MX-5 Miata NB2 2001-05 (BP-Z3, VVT; excludes Mazdaspeed) → AMP EFI MS3Pro EVO+ HC (auto)
MX-5 Miata NB2 2001-05 (BP-Z3, VVT; excludes Mazdaspeed) — AMP EFI — MS3Pro EVO+ HC
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-09
Before you start
Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
Install modifications
Steps on the car itself, outside the harness. Every harness for this car inherits them.
- Re-route the pressure-sensor vacuum hose to the intake manifoldrequired
Re-route the pressure sensor's (Mazda "EGR boost sensor", pin 4AE) vacuum hose directly to the intake manifold, bypassing the EGR boost solenoid. The stock ECU multiplexes baro + MAP through that solenoid: with it off the sensor reads atmosphere, with it energized it reads manifold. After re-routing the sensor reads MAP only, so the standalone needs its own barometric source — its onboard baro sensor if fitted, or a separate baro sensor on a spare analog input. (Alternative, not recommended: keep the hose stock and have the ECU energize the solenoid permanently via a low-side output switched with ignition; this costs an output.)
Why: With the solenoid off (its default) the sensor reads atmospheric pressure, not manifold pressure, so a standalone that uses this sensor as its MAP input would read the wrong value.
Where: EGR boost solenoid and the pressure sensor's vacuum hose (sensor signal 4AE).
Source: Justin Barrera — Miata NA/NB wiring corrections
| Status | proposal · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | none |
| Size of the job | 65 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-2-P | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-4-AF | 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-4-A | 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-4-O | 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-4-L | MS3PROEVOHC-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-3-Y | MS3PROEVOHC-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | SP-0V-1 | MS3PROEVOHC-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-3-V | MS3PROEVOHC-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | SP-0V-1 | MS3PROEVOHC-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-4-M | MS3PROEVOHC-A-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-3-F | MS3PROEVOHC-B-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-3-I | MS3PROEVOHC-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-2-A | MS3PROEVOHC-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-2-D | MS3PROEVOHC-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-2-G | MS3PROEVOHC-B-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-2-J | MS3PROEVOHC-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-2-B | MS3PROEVOHC-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-2-C | MS3PROEVOHC-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-2-K | MS3PROEVOHC-C-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-2-M | MS3PROEVOHC-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-3-H | MS3PROEVOHC-C-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-3-J | MS3PROEVOHC-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-3-P | MS3PROEVOHC-C-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-2-Q | MS3PROEVOHC-C-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-2-E | MS3PROEVOHC-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-2-F | MS3PROEVOHC-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-2-H | MS3PROEVOHC-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-2-I | MS3PROEVOHC-B-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-2-N | MS3PROEVOHC-B-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-2-R | MS3PROEVOHC-B-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-3-E | MS3PROEVOHC-B-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-3-M | MS3PROEVOHC-B-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-3-U | MS3PROEVOHC-B-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-4-D | MS3PROEVOHC-B-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-3-O | MS3PROEVOHC-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-4-X | MS3PROEVOHC-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-4-AE | MS3PROEVOHC-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-4-V | MS3PROEVOHC-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-4-AA | MS3PROEVOHC-A-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-4-W | MS3PROEVOHC-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-4-P | MS3PROEVOHC-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-4-N | MS3PROEVOHC-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-4-AD | MS3PROEVOHC-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-3-T | MS3PROEVOHC-B-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-3-S | MS3PROEVOHC-A-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-4-B | MS3PROEVOHC-B-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-4-C | MS3PROEVOHC-B-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-4-F | MS3PROEVOHC-C-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W63 | OEM-4-H | MS3PROEVOHC-C-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W64 | OEM-4-I | MS3PROEVOHC-B-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W65 | OEM-4-J | MS3PROEVOHC-B-35 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ |
Bench test (before first power-up)
Pre-power install steps (make these cuts/modifications on the car first, then verify the checks below): Re-route the pressure-sensor vacuum hose to the intake manifold.
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-35 | MS3PROEVOHC-A-8 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 5 | MS3PROEVOHC-B-3 | MS3PROEVOHC-A-8 | open (OL) | power ground must not touch 5 V sensor reference |
If any reading doesn't match, stop and get help before powering up.
