MX-5 Miata NA8 1994-95 (BP-ZE, 1.8, OBD-I) → Link G5 Voodoo Neo 4 (auto)
MX-5 Miata NA8 1994-95 (BP-ZE, 1.8, OBD-I) — Link — G5 Voodoo Neo 4
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-19
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.
| Status | proposal · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | none |
| Size of the job | 48 wires · 10 connectors · 2 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Order of work | 1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up. |
Build checklist
Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.
| Wire | From | To | Gauge | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-1-B | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | SP-14V-1 | G5VOODOONEO4-B-B5 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | NEW-KEYON-1 | MAIN-R-COIL+ | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | NEW-BATT-1 | MAIN-R-IN | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | MAIN-R-COIL- | SP-GND-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | MAIN-R-OUT | G5VOODOONEO4-A-A5 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-2-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-2-B | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | G5VOODOONEO4-A-A25 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | G5VOODOONEO4-A-A34 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | G5VOODOONEO4-B-B25 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-GND-1 | G5VOODOONEO4-B-B34 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-2-C | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-2-D | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-2-F | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | G5VOODOONEO4-A-A24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | G5VOODOONEO4-B-B22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-2-K | G5VOODOONEO4-A-A32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-2-E | G5VOODOONEO4-A-A8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-2-G | G5VOODOONEO4-A-A9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-1-G | G5VOODOONEO4-A-A13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-1-H | G5VOODOONEO4-A-A12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-2-U | G5VOODOONEO4-A-A4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-2-V | G5VOODOONEO4-A-A3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-2-Y | G5VOODOONEO4-A-A2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-2-Z | G5VOODOONEO4-A-A1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-2-O | G5VOODOONEO4-A-A14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-2-M | G5VOODOONEO4-A-A17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-2-Q | G5VOODOONEO4-A-A15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-1-J | G5VOODOONEO4-A-A21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-1-R | G5VOODOONEO4-A-A20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-2-S | G5VOODOONEO4-A-A19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-2-T | G5VOODOONEO4-A-A29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-1-L | G5VOODOONEO4-A-A28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-2-L | G5VOODOONEO4-A-A27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-2-W | G5VOODOONEO4-B-B30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-1-E | G5VOODOONEO4-B-B29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-2-R | G5VOODOONEO4-B-B10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-2-X | G5VOODOONEO4-B-B4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-2-N | G5VOODOONEO4-A-A22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-2-P | G5VOODOONEO4-A-A16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-1-M | G5VOODOONEO4-A-A30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-1-C | G5VOODOONEO4-A-A31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-1-O | G5VOODOONEO4-A-A23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-1-P | G5VOODOONEO4-B-B21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-1-Q | G5VOODOONEO4-B-B20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-1-V | G5VOODOONEO4-B-B19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | NEW-KEYON-1 | G5VOODOONEO4-A-A6 | 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 | G5VOODOONEO4-B-B5 | G5VOODOONEO4-A-A24 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | G5VOODOONEO4-B-B5 | G5VOODOONEO4-A-A25 | open (OL) | +12 V supply must not touch power ground | |
| 3 | G5VOODOONEO4-A-A24 | G5VOODOONEO4-A-A32 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 4 | G5VOODOONEO4-A-A24 | G5VOODOONEO4-A-A5 | open (OL) | sensor ground must not touch +12 V supply | |
| 5 | G5VOODOONEO4-A-A24 | NEW-BATT-1 | open (OL) | sensor ground must not touch +12 V supply | |
| 6 | G5VOODOONEO4-A-A24 | NEW-KEYON-1 | open (OL) | sensor ground must not touch +12 V supply | |
| 7 | G5VOODOONEO4-A-A25 | G5VOODOONEO4-A-A32 | open (OL) | power ground must not touch 5 V sensor reference | |
| 8 | G5VOODOONEO4-A-A25 | G5VOODOONEO4-A-A5 | open (OL) | power ground must not touch +12 V supply | |
| 9 | G5VOODOONEO4-A-A25 | NEW-BATT-1 | open (OL) | power ground must not touch +12 V supply | |
| 10 | G5VOODOONEO4-A-A25 | NEW-KEYON-1 | open (OL) | power ground must not touch +12 V supply | |
| 11 | G5VOODOONEO4-A-A32 | G5VOODOONEO4-A-A5 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 12 | G5VOODOONEO4-A-A32 | NEW-BATT-1 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 13 | G5VOODOONEO4-A-A32 | NEW-KEYON-1 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 14 | G5VOODOONEO4-B-B5 | G5VOODOONEO4-A-A32 | open (OL) | +12 V supply 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
G5VOODOONEO4-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A1 | Injection 4 | — | W26 | — | 0.5 | OEM-2-Z | — | — | — |
| A10 | Ignition 4 | — | — | — | — | — | — | — | — |
| A11 | Ignition 3 | — | — | — | — | — | — | — | — |
| A12 | Ignition 2 | — | W22 | — | 0.5 | OEM-1-H | — | — | — |
| A13 | Ignition 1 | — | W21 | — | 0.5 | OEM-1-G | — | — | — |
| A14 | ADIO 1 | — | W27 | — | 0.5 | OEM-2-O | — | — | — |
| A15 | Analogue Temp 1 | — | W29 | — | 0.5 | OEM-2-Q | — | — | — |
| A16 | Analogue Temp 2 | — | W41 | — | 0.5 | OEM-2-P | — | — | — |
| A17 | Analogue Volt 1 | — | W28 | — | 0.5 | OEM-2-M | — | — | — |
| A18 | Aux 3 / H-Bridge 1 | — | — | — | — | — | — | — | — |
| A19 | Aux 7 / Digital Input 7 | — | W32 | — | 0.5 | OEM-2-S | — | — | — |
| A2 | Injection 3 | — | W25 | — | 0.5 | OEM-2-Y | — | — | — |
| A20 | Aux 2 | — | W31 | — | 0.5 | OEM-1-R | — | — | — |
| A21 | Aux 1 | — | W30 | — | 0.5 | OEM-1-J | — | — | — |
| A22 | Analogue Volt 2 | — | W40 | — | 0.5 | OEM-2-N | — | — | — |
| A23 | Digital Input 3 | — | W44 | — | 0.5 | OEM-1-O | — | — | — |
| A24 | Sensor Ground | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| A25 | Ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| A26 | Aux 4 / H-Bridge 1 | — | — | — | — | — | — | — | — |
| A27 | Aux 10 / Digital Input 10 | — | W35 | — | 0.5 | OEM-2-L | — | — | — |
