Honda NSX NA2 1997-2005 (C32B) → Haltech Nexus S3 HT-213000 (auto)
Honda NSX NA2 1997-2005 (C32B) — Haltech — Nexus S3
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-12
Before you start
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.
| Status | draft · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | 5: read the Findings page before cutting any wire |
| Size of the job | 73 wires · 12 connectors · 0 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Order of work | 1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up. |
Build checklist
Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.
| Wire | From | To | Gauge | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-A-13 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-C-1 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-G-10 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-G-2 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-G-3 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-G-9 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-14V-1 | NEXUSS3-A-18 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-14V-1 | NEXUSS3-A-25 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-A-12 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-A-25 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-G-7 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-G-8 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-GND-1 | NEXUSS3-A-10 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-GND-1 | NEXUSS3-A-11 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-A-26 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-B-13 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-B-14 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-B-15 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-B-16 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-B-9 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-D-11 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-F-15 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-F-2 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | SP-0V-1 | NEXUSS3-C-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-D-10 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-F-1 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-F-14 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | SP-5V1-1 | NEXUSS3-C-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-B-8 | NEXUSS3-C-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | SP-0V-1 | NEXUSS3-C-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-B-7 | NEXUSS3-C-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-B-6 | NEXUSS3-C-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | SP-0V-1 | NEXUSS3-C-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-B-5 | NEXUSS3-C-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-D-13 | NEXUSS3-C-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-D-2 | NEXUSS3-C-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-A-11 | NEXUSS3-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-A-24 | NEXUSS3-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-B-12 | NEXUSS3-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-B-11 | NEXUSS3-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-B-10 | NEXUSS3-A-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-B-2 | NEXUSS3-A-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A-1 | NEXUSS3-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A-2 | NEXUSS3-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A-3 | NEXUSS3-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-A-14 | NEXUSS3-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-A-15 | NEXUSS3-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-A-16 | NEXUSS3-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-A-5 | NEXUSS3-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-F-19 | NEXUSS3-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-F-20 | NEXUSS3-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-D-9 | NEXUSS3-C-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-F-13 | NEXUSS3-C-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-F-12 | NEXUSS3-C-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-D-12 | NEXUSS3-C-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-D-7 | NEXUSS3-C-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-F-4 | NEXUSS3-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-A-8 | NEXUSS3-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-A-10 | NEXUSS3-C-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-A-22 | NEXUSS3-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-A-23 | NEXUSS3-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-A-9 | NEXUSS3-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W63 | OEM-A-17 | NEXUSS3-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W64 | OEM-D-16 | NEXUSS3-C-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W65 | OEM-D-17 | NEXUSS3-C-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W66 | OEM-D-18 | NEXUSS3-C-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W67 | OEM-D-19 | NEXUSS3-C-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W68 | OEM-D-8 | NEXUSS3-C-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W69 | OEM-D-20 | NEXUSS3-C-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W70 | OEM-C-7 | NEXUSS3-C-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W71 | OEM-F-16 | NEXUSS3-C-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W72 | OEM-F-6 | NEXUSS3-C-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W73 | OEM-B-1 | NEXUSS3-C-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ |
Bench test (before first power-up)
Battery disconnected, ECU and every sensor unplugged. Meter on resistance. Each pair below must read open (OL): a reading means a pinched wire, a stray strand or a mis-pinned cavity. Then check continuity of every wire (last column of the build checklist).
| # | Probe A | Probe B | Expect | Why | Reading |
|---|---|---|---|---|---|
| 1 | NEXUSS3-A-18 | NEXUSS3-C-2 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | NEXUSS3-A-10 | NEXUSS3-A-18 | open (OL) | power ground must not touch +12 V supply | |
| 3 | NEXUSS3-A-10 | NEXUSS3-C-25 | open (OL) | power ground must not touch 5 V sensor reference | |
| 4 | NEXUSS3-A-18 | NEXUSS3-C-25 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 5 | NEXUSS3-C-2 | NEXUSS3-C-25 | open (OL) | sensor ground must not touch 5 V sensor reference |
If any reading doesn't match, stop and get help before powering up.
