MX-5 Miata NA8 1996-97 (BP-ZE, 1.8, OBD-II) → Emtron Shadow 8 (auto)
MX-5 Miata NA8 1996-97 (BP-ZE, 1.8, OBD-II) — Emtron — Shadow 8
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-12
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 | draft · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | 2: read the Findings page before cutting any wire |
| Size of the job | 50 wires · 8 connectors · 3 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-4-B | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | SP-14V-1 | SHADOW8-A-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | SHADOW8-B-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-4-I | SHADOW8-B-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-4-A | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-4-C | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-4-D | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-4-K | 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-O | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-4-H | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-0V-1 | SHADOW8-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | SHADOW8-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-3-I | SHADOW8-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-4-E | SHADOW8-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-4-G | SHADOW8-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-4-N | SHADOW8-B-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-4-R | SHADOW8-B-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-4-U | SHADOW8-B-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-4-V | SHADOW8-B-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-4-W | SHADOW8-B-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-4-X | SHADOW8-B-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-3-B | SHADOW8-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-3-F | SHADOW8-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-3-G | SHADOW8-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-1-A | SHADOW8-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-1-B | SHADOW8-B-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-1-G | SHADOW8-B-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-1-U | SHADOW8-B-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-3-M | SHADOW8-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-1-E | SHADOW8-B-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-4-J | SHADOW8-B-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-4-O | SHADOW8-B-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-4-P | SHADOW8-B-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-4-Q | SHADOW8-B-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-4-T | SHADOW8-B-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-3-H | SHADOW8-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-3-N | SHADOW8-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-3-C | SHADOW8-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-3-D | SHADOW8-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-3-K | SHADOW8-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-3-J | SHADOW8-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-1-M | SHADOW8-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-1-C | SHADOW8-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-1-K | SHADOW8-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-1-L | SHADOW8-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-1-Q | SHADOW8-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-3-L | SHADOW8-A-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-3-P | SHADOW8-B-18 | 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-3 | SHADOW8-A-34 | open (OL) | 5 V sensor reference must not touch power ground | |
