MX-5 Miata NB1 1999-00 (BP-4W) → Emtron Shadow 8 (auto)
MX-5 Miata NB1 1999-00 (BP-4W) — Emtron — Shadow 8
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-08
Before you start
| Status | draft · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | 1: read the Findings page before cutting any wire |
| Size of the job | 54 wires · 8 connectors · 6 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Terminals | 3-1447221-4 |
| Order of work | 1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up. |
Build checklist
Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.
| Wire | From | To | Gauge | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-1-B | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-3-M | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | SHADOW8-A-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | SHADOW8-B-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-1-A | SHADOW8-B-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-3-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-3-B | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-3-C | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | SHADOW8-A-34 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | SHADOW8-A-9 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-3-F | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-0V-1 | SHADOW8-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | SHADOW8-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-2-I | SHADOW8-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-2-J | SHADOW8-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-2-H | SHADOW8-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-2-F | SHADOW8-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-3-G | SHADOW8-B-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-3-H | SHADOW8-B-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-3-W | SHADOW8-B-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-3-X | SHADOW8-B-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-3-Y | SHADOW8-B-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-3-Z | SHADOW8-B-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-1-I | SHADOW8-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-1-R | SHADOW8-B-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-1-S | SHADOW8-B-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-3-N | SHADOW8-B-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-1-U | SHADOW8-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-3-V | SHADOW8-B-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-3-O | SHADOW8-B-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-1-E | SHADOW8-B-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-1-O | SHADOW8-B-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-1-Q | SHADOW8-B-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-2-M | SHADOW8-B-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-2-N | SHADOW8-B-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-2-O | SHADOW8-B-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-2-P | SHADOW8-B-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-3-L | SHADOW8-B-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-3-Q | SHADOW8-B-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-2-L | SHADOW8-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-3-E | SHADOW8-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-2-C | SHADOW8-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-3-J | SHADOW8-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-2-E | SHADOW8-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-2-B | SHADOW8-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-2-A | SHADOW8-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-3-K | SHADOW8-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-3-S | SHADOW8-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-2-D | SHADOW8-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-1-F | SHADOW8-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-1-G | SHADOW8-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-1-P | SHADOW8-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-1-V | SHADOW8-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-3-I | SHADOW8-A-31 | 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 | SHADOW8-A-1 | SHADOW8-A-34 | open (OL) | +12 V supply must not touch power ground | |
| 2 | SHADOW8-A-1 | SHADOW8-A-4 | open (OL) | +12 V supply must not touch sensor ground | |
| 3 | SHADOW8-A-3 | SHADOW8-A-34 | open (OL) | 5 V sensor reference must not touch power ground | |
| 4 | SHADOW8-A-3 | SHADOW8-A-4 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 5 | SHADOW8-B-1 | SHADOW8-A-34 | open (OL) | +12 V supply must not touch power ground | |
| 6 | SHADOW8-B-1 | SHADOW8-A-4 | open (OL) | +12 V supply must not touch sensor ground | |
| 7 | SHADOW8-A-1 | SHADOW8-A-3 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 8 | SHADOW8-B-1 | SHADOW8-A-3 | open (OL) | +12 V supply must not touch 5 V sensor reference |
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Constant +12V | — | W5 | — | 0.85 | SHADOW8-B-1 | — | — | — |
| B | ECU power +14V (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| E | Malfunction indicator lamp (MIL) | — | W31 | — | 0.5 | SHADOW8-B-17 | — | — | — |
| F | Brake switch | — | W50 | — | 0.5 | SHADOW8-A-27 | — | — | — |
| G | Power steering pressure switch | — | W51 | — | 0.5 | SHADOW8-A-28 | — | — | — |
| I | Condenser fan relay | — | W24 | — | 0.5 | SHADOW8-B-10 | — | — | — |
| O | Alternator control | — | W32 | — | 0.5 | SHADOW8-B-6 | — | — | — |
| P | A/C request | — | W52 | — | 0.5 | SHADOW8-A-29 | — | — | — |
| Q | Charge lamp | — | W33 | — | 0.5 | SHADOW8-B-7 | — | — | — |
| R | Cooling fan relay | — | W25 | — | 0.5 | SHADOW8-B-11 | — | — | — |
| S | A/C clutch relay | — | W26 | — | 0.5 | SHADOW8-B-12 | — | — | — |
| U | Front O2 heater | — | W28 | — | 0.5 | SHADOW8-B-14 | — | — | — |
| V | Neutral switch | — | W53 | — | 0.5 | SHADOW8-A-30 | — | — | — |
OEM-2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Fuel tank pressure | — | W46 | — | 0.5 | SHADOW8-A-19 | — | — | — |
| B | Intake air temperature (IAT) | — | W45 | — | 0.5 | SHADOW8-A-18 | — | — | — |
| C | Front O2 signal | — | W42 | — | 0.5 | SHADOW8-A-12 | — | — | — |
| D | Vehicle speed | — | W49 | — | 0.5 | SHADOW8-A-26 | — | — | — |
| E | Coolant temperature (ECT) | — | W44 | — | 0.5 | SHADOW8-A-14 | — | — | — |
| F | Knock sensor | — | W17 | — | 0.5 | SHADOW8-A-16 | — | — | — |
| H | Cam position (CMP) | — | W16 | — | 0.5 | SHADOW8-A-6 | — | — | — |
| I | +5V sensor supply | — | W14 | — | 0.5 | SHADOW8-A-3 | — | — | — |
| J | Crank position (CKP) | — | W15 | — | 0.5 | SHADOW8-A-5 | — | — | — |
| K | Tachometer output | — | — | — | — | — | — | — | — |
| L | Mass air flow (MAF) | — | W40 | — | 0.5 | SHADOW8-A-10 | — | — | — |
| M | EGR valve | — | W34 | — | 0.5 | SHADOW8-B-8 | — | — | — |
| N | EGR valve | — | W35 | — | 0.5 | SHADOW8-B-9 | — | — | — |
| O | EGR valve | — | W36 | — | 0.5 | SHADOW8-B-22 | — | — | — |