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
NEXUSS3-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 1 | — | W43 | — | 0.5 | OEM-A-1 | — | — | — |
| 10 | Battery ground | — | W13 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | Battery ground | — | W14 | — | 0.85 | SP-GND-1 | — | — | — |
| 12 | DPO 2 | — | W51 | — | 0.5 | OEM-F-20 | — | — | — |
| 13 | Ignition switch input | — | — | — | — | — | — | — | — |
| 14 | DPO 3 | — | W57 | — | 0.5 | OEM-F-4 | — | — | — |
| 15 | DPO 4 | — | W58 | — | 0.5 | OEM-A-8 | — | — | — |
| 16 | DPO 5 | — | W60 | — | 0.5 | OEM-A-22 | — | — | — |
| 17 | DPO 6 | — | W61 | — | 0.5 | OEM-A-23 | — | — | — |
| 18 | +12V switched input | — | W7 | — | 0.85 | SP-14V-1 | — | — | — |
| 19 | HBO 1 | — | — | — | — | — | — | — | — |
| 2 | Injector 2 | — | W44 | — | 0.5 | OEM-A-2 | — | — | — |
| 20 | HBO 2 | — | — | — | — | — | — | — | — |
| 21 | HBO 3 | — | — | — | — | — | — | — | — |
| 22 | HBO 4 | — | — | — | — | — | — | — | — |
| 23 | CAN 1 High | — | — | — | — | — | — | — | — |
| 24 | CAN 1 Low | — | — | — | — | — | — | — | — |
| 25 | +12V switched input | — | W8 | — | 0.85 | SP-14V-1 | — | — | — |
| 26 | ECR output | — | W49 | — | 0.5 | OEM-A-5 | — | — | — |
| 27 | Ignition 1 | — | W37 | — | 0.5 | OEM-A-11 | — | — | — |
| 28 | Ignition 2 | — | W38 | — | 0.5 | OEM-A-24 | — | — | — |
| 29 | Ignition 3 | — | W39 | — | 0.5 | OEM-B-12 | — | — | — |
| 3 | Injector 3 | — | W45 | — | 0.5 | OEM-A-3 | — | — | — |
| 30 | Ignition 4 | — | W40 | — | 0.5 | OEM-B-11 | — | — | — |
| 31 | Ignition 5 | — | W41 | — | 0.5 | OEM-B-10 | — | — | — |
| 32 | Ignition 6 | — | W42 | — | 0.5 | OEM-B-2 | — | — | — |
| 33 | Ignition 7 | — | — | — | — | — | — | — | — |
| 34 | Ignition 8 | — | — | — | — | — | — | — | — |
| 4 | Injector 4 | — | W46 | — | 0.5 | OEM-A-14 | — | — | — |
| 5 | Injector 5 | — | W47 | — | 0.5 | OEM-A-15 | — | — | — |
| 6 | Injector 6 | — | W48 | — | 0.5 | OEM-A-16 | — | — | — |
| 7 | Injector 7 | — | W62 | — | 0.5 | OEM-A-9 | — | — | — |
| 8 | Injector 8 | — | W63 | — | 0.5 | OEM-A-17 | — | — | — |
| 9 | DPO 1 | — | W50 | — | 0.5 | OEM-F-19 | — | — | — |
NEXUSS3-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Trigger + | — | W29 | — | 0.5 | OEM-B-8 | — | — | — |
| 10 | AVI 1 | — | W52 | — | 0.5 | OEM-D-9 | — | — | — |
| 11 | AVI 2 | — | W53 | — | 0.5 | OEM-F-13 | — | — | — |
| 12 | AVI 3 | — | W54 | — | 0.5 | OEM-F-12 | — | — | — |
| 13 | AVI 4 | — | W55 | — | 0.5 | OEM-D-12 | — | — | — |
| 14 | AVI 5 | — | W56 | — | 0.5 | OEM-D-7 | — | — | — |
| 15 | AVI 6 | — | W64 | — | 0.5 | OEM-D-16 | — | — | — |
| 16 | AVI 7 | — | W65 | — | 0.5 | OEM-D-17 | — | — | — |
| 17 | AVI 8 | — | W66 | — | 0.5 | OEM-D-18 | — | — | — |
| 18 | AVI 9 | — | W67 | — | 0.5 | OEM-D-19 | — | — | — |
| 19 | SPI 5 | — | W72 | — | 0.5 | OEM-F-6 | — | — | — |
| 2 | Trigger - | — | W30 | — | 0.5 | SP-0V-1 | — | — | — |
| 20 | SPI 6 | — | W73 | — | 0.5 | OEM-B-1 | — | — | — |
| 21 | CAN 2 High | — | — | — | — | — | — | — | — |
| 22 | CAN 2 Low | — | — | — | — | — | — | — | — |
| 23 | Knock 1 | — | W35 | — | 0.5 | OEM-D-13 | — | — | — |
| 24 | Knock 2 | — | W36 | — | 0.5 | OEM-D-2 | — | — | — |
| 25 | +5V | — | W28 | — | 0.5 | SP-5V1-1 | — | — | — |
| 26 | Signal ground | — | W24 | — | 0.5 | SP-0V-1 | — | — | — |
| 27 | AVI 10 | — | W68 | — | 0.5 | OEM-D-8 | — | — | — |
| 28 | AVI 11 | — | W69 | — | 0.5 | OEM-D-20 | — | — | — |
| 29 | WBI 1 Heater + | — | — | — | — | — | — | — | — |
| 3 | Home + | — | W32 | — | 0.5 | OEM-B-6 | — | — | — |