| A28 | Aux 9 / Digital Input 9 | — | W34 | — | 0.5 | OEM-1-L | — | — | — |
| A29 | Aux 8 / Digital Input 8 | — | W33 | — | 0.5 | OEM-2-T | — | — | — |
| A3 | Injection 2 | — | W24 | — | 0.5 | OEM-2-V | — | — | — |
| A30 | Digital Input 1 | — | W42 | — | 0.5 | OEM-1-M | — | — | — |
| A31 | Digital Input 2 | — | W43 | — | 0.5 | OEM-1-C | — | — | — |
| A32 | +5V Out | — | W18 | — | 0.5 | OEM-2-K | — | — | — |
| A33 | Analogue Volt 3 | — | — | — | — | — | — | — | — |
| A34 | Ground | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| A4 | Injection 1 | — | W23 | — | 0.5 | OEM-2-U | — | — | — |
| A5 | +14V | — | W6 | — | 0.85 | MAIN-R-OUT | — | — | — |
| A6 | Ignition Switch | — | W48 | — | 0.5 | NEW-KEYON-1 | — | — | — |
| A7 | Shield Ground | — | — | — | — | — | — | — | — |
| A8 | Trigger 1 | — | W19 | — | 0.5 | OEM-2-E | — | — | — |
| A9 | Trigger 2 | — | W20 | — | 0.5 | OEM-2-G | — | — | — |
G5VOODOONEO4-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| B1 | Injection 8 | — | — | — | — | — | — | — | — |
| B10 | Heat | — | W38 | — | 0.5 | OEM-2-R | — | — | — |
| B11 | MES | — | — | — | — | — | — | — | — |
| B12 | Ignition 6 | — | — | — | — | — | — | — | — |
| B13 | Ignition 5 | — | — | — | — | — | — | — | — |
| B14 | RE | — | — | — | — | — | — | — | — |
| B15 | ADIO 3 | — | — | — | — | — | — | — | — |
| B16 | ADIO 4 | — | — | — | — | — | — | — | — |
| B17 | Shield Ground | — | — | — | — | — | — | — | — |
| B18 | Aux 5 / H-Bridge 2 | — | — | — | — | — | — | — | — |
| B19 | Digital Input 6 | — | W47 | — | 0.5 | OEM-1-V | — | — | — |
| B2 | Injection 7 | — | — | — | — | — | — | — | — |
| B20 | Digital Input 5 / K-Line | — | W46 | — | 0.5 | OEM-1-Q | — | — | — |
| B21 | Digital Input 4 | — | W45 | — | 0.5 | OEM-1-P | — | — | — |
| B22 | Sensor Ground | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| B23 | ADIO 5 | — | — | — | — | — | — | — | — |
| B24 | ADIO 6 | — | — | — | — | — | — | — | — |
| B25 | Ground | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| B26 | Aux 6 / H-Bridge 2 | — | — | — | — | — | — | — | — |
| B27 | CAN 2 High | — | — | — | — | — | — | — | — |
| B28 | CAN 2 Low | — | — | — | — | — | — | — | — |
| B29 | Aux 12 | — | W37 | — | 0.5 | OEM-1-E | — | — | — |
| B3 | Injection 6 | — | — | — | — | — | — | — | — |
| B30 | Aux 11 | — | W36 | — | 0.5 | OEM-2-W | — | — | — |
| B31 | IPE | — | — | — | — | — | — | — | — |
| B32 | APE | — | — | — | — | — | — | — | — |
| B33 | ADIO 2 | — | — | — | — | — | — | — | — |
| B34 | Ground | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| B4 | Injection 5 | — | W39 | — | 0.5 | OEM-2-X | — | — | — |
| B5 | +14V E-Throttle | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| B6 | Analogue Temp 3 | — | — | — | — | — | — | — | — |
| B7 | Analogue Temp 4 | — | — | — | — | — | — | — | — |
| B8 | Knock 2 | — | — | — | — | — | — | — | — |
| B9 | Knock 1 | — | — | — | — | — | — | — | — |
MAIN-R
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| COIL+ | Relay coil positive (ignition-switched +12V) | — | W3 | — | 0.5 | NEW-KEYON-1 | — | — | — |
| COIL- | Relay coil negative (ECU low-side driver) | — | W5 | — | 0.5 | SP-GND-1 | — | — | — |
| IN | Relay contact input (battery + via main fuse) | — | W4 | — | 0.85 | NEW-BATT-1 | — | — | — |
| OUT | Relay contact output (switched +12V bus) | — | W6 | — | 0.85 | G5VOODOONEO4-A-A5 | — | — | — |
NEW-BATT
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | MAIN-R-IN | — | — | — |
NEW-KEYON
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W3 | — | 0.5 | MAIN-R-COIL+ | — | — | — |
