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 | ||
| OEM-B74 | connector | ||
| OEM-B75 | connector | ||
| OEM-B76 | connector | ||
| OEM-B77 | connector | ||
| OEM-B78 | connector | ||
| OEM-B79 | 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 47 routed).
| Wire | From / To | Gauge | Signal |
|---|---|---|---|
| W1 | OEM-B78-16 / SP-14V-1 | 0.85 | EFI main relay power (+B) |
| W2 | OEM-B78-7 / SP-14V-1 | 0.85 | ETCS-i power (+BM) |
| W3 | OEM-B78-8 / SP-14V-1 | 0.85 | EFI main relay power (+B2) |
| W4 | OEM-B78-9 / MAIN-R-COIL+ | 0.5 | Ignition switch (IGSW) |
| W5 | NEW-BATT-1 / MAIN-R-IN | 0.85 | Relay contact input (battery + via main fuse) |
| W6 | MAIN-R-COIL- / SP-GND-1 | 0.5 | Relay coil negative (ECU low-side driver) |
| W7 | MAIN-R-OUT / SPEEDUINO-PWR-12V | 0.85 | Relay contact output (switched +12V bus) |
| W8 | OEM-B74-21 / SP-GND-1 | 0.85 | Power ground (E01) |
| W9 | OEM-B74-31 / SP-GND-1 | 0.85 | Power ground (E02) |
| W10 | OEM-B74-9 / SP-GND-1 | 0.85 | ETCS-i ground (ME01) |
| W11 | OEM-B75-17 / SP-GND-1 | 0.85 | Power ground (E1) |
| W12 | SP-GND-1 / SPEEDUINO-A-10 | 0.85 | Ground |
| W13 | SP-GND-1 / SPEEDUINO-A-9 | 0.85 | Ground |
| W14 | OEM-B74-22 / SP-0V-1 | 0.5 | Crank/cam sensor return (NE-) |
| W15 | OEM-B75-18 / SP-0V-1 | 0.5 | Sensor ground (E2) |
| W16 | OEM-B75-19 / SP-0V-1 | 0.5 | MAF ground (EVG) |
| W17 | OEM-B78-22 / SP-0V-1 | 0.5 | Switch ground (EC) |
| W18 | SP-0V-1 / SPEEDUINO-A-12 | 0.5 | Ground |
| W19 | SP-0V-1 / SPEEDUINO-A-23 | 0.5 | Ground |
| W20 | OEM-B75-2 / SPEEDUINO-A-13 | 0.5 | Sensor power (VC) |
| W21 | OEM-B74-23 / SPEEDUINO-A-25 | 0.5 | Crank position (NE+) |
| W22 | OEM-B74-10 / SPEEDUINO-A-24 | 0.5 | Cam position (G2) |
| W23 | OEM-B74-11 / SPEEDUINO-A-7 | 0.5 | Ignition 1 (IGT, cyl 1&6) |
| W24 | OEM-B74-12 / SPEEDUINO-A-34 | 0.5 | Ignition 2 (IGT2, cyl 5&2) |
| W25 | OEM-B74-13 / SPEEDUINO-A-33 | 0.5 | Ignition 3 (IGT3, cyl 3&4) |
| W26 | OEM-B75-5 / SPEEDUINO-A-1 | 0.5 | Injector 1 (#10) |
| W27 | OEM-B75-6 / SPEEDUINO-A-2 | 0.5 | Injector 2 (#20) |
| W28 | OEM-B74-1 / SPEEDUINO-A-3 | 0.5 | Injector 3 (#30) |
| W29 | OEM-B74-2 / SPEEDUINO-A-5 | 0.5 | Injector 4 (#40) |
| W30 | OEM-B74-3 / SPEEDUINO-A-1 | 0.5 | Injector 5 (#50) |
| W31 | OEM-B74-4 / SPEEDUINO-A-2 | 0.5 | Injector 6 (#60) |
| W32 | OEM-B74-7 / SPEEDUINO-A-32 | 0.5 | ETCS-i motor − (M−) |
| W33 | OEM-B74-8 / SPEEDUINO-A-31 | 0.5 | ETCS-i motor + (M+) |
| W34 | OEM-B74-17 / SPEEDUINO-A-15 | 0.5 | VVT-i OCV - (OCV-) |
| W35 | OEM-B74-18 / SPEEDUINO-A-36 | 0.5 | VVT-i OCV + (OCV+) |
| W36 | OEM-B74-19 / SPEEDUINO-A-35 | 0.5 | ETCS-i clutch - (CL-) |
| W37 | OEM-B74-20 / SPEEDUINO-A-37 | 0.5 | ETCS-i clutch + (CL+) |
| W38 | OEM-B75-9 / SPEEDUINO-A-11 | 0.5 | Manifold pressure (PIM) |
| W39 | OEM-B75-15 / SPEEDUINO-A-22 | 0.5 | Accelerator pedal 1 (VPA) |
| W40 | OEM-B75-14 / SPEEDUINO-A-19 | 0.5 | Coolant temperature (THW) |
| W41 | OEM-B77-13 / SPEEDUINO-A-16 | 0.5 | A/C clutch relay (ACMG) |
| W42 | OEM-B78-10 / SPEEDUINO-A-38 | 0.5 | EFI main relay control (M-REL) |
| W43 | OEM-B77-20 / SPEEDUINO-A-17 | 0.5 | Tachometer output (TACH) |
| W44 | OEM-B75-12 / SPEEDUINO-A-21 | 0.5 | O2 sensor (OX) |
| W45 | OEM-B75-22 / SPEEDUINO-A-20 | 0.5 | Intake air temperature (THA) |
| W46 | OEM-B77-25 / SPEEDUINO-A-14 | 0.5 | No.1 speed sensor (SPD) |
| W47 | OEM-B76-11 / SPEEDUINO-A-18 | 0.5 | No.2 speed sensor return (SP2-) |
Bill of materials
No parts in this harness.