| 30 | WBI 1 Input | — | — | — | — | — | — | — | — |
| 31 | WBI 1 Pump | — | — | — | — | — | — | — | — |
| 32 | WBI 1 Nernst | — | — | — | — | — | — | — | — |
| 33 | WBI 1 Heater - | — | W59 | — | 0.5 | OEM-A-10 | — | — | — |
| 34 | WBI 1 Cal | — | — | — | — | — | — | — | — |
| 4 | Home - | — | W33 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | SPI 1 | — | W31 | — | 0.5 | OEM-B-7 | — | — | — |
| 6 | SPI 2 | — | W34 | — | 0.5 | OEM-B-5 | — | — | — |
| 7 | SPI 3 | — | W70 | — | 0.5 | OEM-C-7 | — | — | — |
| 8 | SPI 4 | — | W71 | — | 0.5 | OEM-F-16 | — | — | — |
| 9 | +8V | — | — | — | — | — | — | — | — |
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 1 (INJ1) | — | W43 | — | 0.5 | NEXUSS3-A-1 | — | — | — |
| 10 | Rear secondary O2 heater (RSO2SHTC) | — | W59 | — | 0.5 | NEXUSS3-C-33 | — | — | — |
| 11 | Ignition coil 1 (IGN COIL1) | — | W37 | — | 0.5 | NEXUSS3-A-27 | — | — | — |
| 12 | Power ground (PG1) | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 13 | ECM power source (IGP1) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 14 | Injector 4 (INJ4) | — | W46 | — | 0.5 | NEXUSS3-A-4 | — | — | — |
| 15 | Injector 5 (INJ5) | — | W47 | — | 0.5 | NEXUSS3-A-5 | — | — | — |
| 16 | Injector 6 (INJ6) | — | W48 | — | 0.5 | NEXUSS3-A-6 | — | — | — |
| 17 | EVAP bypass solenoid (2WBS) | — | W63 | — | 0.5 | NEXUSS3-A-8 | — | — | — |
| 2 | Injector 2 (INJ2) | — | W44 | — | 0.5 | NEXUSS3-A-2 | — | — | — |
| 20 | IAB control solenoid (IABCS) | — | — | — | — | — | — | — | — |
| 21 | EVAP purge control solenoid (PCS) | — | — | — | — | — | — | — | — |
| 22 | Front primary O2 heater (FPO2SHTC) | — | W60 | — | 0.5 | NEXUSS3-A-16 | — | — | — |
| 23 | Rear primary O2 heater (RPO2SHTC) | — | W61 | — | 0.5 | NEXUSS3-A-17 | — | — | — |
| 24 | Ignition coil 2 (IGN COIL2) | — | W38 | — | 0.5 | NEXUSS3-A-28 | — | — | — |
| 25 | Power ground (PG2) | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 26 | Logic ground (LG1) | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Injector 3 (INJ3) | — | W45 | — | 0.5 | NEXUSS3-A-3 | — | — | — |
| 4 | EVAP canister vent shut valve (VSV) | — | — | — | — | — | — | — | — |
| 5 | Fuel pump relay (FLR1) | — | W49 | — | 0.5 | NEXUSS3-A-26 | — | — | — |
| 6 | EGR control solenoid (ESOL) | — | — | — | — | — | — | — | — |
| 7 | Malfunction indicator lamp (MIL) | — | — | — | — | — | — | — | — |
| 8 | A/C clutch relay (ACC) | — | W58 | — | 0.5 | NEXUSS3-A-15 | — | — | — |
| 9 | Front secondary O2 heater (FSO2SHTC) | — | W62 | — | 0.5 | NEXUSS3-A-7 | — | — | — |
OEM-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | VTEC pressure switch front (VTP SWF) | — | W73 | — | 0.5 | NEXUSS3-C-20 | — | — | — |
| 10 | Ignition coil 5 (IGN COIL5) | — | W41 | — | 0.5 | NEXUSS3-A-31 | — | — | — |
| 11 | Ignition coil 4 (IGN COIL4) | — | W40 | — | 0.5 | NEXUSS3-A-30 | — | — | — |
| 12 | Ignition coil 3 (IGN COIL3) | — | W39 | — | 0.5 | NEXUSS3-A-29 | — | — | — |
| 13 | Cylinder position sensor 2 return (CYP 2M) | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 14 | Cylinder position sensor 1 return (CYP 1M) | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 15 | Crank position sensor 2 return (CKP 2M) | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Crank position sensor 1 return (CKP 1M) | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | Ignition coil 6 (IGN COIL6) | — | W42 | — | 0.5 | NEXUSS3-A-32 | — | — | — |
| 3 | VTEC pressure switch rear (VTP SWR) | — | — | — | — | — | — | — | — |
