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.
Components
| Ref | Kind | Part | Exclude from BOM |
|---|---|---|---|
| MAIN-R | connector | ||
| NEW-BATT | terminal | ||
| NEW-KEYON | terminal | ||
| OEM-A | connector | ||
| OEM-B | connector | ||
| OEM-C | connector | ||
| OEM-D | connector | ||
| SP-0V | splice | ||
| SP-14V | splice | ||
| SP-GND | splice | ||
| SPEEDUINO-A | connector | ||
| SPEEDUINO-PWR | connector |
Create part
Cut list
Lengths need a layout (0 of 41 routed).
| Wire | From / To | Gauge | Signal |
|---|---|---|---|
| W1 | OEM-D-4A / SP-14V-1 | 0.85 | ECU main power (+12V via main relay/ECR) |
| W2 | OEM-D-4E / SP-14V-1 | 0.85 | ECU main power (+12V via main relay/ECR) |
| W3 | NEW-KEYON-1 / MAIN-R-COIL+ | 0.5 | Relay coil positive (ignition-switched +12V) |
| W4 | NEW-BATT-1 / MAIN-R-IN | 0.85 | Relay contact input (battery + via main fuse) |
| W5 | MAIN-R-COIL- / SP-GND-1 | 0.5 | Relay coil negative (ECU low-side driver) |
| W6 | MAIN-R-OUT / SPEEDUINO-PWR-12V | 0.85 | Relay contact output (switched +12V bus) |
| W7 | OEM-A-1AF / SP-GND-1 | 0.85 | Power ground |
| W8 | OEM-A-1AJ / SP-GND-1 | 0.85 | Power ground |
| W9 | OEM-A-1L / SP-GND-1 | 0.85 | Power ground |
| W10 | SP-GND-1 / SPEEDUINO-A-10 | 0.85 | Ground |
| W11 | SP-GND-1 / SPEEDUINO-A-9 | 0.85 | Ground |
| W12 | OEM-A-1AB / SP-0V-1 | 0.5 | Sensor ground |
| W13 | OEM-A-1X / SP-0V-1 | 0.5 | Sensor ground |
| W14 | OEM-C-3AB / SP-0V-1 | 0.5 | Sensor ground |
| W15 | OEM-C-3S / SP-0V-1 | 0.5 | Sensor ground (CAS) |
| W16 | SP-0V-1 / SPEEDUINO-A-12 | 0.5 | Ground |
| W17 | SP-0V-1 / SPEEDUINO-A-23 | 0.5 | Ground |
| W18 | OEM-C-3A / SPEEDUINO-A-13 | 0.5 | +5V sensor supply |
| W19 | OEM-C-3R / SPEEDUINO-A-25 | 0.5 | Crank position (CAS NE) |
| W20 | OEM-C-3U / SPEEDUINO-A-24 | 0.5 | Home position (CAS G) |
| W21 | OEM-D-4AF / SPEEDUINO-A-7 | 0.5 | Ignition front trailing |
| W22 | OEM-D-4AJ / SPEEDUINO-A-34 | 0.5 | Ignition rear trailing |
| W23 | OEM-D-4AN / SPEEDUINO-A-33 | 0.5 | Ignition leading (wasted spark) |
| W24 | OEM-A-1Q / SPEEDUINO-A-1 | 0.5 | Injector 1 (front primary) |
| W25 | OEM-A-1U / SPEEDUINO-A-2 | 0.5 | Injector 2 (rear primary) |
| W26 | OEM-A-1Y / SPEEDUINO-A-3 | 0.5 | Injector 3 (front secondary) |
| W27 | OEM-A-1AC / SPEEDUINO-A-5 | 0.5 | Injector 4 (rear secondary) |
| W28 | OEM-D-4AH / SPEEDUINO-A-11 | 0.5 | MAP sensor (PIM) |
| W29 | OEM-C-3I / SPEEDUINO-A-22 | 0.5 | Throttle position (TPS, full range) |
| W30 | OEM-C-3W / SPEEDUINO-A-19 | 0.5 | Coolant temperature (ECT) |
| W31 | OEM-A-1H / SPEEDUINO-A-16 | 0.5 | Cooling fan relay (low speed) |
| W32 | OEM-D-4D / SPEEDUINO-A-15 | 0.5 | Air pump clutch relay |
| W33 | OEM-D-4F / SPEEDUINO-A-36 | 0.5 | Fuel pump speed relay |
| W34 | OEM-D-4G / SPEEDUINO-A-35 | 0.5 | Fuel pump relay |
| W35 | OEM-D-4I / SPEEDUINO-A-37 | 0.5 | A/C relay |
| W36 | OEM-D-4K / SPEEDUINO-A-38 | 0.5 | Cooling fan relay (low speed) |
| W37 | OEM-D-4M / SPEEDUINO-A-17 | 0.5 | Tachometer output |
| W38 | OEM-C-3D / SPEEDUINO-A-21 | 0.5 | O2 sensor (narrowband) |
| W39 | OEM-C-3T / SPEEDUINO-A-20 | 0.5 | Intake air temperature (IAT) |
| W40 | OEM-D-4Q / SPEEDUINO-A-14 | 0.5 | Vehicle speed sensor |
| W41 | OEM-D-4AA / SPEEDUINO-A-18 | 0.5 | Brake pedal switch |
Bill of materials
No parts in this harness.