| P | EGR valve | — | W37 | — | 0.5 | SHADOW8-B-23 | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Power ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| B | Power ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| C | Power ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| E | Throttle position (TPS) | — | W41 | — | 0.5 | SHADOW8-A-11 | — | — | — |
| F | Signal ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| G | Ignition 1 (coils 1+4, wasted spark) | — | W18 | — | 0.5 | SHADOW8-B-27 | — | — | — |
| H | Ignition 2 (coils 2+3, wasted spark) | — | W19 | — | 0.5 | SHADOW8-B-28 | — | — | — |
| I | Clutch switch | — | W54 | — | 0.5 | SHADOW8-A-31 | — | — | — |
| J | Rear O2 signal | — | W43 | — | 0.5 | SHADOW8-A-13 | — | — | — |
| K | Fuel level | — | W47 | — | 0.5 | SHADOW8-A-20 | — | — | — |
| L | Evap purge solenoid | — | W38 | — | 0.5 | SHADOW8-B-24 | — | — | — |
| M | ISC valve +14V feed | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| N | Fuel pump relay | — | W27 | — | 0.5 | SHADOW8-B-13 | — | — | — |
| O | ISC valve low side | — | W30 | — | 0.5 | SHADOW8-B-16 | — | — | — |
| Q | VICS solenoid (intake butterflies) | — | W39 | — | 0.5 | SHADOW8-B-25 | — | — | — |
| S | EGR boost sensor | — | W48 | — | 0.5 | SHADOW8-A-21 | — | — | — |
| T | EGR boost solenoid | — | — | — | — | — | — | — | — |
| U | Canister drain cut valve (CDCV) | — | — | — | — | — | — | — | — |
| V | Rear O2 heater | — | W29 | — | 0.5 | SHADOW8-B-15 | — | — | — |
| W | Injector 1 | — | W20 | — | 0.5 | SHADOW8-B-2 | — | — | — |
| X | Injector 2 | — | W21 | — | 0.5 | SHADOW8-B-3 | — | — | — |
| Y | Injector 3 | — | W22 | — | 0.5 | SHADOW8-B-4 | — | — | — |
| Z | Injector 4 | — | W23 | — | 0.5 | SHADOW8-B-5 | — | — | — |
SHADOW8-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU supply | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | 8.0V sensor supply | — | — | — | — | — | — | — | — |
| 3 | 5.0V sensor supply | — | W14 | — | 0.5 | OEM-2-I | — | — | — |
| 4 | 0V analog reference | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | Crank position sensor | — | W15 | — | 0.5 | OEM-2-J | — | — | — |
| 6 | Sync position sensor | — | W16 | — | 0.5 | OEM-2-H | — | — | — |
| 7 | Trigger ground | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Shield | — | — | — | — | — | — | — | — |
| 9 | Ground 1 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 10 | Analog voltage 1 | — | W40 | — | 0.5 | OEM-2-L | — | — | — |
| 11 | Analog voltage 2 | — | W41 | — | 0.5 | OEM-3-E | — | — | — |
| 12 | Analog voltage 3 | — | W42 | — | 0.5 | OEM-2-C | — | — | — |
| 13 | Analog voltage 4 | — | W43 | — | 0.5 | OEM-3-J | — | — | — |
| 14 | Analog voltage 5 | — | W44 | — | 0.5 | OEM-2-E | — | — | — |
| 15 | CAN bus 1 high | — | — | — | — | — | — | — | — |
| 16 | Knock 1 + | — | W17 | — | 0.5 | OEM-2-F | — | — | — |
| 17 | Knock 1 − | — | — | — | — | — | — | — | — |
| 18 | Analog voltage 6 | — | W45 | — | 0.5 | OEM-2-B | — | — | — |
| 19 | Analog voltage 7 (switchable 1k pull-up) | — | W46 | — | 0.5 | OEM-2-A | — | — | — |
| 20 | Analog voltage 8 (switchable 1k pull-up) | — | W47 | — | 0.5 | OEM-3-K | — | — | — |
| 21 | Analog voltage 9 (switchable 1k pull-up) | — | W48 | — | 0.5 | OEM-3-S | — | — | — |
| 22 | Analog voltage 10 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 23 | CAN bus 1 low | — | — | — | — | — | — | — | — |
| 24 | Knock 2 + | — | — | — | — | — | — | — | — |
| 25 | Knock 2 − | — | — | — | — | — | — | — | — |
| 26 | Digital input 1 | — | W49 | — | 0.5 | OEM-2-D | — | — | — |
| 27 | Digital input 2 | — | W50 | — | 0.5 | OEM-1-F | — | — | — |