| 4 | Neutral switch (NT SW, M/T) | — | — | — | — | — | — | — | — |
| 5 | Cylinder position sensor 2 + (CYP 2P) | — | W34 | — | 0.5 | NEXUSS3-C-6 | — | — | — |
| 6 | Cylinder position sensor 1 + (CYP 1P) | — | W32 | — | 0.5 | NEXUSS3-C-3 | — | — | — |
| 7 | Crank position sensor 2 + (CKP 2P) | — | W31 | — | 0.5 | NEXUSS3-C-5 | — | — | — |
| 8 | Crank position sensor 1 + (CKP 1P) | — | W29 | — | 0.5 | NEXUSS3-C-1 | — | — | — |
| 9 | Logic ground (LG2) | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
OEM-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECM power source (IGP2) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Clutch switch (MTCLS, M/T) | — | — | — | — | — | — | — | — |
| 6 | Starter switch (STS) | — | — | — | — | — | — | — | — |
| 7 | Vehicle speed sensor (VSS) | — | W70 | — | 0.5 | NEXUSS3-C-7 | — | — | — |
| 8 | Engine speed pulse (NEP) | — | — | — | — | — | — | — | — |
OEM-D
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Backup power (VBU) | — | — | — | — | — | — | — | — |
| 10 | Sensor 5V supply (VCC2) | — | W25 | — | 0.5 | SP-5V1-1 | — | — | — |
| 11 | Sensor ground (SG2) | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 12 | Throttle position sensor (TPS) | — | W55 | — | 0.5 | NEXUSS3-C-13 | — | — | — |
| 13 | Knock sensor front (KSF) | — | W35 | — | 0.5 | NEXUSS3-C-23 | — | — | — |
| 16 | Front secondary O2 signal (O2S FS) | — | W64 | — | 0.5 | NEXUSS3-C-15 | — | — | — |
| 17 | Rear secondary O2 signal (O2S RS) | — | W65 | — | 0.5 | NEXUSS3-C-16 | — | — | — |
| 18 | Front primary O2 signal (O2S FP) | — | W66 | — | 0.5 | NEXUSS3-C-17 | — | — | — |
| 19 | Rear primary O2 signal (O2S RP) | — | W67 | — | 0.5 | NEXUSS3-C-18 | — | — | — |
| 2 | Knock sensor rear (KSR) | — | W36 | — | 0.5 | NEXUSS3-C-24 | — | — | — |
| 20 | EGR valve lift sensor (EGRL) | — | W69 | — | 0.5 | NEXUSS3-C-28 | — | — | — |
| 4 | K-line diagnostics | — | — | — | — | — | — | — | — |
| 7 | Engine coolant temperature (ECT) | — | W56 | — | 0.5 | NEXUSS3-C-14 | — | — | — |
| 8 | Intake air temperature (IAT) | — | W68 | — | 0.5 | NEXUSS3-C-27 | — | — | — |
| 9 | MAP sensor | — | W52 | — | 0.5 | NEXUSS3-C-10 | — | — | — |
OEM-F
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Sensor 5V supply (VCC1) | — | W26 | — | 0.5 | SP-5V1-1 | — | — | — |
| 12 | Accelerator pedal position 2 (AP2) | — | W54 | — | 0.5 | NEXUSS3-C-12 | — | — | — |
| 13 | Accelerator pedal position 1 (AP1) | — | W53 | — | 0.5 | NEXUSS3-C-11 | — | — | — |
| 14 | Accelerator pedal 5V supply (VCC3) | — | W27 | — | 0.5 | SP-5V1-1 | — | — | — |
| 15 | Accelerator pedal ground (SG3) | — | W22 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Brake switch 1 (BKSW1) | — | W71 | — | 0.5 | NEXUSS3-C-8 | — | — | — |
| 19 | VTEC solenoid front (VT SOLF) | — | W50 | — | 0.5 | NEXUSS3-A-9 | — | — | — |
| 2 | Sensor ground (SG1) | — | W23 | — | 0.5 | SP-0V-1 | — | — | — |
| 20 | VTEC solenoid rear (VT SOLR) | — | W51 | — | 0.5 | NEXUSS3-A-12 | — | — | — |
| 4 | Fuel pump relay 2 (FLR2) | — | W57 | — | 0.5 | NEXUSS3-A-14 | — | — | — |
| 6 | Brake switch 2 (BKSW2) | — | W72 | — | 0.5 | NEXUSS3-C-19 | — | — | — |
OEM-G
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | Throttle motor common power phases 2&4 (COM2) | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 11 | Throttle motor phase 3 (PM3) | — | — | — | — | — | — | — | — |
| 12 | Throttle motor phase 4 (PM4) | — | — | — | — | — | — | — | — |
