MX-5 Miata NB2 2001-05 (BP-Z3, VVT) → AMP EFI MS3Pro Mini (auto)
MX-5 Miata NB2 2001-05 (BP-Z3, VVT) — AMP EFI — MS3Pro Mini
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-07
Before you start
| Status | proposal · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | none |
| Size of the job | 35 wires · 7 connectors · 0 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Order of work | 1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up. |
Build checklist
Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.
| Wire | From | To | Gauge | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-2-P | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-4-AF | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | MS3PROMINI-A-1 | 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 | MS3PROMINI-A-22 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | MS3PROMINI-A-23 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-4-O | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-0V-1 | MS3PROMINI-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-4-L | MS3PROMINI-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-3-Y | MS3PROMINI-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-3-V | MS3PROMINI-A-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-3-F | MS3PROMINI-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-3-I | MS3PROMINI-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-2-A | MS3PROMINI-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-2-D | MS3PROMINI-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-2-G | MS3PROMINI-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-2-J | MS3PROMINI-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-2-B | MS3PROMINI-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-2-C | MS3PROMINI-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-2-K | MS3PROMINI-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-2-M | MS3PROMINI-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-3-H | MS3PROMINI-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-2-Q | MS3PROMINI-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-4-X | MS3PROMINI-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-4-V | MS3PROMINI-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-4-AA | MS3PROMINI-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-4-W | MS3PROMINI-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-4-P | MS3PROMINI-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-4-N | MS3PROMINI-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-4-AD | MS3PROMINI-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-3-T | MS3PROMINI-A-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-3-S | MS3PROMINI-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-4-B | MS3PROMINI-A-35 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ |
Bench test (before first power-up)
Battery disconnected, ECU and every sensor unplugged. Meter on resistance. Each pair below must read open (OL): a reading means a pinched wire, a stray strand or a mis-pinned cavity. Then check continuity of every wire (last column of the build checklist).
| # | Probe A | Probe B | Expect | Why | Reading |
|---|---|---|---|---|---|
| 1 | MS3PROMINI-A-1 | MS3PROMINI-A-21 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | MS3PROMINI-A-1 | MS3PROMINI-A-22 | open (OL) | +12 V supply must not touch power ground | |