| 28 | Digital input 3 | — | W51 | — | 0.5 | OEM-1-G | — | — | — |
| 29 | Digital input 4 | — | W52 | — | 0.5 | OEM-1-P | — | — | — |
| 30 | Digital input 5 | — | W53 | — | 0.5 | OEM-1-V | — | — | — |
| 31 | Digital input 6 | — | W54 | — | 0.5 | OEM-3-I | — | — | — |
| 32 | CAN bus 2 high | — | — | — | — | — | — | — | — |
| 33 | CAN bus 2 low | — | — | — | — | — | — | — | — |
| 34 | Ground 2 | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
SHADOW8-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Battery constant (HOT) supply | — | W5 | — | 0.85 | OEM-1-A | — | — | — |
| 2 | Injector cylinder 1 | — | W20 | — | 0.5 | OEM-3-W | — | — | — |
| 3 | Injector cylinder 2 | — | W21 | — | 0.5 | OEM-3-X | — | — | — |
| 4 | Injector cylinder 3 | — | W22 | — | 0.5 | OEM-3-Y | — | — | — |
| 5 | Injector cylinder 4 | — | W23 | — | 0.5 | OEM-3-Z | — | — | — |
| 6 | Injector cylinder 5 | — | W32 | — | 0.5 | OEM-1-O | — | — | — |
| 7 | Injector cylinder 6 | — | W33 | — | 0.5 | OEM-1-Q | — | — | — |
| 8 | Injector cylinder 7 | — | W34 | — | 0.5 | OEM-2-M | — | — | — |
| 9 | Injector cylinder 8 | — | W35 | — | 0.5 | OEM-2-N | — | — | — |
| 10 | Aux output 1 | — | W24 | — | 0.5 | OEM-1-I | — | — | — |
| 11 | Aux output 2 | — | W25 | — | 0.5 | OEM-1-R | — | — | — |
| 12 | Aux output 3 | — | W26 | — | 0.5 | OEM-1-S | — | — | — |
| 13 | Aux output 4 | — | W27 | — | 0.5 | OEM-3-N | — | — | — |
| 14 | Aux output 5 | — | W28 | — | 0.5 | OEM-1-U | — | — | — |
| 15 | Aux output 6 | — | W29 | — | 0.5 | OEM-3-V | — | — | — |
| 16 | Aux output 7 | — | W30 | — | 0.5 | OEM-3-O | — | — | — |
| 17 | Aux output 8 | — | W31 | — | 0.5 | OEM-1-E | — | — | — |
| 18 | Digital input 7 | — | — | — | — | — | — | — | — |
| 19 | Digital input 8 | — | — | — | — | — | — | — | — |
| 20 | Digital input 9 | — | — | — | — | — | — | — | — |
| 21 | Digital input 10 / ignition switch | — | — | — | — | — | — | — | — |
| 22 | Aux output 9 | — | W36 | — | 0.5 | OEM-2-O | — | — | — |
| 23 | Aux output 10 | — | W37 | — | 0.5 | OEM-2-P | — | — | — |
| 24 | Aux output 11 | — | W38 | — | 0.5 | OEM-3-L | — | — | — |
| 25 | Aux output 12 | — | W39 | — | 0.5 | OEM-3-Q | — | — | — |
| 26 | Aux 9–12 power supply | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 27 | Ignition TTL cylinder 1 | — | W18 | — | 0.5 | OEM-3-G | — | — | — |
| 28 | Ignition TTL cylinder 2 | — | W19 | — | 0.5 | OEM-3-H | — | — | — |
| 29 | Ignition TTL cylinder 3 | — | — | — | — | — | — | — | — |
| 30 | Ignition TTL cylinder 4 | — | — | — | — | — | — | — | — |
| 31 | Ignition TTL cylinder 5 | — | — | — | — | — | — | — | — |
| 32 | Ignition TTL cylinder 6 | — | — | — | — | — | — | — | — |
| 33 | Ignition TTL cylinder 7 | — | — | — | — | — | — | — | — |
| 34 | Ignition TTL cylinder 8 | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W13 | — | 0.5 | SHADOW8-A-7 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-3-F | — | — | — |
| 1 | — | — | W12 | — | 0.5 | SHADOW8-A-4 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-1-B | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-3-M | — | — | — |
| 1 | — | — | W3 | — | 0.85 | SHADOW8-A-1 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | SHADOW8-B-26 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W6 | — | 0.85 | OEM-3-A | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-3-B | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-3-C | — | — | — |
| 1 | — | — | W9 | — | 0.85 | SHADOW8-A-34 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | SHADOW8-A-9 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-1-A | Constant +12V | power_in | SHADOW8-B-1 | Battery constant (HOT) supply | power_in | single_source | |