| 2 | Throttle motor power source 1 (IGM1) | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 3 | Throttle motor power source 2 (IGM2) | — | W5 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Throttle motor phase 1 (PM1) | — | — | — | — | — | — | — | — |
| 5 | Throttle motor phase 2 (PM2) | — | — | — | — | — | — | — | — |
| 7 | Throttle motor ground 1 (PGM1) | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| 8 | Throttle motor ground 2 (PGM2) | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| 9 | Throttle motor common power phases 1&3 (COM1) | — | W6 | — | 0.85 | SP-14V-1 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W15 | — | 0.5 | OEM-A-26 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-B-13 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | OEM-B-14 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | OEM-B-15 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | OEM-B-16 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | OEM-B-9 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | OEM-D-11 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | OEM-F-15 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | OEM-F-2 | — | — | — |
| 1 | — | — | W24 | — | 0.5 | NEXUSS3-C-26 | — | — | — |
| 1 | — | — | W30 | — | 0.5 | NEXUSS3-C-2 | — | — | — |
| 1 | — | — | W33 | — | 0.5 | NEXUSS3-C-4 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A-13 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-C-1 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | OEM-G-10 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | OEM-G-2 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-G-3 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-G-9 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | NEXUSS3-A-18 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | NEXUSS3-A-25 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W25 | — | 0.5 | OEM-D-10 | — | — | — |
| 1 | — | — | W26 | — | 0.5 | OEM-F-1 | — | — | — |
| 1 | — | — | W27 | — | 0.5 | OEM-F-14 | — | — | — |
| 1 | — | — | W28 | — | 0.5 | NEXUSS3-C-25 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W9 | — | 0.85 | OEM-A-12 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | OEM-A-25 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | OEM-G-7 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | OEM-G-8 | — | — | — |
| 1 | — | — | W13 | — | 0.85 | NEXUSS3-A-10 | — | — | — |
| 1 | — | — | W14 | — | 0.85 | NEXUSS3-A-11 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1 | Injector 1 (INJ1) | injector_out | NEXUSS3-A-1 | Injector 1 | injector_out | single_source | |
| OEM-A-10 | Rear secondary O2 heater (RSO2SHTC) | low_side_out | NEXUSS3-C-33 | WBI 1 Heater - | low_side_out | single_source | |
| OEM-A-11 | Ignition coil 1 (IGN COIL1) | ignition_out | NEXUSS3-A-27 | Ignition 1 | ignition_out | single_source | |
| OEM-A-12 | Power ground (PG1) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-A-13 | ECM power source (IGP1) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source | |
| OEM-A-14 | Injector 4 (INJ4) | injector_out | NEXUSS3-A-4 | Injector 4 | injector_out | single_source | |
| OEM-A-15 | Injector 5 (INJ5) | injector_out | NEXUSS3-A-5 | Injector 5 | injector_out | single_source | |
| OEM-A-16 | Injector 6 (INJ6) | injector_out | NEXUSS3-A-6 | Injector 6 | injector_out | single_source | |
| OEM-A-17 | EVAP bypass solenoid (2WBS) | low_side_out | NEXUSS3-A-8 | Injector 8 | injector_out | single_source | |
| OEM-A-2 | Injector 2 (INJ2) | injector_out | NEXUSS3-A-2 | Injector 2 | injector_out | single_source | |