| 2 | SHADOW8-A-3 | SHADOW8-A-4 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 3 | SHADOW8-A-3 | SHADOW8-A-1 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 4 | SHADOW8-A-3 | SHADOW8-B-1 | open (OL) | 5 V sensor reference must not touch +12 V supply | |
| 5 | SHADOW8-A-34 | SHADOW8-A-1 | open (OL) | power ground must not touch +12 V supply | |
| 6 | SHADOW8-A-34 | SHADOW8-B-1 | open (OL) | power ground must not touch +12 V supply | |
| 7 | SHADOW8-A-4 | SHADOW8-A-1 | open (OL) | sensor ground must not touch +12 V supply | |
| 8 | SHADOW8-A-4 | SHADOW8-B-1 | open (OL) | sensor ground must not touch +12 V supply |
If any reading doesn't match, stop and get help before powering up.
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
OEM-1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Cooling fan relay (low-side) | — | W27 | — | 0.5 | SHADOW8-B-10 | — | — | — |
| B | A/C condenser fan relay | — | W28 | — | 0.5 | SHADOW8-B-11 | — | — | — |
| C | Starter input (12V while cranking) | — | W45 | — | 0.5 | SHADOW8-A-27 | — | — | — |
| E | Check engine light (MIL) | — | W32 | — | 0.5 | SHADOW8-B-15 | — | — | — |
| G | A/C clutch relay | — | W29 | — | 0.5 | SHADOW8-B-12 | — | — | — |
| K | A/C pressure switch (A/C request) | — | W46 | — | 0.5 | SHADOW8-A-28 | — | — | — |
| L | Clutch switch | — | W47 | — | 0.5 | SHADOW8-A-29 | — | — | — |
| M | Vehicle speed sensor (VSS) | — | W44 | — | 0.5 | SHADOW8-A-26 | — | — | — |
| Q | Brake switch | — | W48 | — | 0.5 | SHADOW8-A-30 | — | — | — |
| U | Fuel pump relay (low-side) | — | W30 | — | 0.5 | SHADOW8-B-13 | — | — | — |
OEM-3
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| B | MAF sensor input | — | W24 | — | 0.5 | SHADOW8-A-10 | — | — | — |
| C | Front O2 sensor input | — | W40 | — | 0.5 | SHADOW8-A-18 | — | — | — |
| D | Rear O2 sensor input | — | W41 | — | 0.5 | SHADOW8-A-19 | — | — | — |
| F | Throttle position (TPS) | — | W25 | — | 0.5 | SHADOW8-A-11 | — | — | — |
| G | Engine coolant temp (CLT) | — | W26 | — | 0.5 | SHADOW8-A-12 | — | — | — |
| H | EGR boost sensor | — | W38 | — | 0.5 | SHADOW8-A-13 | — | — | — |
| I | +5V sensor reference | — | W15 | — | 0.5 | SHADOW8-A-3 | — | — | — |
| J | EGR valve position sensor | — | W43 | — | 0.5 | SHADOW8-A-21 | — | — | — |
| K | Intake air temp (IAT) | — | W42 | — | 0.5 | SHADOW8-A-20 | — | — | — |
| L | Idle switch (closed throttle) | — | W49 | — | 0.5 | SHADOW8-A-31 | — | — | — |
| M | Front O2 heater control | — | W31 | — | 0.5 | SHADOW8-B-14 | — | — | — |
| N | EGR boost sensor (2nd channel) | — | W39 | — | 0.5 | SHADOW8-A-14 | — | — | — |
| O | Sensor ground | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| P | Power steering pressure switch | — | W50 | — | 0.5 | SHADOW8-B-18 | — | — | — |
OEM-4
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| A | Chassis ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| B | ECU power +12V (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| C | Chassis ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| D | Chassis ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| E | Crank position (CKP) sensor | — | W16 | — | 0.5 | SHADOW8-A-5 | — | — | — |
| F | CAS SGT (cam trigger) | — | — | — | — | — | — | — | — |
| G | CAS SGC (cam sync) | — | W17 | — | 0.5 | SHADOW8-A-6 | — | — | — |
