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 | ||
| NEXUSS3-A | connector | ||
| NEXUSS3-C | connector | ||
| OEM-A | connector | ||
| OEM-B | connector | ||
| OEM-C | connector | ||
| OEM-D | connector | ||
| SP-0V | splice | ||
| SP-14V | splice | ||
| SP-GND | splice |
Create part
Cut list
Lengths need a layout (0 of 56 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 / NEXUSS3-A-18 | 0.85 | Relay contact output (switched +12V bus) |
| W7 | MAIN-R-OUT / NEXUSS3-A-25 | 0.85 | Relay contact output (switched +12V bus) |
| W8 | OEM-A-1AF / SP-GND-1 | 0.85 | Power ground |
| W9 | OEM-A-1AJ / SP-GND-1 | 0.85 | Power ground |
| W10 | OEM-A-1L / SP-GND-1 | 0.85 | Power ground |
| W11 | SP-GND-1 / NEXUSS3-A-10 | 0.85 | Battery ground |
| W12 | SP-GND-1 / NEXUSS3-A-11 | 0.85 | Battery ground |
| W13 | OEM-A-1AB / SP-0V-1 | 0.5 | Sensor ground |
| W14 | OEM-A-1X / SP-0V-1 | 0.5 | Sensor ground |
| W15 | OEM-C-3AB / SP-0V-1 | 0.5 | Sensor ground |
| W16 | OEM-C-3S / SP-0V-1 | 0.5 | Sensor ground (CAS) |
| W17 | SP-0V-1 / NEXUSS3-C-26 | 0.5 | Signal ground |
| W18 | OEM-C-3A / NEXUSS3-C-25 | 0.5 | +5V sensor supply |
| W19 | OEM-C-3R / NEXUSS3-C-1 | 0.5 | Crank position (CAS NE) |
| W20 | SP-0V-1 / NEXUSS3-C-2 | 0.5 | Trigger - |
| W21 | OEM-C-3U / NEXUSS3-C-3 | 0.5 | Home position (CAS G) |
| W22 | SP-0V-1 / NEXUSS3-C-4 | 0.5 | Home - |
| W23 | OEM-C-3O / NEXUSS3-C-23 | 0.5 | Knock sensor |
| W24 | OEM-D-4AF / NEXUSS3-A-27 | 0.5 | Ignition front trailing |
| W25 | OEM-D-4AJ / NEXUSS3-A-28 | 0.5 | Ignition rear trailing |
| W26 | OEM-D-4AN / NEXUSS3-A-29 | 0.5 | Ignition leading (wasted spark) |
| W27 | OEM-A-1Q / NEXUSS3-A-1 | 0.5 | Injector 1 (front primary) |
| W28 | OEM-A-1U / NEXUSS3-A-2 | 0.5 | Injector 2 (rear primary) |
| W29 | OEM-A-1Y / NEXUSS3-A-3 | 0.5 | Injector 3 (front secondary) |
| W30 | OEM-A-1AC / NEXUSS3-A-4 | 0.5 | Injector 4 (rear secondary) |
| W31 | OEM-D-4AH / NEXUSS3-C-10 | 0.5 | MAP sensor (PIM) |
| W32 | OEM-C-3I / NEXUSS3-C-11 | 0.5 | Throttle position (TPS, full range) |
| W33 | OEM-C-3W / NEXUSS3-C-12 | 0.5 | Coolant temperature (ECT) |
| W34 | OEM-A-1H / NEXUSS3-A-26 | 0.5 | Cooling fan relay (low speed) |
| W35 | OEM-D-4D / NEXUSS3-A-9 | 0.5 | Air pump clutch relay |
| W36 | OEM-D-4F / NEXUSS3-A-12 | 0.5 | Fuel pump speed relay |
| W37 | OEM-D-4G / NEXUSS3-A-14 | 0.5 | Fuel pump relay |
| W38 | OEM-D-4I / NEXUSS3-A-15 | 0.5 | A/C relay |
| W39 | OEM-D-4K / NEXUSS3-A-16 | 0.5 | Cooling fan relay (low speed) |
| W40 | OEM-D-4L / NEXUSS3-A-17 | 0.5 | Cooling fan relay (high speed) |
| W41 | OEM-A-1C / NEXUSS3-C-33 | 0.5 | Idle speed control (ISC) solenoid |
| W42 | OEM-A-1E / NEXUSS3-A-5 | 0.5 | Turbo charge control solenoid |
| W43 | OEM-A-1G / NEXUSS3-A-6 | 0.5 | Purge solenoid |
| W44 | OEM-A-1I / NEXUSS3-A-7 | 0.5 | Turbo charge relief solenoid |
| W45 | OEM-A-1K / NEXUSS3-A-8 | 0.5 | Turbo pre-control solenoid |
| W46 | OEM-C-3D / NEXUSS3-C-13 | 0.5 | O2 sensor (narrowband) |
| W47 | OEM-C-3T / NEXUSS3-C-14 | 0.5 | Intake air temperature (IAT) |
| W48 | OEM-C-3V / NEXUSS3-C-15 | 0.5 | Fuel temperature |
| W49 | OEM-C-3H / NEXUSS3-C-16 | 0.5 | OMP position sensor |
| W50 | OEM-D-4Q / NEXUSS3-C-5 | 0.5 | Vehicle speed sensor |
| W51 | OEM-D-4AA / NEXUSS3-C-6 | 0.5 | Brake pedal switch |
| W52 | OEM-D-4C / NEXUSS3-C-7 | 0.5 | Start signal (STA) |
| W53 | OEM-D-4S / NEXUSS3-C-8 | 0.5 | Clutch switch |
| W54 | OEM-D-4V / NEXUSS3-C-19 | 0.5 | A/C request |
| W55 | OEM-D-4W / NEXUSS3-C-20 | 0.5 | Power steering pressure switch |
| W56 | NEW-KEYON-1 / NEXUSS3-A-13 | 0.5 | Ignition switch input |
Bill of materials
No parts in this harness.