| 3 | MS3PROMINI-A-2 | MS3PROMINI-A-21 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 4 | MS3PROMINI-A-1 | MS3PROMINI-A-2 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 5 | MS3PROMINI-A-22 | MS3PROMINI-A-2 | open (OL) | power ground must not touch 5 V sensor reference |
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
MS3PROMINI-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 12V+ switched power in | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 10 | Injector out F | — | W16 | — | 0.5 | OEM-2-A | — | — | — |
| 11 | Injector out G | — | W17 | — | 0.5 | OEM-2-D | — | — | — |
| 12 | Injector out H | — | W18 | — | 0.5 | OEM-2-G | — | — | — |
| 13 | Analog in 1 | — | W26 | — | 0.5 | OEM-4-X | — | — | — |
| 14 | Analog in 2 | — | W28 | — | 0.5 | OEM-4-AA | — | — | — |
| 15 | Analog in 3 | — | W29 | — | 0.5 | OEM-4-W | — | — | — |
| 16 | Analog in 4 | — | W32 | — | 0.5 | OEM-4-AD | — | — | — |
| 17 | Spark out A | — | W14 | — | 0.5 | OEM-3-F | — | — | — |
| 18 | Spark out B | — | W15 | — | 0.5 | OEM-3-I | — | — | — |
| 19 | Spark out C | — | — | — | — | — | — | — | — |
| 2 | +5V VREF out | — | W11 | — | 0.5 | OEM-4-L | — | — | — |
| 20 | Spark out D | — | — | — | — | — | — | — | — |
| 21 | Sensor ground | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 23 | Power ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 24 | CAN Low | — | — | — | — | — | — | — | — |
| 25 | CAN High | — | — | — | — | — | — | — | — |
| 26 | CLT in | — | W30 | — | 0.5 | OEM-4-P | — | — | — |
| 27 | IAT in | — | W31 | — | 0.5 | OEM-4-N | — | — | — |
| 28 | TPS in | — | W27 | — | 0.5 | OEM-4-V | — | — | — |
| 29 | Digital switched in 1 / Flex fuel | — | W34 | — | 0.5 | OEM-3-S | — | — | — |
| 3 | PWM out 1 / Idle | — | W21 | — | 0.5 | OEM-2-C | — | — | — |
| 30 | CKP+ | — | W12 | — | 0.5 | OEM-3-Y | — | — | — |
| 31 | CKP- | — | — | — | — | — | — | — | — |
| 32 | CMP+ | — | W13 | — | 0.5 | OEM-3-V | — | — | — |
| 33 | CMP- | — | — | — | — | — | — | — | — |
| 34 | Digital frequency in 1 (Hall) | — | W33 | — | 0.5 | OEM-3-T | — | — | — |
| 35 | Digital frequency in 2 (Hall) | — | W35 | — | 0.5 | OEM-4-B | — | — | — |
| 4 | Fuel pump out | — | W20 | — | 0.5 | OEM-2-B | — | — | — |
| 5 | Injector out A | — | W19 | — | 0.5 | OEM-2-J | — | — | — |
| 6 | Injector out B | — | W22 | — | 0.5 | OEM-2-K | — | — | — |
| 7 | Injector out C | — | W23 | — | 0.5 | OEM-2-M | — | — | — |
| 8 | Injector out D | — | W24 | — | 0.5 | OEM-3-H | — | — | — |
| 9 | Injector out E | — | W25 | — | 0.5 | OEM-2-Q | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Injector 1 | — | W16 | — | 0.5 | MS3PROMINI-A-10 | — | — | — |
| B | Cooling fan relay | — | W20 | — | 0.5 | MS3PROMINI-A-4 | — | — | — |
| C | Condenser fan relay | — | W21 | — | 0.5 | MS3PROMINI-A-3 | — | — | — |
| D | Injector 2 | — | W17 | — | 0.5 | MS3PROMINI-A-11 | — | — | — |
| E | EGR valve | — | — | — | — | — | — | — | — |
| F | EGR valve | — | — | — | — | — | — | — | — |
| G | Injector 3 | — | W18 | — | 0.5 | MS3PROMINI-A-12 | — | — | — |
| H | EGR valve | — | — | — | — | — | — | — | — |
| I | EGR valve | — | — | — | — | — | — | — | — |
| J | Injector 4 | — | W19 | — | 0.5 | MS3PROMINI-A-5 | — | — | — |
| K | A/C clutch relay | — | W22 | — | 0.5 | MS3PROMINI-A-6 | — | — | — |
| M | Fuel pump relay | — | W23 | — | 0.5 | MS3PROMINI-A-7 | — | — | — |
| N | VTCS solenoid (intake butterflies) | — | — | — | — | — | — | — | — |
| P | ISC valve +14V feed | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| Q | ISC valve low side | — | W25 | — | 0.5 | MS3PROMINI-A-9 | — | — | — |