| H | Crank pickup timing ground (CKP gnd) | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| I | Permanent +12V (battery) | — | W4 | — | 0.85 | SHADOW8-B-1 | — | — | — |
| J | PRC solenoid (FPR control) | — | W33 | — | 0.5 | SHADOW8-B-16 | — | — | — |
| K | Chassis ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| L | Tachometer output | — | — | — | — | — | — | — | — |
| N | Ignition coil trigger (cyl 1&4) | — | W18 | — | 0.5 | SHADOW8-B-27 | — | — | — |
| O | EGR vent solenoid | — | W34 | — | 0.5 | SHADOW8-B-17 | — | — | — |
| P | EGR vacuum solenoid | — | W35 | — | 0.5 | SHADOW8-B-6 | — | — | — |
| Q | Idle air control (IAC) valve | — | W36 | — | 0.5 | SHADOW8-B-7 | — | — | — |
| R | Ignition coil trigger (cyl 2&3) | — | W19 | — | 0.5 | SHADOW8-B-28 | — | — | — |
| T | EVAP purge solenoid | — | W37 | — | 0.5 | SHADOW8-B-8 | — | — | — |
| U | Injector 1 (cyl 1) | — | W20 | — | 0.5 | SHADOW8-B-2 | — | — | — |
| V | Injector 2 (cyl 2) | — | W21 | — | 0.5 | SHADOW8-B-3 | — | — | — |
| W | Injector 3 (cyl 3) | — | W22 | — | 0.5 | SHADOW8-B-4 | — | — | — |
| X | Injector 4 (cyl 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 | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | 8.0V sensor supply | — | — | — | — | — | — | — | — |
| 3 | 5.0V sensor supply | — | W15 | — | 0.5 | OEM-3-I | — | — | — |
| 4 | 0V analog reference | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | Crank position sensor | — | W16 | — | 0.5 | OEM-4-E | — | — | — |
| 6 | Sync position sensor | — | W17 | — | 0.5 | OEM-4-G | — | — | — |
| 7 | Trigger ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Shield | — | — | — | — | — | — | — | — |
| 9 | Ground 1 | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 10 | Analog voltage 1 | — | W24 | — | 0.5 | OEM-3-B | — | — | — |
| 11 | Analog voltage 2 | — | W25 | — | 0.5 | OEM-3-F | — | — | — |
| 12 | Analog voltage 3 | — | W26 | — | 0.5 | OEM-3-G | — | — | — |
| 13 | Analog voltage 4 | — | W38 | — | 0.5 | OEM-3-H | — | — | — |
| 14 | Analog voltage 5 | — | W39 | — | 0.5 | OEM-3-N | — | — | — |
| 15 | CAN bus 1 high | — | — | — | — | — | — | — | — |
| 16 | Knock 1 + | — | — | — | — | — | — | — | — |
| 17 | Knock 1 − | — | — | — | — | — | — | — | — |
| 18 | Analog voltage 6 | — | W40 | — | 0.5 | OEM-3-C | — | — | — |
| 19 | Analog voltage 7 (switchable 1k pull-up) | — | W41 | — | 0.5 | OEM-3-D | — | — | — |
| 20 | Analog voltage 8 (switchable 1k pull-up) | — | W42 | — | 0.5 | OEM-3-K | — | — | — |
| 21 | Analog voltage 9 (switchable 1k pull-up) | — | W43 | — | 0.5 | OEM-3-J | — | — | — |
| 22 | Analog voltage 10 (switchable 1k pull-up) | — | — | — | — | — | — | — | — |
| 23 | CAN bus 1 low | — | — | — | — | — | — | — | — |
| 24 | Knock 2 + | — | — | — | — | — | — | — | — |
| 25 | Knock 2 − | — | — | — | — | — | — | — | — |
| 26 | Digital input 1 | — | W44 | — | 0.5 | OEM-1-M | — | — | — |
| 27 | Digital input 2 | — | W45 | — | 0.5 | OEM-1-C | — | — | — |
| 28 | Digital input 3 | — | W46 | — | 0.5 | OEM-1-K | — | — | — |
| 29 | Digital input 4 | — | W47 | — | 0.5 | OEM-1-L | — | — | — |
| 30 | Digital input 5 | — | W48 | — | 0.5 | OEM-1-Q | — | — | — |
| 31 | Digital input 6 | — | W49 | — | 0.5 | OEM-3-L | — | — | — |
| 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 | — | W4 | — | 0.85 | OEM-4-I | — | — | — |
| 2 | Injector cylinder 1 | — | W20 | — | 0.5 | OEM-4-U | — | — | — |
| 3 | Injector cylinder 2 | — | W21 | — | 0.5 | OEM-4-V | — | — | — |
| 4 | Injector cylinder 3 | — | W22 | — | 0.5 | OEM-4-W | — | — | — |
