
| W65 | OEM-D-11 | MS3PROEVOHC-A-9 | 0.5 | no route | Throttle position sensor (TPS) | — | |
| W66 | OEM-D-14 | MS3PROEVOHC-A-25 | 0.5 | no route | Primary O2 sensor | — | |
| W67 | OEM-D-16 | MS3PROEVOHC-A-20 | 0.5 | no route | Secondary O2 sensor | — | |
| W68 | OEM-D-13 | MS3PROEVOHC-A-10 | 0.5 | no route | Engine coolant temperature (ECT) | — | |
| W69 | OEM-D-15 | MS3PROEVOHC-A-11 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W70 | OEM-D-12 | MS3PROEVOHC-A-21 | 0.5 | no route | EGR lift sensor (EGRL) | — | |
| W71 | OEM-C-2 | MS3PROEVOHC-B-17 | 0.5 | no route | Vehicle speed sensor (VSS) | — | |
| W72 | OEM-D-9 | MS3PROEVOHC-B-21 | 0.5 | no route | Alternator FR signal | — | |
| W73 | OEM-5-F2 | MS3PROEVOHC-A-32 | 0.5 | no route | Front VTEC pressure switch | — | |
| W74 | OEM-5-F4 | MS3PROEVOHC-B-20 | 0.5 | no route | Rear VTEC pressure switch | — | |
| W75 | OEM-B-7 | MS3PROEVOHC-B-29 | 0.5 | no route | Neutral switch (M/T) / gear position (A/T) | — | |
| W76 | OEM-C-11 | MS3PROEVOHC-C-11 | 0.5 | no route | Starter switch (STS) | — | |
| W77 | OEM-C-3 | MS3PROEVOHC-C-10 | 0.5 | no route | A/C switch (ACS) | — | |
| W78 | OEM-C-5 | MS3PROEVOHC-B-22 | 0.5 | no route | A/C pressure switch (PDSW) | — | |
| W79 | OEM-C-7 | MS3PROEVOHC-B-23 | 0.5 | no route | Clutch switch (M/T) | — | |
| W80 | OEM-C-9 | MS3PROEVOHC-A-22 | 0.5 | no route | Service check connector (SCS) | — | |
| W81 | OEM-D-8 | MS3PROEVOHC-A-23 | 0.5 | no route | Ignition timing adjuster (IGADJ) | — |
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 (10)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | MS3PROEVOHC-A-27 ↔ MS3PROEVOHC-B-35 | MS3PROEVOHC-A-27 "CMP−" [trigger_in] is wired to MS3PROEVOHC-B-35 "Digital Frequency in 1 (VR−)" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| warn | NET_FAMILY | OEM-5-F5 ↔ MS3PROEVOHC-B-30 | OEM-5-F5 "Front VTEC solenoid valve" [high_side_out] is wired to MS3PROEVOHC-B-30 "Stepper IAC out 1B" [hbridge_out]. A half-bridge can act as a high-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-5-F7 ↔ MS3PROEVOHC-B-31 | OEM-5-F7 "Rear VTEC solenoid valve" [high_side_out] is wired to MS3PROEVOHC-B-31 "Stepper IAC out 1A" [hbridge_out]. A half-bridge can act as a high-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-B-13 ↔ MS3PROEVOHC-B-34 | OEM-B-13 "CRNK 2P — TDC sensor signal" [trigger_in] is wired to MS3PROEVOHC-B-34 "Digital Frequency in 1 (VR+)" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| warn | NET_FAMILY | OEM-B-9 ↔ MS3PROEVOHC-B-28 | OEM-B-9 "CYL 2P — CYP sensor 2 signal" [trigger_in] is wired to MS3PROEVOHC-B-28 "Digital frequency in 1 (unconditioned)" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| warn | NET_FAMILY | OEM-C-9 ↔ MS3PROEVOHC-A-22 | OEM-C-9 "Service check connector (SCS)" [digital_in] is wired to MS3PROEVOHC-A-22 "Analog In 4" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| warn | NET_FAMILY | OEM-D-8 ↔ MS3PROEVOHC-A-23 | OEM-D-8 "Ignition timing adjuster (IGADJ)" [digital_in] is wired to MS3PROEVOHC-A-23 "Analog In 5" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| info | NET_FAMILY | OEM-B-10 ↔ MS3PROEVOHC-B-35 | OEM-B-10 "CYL 2M — CYP sensor 2 return" [sensor_ground] is wired to MS3PROEVOHC-B-35 "Digital Frequency in 1 (VR−)" [digital_in]. A digital input used as a ground/identification strap (e.g. AT/MT ID is grounded on manual cars) is compatible with a sensor ground. |
| info | NET_FAMILY | OEM-B-14 ↔ MS3PROEVOHC-A-15 | OEM-B-14 "CRNK 2M — TDC sensor return" [sensor_ground] is wired to MS3PROEVOHC-A-15 "CKP−" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | UNMAPPED | OEM | 6 optional OEM pins are not mapped: OEM-C-10 Traction control; OEM-C-12 Traction control; OEM-C-6 Traction control; OEM-C-8 Traction control; OEM-D-5 Traction control; OEM-D-6 Fuel pump voltage monitor (VFP) |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-D-1 | 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 Honda C30A not found in the ECU's docs (MS3 decoder list has no C30A/C32B/NSX (K24A2, RC51/AP1 S2000, TSX/D17, J-series)) 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-D 1: Battery backup (VBU): AMP EFI MS3Pro EVO+ HC has no battery-constant input; not needed - OEM-C 10: Traction control: not classified in the library; wire by hand - OEM-C 12: Traction control: not classified in the library; wire by hand - OEM-C 6: Traction control: not classified in the library; wire by hand - OEM-C 8: Traction control: not classified in the library; wire by hand - OEM-D 5: Traction control: not classified in the library; wire by hand - OEM-D 6: Fuel pump voltage monitor (VFP): not classified in the library; wire by hand - 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 | AEM EMS 30-1042 (Series 1) plug-and-play install manual — 1991-94 NSX | https://fancy-craft.firebaseapp.com/NSX/report/ecu/EMS_-_30-1042.pdf | archive | 2026-10-05 | 0cad10bc64b5 |
| 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 |
| 3 | vendor_doc | dodo-upgrades: Honda OBD1 V6 ECU pinout | https://dodo-upgrades.nl/index.php/obd1-v6-pinouts/ | archive | 2026-10-05 | f9539af28904 |