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 |
|---|---|---|---|
| M170-A | connector | ||
| MAIN-R | connector | ||
| NEW-BATT | terminal | ||
| NEW-KEYON | terminal | ||
| OEM-A | connector | ||
| OEM-B | connector | ||
| OEM-C | connector | ||
| OEM-D | connector | ||
| RLY1-R | connector | ||
| SP-0V | splice | ||
| SP-14V | splice | ||
| SP-GND | splice |
Create part
Cut list
Lengths need a layout (0 of 63 routed).
| Wire | From / To | Gauge | Signal |
|---|---|---|---|
| W1 | OEM-B-1 / SP-14V-1 | 0.85 | Power source 1 (main relay) |
| W2 | OEM-B-9 / SP-14V-1 | 0.85 | Power source 2 (main relay) |
| 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 / M170-A-23 | 0.85 | Relay contact output (switched +12V bus) |
| W7 | MAIN-R-OUT / M170-A-32 | 0.85 | Relay contact output (switched +12V bus) |
| W8 | MAIN-R-OUT / M170-A-41 | 0.85 | Relay contact output (switched +12V bus) |
| W9 | OEM-B-21 / M170-A-54 | 0.85 | Backup power (battery constant) |
| W10 | OEM-B-10 / SP-GND-1 | 0.85 | Power ground 2 |
| W11 | OEM-B-2 / SP-GND-1 | 0.85 | Power ground 1 |
| W12 | OEM-B-20 / SP-GND-1 | 0.85 | Ground |
| W13 | OEM-B-22 / SP-GND-1 | 0.85 | Ground |
| W14 | SP-GND-1 / M170-A-14 | 0.85 | Battery Negative 1 |
| W15 | SP-GND-1 / M170-A-15 | 0.85 | Battery Negative 2 |
| W16 | SP-GND-1 / M170-A-19 | 0.85 | Battery Negative 3 |
| W17 | SP-GND-1 / M170-A-20 | 0.85 | Battery Negative 4 |
| W18 | SP-GND-1 / M170-A-21 | 0.85 | Battery Negative 5 |
| W19 | OEM-C-18 / SP-0V-1 | 0.5 | Sensor ground 2 |
| W20 | OEM-C-7 / SP-0V-1 | 0.5 | Sensor ground 1 |
| W21 | SP-0V-1 / M170-A-11 | 0.5 | Sensor 0V A |
| W22 | SP-0V-1 / M170-A-27 | 0.5 | Sensor 0V B |
| W23 | OEM-C-19 / M170-A-16 | 0.5 | Sensor 5V supply 1 (MAP) |
| W24 | OEM-C-28 / M170-A-34 | 0.5 | Sensor 5V supply 2 |
| W25 | OEM-C-8 / M170-A-49 | 0.5 | Crank sensor + (CKP+) |
| W26 | OEM-C-9 / SP-0V-1 | 0.5 | Crank sensor − (CKP−) |
| W27 | OEM-C-20 / M170-A-56 | 0.5 | Cam (TDC1) sensor + |
| W28 | OEM-C-21 / SP-0V-1 | 0.5 | Cam (TDC1) sensor − |
| W29 | OEM-C-29 / M170-A-46 | 0.5 | Cam (TDC2) sensor + |
| W30 | OEM-C-30 / SP-0V-1 | 0.5 | Cam (TDC2) sensor − |
| W31 | OEM-C-22 / M170-A-29 | 0.5 | Knock sensor |
| W32 | OEM-C-4 / M170-A-1 | 0.5 | Ignition coil 1 |
| W33 | OEM-C-12 / M170-A-5 | 0.5 | Ignition coil 2 |
| W34 | OEM-C-13 / M170-A-4 | 0.5 | Ignition coil 3 |
| W35 | OEM-C-14 / M170-A-10 | 0.5 | Ignition coil 4 |
| W36 | OEM-B-11 / M170-A-33 | 0.5 | Injector 1 |
| W37 | OEM-B-3 / M170-A-43 | 0.5 | Injector 2 |
| W38 | OEM-B-4 / M170-A-50 | 0.5 | Injector 3 |
| W39 | OEM-B-5 / M170-A-51 | 0.5 | Injector 4 |
| W40 | OEM-A-15 / M170-A-63 | 0.5 | Fuel pump relay (USDM) |
| W41 | OEM-B-12 / RLY1-R-OUT | 0.5 | VTEC solenoid |
| W42 | SP-14V-1 / RLY1-R-IN | 0.5 | Relay contact input (switched +12 V) |
| W43 | SP-14V-1 / RLY1-R-COIL+ | 0.5 | Relay coil positive (switched +12 V) |
| W44 | RLY1-R-COIL- / M170-A-66 | 0.5 | Relay coil negative (ECU low-side driver) |
| W45 | OEM-C-17 / M170-A-26 | 0.5 | MAP sensor |
| W46 | OEM-C-27 / M170-A-18 | 0.5 | Throttle position sensor |
| W47 | OEM-C-26 / M170-A-28 | 0.5 | Coolant temp sensor |
| W48 | OEM-A-16 / M170-A-24 | 0.5 | Fuel pump relay (JDM) |
| W49 | OEM-A-17 / M170-A-42 | 0.5 | A/C clutch relay |
| W50 | OEM-A-20 / M170-A-57 | 0.5 | Radiator fan relay |
| W51 | OEM-A-28 / M170-A-62 | 0.5 | Air pump relay |
| W52 | OEM-A-23 / M170-A-6 | 0.5 | Secondary O2 sensor |
| W53 | OEM-C-15 / M170-A-7 | 0.5 | Secondary O2 sensor |
| W54 | OEM-C-16 / M170-A-12 | 0.5 | Primary O2 sensor |
| W55 | OEM-C-25 / M170-A-38 | 0.5 | Intake air temp sensor |
| W56 | OEM-A-29 / M170-A-36 | 0.5 | Fuel tank pressure sensor |
| W57 | OEM-A-30 / M170-A-35 | 0.5 | Electrical load detector |
| W58 | OEM-C-24 / M170-A-44 | 0.5 | Air pump electric current sensor |
| W59 | OEM-A-9 / M170-A-45 | 0.5 | Vehicle speed sensor |
| W60 | OEM-A-24 / M170-A-52 | 0.5 | Starter switch signal |
| W61 | OEM-A-26 / M170-A-53 | 0.5 | Power steering load detect |
| W62 | OEM-A-27 / M170-A-13 | 0.5 | A/C switch (request) |
| W63 | OEM-A-32 / M170-A-22 | 0.5 | Brake switch |
Bill of materials
No wire parts assigned: 63 wires need a wire part.
| Part number | Manufacturer | Description | Qty | Unit | Unit price | Buy |
|---|---|---|---|---|---|---|
| connector4 lines | ||||||
| 179679-6 | TE | S2000 2000–05 ECU harness plug B (25P, TE 040 Multi-Lock) | 1 | ea | TE Connectivity | |
| 179680-5 | TE | S2000 2000–05 ECU harness plug C (31P, TE 040 Multi-Lock) | 1 | ea | TE Connectivity | |
| 179681-6 | TE | S2000 2000–05 ECU harness plug A (32P, TE 040 Multi-Lock) | 1 | ea | TE Connectivity | |
| S2K-0005-ECU-D | Honda | S2000 2000–05 ECU plug D (P/N unknown) | 1 | ea | Mouser ↗Digi-Key ↗Amazon ↗ | |