| 1 | — | — | W48 | — | 0.5 | G5VOODOONEO4-A-A6 | — | — | — |
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Constant +12V | — | — | — | — | — | — | — | — |
| B | ECU power +14V (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| C | Starter input (12V while cranking) | — | W43 | — | 0.5 | G5VOODOONEO4-A-A31 | — | — | — |
| D | Data link connector | — | — | — | — | — | — | — | — |
| E | Malfunction indicator lamp (MIL) | — | W37 | — | 0.5 | G5VOODOONEO4-B-B29 | — | — | — |
| G | Ignition 1 (coils 1+4, wasted spark) | — | W21 | — | 0.5 | G5VOODOONEO4-A-A13 | — | — | — |
| H | Ignition 2 (coils 2+3, wasted spark) | — | W22 | — | 0.5 | G5VOODOONEO4-A-A12 | — | — | — |
| I | Powertrain control module (transmission) | — | — | — | — | — | — | — | — |
| J | A/C relay | — | W30 | — | 0.5 | G5VOODOONEO4-A-A21 | — | — | — |
| L | Coolant fan relay | — | W34 | — | 0.5 | G5VOODOONEO4-A-A28 | — | — | — |
| M | Vehicle speed | — | W42 | — | 0.5 | G5VOODOONEO4-A-A30 | — | — | — |
| N | Powertrain control module (transmission) | — | — | — | — | — | — | — | — |
| O | Stop light switch | — | W44 | — | 0.5 | G5VOODOONEO4-A-A23 | — | — | — |
| P | Power steering pressure switch | — | W45 | — | 0.5 | G5VOODOONEO4-B-B21 | — | — | — |
| Q | A/C request | — | W46 | — | 0.5 | G5VOODOONEO4-B-B20 | — | — | — |
| R | Cooling fan relay | — | W31 | — | 0.5 | G5VOODOONEO4-A-A20 | — | — | — |
| S | Heater control unit | — | — | — | — | — | — | — | — |
| T | Unknown | — | — | — | — | — | — | — | — |
| U | Unknown | — | — | — | — | — | — | — | — |
| V | Neutral/clutch switch | — | W47 | — | 0.5 | G5VOODOONEO4-B-B19 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| C | Sensor ground (E2) | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| D | Sensor ground (E2) | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| E | Crank position (CAS NE) | — | W19 | — | 0.5 | G5VOODOONEO4-A-A8 | — | — | — |
| F | MAF ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| G | Cam position (CAS G) | — | W20 | — | 0.5 | G5VOODOONEO4-A-A9 | — | — | — |
| H | Data link connector | — | — | — | — | — | — | — | — |
| I | Tachometer output | — | — | — | — | — | — | — | — |
| J | EGR function sensor | — | — | — | — | — | — | — | — |
| K | +5V sensor supply | — | W18 | — | 0.5 | G5VOODOONEO4-A-A32 | — | — | — |
| L | Rear defroster relay | — | W35 | — | 0.5 | G5VOODOONEO4-A-A27 | — | — | — |
| M | Throttle position (TPS) | — | W28 | — | 0.5 | G5VOODOONEO4-A-A17 | — | — | — |
| N | O2 sensor | — | W40 | — | 0.5 | G5VOODOONEO4-A-A22 | — | — | — |
| O | Mass air flow (MAF) | — | W27 | — | 0.5 | G5VOODOONEO4-A-A14 | — | — | — |
| P | Intake air temperature (IAT) | — | W41 | — | 0.5 | G5VOODOONEO4-A-A16 | — | — | — |
| Q | Coolant temperature (ECT) | — | W29 | — | 0.5 | G5VOODOONEO4-A-A15 | — | — | — |
| R | PRC solenoid (fuel pressure regulator) | — | W38 | — | 0.5 | G5VOODOONEO4-B-B10 | — | — | — |
| S | Condenser fan relay | — | W32 | — | 0.5 | G5VOODOONEO4-A-A19 | — | — | — |
| T | Fuel pump relay | — | W33 | — | 0.5 | G5VOODOONEO4-A-A29 | — | — | — |
| U | Injector 1 | — | W23 | — | 0.5 | G5VOODOONEO4-A-A4 | — | — | — |
| V | Injector 2 | — | W24 | — | 0.5 | G5VOODOONEO4-A-A3 | — | — | — |
| W | ISC solenoid | — | W36 | — | 0.5 | G5VOODOONEO4-B-B30 | — | — | — |
| X | Evap purge solenoid | — | W39 | — | 0.5 | G5VOODOONEO4-B-B4 | — | — | — |
| Y | Injector 3 | — | W25 | — | 0.5 | G5VOODOONEO4-A-A2 | — | — | — |
| Z | Injector 4 | — | W26 | — | 0.5 | G5VOODOONEO4-A-A1 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W13 | — | 0.5 | OEM-2-C | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-2-D | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-2-F | — | — | — |
