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 |
|---|---|---|---|
| MS3PROEVOHC-A | connector | ||
| MS3PROEVOHC-B | connector | ||
| MS3PROEVOHC-C | connector | ||
| OEM-T121 | connector | ||
| SP-0V | splice | ||
| SP-14V | splice | ||
| SP-5V1 | splice | ||
| SP-5V2 | splice | ||
| SP-GND | splice |
Create part
Cut list
Lengths need a layout (0 of 71 routed).
| Wire | From / To | Gauge | Signal |
|---|---|---|---|
| W1 | OEM-T121-121 / SP-14V-1 | 0.85 | ECM + coil power (J271 relay feed) |
| W2 | OEM-T121-21 / SP-14V-1 | 0.85 | ECM power (J271 relay feed) |
| W3 | SP-14V-1 / MS3PROEVOHC-A-35 | 0.85 | 12V+ switched power in |
| W4 | OEM-T121-1 / SP-GND-1 | 0.85 | ECU ground |
| W5 | OEM-T121-2 / SP-GND-1 | 0.85 | ECU ground |
| W6 | SP-GND-1 / MS3PROEVOHC-B-3 | 0.85 | Ground |
| W7 | SP-GND-1 / MS3PROEVOHC-B-5 | 0.85 | Ground |
| W8 | SP-GND-1 / MS3PROEVOHC-B-7 | 0.85 | Ground |
| W9 | SP-GND-1 / MS3PROEVOHC-B-9 | 0.85 | Ground |
| W10 | OEM-T121-108 / SP-0V-1 | 0.5 | Sensor ground |
| W11 | OEM-T121-29 / SP-0V-1 | 0.5 | MAF sensor ground (G70) |
| W12 | OEM-T121-34 / SP-0V-1 | 0.5 | Accelerator pedal position 1 ground (G79) |
| W13 | OEM-T121-36 / SP-0V-1 | 0.5 | Accelerator pedal position 2 ground (G185) |
| W14 | OEM-T121-90 / SP-0V-1 | 0.5 | Crank position sensor ground (G28) |
| W15 | OEM-T121-91 / SP-0V-1 | 0.5 | Throttle position sensor ground (G187/G188) |
| W16 | SP-0V-1 / MS3PROEVOHC-A-13 | 0.5 | Logic Ground |
| W17 | SP-0V-1 / MS3PROEVOHC-A-18 | 0.5 | Sensor return |
| W18 | SP-0V-1 / MS3PROEVOHC-C-17 | 0.5 | Sensor return |
| W19 | SP-0V-1 / MS3PROEVOHC-C-18 | 0.5 | Sensor return |
| W20 | SP-0V-1 / MS3PROEVOHC-C-19 | 0.5 | Sensor return |
| W21 | SP-0V-1 / MS3PROEVOHC-C-20 | 0.5 | Sensor return |
| W22 | SP-0V-1 / MS3PROEVOHC-C-21 | 0.5 | Sensor return |
| W23 | OEM-T121-72 / SP-5V1-1 | 0.5 | Accelerator pedal position 1 5V supply (G79) |
| W24 | OEM-T121-98 / SP-5V1-1 | 0.5 | Cam + boost sensor 5V supply (G40/G31) |
| W25 | SP-5V1-1 / MS3PROEVOHC-A-8 | 0.5 | 5V+ VREF out |
| W26 | OEM-T121-73 / SP-5V2-1 | 0.5 | Accelerator pedal position 2 5V supply (G185) |
| W27 | OEM-T121-99 / SP-5V2-1 | 0.5 | Knock sensor 5V supply (G61/G66) |
| W28 | SP-5V2-1 / MS3PROEVOHC-C-15 | 0.5 | 5V+ VREF out 2 |
| W29 | OEM-T121-83 / MS3PROEVOHC-C-22 | 0.5 | Throttle position sensor 5V supply (G187/G188) |
| W30 | OEM-T121-82 / MS3PROEVOHC-A-6 | 0.5 | Crank position sensor (G28) |
| W31 | SP-0V-1 / MS3PROEVOHC-A-15 | 0.5 | CKP− |
| W32 | OEM-T121-86 / MS3PROEVOHC-A-26 | 0.5 | Camshaft position sensor (G40) |
| W33 | SP-0V-1 / MS3PROEVOHC-A-27 | 0.5 | CMP− |
| W34 | OEM-T121-106 / MS3PROEVOHC-A-31 | 0.5 | Knock sensor 1 (G61) |
| W35 | OEM-T121-107 / MS3PROEVOHC-A-7 | 0.5 | Knock sensor 2 (G66) |