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-2-E | — | — | — |
| 10 | MAT in | — | W55 | — | 0.5 | OEM-4-P | — | — | — |
| 11 | CLT in | — | W56 | — | 0.5 | OEM-4-N | — | — | — |
| 12 | Analog In 6 | — | — | — | — | — | — | — | — |
| 13 | Logic Ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 14 | PWM / Idle Out 1 | — | W32 | — | 0.5 | OEM-2-C | — | — | — |
| 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-4-X | — | — | — |
| 2 | High current out 2 | — | W40 | — | 0.5 | OEM-2-F | — | — | — |
| 20 | Analog in 2 | — | W51 | — | 0.5 | OEM-4-AE | — | — | — |
| 21 | Analog in 3 | — | W54 | — | 0.5 | OEM-4-W | — | — | — |
| 22 | Analog In 4 | — | W57 | — | 0.5 | OEM-4-AD | — | — | — |
| 23 | Analog In 5 | — | — | — | — | — | — | — | — |
| 24 | Tach out | — | W49 | — | 0.5 | OEM-3-O | — | — | — |
| 25 | O2 in | — | W53 | — | 0.5 | OEM-4-AA | — | — | — |
| 26 | CMP+ | — | W22 | — | 0.5 | OEM-3-V | — | — | — |
| 27 | CMP− | — | W23 | — | 0.5 | SP-0V-1 | — | — | — |
| 28 | Fuel pump relay out | — | W31 | — | 0.5 | OEM-2-B | — | — | — |
| 29 | PWM out 2 | — | W34 | — | 0.5 | OEM-2-M | — | — | — |
| 3 | Injector out J | — | W27 | — | 0.5 | OEM-2-A | — | — | — |
| 30 | PWM out 3 | — | W36 | — | 0.5 | OEM-3-J | — | — | — |
| 31 | Knock in 1 | — | W24 | — | 0.5 | OEM-4-M | — | — | — |
| 32 | Digital switched in 1 | — | W59 | — | 0.5 | OEM-3-S | — | — | — |
| 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-2-D | — | — | — |
| 5 | High current out 3 | — | W41 | — | 0.5 | OEM-2-H | — | — | — |
| 6 | CKP+ | — | W20 | — | 0.5 | OEM-3-Y | — | — | — |
| 7 | Knock In 2 | — | — | — | — | — | — | — | — |
| 8 | 5V+ VREF out | — | W19 | — | 0.5 | OEM-4-L | — | — | — |
| 9 | TPS in | — | W52 | — | 0.5 | OEM-4-V | — | — | — |
MS3PROEVOHC-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector out A | — | W29 | — | 0.5 | OEM-2-G | — | — | — |
| 10 | Injector out F | — | W30 | — | 0.5 | OEM-2-J | — | — | — |
| 11 | Injector out G | — | W42 | — | 0.5 | OEM-2-I | — | — | — |
| 12 | Injector out H | — | W43 | — | 0.5 | OEM-2-N | — | — | — |
| 13 | Spark out G | — | W25 | — | 0.5 | OEM-3-F | — | — | — |
| 14 | Spark out E | — | W26 | — | 0.5 | OEM-3-I | — | — | — |
| 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-R | — | — | — |
| 20 | Digital switched in 2 | — | W60 | — | 0.5 | OEM-4-B | — | — | — |
| 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) | — | W58 | — | 0.5 | OEM-3-T | — | — | — |
| 29 | Digital switched in 3 | — | W61 | — | 0.5 | OEM-4-C | — | — | — |
| 3 | Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 30 | Stepper IAC out 1B | — | W48 | — | 0.5 | OEM-4-D | — | — | — |
| 31 | Stepper IAC out 1A | — | — | — | — | — | — | — | — |
| 32 | Stepper IAC out 2A | — | — | — | — | — | — | — | — |
| 33 | Stepper IAC out 2B | — | — | — | — | — | — | — | — |
| 34 | Digital Frequency in 1 (VR+) | — | W64 | — | 0.5 | OEM-4-I | — | — | — |
| 35 | Digital Frequency in 1 (VR−) | — | W65 | — | 0.5 | OEM-4-J | — | — | — |
| 4 | Injector out C | — | W45 | — | 0.5 | OEM-3-E | — | — | — |
| 5 | Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 6 | Injector out D | — | W46 | — | 0.5 | OEM-3-M | — | — | — |
| 7 | Ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 8 | Injector out E | — | W47 | — | 0.5 | OEM-3-U | — | — | — |