| 1 | — | — | W16 | — | 0.5 | G5VOODOONEO4-A-A24 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | G5VOODOONEO4-B-B22 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-1-B | — | — | — |
| 1 | — | — | W2 | — | 0.85 | G5VOODOONEO4-B-B5 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.5 | MAIN-R-COIL- | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-2-A | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-2-B | — | — | — |
| 1 | — | — | W9 | — | 0.85 | G5VOODOONEO4-A-A25 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | G5VOODOONEO4-A-A34 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | G5VOODOONEO4-B-B25 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | G5VOODOONEO4-B-B34 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-1-A | Constant +12V | power_in | — | — | — | LR | single_source |
| OEM-1-B | ECU power +14V (main relay) | power_in | G5VOODOONEO4-B-B5 | +14V E-Throttle | power_in | WR | single_source |
| OEM-1-C | Starter input (12V while cranking) | digital_in | G5VOODOONEO4-A-A31 | Digital Input 2 | digital_in | V | corroborated |
| OEM-1-D | Data link connector | serial | — | — | — | WG | single_source |
| OEM-1-E | Malfunction indicator lamp (MIL) | low_side_out | G5VOODOONEO4-B-B29 | Aux 12 | low_side_out | YB | single_source |
| OEM-1-G | Ignition 1 (coils 1+4, wasted spark) | ignition_out | G5VOODOONEO4-A-A13 | Ignition 1 | ignition_out | BrY | single_source |
| OEM-1-H | Ignition 2 (coils 2+3, wasted spark) | ignition_out | G5VOODOONEO4-A-A12 | Ignition 2 | ignition_out | Br | single_source |
| OEM-1-I | Powertrain control module (transmission) | — | — | — | — | LW | single_source |
| OEM-1-J | A/C relay | low_side_out | G5VOODOONEO4-A-A21 | Aux 1 | low_side_out | single_source | |
| OEM-1-L | Coolant fan relay | low_side_out | G5VOODOONEO4-A-A28 | Aux 9 / Digital Input 9 | low_side_out | BG | single_source |
| OEM-1-M | Vehicle speed | digital_in | G5VOODOONEO4-A-A30 | Digital Input 1 | digital_in | GR | single_source |
| OEM-1-N | Powertrain control module (transmission) | — | — | — | — | R | single_source |
| OEM-1-O | Stop light switch | digital_in | G5VOODOONEO4-A-A23 | Digital Input 3 | digital_in | GB | single_source |
| OEM-1-P | Power steering pressure switch | digital_in | G5VOODOONEO4-B-B21 | Digital Input 4 | digital_in | LY | single_source |
| OEM-1-Q | A/C request | digital_in | G5VOODOONEO4-B-B20 | Digital Input 5 / K-Line | digital_in | LgB | single_source |
| OEM-1-R | Cooling fan relay | low_side_out | G5VOODOONEO4-A-A20 | Aux 2 | low_side_out | YB | single_source |
| OEM-1-S | Heater control unit | — | — | — | — | LOr | single_source |
| OEM-1-T | Unknown | — | — | — | — | YR | single_source |
| OEM-1-U | Unknown | — | — | — | — | RB | single_source |
| OEM-1-V | Neutral/clutch switch | digital_in | G5VOODOONEO4-B-B19 | Digital Input 6 | digital_in | BrW | single_source |
| OEM-2-A | Power ground | ground | G5VOODOONEO4-A-A25 + G5VOODOONEO4-A-A34 + G5VOODOONEO4-B-B25 + G5VOODOONEO4-B-B34 + MAIN-R-COIL- | Ground + Ground + Ground + Ground + Relay coil negative (ECU low-side driver) | ground + load | B | single_source |
| OEM-2-B | Power ground | ground | G5VOODOONEO4-A-A25 + G5VOODOONEO4-A-A34 + G5VOODOONEO4-B-B25 + G5VOODOONEO4-B-B34 + MAIN-R-COIL- | Ground + Ground + Ground + Ground + Relay coil negative (ECU low-side driver) | ground + load | B | single_source |