| 5 | Injector cylinder 4 | — | W23 | — | 0.5 | OEM-4-X | — | — | — |
| 6 | Injector cylinder 5 | — | W35 | — | 0.5 | OEM-4-P | — | — | — |
| 7 | Injector cylinder 6 | — | W36 | — | 0.5 | OEM-4-Q | — | — | — |
| 8 | Injector cylinder 7 | — | W37 | — | 0.5 | OEM-4-T | — | — | — |
| 9 | Injector cylinder 8 | — | — | — | — | — | — | — | — |
| 10 | Aux output 1 | — | W27 | — | 0.5 | OEM-1-A | — | — | — |
| 11 | Aux output 2 | — | W28 | — | 0.5 | OEM-1-B | — | — | — |
| 12 | Aux output 3 | — | W29 | — | 0.5 | OEM-1-G | — | — | — |
| 13 | Aux output 4 | — | W30 | — | 0.5 | OEM-1-U | — | — | — |
| 14 | Aux output 5 | — | W31 | — | 0.5 | OEM-3-M | — | — | — |
| 15 | Aux output 6 | — | W32 | — | 0.5 | OEM-1-E | — | — | — |
| 16 | Aux output 7 | — | W33 | — | 0.5 | OEM-4-J | — | — | — |
| 17 | Aux output 8 | — | W34 | — | 0.5 | OEM-4-O | — | — | — |
| 18 | Digital input 7 | — | W50 | — | 0.5 | OEM-3-P | — | — | — |
| 19 | Digital input 8 | — | — | — | — | — | — | — | — |
| 20 | Digital input 9 | — | — | — | — | — | — | — | — |
| 21 | Digital input 10 / ignition switch | — | — | — | — | — | — | — | — |
| 22 | Aux output 9 | — | — | — | — | — | — | — | — |
| 23 | Aux output 10 | — | — | — | — | — | — | — | — |
| 24 | Aux output 11 | — | — | — | — | — | — | — | — |
| 25 | Aux output 12 | — | — | — | — | — | — | — | — |
| 26 | Aux 9–12 power supply | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 27 | Ignition TTL cylinder 1 | — | W18 | — | 0.5 | OEM-4-N | — | — | — |
| 28 | Ignition TTL cylinder 2 | — | W19 | — | 0.5 | OEM-4-R | — | — | — |
| 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 | — | — | W14 | — | 0.5 | SHADOW8-A-7 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-3-O | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-4-H | — | — | — |
| 1 | — | — | W13 | — | 0.5 | SHADOW8-A-4 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-4-B | — | — | — |
| 1 | — | — | W2 | — | 0.85 | SHADOW8-A-1 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | SHADOW8-B-26 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-4-A | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-4-C | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-4-D | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-4-K | — | — | — |
| 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 | Cooling fan relay (low-side) | low_side_out | SHADOW8-B-10 | Aux output 1 | low_side_out | corroborated | |
| OEM-1-B | A/C condenser fan relay | low_side_out | SHADOW8-B-11 | Aux output 2 | low_side_out | corroborated | |
| OEM-1-C | Starter input (12V while cranking) | digital_in | SHADOW8-A-27 | Digital input 2 | digital_in | corroborated | |
| OEM-1-E | Check engine light (MIL) | low_side_out | SHADOW8-B-15 | Aux output 6 | switch_out | corroborated | |
| OEM-1-G | A/C clutch relay | low_side_out | SHADOW8-B-12 | Aux output 3 | low_side_out | corroborated | |
| OEM-1-K | A/C pressure switch (A/C request) | digital_in | SHADOW8-A-28 | Digital input 3 | digital_in | corroborated | |
| OEM-1-L | Clutch switch | digital_in | SHADOW8-A-29 | Digital input 4 | digital_in | corroborated | |
| OEM-1-M | Vehicle speed sensor (VSS) | digital_in | SHADOW8-A-26 | Digital input 1 | digital_in | corroborated | |
| OEM-1-Q | Brake switch | digital_in | SHADOW8-A-30 | Digital input 5 | digital_in | corroborated | |
| OEM-1-U | Fuel pump relay (low-side) | low_side_out | SHADOW8-B-13 | Aux output 4 | low_side_out | corroborated | |
| OEM-3-B | MAF sensor input | analog_in | SHADOW8-A-10 | Analog voltage 1 | analog_in | corroborated | |