| R | Malfunction indicator lamp (MIL) | — | — | — | — | — | — | — | — |
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 | — | — | — | — | — | — | — | — |
| F | Ignition 1 (coils 1+4, wasted spark) | — | W14 | — | 0.5 | MS3PROMINI-A-17 | — | — | — |
| H | Main relay | — | W24 | — | 0.5 | MS3PROMINI-A-8 | — | — | — |
| I | Ignition 2 (coils 2+3, wasted spark) | — | W15 | — | 0.5 | MS3PROMINI-A-18 | — | — | — |
| J | Front O2 heater | — | — | — | — | — | — | — | — |
| M | Alternator control | — | — | — | — | — | — | — | — |
| O | Tachometer output | — | — | — | — | — | — | — | — |
| P | Rear O2 heater | — | — | — | — | — | — | — | — |
| S | Immobiliser | — | W34 | — | 0.5 | MS3PROMINI-A-29 | — | — | — |
| T | Vehicle speed | — | W33 | — | 0.5 | MS3PROMINI-A-34 | — | — | — |
| U | Charge lamp | — | — | — | — | — | — | — | — |
| V | Cam position (CMP) | — | W13 | — | 0.5 | MS3PROMINI-A-32 | — | — | — |
| Y | Crank position (CKP) | — | W12 | — | 0.5 | MS3PROMINI-A-30 | — | — | — |
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 | — | W28 | — | 0.5 | MS3PROMINI-A-14 | — | — | — |
| AD | Fuel level | — | W32 | — | 0.5 | MS3PROMINI-A-16 | — | — | — |
| AF | ECU power +14V (main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| AG | Constant +12V | — | — | — | — | — | — | — | — |
| B | Brake switch | — | W35 | — | 0.5 | MS3PROMINI-A-35 | — | — | — |
| C | Power steering pressure switch | — | — | — | — | — | — | — | — |
| D | VVT oil-control solenoid | — | — | — | — | — | — | — | — |
| F | A/C request | — | — | — | — | — | — | — | — |
| H | Neutral switch | — | — | — | — | — | — | — | — |
| I | Clutch switch | — | — | — | — | — | — | — | — |
| J | VTCS vacuum switch | — | — | — | — | — | — | — | — |
| L | +5V sensor supply | — | W11 | — | 0.5 | MS3PROMINI-A-2 | — | — | — |
| M | Knock sensor | — | — | — | — | — | — | — | — |
| N | Intake air temperature (IAT) | — | W31 | — | 0.5 | MS3PROMINI-A-27 | — | — | — |
| O | Signal ground | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| P | Coolant temperature (ECT) | — | W30 | — | 0.5 | MS3PROMINI-A-26 | — | — | — |
| V | Throttle position (TPS) | — | W27 | — | 0.5 | MS3PROMINI-A-28 | — | — | — |
| W | Front O2 signal | — | W29 | — | 0.5 | MS3PROMINI-A-15 | — | — | — |
| X | Mass air flow (MAF) | — | W26 | — | 0.5 | MS3PROMINI-A-13 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W9 | — | 0.5 | OEM-4-O | — | — | — |
| 1 | — | — | W10 | — | 0.5 | MS3PROMINI-A-21 | — | — | — |
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 | MS3PROMINI-A-1 | — | — | — |
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 | MS3PROMINI-A-22 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | MS3PROMINI-A-23 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-2-A | Injector 1 | injector_out | MS3PROMINI-A-10 | Injector out F | injector_out | single_source | |
| OEM-2-B | Cooling fan relay | low_side_out | MS3PROMINI-A-4 | Fuel pump out | low_side_out | single_source | |
| OEM-2-C | Condenser fan relay | low_side_out | MS3PROMINI-A-3 | PWM out 1 / Idle | low_side_out | single_source | |
| OEM-2-D | Injector 2 | injector_out | MS3PROMINI-A-11 | Injector out G | injector_out | single_source | |
| OEM-2-E | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-2-F | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-2-G | Injector 3 | injector_out | MS3PROMINI-A-12 | Injector out H | injector_out | single_source | |