| OEM-2-C | Sensor ground (E2) | sensor_ground | G5VOODOONEO4-A-A24 + G5VOODOONEO4-B-B22 | Sensor Ground + Sensor Ground | sensor_ground | BLg | corroborated |
| OEM-2-D | Sensor ground (E2) | sensor_ground | G5VOODOONEO4-A-A24 + G5VOODOONEO4-B-B22 | Sensor Ground + Sensor Ground | sensor_ground | BL | corroborated |
| OEM-2-E | Crank position (CAS NE) | trigger_in | G5VOODOONEO4-A-A8 | Trigger 1 | trigger_in | W | single_source |
| OEM-2-F | MAF ground | sensor_ground | G5VOODOONEO4-A-A24 + G5VOODOONEO4-B-B22 | Sensor Ground + Sensor Ground | sensor_ground | BR | single_source |
| OEM-2-G | Cam position (CAS G) | trigger_in | G5VOODOONEO4-A-A9 | Trigger 2 | trigger_in | YL | single_source |
| OEM-2-H | Data link connector | serial | — | — | — | LgY | single_source |
| OEM-2-I | Tachometer output | tacho_out | — | — | — | BW | single_source |
| OEM-2-J | EGR function sensor | — | — | — | — | LgR | single_source |
| OEM-2-K | +5V sensor supply | vref | G5VOODOONEO4-A-A32 | +5V Out | vref | LgW | single_source |
| OEM-2-L | Rear defroster relay | low_side_out | G5VOODOONEO4-A-A27 | Aux 10 / Digital Input 10 | low_side_out | LR | single_source |
| OEM-2-M | Throttle position (TPS) | analog_in | G5VOODOONEO4-A-A17 | Analogue Volt 1 | analog_in | RB | single_source |
| OEM-2-N | O2 sensor | lambda_nb_in | G5VOODOONEO4-A-A22 | Analogue Volt 2 | analog_in | RL | single_source |
| OEM-2-O | Mass air flow (MAF) | analog_in | G5VOODOONEO4-A-A14 | ADIO 1 | analog_in | R | single_source |
| OEM-2-P | Intake air temperature (IAT) | temp_in | G5VOODOONEO4-A-A16 | Analogue Temp 2 | temp_in | RB | single_source |
| OEM-2-Q | Coolant temperature (ECT) | temp_in | G5VOODOONEO4-A-A15 | Analogue Temp 1 | temp_in | LW | single_source |
| OEM-2-R | PRC solenoid (fuel pressure regulator) | low_side_out | G5VOODOONEO4-B-B10 | Heat | low_side_out | YG | single_source |
| OEM-2-S | Condenser fan relay | low_side_out | G5VOODOONEO4-A-A19 | Aux 7 / Digital Input 7 | low_side_out | LW | single_source |
| OEM-2-T | Fuel pump relay | low_side_out | G5VOODOONEO4-A-A29 | Aux 8 / Digital Input 8 | low_side_out | Lg | single_source |
| OEM-2-U | Injector 1 | injector_out | G5VOODOONEO4-A-A4 | Injection 1 | injector_out | Y | single_source |
| OEM-2-V | Injector 2 | injector_out | G5VOODOONEO4-A-A3 | Injection 2 | injector_out | YB | single_source |
| OEM-2-W | ISC solenoid | low_side_out | G5VOODOONEO4-B-B30 | Aux 11 | low_side_out | LOr | single_source |
| OEM-2-X | Evap purge solenoid | low_side_out | G5VOODOONEO4-B-B4 | Injection 5 | injector_out | YR | single_source |
| OEM-2-Y | Injector 3 | injector_out | G5VOODOONEO4-A-A2 | Injection 3 | injector_out | GW | single_source |
| OEM-2-Z | Injector 4 | injector_out | G5VOODOONEO4-A-A1 | Injection 4 | injector_out | G | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-1-B | SP-14V-1 | 0.85 | no route | ECU power +14V (main relay) | — | |
| W2 | SP-14V-1 | G5VOODOONEO4-B-B5 | 0.85 | no route | +14V E-Throttle | — | |
| W3 | NEW-KEYON-1 | MAIN-R-COIL+ | 0.5 | no route | Relay coil positive (ignition-switched +12V) | — | |
| W4 | NEW-BATT-1 | MAIN-R-IN | 0.85 | no route | Relay contact input (battery + via main fuse) | — | |
| W5 | MAIN-R-COIL- | SP-GND-1 | 0.5 | no route | Relay coil negative (ECU low-side driver) | — | |
| W6 | MAIN-R-OUT | G5VOODOONEO4-A-A5 | 0.85 | no route | Relay contact output (switched +12V bus) | — | |
| W7 | OEM-2-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W8 | OEM-2-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W9 | SP-GND-1 | G5VOODOONEO4-A-A25 | 0.85 | no route | Ground | — | |