| 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-2-Q | — | — | — |
| 10 | Digital switched in 5 | — | W63 | — | 0.5 | OEM-4-H | — | — | — |
| 11 | Digital switched in 4 | — | W62 | — | 0.5 | OEM-4-F | — | — | — |
| 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-P | — | — | — |
| 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-3-H | — | — | — |
| 4 | Digital out 1 | — | W33 | — | 0.5 | OEM-2-K | — | — | — |
| 5 | Digital I/O 4 | — | — | — | — | — | — | — | — |
| 6 | Digital I/O 2 | — | — | — | — | — | — | — | — |
| 7 | Analog in 8 | — | — | — | — | — | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Injector 1 | — | W27 | — | 0.5 | MS3PROEVOHC-A-3 | — | — | — |
| B | Cooling fan relay | — | W31 | — | 0.5 | MS3PROEVOHC-A-28 | — | — | — |
| C | Condenser fan relay | — | W32 | — | 0.5 | MS3PROEVOHC-A-14 | — | — | — |
| D | Injector 2 | — | W28 | — | 0.5 | MS3PROEVOHC-A-4 | — | — | — |
| E | EGR valve | — | W39 | — | 0.5 | MS3PROEVOHC-A-1 | — | — | — |
| F | EGR valve | — | W40 | — | 0.5 | MS3PROEVOHC-A-2 | — | — | — |
| G | Injector 3 | — | W29 | — | 0.5 | MS3PROEVOHC-B-1 | — | — | — |
| H | EGR valve | — | W41 | — | 0.5 | MS3PROEVOHC-A-5 | — | — | — |
| I | EGR valve | — | W42 | — | 0.5 | MS3PROEVOHC-B-11 | — | — | — |
| J | Injector 4 | — | W30 | — | 0.5 | MS3PROEVOHC-B-10 | — | — | — |
| K | A/C clutch relay | — | W33 | — | 0.5 | MS3PROEVOHC-C-4 | — | — | — |
| M | Fuel pump relay | — | W34 | — | 0.5 | MS3PROEVOHC-A-29 | — | — | — |
| N | VTCS solenoid (intake butterflies) | — | W43 | — | 0.5 | MS3PROEVOHC-B-12 | — | — | — |
| P | ISC valve +14V feed | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| Q | ISC valve low side | — | W38 | — | 0.5 | MS3PROEVOHC-C-1 | — | — | — |
| R | Malfunction indicator lamp (MIL) | — | 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 | — | — | — |
| D | EGR boost solenoid | — | — | — | — | — | — | — | — |
| E | Charcoal canister purge | — | W45 | — | 0.5 | MS3PROEVOHC-B-4 | — | — | — |
| F | Ignition 1 (coils 1+4, wasted spark) | — | W25 | — | 0.5 | MS3PROEVOHC-B-13 | — | — | — |
| H | Main relay | — | W35 | — | 0.5 | MS3PROEVOHC-C-3 | — | — | — |
| I | Ignition 2 (coils 2+3, wasted spark) | — | W26 | — | 0.5 | MS3PROEVOHC-B-14 | — | — | — |
| J | Front O2 heater | — | W36 | — | 0.5 | MS3PROEVOHC-A-30 | — | — | — |
| M | Alternator control | — | W46 | — | 0.5 | MS3PROEVOHC-B-6 | — | — | — |
| O | Tachometer output | — | W49 | — | 0.5 | MS3PROEVOHC-A-24 | — | — | — |
| P | Rear O2 heater | — | W37 | — | 0.5 | MS3PROEVOHC-C-2 | — | — | — |
| S | Immobiliser | — | W59 | — | 0.5 | MS3PROEVOHC-A-32 | — | — | — |
| T | Vehicle speed | — | W58 | — | 0.5 | MS3PROEVOHC-B-28 | — | — | — |
| U | Charge lamp | — | W47 | — | 0.5 | MS3PROEVOHC-B-8 | — | — | — |
| V | Cam position (CMP) | — | W22 | — | 0.5 | MS3PROEVOHC-A-26 | — | — | — |
| Y | Crank position (CKP) | — | W20 | — | 0.5 | MS3PROEVOHC-A-6 | — | — | — |
OEM-4
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| AA | Rear O2 signal | — | W53 | — | 0.5 | MS3PROEVOHC-A-25 | — | — | — |
| AD | Fuel level | — | W57 | — | 0.5 | MS3PROEVOHC-A-22 | — | — | — |
| AE | Pressure sensor (Mazda: EGR boost sensor) | — | W51 | — | 0.5 | MS3PROEVOHC-A-20 | — | — | — |
| AF | ECU power +14V (main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| AG | Constant +12V | — | — | — | — | — | — | — | — |