| OEM-3-C | Front O2 sensor input | lambda_nb_in | SHADOW8-A-18 | Analog voltage 6 | analog_in | corroborated | |
| OEM-3-D | Rear O2 sensor input | lambda_nb_in | SHADOW8-A-19 | Analog voltage 7 (switchable 1k pull-up) | analog_in | corroborated | |
| OEM-3-F | Throttle position (TPS) | analog_in | SHADOW8-A-11 | Analog voltage 2 | analog_in | corroborated | |
| OEM-3-G | Engine coolant temp (CLT) | temp_in | SHADOW8-A-12 | Analog voltage 3 | analog_in | corroborated | |
| OEM-3-H | EGR boost sensor | analog_in | SHADOW8-A-13 | Analog voltage 4 | analog_in | corroborated | |
| OEM-3-I | +5V sensor reference | vref | SHADOW8-A-3 | 5.0V sensor supply | vref | corroborated | |
| OEM-3-J | EGR valve position sensor | analog_in | SHADOW8-A-21 | Analog voltage 9 (switchable 1k pull-up) | analog_in | corroborated | |
| OEM-3-K | Intake air temp (IAT) | temp_in | SHADOW8-A-20 | Analog voltage 8 (switchable 1k pull-up) | analog_in | corroborated | |
| OEM-3-L | Idle switch (closed throttle) | digital_in | SHADOW8-A-31 | Digital input 6 | digital_in | corroborated | |
| OEM-3-M | Front O2 heater control | low_side_out | SHADOW8-B-14 | Aux output 5 | switch_out | corroborated | |
| OEM-3-N | EGR boost sensor (2nd channel) | analog_in | SHADOW8-A-14 | Analog voltage 5 | analog_in | corroborated | |
| OEM-3-O | Sensor ground | sensor_ground | SHADOW8-A-4 + SHADOW8-A-7 | 0V analog reference + Trigger ground | sensor_ground | corroborated | |
| OEM-3-P | Power steering pressure switch | digital_in | SHADOW8-B-18 | Digital input 7 | digital_in | corroborated | |
| OEM-4-A | Chassis ground | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | corroborated | |
| OEM-4-B | ECU power +12V (main relay) | power_in | SHADOW8-A-1 + SHADOW8-B-26 | ECU supply + Aux 9–12 power supply | power_in | corroborated | |
| OEM-4-C | Chassis ground | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | corroborated | |
| OEM-4-D | Chassis ground | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | corroborated | |
| OEM-4-E | Crank position (CKP) sensor | trigger_in | SHADOW8-A-5 | Crank position sensor | trigger_in | corroborated | |
| OEM-4-F | CAS SGT (cam trigger) | trigger_in | — | — | — | corroborated | |
| OEM-4-G | CAS SGC (cam sync) | trigger_in | SHADOW8-A-6 | Sync position sensor | trigger_in | corroborated | |
| OEM-4-H | Crank pickup timing ground (CKP gnd) | sensor_ground | SHADOW8-A-4 + SHADOW8-A-7 | 0V analog reference + Trigger ground | sensor_ground | corroborated | |
| OEM-4-I | Permanent +12V (battery) | power_in | SHADOW8-B-1 | Battery constant (HOT) supply | power_in | corroborated | |
| OEM-4-J | PRC solenoid (FPR control) | low_side_out | SHADOW8-B-16 | Aux output 7 | switch_out | corroborated | |
| OEM-4-K | Chassis ground | ground | SHADOW8-A-34 + SHADOW8-A-9 | Ground 2 + Ground 1 | ground | corroborated | |
| OEM-4-L | Tachometer output | tacho_out | — | — | — | corroborated | |
| OEM-4-N | Ignition coil trigger (cyl 1&4) | ignition_out | SHADOW8-B-27 | Ignition TTL cylinder 1 | ignition_out | corroborated | |
| OEM-4-O | EGR vent solenoid | low_side_out | SHADOW8-B-17 | Aux output 8 | switch_out | corroborated | |
| OEM-4-P | EGR vacuum solenoid | low_side_out | SHADOW8-B-6 | Injector cylinder 5 | injector_out | corroborated | |
| OEM-4-Q | Idle air control (IAC) valve | low_side_out | SHADOW8-B-7 | Injector cylinder 6 | injector_out | corroborated | |
| OEM-4-R | Ignition coil trigger (cyl 2&3) | ignition_out | SHADOW8-B-28 | Ignition TTL cylinder 2 | ignition_out | corroborated | |