| W10 | SP-GND-1 | G5VOODOONEO4-A-A34 | 0.85 | no route | Ground | — | |
| W11 | SP-GND-1 | G5VOODOONEO4-B-B25 | 0.85 | no route | Ground | — | |
| W12 | SP-GND-1 | G5VOODOONEO4-B-B34 | 0.85 | no route | Ground | — | |
| W13 | OEM-2-C | SP-0V-1 | 0.5 | no route | Sensor ground (E2) | — | |
| W14 | OEM-2-D | SP-0V-1 | 0.5 | no route | Sensor ground (E2) | — | |
| W15 | OEM-2-F | SP-0V-1 | 0.5 | no route | MAF ground | — | |
| W16 | SP-0V-1 | G5VOODOONEO4-A-A24 | 0.5 | no route | Sensor Ground | — | |
| W17 | SP-0V-1 | G5VOODOONEO4-B-B22 | 0.5 | no route | Sensor Ground | — | |
| W18 | OEM-2-K | G5VOODOONEO4-A-A32 | 0.5 | no route | +5V sensor supply | — | |
| W19 | OEM-2-E | G5VOODOONEO4-A-A8 | 0.5 | no route | Crank position (CAS NE) | — | |
| W20 | OEM-2-G | G5VOODOONEO4-A-A9 | 0.5 | no route | Cam position (CAS G) | — | |
| W21 | OEM-1-G | G5VOODOONEO4-A-A13 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W22 | OEM-1-H | G5VOODOONEO4-A-A12 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W23 | OEM-2-U | G5VOODOONEO4-A-A4 | 0.5 | no route | Injector 1 | — | |
| W24 | OEM-2-V | G5VOODOONEO4-A-A3 | 0.5 | no route | Injector 2 | — | |
| W25 | OEM-2-Y | G5VOODOONEO4-A-A2 | 0.5 | no route | Injector 3 | — | |
| W26 | OEM-2-Z | G5VOODOONEO4-A-A1 | 0.5 | no route | Injector 4 | — | |
| W27 | OEM-2-O | G5VOODOONEO4-A-A14 | 0.5 | no route | Mass air flow (MAF) | — | |
| W28 | OEM-2-M | G5VOODOONEO4-A-A17 | 0.5 | no route | Throttle position (TPS) | — | |
| W29 | OEM-2-Q | G5VOODOONEO4-A-A15 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W30 | OEM-1-J | G5VOODOONEO4-A-A21 | 0.5 | no route | A/C relay | — | |
| W31 | OEM-1-R | G5VOODOONEO4-A-A20 | 0.5 | no route | Cooling fan relay | — | |
| W32 | OEM-2-S | G5VOODOONEO4-A-A19 | 0.5 | no route | Condenser fan relay | — | |
| W33 | OEM-2-T | G5VOODOONEO4-A-A29 | 0.5 | no route | Fuel pump relay | — | |
| W34 | OEM-1-L | G5VOODOONEO4-A-A28 | 0.5 | no route | Coolant fan relay | — | |
| W35 | OEM-2-L | G5VOODOONEO4-A-A27 | 0.5 | no route | Rear defroster relay | — | |
| W36 | OEM-2-W | G5VOODOONEO4-B-B30 | 0.5 | no route | ISC solenoid | — | |
| W37 | OEM-1-E | G5VOODOONEO4-B-B29 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W38 | OEM-2-R | G5VOODOONEO4-B-B10 | 0.5 | no route | PRC solenoid (fuel pressure regulator) | — | |
| W39 | OEM-2-X | G5VOODOONEO4-B-B4 | 0.5 | no route | Evap purge solenoid | — | |
| W40 | OEM-2-N | G5VOODOONEO4-A-A22 | 0.5 | no route | O2 sensor | — | |
| W41 | OEM-2-P | G5VOODOONEO4-A-A16 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W42 | OEM-1-M | G5VOODOONEO4-A-A30 | 0.5 | no route | Vehicle speed | — | |
| W43 | OEM-1-C | G5VOODOONEO4-A-A31 | 0.5 | no route | Starter input (12V while cranking) | — | |
| W44 | OEM-1-O | G5VOODOONEO4-A-A23 | 0.5 | no route | Stop light switch | — | |
| W45 | OEM-1-P | G5VOODOONEO4-B-B21 | 0.5 | no route | Power steering pressure switch | — | |
| W46 | OEM-1-Q | G5VOODOONEO4-B-B20 | 0.5 | no route | A/C request | — | |
| W47 | OEM-1-V | G5VOODOONEO4-B-B19 | 0.5 | no route | Neutral/clutch switch | — | |
| W48 | NEW-KEYON-1 | G5VOODOONEO4-A-A6 | 0.5 | no route | Ignition Switch | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 174515-6 | TE | AMP Multilock .040/.070 hybrid 22-pin female harness plug (Miata NA/NB ECU) | 1.000 | ea |