| OEM-2-H | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-2-I | EGR valve | low_side_out | — | — | — | single_source | |
| OEM-2-J | Injector 4 | injector_out | MS3PROMINI-A-5 | Injector out A | injector_out | single_source | |
| OEM-2-K | A/C clutch relay | low_side_out | MS3PROMINI-A-6 | Injector out B | injector_out | single_source | |
| OEM-2-M | Fuel pump relay | low_side_out | MS3PROMINI-A-7 | Injector out C | injector_out | single_source | |
| OEM-2-N | VTCS solenoid (intake butterflies) | low_side_out | — | — | — | single_source | |
| OEM-2-P | ISC valve +14V feed | power_in | MS3PROMINI-A-1 | 12V+ switched power in | power_in | single_source | |
| OEM-2-Q | ISC valve low side | low_side_out | MS3PROMINI-A-9 | Injector out E | injector_out | single_source | |
| OEM-2-R | Malfunction indicator lamp (MIL) | low_side_out | — | — | — | single_source | |
| OEM-3-A | Power ground | ground | MS3PROMINI-A-22 + MS3PROMINI-A-23 | Power ground + Power ground | ground | single_source | |
| OEM-3-B | Power ground | ground | MS3PROMINI-A-22 + MS3PROMINI-A-23 | Power ground + Power ground | ground | single_source | |
| OEM-3-D | EGR boost solenoid | low_side_out | — | — | — | single_source | |
| OEM-3-E | Charcoal canister purge | low_side_out | — | — | — | single_source | |
| OEM-3-F | Ignition 1 (coils 1+4, wasted spark) | ignition_out | MS3PROMINI-A-17 | Spark out A | ignition_out | single_source | |
| OEM-3-H | Main relay | low_side_out | MS3PROMINI-A-8 | Injector out D | injector_out | single_source | |
| OEM-3-I | Ignition 2 (coils 2+3, wasted spark) | ignition_out | MS3PROMINI-A-18 | Spark out B | ignition_out | single_source | |
| OEM-3-J | Front O2 heater | low_side_out | — | — | — | single_source | |
| OEM-3-M | Alternator control | low_side_out | — | — | — | single_source | |
| OEM-3-O | Tachometer output | tacho_out | — | — | — | single_source | |
| OEM-3-P | Rear O2 heater | low_side_out | — | — | — | single_source | |
| OEM-3-S | Immobiliser | digital_in | MS3PROMINI-A-29 | Digital switched in 1 / Flex fuel | digital_in | single_source | |
| OEM-3-T | Vehicle speed | digital_in | MS3PROMINI-A-34 | Digital frequency in 1 (Hall) | digital_in | single_source | |
| OEM-3-U | Charge lamp | low_side_out | — | — | — | single_source | |
| OEM-3-V | Cam position (CMP) | trigger_in | MS3PROMINI-A-32 | CMP+ | trigger_in | single_source | |
| OEM-3-Y | Crank position (CKP) | trigger_in | MS3PROMINI-A-30 | CKP+ | trigger_in | single_source | |
| OEM-4-A | Power ground | ground | MS3PROMINI-A-22 + MS3PROMINI-A-23 | Power ground + Power ground | ground | single_source | |
| OEM-4-AA | Rear O2 signal | lambda_nb_in | MS3PROMINI-A-14 | Analog in 2 | analog_in | single_source | |
| OEM-4-AD | Fuel level | analog_in | MS3PROMINI-A-16 | Analog in 4 | analog_in | single_source | |
| OEM-4-AF | ECU power +14V (main relay) | power_in | MS3PROMINI-A-1 | 12V+ switched power in | power_in | single_source | |
| OEM-4-AG | Constant +12V | power_in | — | — | — | single_source | |
| OEM-4-B | Brake switch | digital_in | MS3PROMINI-A-35 | Digital frequency in 2 (Hall) | digital_in | single_source | |
| OEM-4-C | Power steering pressure switch | digital_in | — | — | — | single_source | |
| OEM-4-D | VVT oil-control solenoid | low_side_out | — | — | — | single_source | |
| OEM-4-F | A/C request | digital_in | — | — | — | single_source | |
| OEM-4-H | Neutral switch | digital_in | — | — | — | single_source | |