| OEM-A-20 | IAB control solenoid (IABCS) | low_side_out | — | — | — | single_source | |
| OEM-A-21 | EVAP purge control solenoid (PCS) | low_side_out | — | — | — | single_source | |
| OEM-A-22 | Front primary O2 heater (FPO2SHTC) | low_side_out | NEXUSS3-A-16 | DPO 5 | low_side_out | single_source | |
| OEM-A-23 | Rear primary O2 heater (RPO2SHTC) | low_side_out | NEXUSS3-A-17 | DPO 6 | low_side_out | single_source | |
| OEM-A-24 | Ignition coil 2 (IGN COIL2) | ignition_out | NEXUSS3-A-28 | Ignition 2 | ignition_out | single_source | |
| OEM-A-25 | Power ground (PG2) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-A-26 | Logic ground (LG1) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-A-3 | Injector 3 (INJ3) | injector_out | NEXUSS3-A-3 | Injector 3 | injector_out | single_source | |
| OEM-A-4 | EVAP canister vent shut valve (VSV) | low_side_out | — | — | — | single_source | |
| OEM-A-5 | Fuel pump relay (FLR1) | low_side_out | NEXUSS3-A-26 | ECR output | low_side_out | single_source | |
| OEM-A-6 | EGR control solenoid (ESOL) | low_side_out | — | — | — | single_source | |
| OEM-A-7 | Malfunction indicator lamp (MIL) | low_side_out | — | — | — | single_source | |
| OEM-A-8 | A/C clutch relay (ACC) | low_side_out | NEXUSS3-A-15 | DPO 4 | low_side_out | single_source | |
| OEM-A-9 | Front secondary O2 heater (FSO2SHTC) | low_side_out | NEXUSS3-A-7 | Injector 7 | injector_out | single_source | |
| OEM-B-1 | VTEC pressure switch front (VTP SWF) | digital_in | NEXUSS3-C-20 | SPI 6 | digital_in | single_source | |
| OEM-B-10 | Ignition coil 5 (IGN COIL5) | ignition_out | NEXUSS3-A-31 | Ignition 5 | ignition_out | single_source | |
| OEM-B-11 | Ignition coil 4 (IGN COIL4) | ignition_out | NEXUSS3-A-30 | Ignition 4 | ignition_out | single_source | |
| OEM-B-12 | Ignition coil 3 (IGN COIL3) | ignition_out | NEXUSS3-A-29 | Ignition 3 | ignition_out | single_source | |
| OEM-B-13 | Cylinder position sensor 2 return (CYP 2M) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-B-14 | Cylinder position sensor 1 return (CYP 1M) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-B-15 | Crank position sensor 2 return (CKP 2M) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-B-16 | Crank position sensor 1 return (CKP 1M) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-B-2 | Ignition coil 6 (IGN COIL6) | ignition_out | NEXUSS3-A-32 | Ignition 6 | ignition_out | single_source | |
| OEM-B-3 | VTEC pressure switch rear (VTP SWR) | digital_in | — | — | — | single_source | |
| OEM-B-4 | Neutral switch (NT SW, M/T) | digital_in | — | — | — | single_source | |
| OEM-B-5 | Cylinder position sensor 2 + (CYP 2P) | trigger_in | NEXUSS3-C-6 | SPI 2 | digital_in | single_source | |
| OEM-B-6 | Cylinder position sensor 1 + (CYP 1P) | trigger_in | NEXUSS3-C-3 | Home + | trigger_in | single_source | |
| OEM-B-7 | Crank position sensor 2 + (CKP 2P) | trigger_in | NEXUSS3-C-5 | SPI 1 | digital_in | single_source | |
| OEM-B-8 | Crank position sensor 1 + (CKP 1P) | trigger_in | NEXUSS3-C-1 | Trigger + | trigger_in | single_source | |
| OEM-B-9 | Logic ground (LG2) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-C-1 | ECM power source (IGP2) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source | |
| OEM-C-4 | Clutch switch (MTCLS, M/T) | digital_in | — | — | — | single_source | |
| OEM-C-6 | Starter switch (STS) | digital_in | — | — | — | single_source | |
| OEM-C-7 | Vehicle speed sensor (VSS) | digital_in | NEXUSS3-C-7 | SPI 3 | digital_in | single_source | |