| connector | 174516-6 | TE | AMP Multilock .040/.070 hybrid 26-pin female harness plug (Miata NA/NB ECU) | 1.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (8)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | LOAD_UNKNOWN | G5VOODOONEO4-A-A19 | G5VOODOONEO4-A-A19 "Aux 7 / Digital Input 7" drives OEM-2-S Condenser fan relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | G5VOODOONEO4-A-A20 | G5VOODOONEO4-A-A20 "Aux 2" drives OEM-1-R Cooling fan relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | G5VOODOONEO4-A-A21 | G5VOODOONEO4-A-A21 "Aux 1" drives OEM-1-J A/C relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | G5VOODOONEO4-A-A29 | G5VOODOONEO4-A-A29 "Aux 8 / Digital Input 8" drives OEM-2-T Fuel pump relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | G5VOODOONEO4-B-B30 | G5VOODOONEO4-B-B30 "Aux 11" drives OEM-2-W ISC solenoid (load 1.0 A) but its current rating is unknown. Check the ECU manual. |
| info | NET_FAMILY | G5VOODOONEO4-A-A6 ↔ MAIN-R-COIL+ | G5VOODOONEO4-A-A6 "Ignition Switch" [digital_in] is wired to MAIN-R-COIL+ "Relay coil positive (ignition-switched +12V)" [power_in]. Switched supply used as the ignition-on sense. |
| info | NET_FAMILY | OEM-2-X ↔ G5VOODOONEO4-B-B4 | OEM-2-X "Evap purge solenoid" [low_side_out] is wired to G5VOODOONEO4-B-B4 "Injection 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | UNMAPPED | OEM | 9 optional OEM pins are not mapped: OEM-1-D Data link connector; OEM-1-I Powertrain control module (transmission); OEM-1-N Powertrain control module (transmission); OEM-1-S Heater control unit; OEM-1-T Unknown; OEM-1-U Unknown; OEM-2-H Data link connector; OEM-2-I Tachometer output; OEM-2-J EGR function sensor |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-1-A | Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed. | mapping-proposal |
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-19. Review every wire against both manuals before building. Not wired: - OEM-1 A: Constant +12V: Link G5 Voodoo Neo 4 has no battery-constant memory input; not needed - OEM-2 I: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on Link G5 Voodoo Neo 4 - OEM-1 D: Data link connector: no free k_line on Link G5 Voodoo Neo 4 - OEM-2 H: Data link connector: no free k_line on Link G5 Voodoo Neo 4 - OEM-1 I: Powertrain control module (transmission): not classified in the library; wire by hand - OEM-1 N: Powertrain control module (transmission): not classified in the library; wire by hand - OEM-1 S: Heater control unit: not classified in the library; wire by hand - OEM-1 T: Unknown: not classified in the library; wire by hand - OEM-1 U: Unknown: not classified in the library; wire by hand - OEM-2 J: EGR function sensor: not classified in the library; wire by hand
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | Emtron SL4/SL6/SL8 pinout pages | https://docs.emtronaustralia.com.au/engine-management/wiring/index.html | archive | 2026-10-05 | e52b3da9996a |
| 4 | vendor_doc | Link G4X MX5X install manual (NA 1.6/1.8) | https://linkecu.com/documentation/MX5X.pdf | archive | 2026-10-05 | b7f730de9f6e |
| 4 | vendor_doc | Link G5 Voodoo Neo 4 Installer I/O Table | https://kb.linkecu.com/__attachments/a_1a3242fc2d568967ebf4193c319d8d7c0455f02d79a5d02336f74d7d307e93ce/G5%20Neo4%20Installer%20IO%20Table.pdf | — | — | — |
| 3 | forum | rusEFI Mazda Miata 2002 engine wiring | https://github.com/rusefi/rusefi/wiki/Mazda-Miata-2002 | archive | 2026-10-05 | cc3cae670408 |
| 2 | expert_report | Justin Barrera — Miata NA/NB wiring corrections | — | — | — | — |
| 2 | community_copy | rusefi wiki: 1994 Mazda Miata 1.8 (NA8) ECU pinout | https://github.com/rusefi/rusefi/wiki/Mazda-Miata-1994 | — | 2026-10-08 | 075801b907f4 |