| OEM-4-I | Clutch switch | digital_in | — | — | — | single_source | |
| OEM-4-J | VTCS vacuum switch | digital_in | — | — | — | single_source | |
| OEM-4-L | +5V sensor supply | vref | MS3PROMINI-A-2 | +5V VREF out | vref | single_source | |
| OEM-4-M | Knock sensor | knock_in | — | — | — | single_source | |
| OEM-4-N | Intake air temperature (IAT) | temp_in | MS3PROMINI-A-27 | IAT in | temp_in | single_source | |
| OEM-4-O | Signal ground | sensor_ground | MS3PROMINI-A-21 | Sensor ground | sensor_ground | single_source | |
| OEM-4-P | Coolant temperature (ECT) | temp_in | MS3PROMINI-A-26 | CLT in | temp_in | single_source | |
| OEM-4-V | Throttle position (TPS) | analog_in | MS3PROMINI-A-28 | TPS in | analog_in | single_source | |
| OEM-4-W | Front O2 signal | lambda_nb_in | MS3PROMINI-A-15 | Analog in 3 | analog_in | single_source | |
| OEM-4-X | Mass air flow (MAF) | analog_in | MS3PROMINI-A-13 | 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 | MS3PROMINI-A-1 | 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 | MS3PROMINI-A-22 | 0.85 | no route | Power ground | — | |
| W8 | SP-GND-1 | MS3PROMINI-A-23 | 0.85 | no route | Power ground | — | |
| W9 | OEM-4-O | SP-0V-1 | 0.5 | no route | Signal ground | — | |
| W10 | SP-0V-1 | MS3PROMINI-A-21 | 0.5 | no route | Sensor ground | — | |
| W11 | OEM-4-L | MS3PROMINI-A-2 | 0.5 | no route | +5V sensor supply | — | |
| W12 | OEM-3-Y | MS3PROMINI-A-30 | 0.5 | no route | Crank position (CKP) | — | |
| W13 | OEM-3-V | MS3PROMINI-A-32 | 0.5 | no route | Cam position (CMP) | — | |
| W14 | OEM-3-F | MS3PROMINI-A-17 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W15 | OEM-3-I | MS3PROMINI-A-18 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W16 | OEM-2-A | MS3PROMINI-A-10 | 0.5 | no route | Injector 1 | — | |
| W17 | OEM-2-D | MS3PROMINI-A-11 | 0.5 | no route | Injector 2 | — | |
| W18 | OEM-2-G | MS3PROMINI-A-12 | 0.5 | no route | Injector 3 | — | |
| W19 | OEM-2-J | MS3PROMINI-A-5 | 0.5 | no route | Injector 4 | — | |
| W20 | OEM-2-B | MS3PROMINI-A-4 | 0.5 | no route | Cooling fan relay | — | |
| W21 | OEM-2-C | MS3PROMINI-A-3 | 0.5 | no route | Condenser fan relay | — | |
| W22 | OEM-2-K | MS3PROMINI-A-6 | 0.5 | no route | A/C clutch relay | — | |
| W23 | OEM-2-M | MS3PROMINI-A-7 | 0.5 | no route | Fuel pump relay | — | |
| W24 | OEM-3-H | MS3PROMINI-A-8 | 0.5 | no route | Main relay | — | |
| W25 | OEM-2-Q | MS3PROMINI-A-9 | 0.5 | no route | ISC valve low side | — | |
| W26 | OEM-4-X | MS3PROMINI-A-13 | 0.5 | no route | Mass air flow (MAF) | — | |
| W27 | OEM-4-V | MS3PROMINI-A-28 | 0.5 | no route | Throttle position (TPS) | — | |
| W28 | OEM-4-AA | MS3PROMINI-A-14 | 0.5 | no route | Rear O2 signal | — | |
| W29 | OEM-4-W | MS3PROMINI-A-15 | 0.5 | no route | Front O2 signal | — | |
| W30 | OEM-4-P | MS3PROMINI-A-26 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W31 | OEM-4-N | MS3PROMINI-A-27 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W32 | OEM-4-AD | MS3PROMINI-A-16 | 0.5 | no route | Fuel level | — | |
| W33 | OEM-3-T | MS3PROMINI-A-34 | 0.5 | no route | Vehicle speed | — | |
| W34 | OEM-3-S | MS3PROMINI-A-29 | 0.5 | no route | Immobiliser | — | |
| W35 | OEM-4-B | MS3PROMINI-A-35 | 0.5 | no route | Brake 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 (5)
| Severity | Code | Subject | Message |
|---|---|---|---|