| OEM-C-8 | Engine speed pulse (NEP) | tacho_out | — | — | — | single_source | |
| OEM-D-1 | Backup power (VBU) | power_in | — | — | — | single_source | |
| OEM-D-10 | Sensor 5V supply (VCC2) | vref | NEXUSS3-C-25 | +5V | vref | single_source | |
| OEM-D-11 | Sensor ground (SG2) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-D-12 | Throttle position sensor (TPS) | analog_in | NEXUSS3-C-13 | AVI 4 | analog_in | single_source | |
| OEM-D-13 | Knock sensor front (KSF) | knock_in | NEXUSS3-C-23 | Knock 1 | knock_in | single_source | |
| OEM-D-16 | Front secondary O2 signal (O2S FS) | lambda_nb_in | NEXUSS3-C-15 | AVI 6 | analog_in | single_source | |
| OEM-D-17 | Rear secondary O2 signal (O2S RS) | lambda_nb_in | NEXUSS3-C-16 | AVI 7 | analog_in | single_source | |
| OEM-D-18 | Front primary O2 signal (O2S FP) | lambda_nb_in | NEXUSS3-C-17 | AVI 8 | analog_in | single_source | |
| OEM-D-19 | Rear primary O2 signal (O2S RP) | lambda_nb_in | NEXUSS3-C-18 | AVI 9 | analog_in | single_source | |
| OEM-D-2 | Knock sensor rear (KSR) | knock_in | NEXUSS3-C-24 | Knock 2 | knock_in | single_source | |
| OEM-D-20 | EGR valve lift sensor (EGRL) | analog_in | NEXUSS3-C-28 | AVI 11 | analog_in | single_source | |
| OEM-D-4 | K-line diagnostics | serial | — | — | — | single_source | |
| OEM-D-7 | Engine coolant temperature (ECT) | temp_in | NEXUSS3-C-14 | AVI 5 | analog_in | single_source | |
| OEM-D-8 | Intake air temperature (IAT) | temp_in | NEXUSS3-C-27 | AVI 10 | analog_in | single_source | |
| OEM-D-9 | MAP sensor | analog_in | NEXUSS3-C-10 | AVI 1 | analog_in | single_source | |
| OEM-F-1 | Sensor 5V supply (VCC1) | vref | NEXUSS3-C-25 | +5V | vref | single_source | |
| OEM-F-12 | Accelerator pedal position 2 (AP2) | analog_in | NEXUSS3-C-12 | AVI 3 | analog_in | single_source | |
| OEM-F-13 | Accelerator pedal position 1 (AP1) | analog_in | NEXUSS3-C-11 | AVI 2 | analog_in | single_source | |
| OEM-F-14 | Accelerator pedal 5V supply (VCC3) | vref | NEXUSS3-C-25 | +5V | vref | single_source | |
| OEM-F-15 | Accelerator pedal ground (SG3) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-F-16 | Brake switch 1 (BKSW1) | digital_in | NEXUSS3-C-8 | SPI 4 | digital_in | single_source | |
| OEM-F-19 | VTEC solenoid front (VT SOLF) | low_side_out | NEXUSS3-A-9 | DPO 1 | low_side_out | single_source | |
| OEM-F-2 | Sensor ground (SG1) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-F-20 | VTEC solenoid rear (VT SOLR) | low_side_out | NEXUSS3-A-12 | DPO 2 | low_side_out | single_source | |
| OEM-F-4 | Fuel pump relay 2 (FLR2) | low_side_out | NEXUSS3-A-14 | DPO 3 | low_side_out | single_source | |
| OEM-F-6 | Brake switch 2 (BKSW2) | digital_in | NEXUSS3-C-19 | SPI 5 | digital_in | single_source | |
| OEM-G-10 | Throttle motor common power phases 2&4 (COM2) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source | |
| OEM-G-11 | Throttle motor phase 3 (PM3) | hbridge_out | — | — | — | single_source | |
| OEM-G-12 | Throttle motor phase 4 (PM4) | hbridge_out | — | — | — | single_source | |
| OEM-G-2 | Throttle motor power source 1 (IGM1) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source | |
| OEM-G-3 | Throttle motor power source 2 (IGM2) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source | |
| OEM-G-4 | Throttle motor phase 1 (PM1) | hbridge_out | — | — | — | single_source | |
| OEM-G-5 | Throttle motor phase 2 (PM2) | hbridge_out | — | — | — | single_source | |