| OEM-1-B | ECU power +14V (main relay) | power_in | SHADOW8-A-1 + SHADOW8-B-26 | ECU supply + Aux 9–12 power supply | power_in | single_source | |
| OEM-1-E | Malfunction indicator lamp (MIL) | low_side_out | SHADOW8-B-17 | Aux output 8 | switch_out | single_source | |
| OEM-1-F | Brake switch | digital_in | SHADOW8-A-27 | Digital input 2 | digital_in | single_source | |
| OEM-1-G | Power steering pressure switch | digital_in | SHADOW8-A-28 | Digital input 3 | digital_in | single_source | |
| OEM-1-I | Condenser fan relay | low_side_out | SHADOW8-B-10 | Aux output 1 | low_side_out | single_source | |
| OEM-1-O | Alternator control | low_side_out | SHADOW8-B-6 | Injector cylinder 5 | injector_out | single_source | |
| OEM-1-P | A/C request | digital_in | SHADOW8-A-29 | Digital input 4 | digital_in | single_source | |
| OEM-1-Q | Charge lamp | low_side_out | SHADOW8-B-7 | Injector cylinder 6 | injector_out | single_source | |
| OEM-1-R | Cooling fan relay | low_side_out | SHADOW8-B-11 | Aux output 2 | low_side_out | single_source | |
| OEM-1-S | A/C clutch relay | low_side_out | SHADOW8-B-12 | Aux output 3 | low_side_out | single_source | |
| OEM-1-U | Front O2 heater | low_side_out | SHADOW8-B-14 | Aux output 5 | switch_out | single_source | |
| OEM-1-V | Neutral switch | digital_in | SHADOW8-A-30 | Digital input 5 | digital_in | single_source | |
| OEM-2-A | Fuel tank pressure | analog_in | SHADOW8-A-19 | Analog voltage 7 (switchable 1k pull-up) | analog_in | single_source | |
| OEM-2-B | Intake air temperature (IAT) | temp_in | SHADOW8-A-18 | Analog voltage 6 | analog_in | single_source | |
| OEM-2-C | Front O2 signal | lambda_nb_in | SHADOW8-A-12 | Analog voltage 3 | analog_in | single_source | |
| OEM-2-D | Vehicle speed | digital_in | SHADOW8-A-26 | Digital input 1 | digital_in | single_source | |
| OEM-2-E | Coolant temperature (ECT) | temp_in | SHADOW8-A-14 | Analog voltage 5 | analog_in | single_source | |
| OEM-2-F | Knock sensor | knock_in | SHADOW8-A-16 | Knock 1 + | knock_in | single_source | |
| OEM-2-H | Cam position (CMP) | trigger_in | SHADOW8-A-6 | Sync position sensor | trigger_in | single_source | |
| OEM-2-I | +5V sensor supply | vref | SHADOW8-A-3 | 5.0V sensor supply | vref | single_source | |
| OEM-2-J | Crank position (CKP) | trigger_in | SHADOW8-A-5 | Crank position sensor | trigger_in | single_source | |
| OEM-2-K | Tachometer output | tacho_out | — | — | — | single_source | |
| OEM-2-L | Mass air flow (MAF) | analog_in | SHADOW8-A-10 | Analog voltage 1 | analog_in | single_source | |
| OEM-2-M | EGR valve | low_side_out | SHADOW8-B-8 | Injector cylinder 7 | injector_out | single_source | |
| OEM-2-N | EGR valve | low_side_out | SHADOW8-B-9 | Injector cylinder 8 | injector_out | single_source | |
| OEM-2-O | EGR valve | low_side_out | SHADOW8-B-22 | Aux output 9 | hbridge_out | single_source | |
| OEM-2-P | EGR valve | low_side_out | SHADOW8-B-23 | Aux output 10 | hbridge_out | single_source | |
| OEM-3-A | Power ground | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | single_source | |
| OEM-3-B | Power ground | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | single_source | |
| OEM-3-C | Power ground | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | single_source | |
| OEM-3-E | Throttle position (TPS) | analog_in | SHADOW8-A-11 | Analog voltage 2 | analog_in | single_source | |
| OEM-3-F | Signal ground | sensor_ground | SHADOW8-A-4 + SHADOW8-A-7 | 0V analog reference + Trigger ground | sensor_ground | single_source | |
