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 |
|---|---|---|---|
| MICROSQUIRT-A | connector | ||
| OEM-A | connector | ||
| SP-0V | splice | ||
| SP-14V | splice | ||
| SP-GND | splice |
Create part
Cut list
Lengths need a layout (0 of 25 routed).
| Wire | From / To | Gauge | Signal |
|---|---|---|---|
| W1 | OEM-A-14 / SP-14V-1 | 0.85 | ECU power (control-unit relay) |
| W2 | SP-14V-1 / MICROSQUIRT-A-1 | 0.85 | +12V In |
| W3 | OEM-A-13 / SP-GND-1 | 0.85 | Ground |
| W4 | OEM-A-19 / SP-GND-1 | 0.85 | Ground |
| W5 | SP-GND-1 / MICROSQUIRT-A-22 | 0.85 | POWER GROUND |
| W6 | SP-GND-1 / MICROSQUIRT-A-23 | 0.85 | POWER GROUND |
| W7 | OEM-A-5 / SP-0V-1 | 0.5 | Knock sensor return |
| W8 | OEM-A-6 / SP-0V-1 | 0.5 | Sensor ground (CTS/Hall/AFM/throttle) |
| W9 | SP-0V-1 / MICROSQUIRT-A-18 | 0.5 | Sensor Ground |
| W10 | SP-0V-1 / MICROSQUIRT-A-19 | 0.5 | Serial Ground |
| W11 | SP-0V-1 / MICROSQUIRT-A-20 | 0.5 | Sensor Ground |
| W12 | OEM-A-17 / MICROSQUIRT-A-28 | 0.5 | AFM potentiometer supply |
| W13 | OEM-A-18 / MICROSQUIRT-A-4 | 0.5 | Hall sender signal (engine speed) |
| W14 | OEM-A-25 / MICROSQUIRT-A-11 | 0.5 | Ignition timing signal to TCI |
| W15 | OEM-A-12 / MICROSQUIRT-A-9 | 0.5 | Injector driver (batch, all 4) |
| W16 | OEM-A-3 / MICROSQUIRT-A-8 | 0.5 | Fuel pump relay control |
| W17 | OEM-A-21 / MICROSQUIRT-A-5 | 0.5 | AFM signal |
| W18 | OEM-A-10 / MICROSQUIRT-A-25 | 0.5 | Coolant temperature sensor |
| W19 | OEM-A-22 / MICROSQUIRT-A-7 | 0.5 | Idle stabilizer valve coil 1 |
| W20 | OEM-A-23 / MICROSQUIRT-A-16 | 0.5 | Idle stabilizer valve coil 2 |
| W21 | OEM-A-2 / MICROSQUIRT-A-34 | 0.5 | Oxygen (lambda) sensor signal |
| W22 | OEM-A-9 / MICROSQUIRT-A-26 | 0.5 | Intake air temperature sensor |
| W23 | OEM-A-1 / MICROSQUIRT-A-30 | 0.5 | Starter signal (term 50) |
| W24 | OEM-A-11 / MICROSQUIRT-A-31 | 0.5 | Idle/WOT throttle switch |
| W25 | OEM-A-16 / MICROSQUIRT-A-6 | 0.5 | A/C compressor signal |
Bill of materials
No parts in this harness.