| info | NET_FAMILY | OEM-2-K ↔ MS3PROMINI-A-6 | OEM-2-K "A/C clutch relay" [low_side_out] is wired to MS3PROMINI-A-6 "Injector out B" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-M ↔ MS3PROMINI-A-7 | OEM-2-M "Fuel pump relay" [low_side_out] is wired to MS3PROMINI-A-7 "Injector out C" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-Q ↔ MS3PROMINI-A-9 | OEM-2-Q "ISC valve low side" [low_side_out] is wired to MS3PROMINI-A-9 "Injector out E" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-3-H ↔ MS3PROMINI-A-8 | OEM-3-H "Main relay" [low_side_out] is wired to MS3PROMINI-A-8 "Injector out D" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | UNMAPPED | OEM | 20 optional OEM pins are not mapped: OEM-2-E EGR valve; OEM-2-F EGR valve; OEM-2-H EGR valve; OEM-2-I EGR valve; OEM-2-N VTCS solenoid (intake butterflies); OEM-2-R Malfunction indicator lamp (MIL); OEM-3-D EGR boost solenoid; OEM-3-E Charcoal canister purge; OEM-3-J Front O2 heater; OEM-3-M Alternator control; OEM-3-O Tachometer output; OEM-3-P Rear O2 heater; OEM-3-U Charge lamp; OEM-4-C Power steering pressure switch; OEM-4-D VVT oil-control solenoid; OEM-4-F A/C request; OEM-4-H Neutral switch; OEM-4-I Clutch switch; OEM-4-J VTCS vacuum switch; OEM-4-M Knock sensor |
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 2026-10-06. Review every wire against both manuals before building. Not wired: - OEM-4 AG: Constant +12V: AMP EFI MS3Pro Mini has no battery-constant input; not needed - OEM-4 M: Knock sensor: no free knock input on AMP EFI MS3Pro Mini - OEM-3 J: Front O2 heater: no free heater_low_side/low_side/ls_hs/hbridge on AMP EFI MS3Pro Mini - OEM-3 P: Rear O2 heater: no free heater_low_side/low_side/ls_hs/hbridge on AMP EFI MS3Pro Mini - OEM-2 E: EGR valve: no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-2 F: EGR valve: no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-2 H: EGR valve: no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-2 I: EGR valve: no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-2 N: VTCS solenoid (intake butterflies): no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-2 R: Malfunction indicator lamp (MIL): no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-3 D: EGR boost solenoid: no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-3 E: Charcoal canister purge: no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-3 M: Alternator control: no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-3 U: Charge lamp: no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-4 D: VVT oil-control solenoid: no free low_side/ls_hs/injector/hbridge on AMP EFI MS3Pro Mini - OEM-3 O: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on AMP EFI MS3Pro Mini - OEM-4 C: Power steering pressure switch: no free switch_in/frequency_in/analog_0_5 on AMP EFI MS3Pro Mini - OEM-4 F: A/C request: no free switch_in/frequency_in/analog_0_5 on AMP EFI MS3Pro Mini - OEM-4 H: Neutral switch: no free switch_in/frequency_in/analog_0_5 on AMP EFI MS3Pro Mini - OEM-4 I: Clutch switch: no free switch_in/frequency_in/analog_0_5 on AMP EFI MS3Pro Mini - OEM-4 J: VTCS vacuum switch: no free switch_in/frequency_in/analog_0_5 on AMP EFI MS3Pro Mini
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | AMP EFI: MS3Pro Mini manual (fw 1.6.1) pinout & output ratings | https://cdn.shopify.com/s/files/1/0960/0014/7754/files/MS3Pro_User_Manual_Firmware_1.6.1_Mini.pdf?v=1760643335 | archive | 2026-10-05 | bed7d8ae8408 |
| 4 | vendor_doc | Link G4X MX5NB2X install manual (NB2 2001-05) | https://linkecu.com/documentation/MX5XNB2.pdf | archive | 2026-10-05 | 741efdd9f2c8 |