| OEM-3-G | Ignition 1 (coils 1+4, wasted spark) | ignition_out | SHADOW8-B-27 | Ignition TTL cylinder 1 | ignition_out | single_source | |
| OEM-3-H | Ignition 2 (coils 2+3, wasted spark) | ignition_out | SHADOW8-B-28 | Ignition TTL cylinder 2 | ignition_out | single_source | |
| OEM-3-I | Clutch switch | digital_in | SHADOW8-A-31 | Digital input 6 | digital_in | single_source | |
| OEM-3-J | Rear O2 signal | lambda_nb_in | SHADOW8-A-13 | Analog voltage 4 | analog_in | single_source | |
| OEM-3-K | Fuel level | analog_in | SHADOW8-A-20 | Analog voltage 8 (switchable 1k pull-up) | analog_in | single_source | |
| OEM-3-L | Evap purge solenoid | low_side_out | SHADOW8-B-24 | Aux output 11 | hbridge_out | single_source | |
| OEM-3-M | ISC valve +14V feed | power_in | SHADOW8-A-1 + SHADOW8-B-26 | ECU supply + Aux 9–12 power supply | power_in | single_source | |
| OEM-3-N | Fuel pump relay | low_side_out | SHADOW8-B-13 | Aux output 4 | low_side_out | single_source | |
| OEM-3-O | ISC valve low side | low_side_out | SHADOW8-B-16 | Aux output 7 | switch_out | single_source | |
| OEM-3-Q | VICS solenoid (intake butterflies) | low_side_out | SHADOW8-B-25 | Aux output 12 | hbridge_out | single_source | |
| OEM-3-S | EGR boost sensor | analog_in | SHADOW8-A-21 | Analog voltage 9 (switchable 1k pull-up) | analog_in | single_source | |
| OEM-3-T | EGR boost solenoid | low_side_out | — | — | — | single_source | |
| OEM-3-U | Canister drain cut valve (CDCV) | low_side_out | — | — | — | single_source | |
| OEM-3-V | Rear O2 heater | low_side_out | SHADOW8-B-15 | Aux output 6 | switch_out | single_source | |
| OEM-3-W | Injector 1 | injector_out | SHADOW8-B-2 | Injector cylinder 1 | injector_out | single_source | |
| OEM-3-X | Injector 2 | injector_out | SHADOW8-B-3 | Injector cylinder 2 | injector_out | single_source | |
| OEM-3-Y | Injector 3 | injector_out | SHADOW8-B-4 | Injector cylinder 3 | injector_out | single_source | |
| OEM-3-Z | Injector 4 | injector_out | SHADOW8-B-5 | Injector cylinder 4 | injector_out | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-1-B | SP-14V-1 | 0.85 | no route | ECU power +14V (main relay) | — | |
| W2 | OEM-3-M | SP-14V-1 | 0.85 | no route | ISC valve +14V feed | — | |
| W3 | SP-14V-1 | SHADOW8-A-1 | 0.85 | no route | ECU supply | — | |
| W4 | SP-14V-1 | SHADOW8-B-26 | 0.85 | no route | Aux 9–12 power supply | — | |
| W5 | OEM-1-A | SHADOW8-B-1 | 0.85 | no route | Constant +12V | — | |
| W6 | OEM-3-A | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W7 | OEM-3-B | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W8 | OEM-3-C | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W9 | SP-GND-1 | SHADOW8-A-34 | 0.85 | no route | Ground 2 | — | |
| W10 | SP-GND-1 | SHADOW8-A-9 | 0.85 | no route | Ground 1 | — | |
| W11 | OEM-3-F | SP-0V-1 | 0.5 | no route | Signal ground | — | |
| W12 | SP-0V-1 | SHADOW8-A-4 | 0.5 | no route | 0V analog reference | — | |
| W13 | SP-0V-1 | SHADOW8-A-7 | 0.5 | no route | Trigger ground | — | |
| W14 | OEM-2-I | SHADOW8-A-3 | 0.5 | no route | +5V sensor supply | — | |
| W15 | OEM-2-J | SHADOW8-A-5 | 0.5 | no route | Crank position (CKP) | — | |
| W16 | OEM-2-H | SHADOW8-A-6 | 0.5 | no route | Cam position (CMP) | — | |
| W17 | OEM-2-F | SHADOW8-A-16 | 0.5 | no route | Knock sensor | — | |
| W18 | OEM-3-G | SHADOW8-B-27 | 0.5 | no route | Ignition 1 (coils 1+4, wasted spark) | — | |
| W19 | OEM-3-H | SHADOW8-B-28 | 0.5 | no route | Ignition 2 (coils 2+3, wasted spark) | — | |