| OEM-4-T | EVAP purge solenoid | low_side_out | SHADOW8-B-8 | Injector cylinder 7 | injector_out | corroborated | |
| OEM-4-U | Injector 1 (cyl 1) | injector_out | SHADOW8-B-2 | Injector cylinder 1 | injector_out | corroborated | |
| OEM-4-V | Injector 2 (cyl 2) | injector_out | SHADOW8-B-3 | Injector cylinder 2 | injector_out | corroborated | |
| OEM-4-W | Injector 3 (cyl 3) | injector_out | SHADOW8-B-4 | Injector cylinder 3 | injector_out | corroborated | |
| OEM-4-X | Injector 4 (cyl 4) | injector_out | SHADOW8-B-5 | Injector cylinder 4 | injector_out | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-4-B | SP-14V-1 | 0.85 | no route | ECU power +12V (main relay) | — | |
| W2 | SP-14V-1 | SHADOW8-A-1 | 0.85 | no route | ECU supply | — | |
| W3 | SP-14V-1 | SHADOW8-B-26 | 0.85 | no route | Aux 9–12 power supply | — | |
| W4 | OEM-4-I | SHADOW8-B-1 | 0.85 | no route | Permanent +12V (battery) | — | |
| W5 | OEM-4-A | SP-GND-1 | 0.85 | no route | Chassis ground | — | |
| W6 | OEM-4-C | SP-GND-1 | 0.85 | no route | Chassis ground | — | |
| W7 | OEM-4-D | SP-GND-1 | 0.85 | no route | Chassis ground | — | |
| W8 | OEM-4-K | SP-GND-1 | 0.85 | no route | Chassis 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-O | SP-0V-1 | 0.5 | no route | Sensor ground | — | |
| W12 | OEM-4-H | SP-0V-1 | 0.5 | no route | Crank pickup timing ground (CKP gnd) | — | |
| W13 | SP-0V-1 | SHADOW8-A-4 | 0.5 | no route | 0V analog reference | — | |
| W14 | SP-0V-1 | SHADOW8-A-7 | 0.5 | no route | Trigger ground | — | |
| W15 | OEM-3-I | SHADOW8-A-3 | 0.5 | no route | +5V sensor reference | — | |
| W16 | OEM-4-E | SHADOW8-A-5 | 0.5 | no route | Crank position (CKP) sensor | — | |
| W17 | OEM-4-G | SHADOW8-A-6 | 0.5 | no route | CAS SGC (cam sync) | — | |
| W18 | OEM-4-N | SHADOW8-B-27 | 0.5 | no route | Ignition coil trigger (cyl 1&4) | — | |
| W19 | OEM-4-R | SHADOW8-B-28 | 0.5 | no route | Ignition coil trigger (cyl 2&3) | — | |
| W20 | OEM-4-U | SHADOW8-B-2 | 0.5 | no route | Injector 1 (cyl 1) | — | |
| W21 | OEM-4-V | SHADOW8-B-3 | 0.5 | no route | Injector 2 (cyl 2) | — | |
| W22 | OEM-4-W | SHADOW8-B-4 | 0.5 | no route | Injector 3 (cyl 3) | — | |
| W23 | OEM-4-X | SHADOW8-B-5 | 0.5 | no route | Injector 4 (cyl 4) | — | |
| W24 | OEM-3-B | SHADOW8-A-10 | 0.5 | no route | MAF sensor input | — | |
| W25 | OEM-3-F | SHADOW8-A-11 | 0.5 | no route | Throttle position (TPS) | — | |
| W26 | OEM-3-G | SHADOW8-A-12 | 0.5 | no route | Engine coolant temp (CLT) | — | |
| W27 | OEM-1-A | SHADOW8-B-10 | 0.5 | no route | Cooling fan relay (low-side) | — | |
| W28 | OEM-1-B | SHADOW8-B-11 | 0.5 | no route | A/C condenser fan relay | — | |
| W29 | OEM-1-G | SHADOW8-B-12 | 0.5 | no route | A/C clutch relay | — | |
| W30 | OEM-1-U | SHADOW8-B-13 | 0.5 | no route | Fuel pump relay (low-side) | — | |
| W31 | OEM-3-M | SHADOW8-B-14 | 0.5 | no route | Front O2 heater control | — | |
| W32 | OEM-1-E | SHADOW8-B-15 | 0.5 | no route | Check engine light (MIL) | — | |
| W33 | OEM-4-J | SHADOW8-B-16 | 0.5 | no route | PRC solenoid (FPR control) | — | |
| W34 | OEM-4-O | SHADOW8-B-17 | 0.5 | no route | EGR vent solenoid | — | |
| W35 | OEM-4-P | SHADOW8-B-6 | 0.5 | no route | EGR vacuum solenoid | — | |
| W36 | OEM-4-Q | SHADOW8-B-7 | 0.5 | no route | Idle air control (IAC) valve | — | |
| W37 | OEM-4-T | SHADOW8-B-8 | 0.5 | no route | EVAP purge solenoid | — | |
| W38 | OEM-3-H | SHADOW8-A-13 | 0.5 | no route | EGR boost sensor | — | |
| W39 | OEM-3-N | SHADOW8-A-14 | 0.5 | no route | EGR boost sensor (2nd channel) | — | |
