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 |
|---|---|---|---|
| OEM-T121 | connector | ||
| SP-0V | splice | ||
| SP-5V1 | splice | ||
| SP-5V2 | splice | ||
| SP-GND | splice | ||
| SPEEDUINO-A | connector |
Create part
Cut list
Lengths need a layout (0 of 44 routed).
| Wire | From / To | Gauge | Signal |
|---|---|---|---|
| W1 | OEM-T121-1 / SP-GND-1 | 0.85 | ECU ground |
| W2 | OEM-T121-2 / SP-GND-1 | 0.85 | ECU ground |
| W3 | SP-GND-1 / SPEEDUINO-A-10 | 0.85 | Ground |
| W4 | SP-GND-1 / SPEEDUINO-A-9 | 0.85 | Ground |
| W5 | OEM-T121-108 / SP-0V-1 | 0.5 | Sensor ground |
| W6 | OEM-T121-29 / SP-0V-1 | 0.5 | MAF sensor ground (G70) |
| W7 | OEM-T121-34 / SP-0V-1 | 0.5 | Accelerator pedal position 1 ground (G79) |
| W8 | OEM-T121-36 / SP-0V-1 | 0.5 | Accelerator pedal position 2 ground (G185) |
| W9 | OEM-T121-90 / SP-0V-1 | 0.5 | Crank position sensor ground (G28) |
| W10 | OEM-T121-91 / SP-0V-1 | 0.5 | Throttle position sensor ground (G187/G188) |
| W11 | SP-0V-1 / SPEEDUINO-A-12 | 0.5 | Ground |
| W12 | SP-0V-1 / SPEEDUINO-A-23 | 0.5 | Ground |
| W13 | OEM-T121-72 / SP-5V1-1 | 0.5 | Accelerator pedal position 1 5V supply (G79) |
| W14 | OEM-T121-83 / SP-5V1-1 | 0.5 | Throttle position sensor 5V supply (G187/G188) |
| W15 | OEM-T121-99 / SP-5V1-1 | 0.5 | Knock sensor 5V supply (G61/G66) |
| W16 | SP-5V1-1 / SPEEDUINO-A-13 | 0.5 | 5V |
| W17 | OEM-T121-73 / SP-5V2-1 | 0.5 | Accelerator pedal position 2 5V supply (G185) |
| W18 | OEM-T121-98 / SP-5V2-1 | 0.5 | Cam + boost sensor 5V supply (G40/G31) |
| W19 | SP-5V2-1 / SPEEDUINO-A-28 | 0.5 | 5V |
| W20 | OEM-T121-82 / SPEEDUINO-A-25 | 0.5 | Crank position sensor (G28) |
| W21 | OEM-T121-86 / SPEEDUINO-A-24 | 0.5 | Camshaft position sensor (G40) |
| W22 | OEM-T121-102 / SPEEDUINO-A-7 | 0.5 | Ignition coil 1 (N127) |
| W23 | OEM-T121-95 / SPEEDUINO-A-34 | 0.5 | Ignition coil 2 (N128) |
| W24 | OEM-T121-103 / SPEEDUINO-A-33 | 0.5 | Ignition coil 3 (N158) |
| W25 | OEM-T121-94 / SPEEDUINO-A-8 | 0.5 | Ignition coil 4 (N163) |
| W26 | OEM-T121-96 / SPEEDUINO-A-1 | 0.5 | Injector 1 (N30) |
| W27 | OEM-T121-89 / SPEEDUINO-A-2 | 0.5 | Injector 2 (N31) |
| W28 | OEM-T121-97 / SPEEDUINO-A-3 | 0.5 | Injector 3 (N32) |
| W29 | OEM-T121-88 / SPEEDUINO-A-5 | 0.5 | Injector 4 (N33) |
| W30 | OEM-T121-118 / SPEEDUINO-A-32 | 0.5 | Throttle motor G186 (−) |
| W31 | OEM-T121-117 / SPEEDUINO-A-31 | 0.5 | Throttle motor G186 (+) |
| W32 | OEM-T121-101 / SPEEDUINO-A-11 | 0.5 | Boost pressure sensor (G31) |
| W33 | OEM-T121-33 / SPEEDUINO-A-22 | 0.5 | Accelerator pedal position 1 (G79) |
| W34 | OEM-T121-93 / SPEEDUINO-A-19 | 0.5 | Engine coolant temperature (G62) |
| W35 | OEM-T121-65 / SPEEDUINO-A-16 | 0.5 | Fuel pump relay control |
| W36 | OEM-T121-66 / SPEEDUINO-A-15 | 0.5 | Secondary-air pump relay (J299) |
| W37 | OEM-T121-5 / SPEEDUINO-A-36 | 0.5 | Wideband lambda heater (Z19) |
| W38 | OEM-T121-63 / SPEEDUINO-A-35 | 0.5 | Post-cat lambda heater (Z29) |
| W39 | OEM-T121-104 / SPEEDUINO-A-37 | 0.5 | Boost control solenoid (N75) |
| W40 | OEM-T121-105 / SPEEDUINO-A-38 | 0.5 | Diverter valve (N249) |
| W41 | OEM-T121-37 / SPEEDUINO-A-17 | 0.5 | Engine speed signal (tacho to cluster) |
| W42 | OEM-T121-68 / SPEEDUINO-A-21 | 0.5 | Post-cat lambda signal (G130) |
| W43 | OEM-T121-85 / SPEEDUINO-A-20 | 0.5 | Intake air temperature (G42) |
| W44 | OEM-T121-54 / SPEEDUINO-A-14 | 0.5 | Road speed signal (VSS) |
Bill of materials
No parts in this harness.