| B | Brake switch | — | W60 | — | 0.5 | MS3PROEVOHC-B-20 | — | — | — |
| C | Power steering pressure switch | — | W61 | — | 0.5 | MS3PROEVOHC-B-29 | — | — | — |
| D | VVT oil-control solenoid | — | W48 | — | 0.5 | MS3PROEVOHC-B-30 | — | — | — |
| F | A/C request | — | W62 | — | 0.5 | MS3PROEVOHC-C-11 | — | — | — |
| H | Neutral switch | — | W63 | — | 0.5 | MS3PROEVOHC-C-10 | — | — | — |
| I | Clutch switch | — | W64 | — | 0.5 | MS3PROEVOHC-B-34 | — | — | — |
| J | VTCS vacuum switch | — | W65 | — | 0.5 | MS3PROEVOHC-B-35 | — | — | — |
| L | +5V sensor supply | — | W19 | — | 0.5 | MS3PROEVOHC-A-8 | — | — | — |
| M | Knock sensor | — | W24 | — | 0.5 | MS3PROEVOHC-A-31 | — | — | — |
| N | Intake air temperature (IAT) | — | W56 | — | 0.5 | MS3PROEVOHC-A-11 | — | — | — |
| O | Signal ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| P | Coolant temperature (ECT) | — | W55 | — | 0.5 | MS3PROEVOHC-A-10 | — | — | — |
| V | Throttle position (TPS) | — | W52 | — | 0.5 | MS3PROEVOHC-A-9 | — | — | — |
| W | Front O2 signal | — | W54 | — | 0.5 | MS3PROEVOHC-A-21 | — | — | — |
| X | Mass air flow (MAF) | — | W50 | — | 0.5 | MS3PROEVOHC-A-19 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W11 | — | 0.5 | OEM-4-O | — | — | — |
| 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-2-P | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-4-AF | — | — | — |
| 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-4-A | — | — | — |
| 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-2-A | Injector 1 | injector_out | MS3PROEVOHC-A-3 | Injector out J | injector_out | single_source | |
| OEM-2-B | Cooling fan relay | low_side_out | MS3PROEVOHC-A-28 | Fuel pump relay out | low_side_out | single_source | |
| OEM-2-C | Condenser fan relay | low_side_out | MS3PROEVOHC-A-14 | PWM / Idle Out 1 | low_side_out | single_source | |
| OEM-2-D | Injector 2 | injector_out | MS3PROEVOHC-A-4 | Injector out I | injector_out | single_source | |
| OEM-2-E | EGR valve | low_side_out | MS3PROEVOHC-A-1 | High current out 1 | low_side_out | single_source | |
| OEM-2-F | EGR valve | low_side_out | MS3PROEVOHC-A-2 | High current out 2 | low_side_out | single_source | |
| OEM-2-G | Injector 3 | injector_out | MS3PROEVOHC-B-1 | Injector out A | injector_out | single_source | |
| OEM-2-H | EGR valve | low_side_out | MS3PROEVOHC-A-5 | High current out 3 | low_side_out | single_source | |
| OEM-2-I | EGR valve | low_side_out | MS3PROEVOHC-B-11 | Injector out G | injector_out | single_source | |
| OEM-2-J | Injector 4 | injector_out | MS3PROEVOHC-B-10 | Injector out F | injector_out | single_source | |
| OEM-2-K | A/C clutch relay | low_side_out | MS3PROEVOHC-C-4 | Digital out 1 | low_side_out | single_source | |
| OEM-2-M | Fuel pump relay | low_side_out | MS3PROEVOHC-A-29 | PWM out 2 | low_side_out | single_source | |
| OEM-2-N | VTCS solenoid (intake butterflies) | low_side_out | MS3PROEVOHC-B-12 | Injector out H | injector_out | single_source | |
| OEM-2-P | ISC valve +14V feed | power_in | MS3PROEVOHC-A-35 | 12V+ switched power in | power_in | single_source | |
| OEM-2-Q | ISC valve low side | low_side_out | MS3PROEVOHC-C-1 | PWM out 5 | low_side_out | single_source | |