| W20 | OEM-3-W | SHADOW8-B-2 | 0.5 | no route | Injector 1 | — | |
| W21 | OEM-3-X | SHADOW8-B-3 | 0.5 | no route | Injector 2 | — | |
| W22 | OEM-3-Y | SHADOW8-B-4 | 0.5 | no route | Injector 3 | — | |
| W23 | OEM-3-Z | SHADOW8-B-5 | 0.5 | no route | Injector 4 | — | |
| W24 | OEM-1-I | SHADOW8-B-10 | 0.5 | no route | Condenser fan relay | — | |
| W25 | OEM-1-R | SHADOW8-B-11 | 0.5 | no route | Cooling fan relay | — | |
| W26 | OEM-1-S | SHADOW8-B-12 | 0.5 | no route | A/C clutch relay | — | |
| W27 | OEM-3-N | SHADOW8-B-13 | 0.5 | no route | Fuel pump relay | — | |
| W28 | OEM-1-U | SHADOW8-B-14 | 0.5 | no route | Front O2 heater | — | |
| W29 | OEM-3-V | SHADOW8-B-15 | 0.5 | no route | Rear O2 heater | — | |
| W30 | OEM-3-O | SHADOW8-B-16 | 0.5 | no route | ISC valve low side | — | |
| W31 | OEM-1-E | SHADOW8-B-17 | 0.5 | no route | Malfunction indicator lamp (MIL) | — | |
| W32 | OEM-1-O | SHADOW8-B-6 | 0.5 | no route | Alternator control | — | |
| W33 | OEM-1-Q | SHADOW8-B-7 | 0.5 | no route | Charge lamp | — | |
| W34 | OEM-2-M | SHADOW8-B-8 | 0.5 | no route | EGR valve | — | |
| W35 | OEM-2-N | SHADOW8-B-9 | 0.5 | no route | EGR valve | — | |
| W36 | OEM-2-O | SHADOW8-B-22 | 0.5 | no route | EGR valve | — | |
| W37 | OEM-2-P | SHADOW8-B-23 | 0.5 | no route | EGR valve | — | |
| W38 | OEM-3-L | SHADOW8-B-24 | 0.5 | no route | Evap purge solenoid | — | |
| W39 | OEM-3-Q | SHADOW8-B-25 | 0.5 | no route | VICS solenoid (intake butterflies) | — | |
| W40 | OEM-2-L | SHADOW8-A-10 | 0.5 | no route | Mass air flow (MAF) | — | |
| W41 | OEM-3-E | SHADOW8-A-11 | 0.5 | no route | Throttle position (TPS) | — | |
| W42 | OEM-2-C | SHADOW8-A-12 | 0.5 | no route | Front O2 signal | — | |
| W43 | OEM-3-J | SHADOW8-A-13 | 0.5 | no route | Rear O2 signal | — | |
| W44 | OEM-2-E | SHADOW8-A-14 | 0.5 | no route | Coolant temperature (ECT) | — | |
| W45 | OEM-2-B | SHADOW8-A-18 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W46 | OEM-2-A | SHADOW8-A-19 | 0.5 | no route | Fuel tank pressure | — | |
| W47 | OEM-3-K | SHADOW8-A-20 | 0.5 | no route | Fuel level | — | |
| W48 | OEM-3-S | SHADOW8-A-21 | 0.5 | no route | EGR boost sensor | — | |
| W49 | OEM-2-D | SHADOW8-A-26 | 0.5 | no route | Vehicle speed | — | |
| W50 | OEM-1-F | SHADOW8-A-27 | 0.5 | no route | Brake switch | — | |
| W51 | OEM-1-G | SHADOW8-A-28 | 0.5 | no route | Power steering pressure switch | — | |
| W52 | OEM-1-P | SHADOW8-A-29 | 0.5 | no route | A/C request | — | |
| W53 | OEM-1-V | SHADOW8-A-30 | 0.5 | no route | Neutral switch | — | |
| W54 | OEM-3-I | SHADOW8-A-31 | 0.5 | no route | Clutch switch | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 174514-6 | TE | AMP Multilock .040/.070 hybrid 16-pin female harness plug (Miata NB1 ECU) | 1.000 | ea |
| connector | 174515-6 | TE | AMP Multilock .040/.070 hybrid 22-pin female harness plug (Miata NA/NB ECU) | 1.000 | ea |
| connector | 174516-6 | TE | AMP Multilock .040/.070 hybrid 26-pin female harness plug (Miata NA/NB ECU) | 1.000 | ea |
| connector | 4-1437290-0 | TE | Superseal 1.0 34-way plug, Key 1 | 1.000 | ea |
| connector | 4-1437290-1 | TE | Superseal 1.0 34-way plug, Key 2 | 1.000 | ea |
| terminal | 3-1447221-4 | TE | Superseal 1.0 socket terminal, 20 AWG (0.5 sq mm) | 48.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (16)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | PHYS_REQUIRED_OPEN | SHADOW8-B-21 | SHADOW8-B-21 "Digital input 10 / ignition switch" is required but not wired. |