| W36 | OEM-T121-102 / MS3PROEVOHC-B-13 | 0.5 | Ignition coil 1 (N127) |
| W37 | OEM-T121-95 / MS3PROEVOHC-B-14 | 0.5 | Ignition coil 2 (N128) |
| W38 | OEM-T121-103 / MS3PROEVOHC-B-15 | 0.5 | Ignition coil 3 (N158) |
| W39 | OEM-T121-94 / MS3PROEVOHC-B-16 | 0.5 | Ignition coil 4 (N163) |
| W40 | OEM-T121-96 / MS3PROEVOHC-A-3 | 0.5 | Injector 1 (N30) |
| W41 | OEM-T121-89 / MS3PROEVOHC-A-4 | 0.5 | Injector 2 (N31) |
| W42 | OEM-T121-97 / MS3PROEVOHC-B-1 | 0.5 | Injector 3 (N32) |
| W43 | OEM-T121-88 / MS3PROEVOHC-B-10 | 0.5 | Injector 4 (N33) |
| W44 | OEM-T121-118 / MS3PROEVOHC-B-31 | 0.5 | Throttle motor G186 (−) |
| W45 | OEM-T121-117 / MS3PROEVOHC-B-30 | 0.5 | Throttle motor G186 (+) |
| W46 | OEM-T121-3 / MS3PROEVOHC-B-19 | 0.5 | Ignition switch +12V (term 15) |
| W47 | OEM-T121-53 / MS3PROEVOHC-A-19 | 0.5 | MAF sensor signal (G70) |
| W48 | OEM-T121-101 / MS3PROEVOHC-A-20 | 0.5 | Boost pressure sensor (G31) |
| W49 | OEM-T121-33 / MS3PROEVOHC-A-9 | 0.5 | Accelerator pedal position 1 (G79) |
| W50 | OEM-T121-84 / MS3PROEVOHC-A-21 | 0.5 | Throttle position sensor 1 (G187) |
| W51 | OEM-T121-35 / MS3PROEVOHC-A-22 | 0.5 | Accelerator pedal position 2 (G185) |
| W52 | OEM-T121-92 / MS3PROEVOHC-A-23 | 0.5 | Throttle position sensor 2 (G188) |
| W53 | OEM-T121-93 / MS3PROEVOHC-A-11 | 0.5 | Engine coolant temperature (G62) |
| W54 | OEM-T121-65 / MS3PROEVOHC-A-28 | 0.5 | Fuel pump relay control |
| W55 | OEM-T121-66 / MS3PROEVOHC-A-14 | 0.5 | Secondary-air pump relay (J299) |
| W56 | OEM-T121-5 / MS3PROEVOHC-C-4 | 0.5 | Wideband lambda heater (Z19) |
| W57 | OEM-T121-63 / MS3PROEVOHC-A-29 | 0.5 | Post-cat lambda heater (Z29) |
| W58 | OEM-T121-104 / MS3PROEVOHC-C-3 | 0.5 | Boost control solenoid (N75) |
| W59 | OEM-T121-105 / MS3PROEVOHC-A-30 | 0.5 | Diverter valve (N249) |
| W60 | OEM-T121-115 / MS3PROEVOHC-C-2 | 0.5 | VVT camshaft adjustment valve (N205) |
| W61 | OEM-T121-47 / MS3PROEVOHC-C-1 | 0.5 | Check engine light (MIL) |
| W62 | OEM-T121-48 / MS3PROEVOHC-A-1 | 0.5 | EPC warning light |
| W63 | OEM-T121-64 / MS3PROEVOHC-A-2 | 0.5 | EVAP canister valve (N80) |
| W64 | OEM-T121-9 / MS3PROEVOHC-A-5 | 0.5 | Secondary-air injection valve (N112) |
| W65 | OEM-T121-37 / MS3PROEVOHC-A-24 | 0.5 | Engine speed signal (tacho to cluster) |
| W66 | OEM-T121-68 / MS3PROEVOHC-A-25 | 0.5 | Post-cat lambda signal (G130) |
| W67 | OEM-T121-69 / MS3PROEVOHC-A-12 | 0.5 | Post-cat lambda signal (G130) |
| W68 | OEM-T121-85 / MS3PROEVOHC-A-10 | 0.5 | Intake air temperature (G42) |
| W69 | OEM-T121-54 / MS3PROEVOHC-B-28 | 0.5 | Road speed signal (VSS) |
| W70 | OEM-T121-60 / MS3PROEVOHC-A-34 | 0.5 | CAN bus high |
| W71 | OEM-T121-58 / MS3PROEVOHC-A-33 | 0.5 | CAN bus low |
Bill of materials
No parts in this harness.