| OEM-2-R | Malfunction indicator lamp (MIL) | 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-D | EGR boost solenoid | — | — | — | — | single_source | |
| OEM-3-E | Charcoal canister purge | low_side_out | MS3PROEVOHC-B-4 | Injector out C | injector_out | single_source | |
| OEM-3-F | Ignition 1 (coils 1+4, wasted spark) | ignition_out | MS3PROEVOHC-B-13 | Spark out G | ignition_out | single_source | |
| OEM-3-H | Main relay | low_side_out | MS3PROEVOHC-C-3 | Digital out 2 | low_side_out | single_source | |
| OEM-3-I | Ignition 2 (coils 2+3, wasted spark) | ignition_out | MS3PROEVOHC-B-14 | Spark out E | ignition_out | single_source | |
| OEM-3-J | Front O2 heater | low_side_out | MS3PROEVOHC-A-30 | PWM out 3 | low_side_out | single_source | |
| OEM-3-M | Alternator control | low_side_out | MS3PROEVOHC-B-6 | Injector out D | injector_out | single_source | |
| OEM-3-O | Tachometer output | tacho_out | MS3PROEVOHC-A-24 | Tach out | tacho_out | single_source | |
| OEM-3-P | Rear O2 heater | low_side_out | MS3PROEVOHC-C-2 | PWM out 4 | low_side_out | single_source | |
| OEM-3-S | Immobiliser | digital_in | MS3PROEVOHC-A-32 | Digital switched in 1 | digital_in | single_source | |
| OEM-3-T | Vehicle speed | digital_in | MS3PROEVOHC-B-28 | Digital frequency in 1 (unconditioned) | digital_in | single_source | |
| OEM-3-U | Charge lamp | low_side_out | MS3PROEVOHC-B-8 | Injector out E | injector_out | single_source | |
| OEM-3-V | Cam position (CMP) | trigger_in | MS3PROEVOHC-A-26 | CMP+ | trigger_in | single_source | |
| OEM-3-Y | Crank position (CKP) | trigger_in | MS3PROEVOHC-A-6 | CKP+ | trigger_in | single_source | |
| OEM-4-A | Power ground | ground | MS3PROEVOHC-B-3 + MS3PROEVOHC-B-5 + MS3PROEVOHC-B-7 + MS3PROEVOHC-B-9 | Ground + Ground + Ground + Ground | ground | single_source | |
| OEM-4-AA | Rear O2 signal | lambda_nb_in | MS3PROEVOHC-A-25 | O2 in | lambda_nb_in | single_source | |
| OEM-4-AD | Fuel level | analog_in | MS3PROEVOHC-A-22 | Analog In 4 | analog_in | single_source | |
| OEM-4-AE | Pressure sensor (Mazda: EGR boost sensor) | analog_in | MS3PROEVOHC-A-20 | Analog in 2 | analog_in | corroborated | |
| OEM-4-AF | ECU power +14V (main relay) | power_in | MS3PROEVOHC-A-35 | 12V+ switched power in | power_in | single_source | |
| OEM-4-AG | Constant +12V | power_in | — | — | — | single_source | |
| OEM-4-B | Brake switch | digital_in | MS3PROEVOHC-B-20 | Digital switched in 2 | digital_in | single_source | |
| OEM-4-C | Power steering pressure switch | digital_in | MS3PROEVOHC-B-29 | Digital switched in 3 | digital_in | single_source | |
| OEM-4-D | VVT oil-control solenoid | low_side_out | MS3PROEVOHC-B-30 | Stepper IAC out 1B | hbridge_out | single_source | |
| OEM-4-F | A/C request | digital_in | MS3PROEVOHC-C-11 | Digital switched in 4 | digital_in | single_source | |
| OEM-4-H | Neutral switch | digital_in | MS3PROEVOHC-C-10 | Digital switched in 5 | digital_in | single_source | |
| OEM-4-I | Clutch switch | digital_in | MS3PROEVOHC-B-34 | Digital Frequency in 1 (VR+) | digital_in | single_source | |
| OEM-4-J | VTCS vacuum switch | digital_in | MS3PROEVOHC-B-35 | Digital Frequency in 1 (VR−) | digital_in | single_source | |
| OEM-4-L | +5V sensor supply | vref | MS3PROEVOHC-A-8 | 5V+ VREF out | vref | single_source | |
| OEM-4-M | Knock sensor | knock_in | MS3PROEVOHC-A-31 | Knock in 1 | knock_in | single_source | |