| warn | NET_FAMILY | OEM-2-O ↔ SHADOW8-B-22 | OEM-2-O "EGR valve" [low_side_out] is wired to SHADOW8-B-22 "Aux output 9" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-2-P ↔ SHADOW8-B-23 | OEM-2-P "EGR valve" [low_side_out] is wired to SHADOW8-B-23 "Aux output 10" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-3-L ↔ SHADOW8-B-24 | OEM-3-L "Evap purge solenoid" [low_side_out] is wired to SHADOW8-B-24 "Aux output 11" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-3-Q ↔ SHADOW8-B-25 | OEM-3-Q "VICS solenoid (intake butterflies)" [low_side_out] is wired to SHADOW8-B-25 "Aux output 12" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| info | NET_FAMILY | OEM-1-E ↔ SHADOW8-B-17 | OEM-1-E "Malfunction indicator lamp (MIL)" [low_side_out] is wired to SHADOW8-B-17 "Aux output 8" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-1-O ↔ SHADOW8-B-6 | OEM-1-O "Alternator control" [low_side_out] is wired to SHADOW8-B-6 "Injector cylinder 5" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-1-Q ↔ SHADOW8-B-7 | OEM-1-Q "Charge lamp" [low_side_out] is wired to SHADOW8-B-7 "Injector cylinder 6" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-1-U ↔ SHADOW8-B-14 | OEM-1-U "Front O2 heater" [low_side_out] is wired to SHADOW8-B-14 "Aux output 5" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-2-B ↔ SHADOW8-A-18 | OEM-2-B "Intake air temperature (IAT)" [temp_in] is wired to SHADOW8-A-18 "Analog voltage 6" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-2-E ↔ SHADOW8-A-14 | OEM-2-E "Coolant temperature (ECT)" [temp_in] is wired to SHADOW8-A-14 "Analog voltage 5" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-2-M ↔ SHADOW8-B-8 | OEM-2-M "EGR valve" [low_side_out] is wired to SHADOW8-B-8 "Injector cylinder 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-2-N ↔ SHADOW8-B-9 | OEM-2-N "EGR valve" [low_side_out] is wired to SHADOW8-B-9 "Injector cylinder 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-3-O ↔ SHADOW8-B-16 | OEM-3-O "ISC valve low side" [low_side_out] is wired to SHADOW8-B-16 "Aux output 7" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-3-V ↔ SHADOW8-B-15 | OEM-3-V "Rear O2 heater" [low_side_out] is wired to SHADOW8-B-15 "Aux output 6" [switch_out]. Configure this output as low side. |
| info | UNMAPPED | OEM | 3 optional OEM pins are not mapped: OEM-2-K Tachometer output; OEM-3-T EGR boost solenoid; OEM-3-U Canister drain cut valve (CDCV) |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-06. Review every wire against both manuals before building. Open items: - SHADOW8-B 21: Digital input 10 / ignition switch: required by Emtron Shadow 8 but no stock pin feeds it; wire by hand Not wired: - SHADOW8-A 17: Knock 1 − left open: the stock knock sensor has one ECU wire; check the ECU manual for single-wire knock sensors - OEM-3 T: EGR boost solenoid: no free low_side/ls_hs/injector/hbridge on Emtron Shadow 8 - OEM-3 U: Canister drain cut valve (CDCV): no free low_side/ls_hs/injector/hbridge on Emtron Shadow 8 - OEM-2 K: Tachometer output: no free tacho/frequency_out/low_side/ls_hs on Emtron Shadow 8
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | Emtron Shadow 8 ECU datasheet | https://docs.emtronaustralia.com.au/engine-management/datasheets/shadow-8-datasheet/index.html | archive | 2026-10-05 | f004c9a8d60c |
| 4 | vendor_doc | Emtron Shadow 8 pinout | https://docs.emtronaustralia.com.au/engine-management/wiring/shadow-8/shadow-8-pinout/index.html | archive | 2026-10-05 | f510053951c7 |
| 4 | vendor_doc | Link G4X MX5NB1X install manual (NB1 1999-00) | https://linkecu.com/documentation/MX5XNB1.pdf | archive | 2026-10-05 | 2e36c91270cc |