| W40 | OEM-3-C | SHADOW8-A-18 | 0.5 | no route | Front O2 sensor input | — | |
| W41 | OEM-3-D | SHADOW8-A-19 | 0.5 | no route | Rear O2 sensor input | — | |
| W42 | OEM-3-K | SHADOW8-A-20 | 0.5 | no route | Intake air temp (IAT) | — | |
| W43 | OEM-3-J | SHADOW8-A-21 | 0.5 | no route | EGR valve position sensor | — | |
| W44 | OEM-1-M | SHADOW8-A-26 | 0.5 | no route | Vehicle speed sensor (VSS) | — | |
| W45 | OEM-1-C | SHADOW8-A-27 | 0.5 | no route | Starter input (12V while cranking) | — | |
| W46 | OEM-1-K | SHADOW8-A-28 | 0.5 | no route | A/C pressure switch (A/C request) | — | |
| W47 | OEM-1-L | SHADOW8-A-29 | 0.5 | no route | Clutch switch | — | |
| W48 | OEM-1-Q | SHADOW8-A-30 | 0.5 | no route | Brake switch | — | |
| W49 | OEM-3-L | SHADOW8-A-31 | 0.5 | no route | Idle switch (closed throttle) | — | |
| W50 | OEM-3-P | SHADOW8-B-18 | 0.5 | no route | Power steering pressure switch | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| 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) | 43.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (12)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | PHYS_REQUIRED_OPEN | SHADOW8-B-21 | SHADOW8-B-21 "Digital input 10 / ignition switch" is required but not wired. |
| error | REQUIRED_UNMAPPED | OEM-4-F | Required OEM function "CAS SGT (cam trigger)" (trigger_in) is not connected to the new ECU. |
| info | NET_FAMILY | OEM-1-E ↔ SHADOW8-B-15 | OEM-1-E "Check engine light (MIL)" [low_side_out] is wired to SHADOW8-B-15 "Aux output 6" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-3-G ↔ SHADOW8-A-12 | OEM-3-G "Engine coolant temp (CLT)" [temp_in] is wired to SHADOW8-A-12 "Analog voltage 3" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-3-K ↔ SHADOW8-A-20 | OEM-3-K "Intake air temp (IAT)" [temp_in] is wired to SHADOW8-A-20 "Analog voltage 8 (switchable 1k pull-up)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-3-M ↔ SHADOW8-B-14 | OEM-3-M "Front O2 heater control" [low_side_out] is wired to SHADOW8-B-14 "Aux output 5" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-4-J ↔ SHADOW8-B-16 | OEM-4-J "PRC solenoid (FPR control)" [low_side_out] is wired to SHADOW8-B-16 "Aux output 7" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-4-O ↔ SHADOW8-B-17 | OEM-4-O "EGR vent solenoid" [low_side_out] is wired to SHADOW8-B-17 "Aux output 8" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-4-P ↔ SHADOW8-B-6 | OEM-4-P "EGR vacuum solenoid" [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-4-Q ↔ SHADOW8-B-7 | OEM-4-Q "Idle air control (IAC) valve" [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-4-T ↔ SHADOW8-B-8 | OEM-4-T "EVAP purge solenoid" [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 | UNMAPPED | OEM | 1 optional OEM pins are not mapped: OEM-4-L Tachometer output |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Open items: - OEM-4 F: CAS SGT (cam trigger): no free cam_hall/cam_vr/frequency_in input on Emtron Shadow 8 - SHADOW8-B 21: Digital input 10 / ignition switch: required by Emtron Shadow 8 but no stock pin feeds it; wire by hand Not wired: - OEM-4 L: 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 | AEM EMS 30-1720 Plug-and-Play adapter manual (1996-97 Miata) | https://static.summitracing.com/global/images/instructions/avm-30-1720.pdf | — | — | — |
| 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 |
| 3 | community_copy | Mellens.net: 1996 Mazda Miata wiring diagrams (FSM-derived) | http://www.mellens.net/mazda/mazda_miata_extra_manual/1996_wiring.pdf | — | — | — |