| OEM-4-N | Intake air temperature (IAT) | temp_in | MS3PROEVOHC-A-11 | CLT in | temp_in | single_source | |
| OEM-4-O | 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-4-P | Coolant temperature (ECT) | temp_in | MS3PROEVOHC-A-10 | MAT in | temp_in | single_source | |
| OEM-4-V | Throttle position (TPS) | analog_in | MS3PROEVOHC-A-9 | TPS in | analog_in | single_source | |
| OEM-4-W | Front O2 signal | lambda_nb_in | MS3PROEVOHC-A-21 | Analog in 3 | analog_in | single_source | |
| OEM-4-X | Mass air flow (MAF) | analog_in | MS3PROEVOHC-A-19 | Analog in 1 | analog_in | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-2-P | SP-14V-1 | 0.85 | no route | ISC valve +14V feed | — | |
| W2 | OEM-4-AF | SP-14V-1 | 0.85 | no route | ECU power +14V (main relay) | — | |
| 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-4-A | 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-4-O | 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-4-L | MS3PROEVOHC-A-8 | 0.5 | no route | +5V sensor supply | — | |
| W20 | OEM-3-Y | MS3PROEVOHC-A-6 | 0.5 | no route | Crank position (CKP) | — | |
| W21 | SP-0V-1 | MS3PROEVOHC-A-15 | 0.5 | no route | CKP− | — | |
| W22 | OEM-3-V | MS3PROEVOHC-A-26 | 0.5 | no route | Cam position (CMP) | — | |
| W23 | SP-0V-1 | MS3PROEVOHC-A-27 | 0.5 | no route | CMP− | — | |
| W24 | OEM-4-M | MS3PROEVOHC-A-31 | 0.5 | no route | Knock sensor | — | |
| W25 | OEM-3-F | MS3PROEVOHC-B-13 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W26 | OEM-3-I | MS3PROEVOHC-B-14 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W27 | OEM-2-A | MS3PROEVOHC-A-3 | 0.5 | no route | Injector 1 | — | |
| W28 | OEM-2-D | MS3PROEVOHC-A-4 | 0.5 | no route | Injector 2 | — | |
| W29 | OEM-2-G | MS3PROEVOHC-B-1 | 0.5 | no route | Injector 3 | — | |
| W30 | OEM-2-J | MS3PROEVOHC-B-10 | 0.5 | no route | Injector 4 | — | |
| W31 | OEM-2-B | MS3PROEVOHC-A-28 | 0.5 | no route | Cooling fan relay | — | |
| W32 | OEM-2-C | MS3PROEVOHC-A-14 | 0.5 | no route | Condenser fan relay | — | |
| W33 | OEM-2-K | MS3PROEVOHC-C-4 | 0.5 | no route | A/C clutch relay | — | |
| W34 | OEM-2-M | MS3PROEVOHC-A-29 | 0.5 | no route | Fuel pump relay | — | |
| W35 | OEM-3-H | MS3PROEVOHC-C-3 | 0.5 | no route | Main relay | — | |
| W36 | OEM-3-J | MS3PROEVOHC-A-30 | 0.5 | no route | Front O2 heater | — | |
| W37 | OEM-3-P | MS3PROEVOHC-C-2 | 0.5 | no route | Rear O2 heater | — | |
| W38 | OEM-2-Q | MS3PROEVOHC-C-1 | 0.5 | no route | ISC valve low side | — | |
| W39 | OEM-2-E | MS3PROEVOHC-A-1 | 0.5 | no route | EGR valve | — | |
| W40 | OEM-2-F | MS3PROEVOHC-A-2 | 0.5 | no route | EGR valve | — | |
| W41 | OEM-2-H | MS3PROEVOHC-A-5 | 0.5 | no route | EGR valve | — | |
| W42 | OEM-2-I | MS3PROEVOHC-B-11 | 0.5 | no route | EGR valve | — | |
| W43 | OEM-2-N | MS3PROEVOHC-B-12 | 0.5 | no route | VTCS solenoid (intake butterflies) | — | |
| W44 | OEM-2-R | MS3PROEVOHC-B-2 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W45 | OEM-3-E | MS3PROEVOHC-B-4 | 0.5 | no route | Charcoal canister purge | — | |
| W46 | OEM-3-M | MS3PROEVOHC-B-6 | 0.5 | no route | Alternator control | — | |
| W47 | OEM-3-U | MS3PROEVOHC-B-8 | 0.5 | no route | Charge lamp | — | |
| W48 | OEM-4-D | MS3PROEVOHC-B-30 | 0.5 | no route | VVT oil-control solenoid | — | |
| W49 | OEM-3-O | MS3PROEVOHC-A-24 | 0.5 | no route | Tachometer output | — | |
| W50 | OEM-4-X | MS3PROEVOHC-A-19 | 0.5 | no route | Mass air flow (MAF) | — | |
| W51 | OEM-4-AE | MS3PROEVOHC-A-20 | 0.5 | no route | Pressure sensor (Mazda: EGR boost sensor) | — | |
| W52 | OEM-4-V | MS3PROEVOHC-A-9 | 0.5 | no route | Throttle position (TPS) | — | |
| W53 | OEM-4-AA | MS3PROEVOHC-A-25 | 0.5 | no route | Rear O2 signal | — | |
| W54 | OEM-4-W | MS3PROEVOHC-A-21 | 0.5 | no route | Front O2 signal | — | |
| W55 | OEM-4-P | MS3PROEVOHC-A-10 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W56 | OEM-4-N | MS3PROEVOHC-A-11 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W57 | OEM-4-AD | MS3PROEVOHC-A-22 | 0.5 | no route | Fuel level | — | |
| W58 | OEM-3-T | MS3PROEVOHC-B-28 | 0.5 | no route | Vehicle speed | — | |
| W59 | OEM-3-S | MS3PROEVOHC-A-32 | 0.5 | no route | Immobiliser | — | |
| W60 | OEM-4-B | MS3PROEVOHC-B-20 | 0.5 | no route | Brake switch | — | |
| W61 | OEM-4-C | MS3PROEVOHC-B-29 | 0.5 | no route | Power steering pressure switch | — | |
| W62 | OEM-4-F | MS3PROEVOHC-C-11 | 0.5 | no route | A/C request | — | |
| W63 | OEM-4-H | MS3PROEVOHC-C-10 | 0.5 | no route | Neutral switch | — | |
| W64 | OEM-4-I | MS3PROEVOHC-B-34 | 0.5 | no route | Clutch switch | — | |
| W65 | OEM-4-J | MS3PROEVOHC-B-35 | 0.5 | no route | VTCS vacuum switch | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (9)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-4-D ↔ MS3PROEVOHC-B-30 | OEM-4-D "VVT oil-control solenoid" [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 | OEM-2-I ↔ MS3PROEVOHC-B-11 | OEM-2-I "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-N ↔ MS3PROEVOHC-B-12 | OEM-2-N "VTCS solenoid (intake butterflies)" [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-R ↔ MS3PROEVOHC-B-2 | OEM-2-R "Malfunction indicator lamp (MIL)" [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-E ↔ MS3PROEVOHC-B-4 | OEM-3-E "Charcoal canister purge" [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-M ↔ MS3PROEVOHC-B-6 | OEM-3-M "Alternator control" [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-U ↔ MS3PROEVOHC-B-8 | OEM-3-U "Charge lamp" [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. |
| info | NET_FAMILY | OEM-4-O ↔ MS3PROEVOHC-A-15 | OEM-4-O "Signal ground" [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 | 1 optional OEM pins are not mapped: OEM-3-D EGR boost solenoid |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-4-AG | 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 2026-10-09. Review every wire against both manuals before building. Not wired: - OEM-4 AG: Constant +12V: AMP EFI MS3Pro EVO+ HC has no battery-constant input; not needed - OEM-3 D: EGR boost solenoid: 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 | 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 MX5NB2X install manual (NB2 2001-05) | https://linkecu.com/documentation/MX5XNB2.pdf | archive | 2026-10-05 | 741efdd9f2c8 |
| 4 | oem_manual | Mazda MX-5 NB2 (2003) wiring diagram — engine / starting / charging | https://web.archive.org/web/20191104195207/http://mellens.net/mazda/mazda_miata_extra_manual/2003_wiring.pdf | — | 2026-10-05 | 5ee0777f12c1 |
| 2 | expert_report | Justin Barrera — Miata NA/NB wiring corrections | — | — | — | — |