| OEM-G-7 | Throttle motor ground 1 (PGM1) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-G-8 | Throttle motor ground 2 (PGM2) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-G-9 | Throttle motor common power phases 1&3 (COM1) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-A-13 | SP-14V-1 | 0.85 | no route | ECM power source (IGP1) | — | |
| W2 | OEM-C-1 | SP-14V-1 | 0.85 | no route | ECM power source (IGP2) | — | |
| W3 | OEM-G-10 | SP-14V-1 | 0.85 | no route | Throttle motor common power phases 2&4 (COM2) | — | |
| W4 | OEM-G-2 | SP-14V-1 | 0.85 | no route | Throttle motor power source 1 (IGM1) | — | |
| W5 | OEM-G-3 | SP-14V-1 | 0.85 | no route | Throttle motor power source 2 (IGM2) | — | |
| W6 | OEM-G-9 | SP-14V-1 | 0.85 | no route | Throttle motor common power phases 1&3 (COM1) | — | |
| W7 | SP-14V-1 | NEXUSS3-A-18 | 0.85 | no route | +12V switched input | — | |
| W8 | SP-14V-1 | NEXUSS3-A-25 | 0.85 | no route | +12V switched input | — | |
| W9 | OEM-A-12 | SP-GND-1 | 0.85 | no route | Power ground (PG1) | — | |
| W10 | OEM-A-25 | SP-GND-1 | 0.85 | no route | Power ground (PG2) | — | |
| W11 | OEM-G-7 | SP-GND-1 | 0.85 | no route | Throttle motor ground 1 (PGM1) | — | |
| W12 | OEM-G-8 | SP-GND-1 | 0.85 | no route | Throttle motor ground 2 (PGM2) | — | |
| W13 | SP-GND-1 | NEXUSS3-A-10 | 0.85 | no route | Battery ground | — | |
| W14 | SP-GND-1 | NEXUSS3-A-11 | 0.85 | no route | Battery ground | — | |
| W15 | OEM-A-26 | SP-0V-1 | 0.5 | no route | Logic ground (LG1) | — | |
| W16 | OEM-B-13 | SP-0V-1 | 0.5 | no route | Cylinder position sensor 2 return (CYP 2M) | — | |
| W17 | OEM-B-14 | SP-0V-1 | 0.5 | no route | Cylinder position sensor 1 return (CYP 1M) | — | |
| W18 | OEM-B-15 | SP-0V-1 | 0.5 | no route | Crank position sensor 2 return (CKP 2M) | — | |
| W19 | OEM-B-16 | SP-0V-1 | 0.5 | no route | Crank position sensor 1 return (CKP 1M) | — | |
| W20 | OEM-B-9 | SP-0V-1 | 0.5 | no route | Logic ground (LG2) | — | |
| W21 | OEM-D-11 | SP-0V-1 | 0.5 | no route | Sensor ground (SG2) | — | |
| W22 | OEM-F-15 | SP-0V-1 | 0.5 | no route | Accelerator pedal ground (SG3) | — | |
| W23 | OEM-F-2 | SP-0V-1 | 0.5 | no route | Sensor ground (SG1) | — | |
| W24 | SP-0V-1 | NEXUSS3-C-26 | 0.5 | no route | Signal ground | — | |
| W25 | OEM-D-10 | SP-5V1-1 | 0.5 | no route | Sensor 5V supply (VCC2) | — | |
| W26 | OEM-F-1 | SP-5V1-1 | 0.5 | no route | Sensor 5V supply (VCC1) | — | |
| W27 | OEM-F-14 | SP-5V1-1 | 0.5 | no route | Accelerator pedal 5V supply (VCC3) | — | |
| W28 | SP-5V1-1 | NEXUSS3-C-25 | 0.5 | no route | +5V | — | |
| W29 | OEM-B-8 | NEXUSS3-C-1 | 0.5 | no route | Crank position sensor 1 + (CKP 1P) | — | |
| W30 | SP-0V-1 | NEXUSS3-C-2 | 0.5 | no route | Trigger - | — | |
| W31 | OEM-B-7 | NEXUSS3-C-5 | 0.5 | no route | Crank position sensor 2 + (CKP 2P) | — | |
| W32 | OEM-B-6 | NEXUSS3-C-3 | 0.5 | no route | Cylinder position sensor 1 + (CYP 1P) | — | |
| W33 | SP-0V-1 | NEXUSS3-C-4 | 0.5 | no route | Home - | — | |
| W34 | OEM-B-5 | NEXUSS3-C-6 | 0.5 | no route | Cylinder position sensor 2 + (CYP 2P) | — | |
| W35 | OEM-D-13 | NEXUSS3-C-23 | 0.5 | no route | Knock sensor front (KSF) | — | |
| W36 | OEM-D-2 | NEXUSS3-C-24 | 0.5 | no route | Knock sensor rear (KSR) | — | |
| W37 | OEM-A-11 | NEXUSS3-A-27 | 0.5 | no route | Ignition coil 1 (IGN COIL1) | — | |
| W38 | OEM-A-24 | NEXUSS3-A-28 | 0.5 | no route | Ignition coil 2 (IGN COIL2) | — | |
| W39 | OEM-B-12 | NEXUSS3-A-29 | 0.5 | no route | Ignition coil 3 (IGN COIL3) | — | |
| W40 | OEM-B-11 | NEXUSS3-A-30 | 0.5 | no route | Ignition coil 4 (IGN COIL4) | — | |
| W41 | OEM-B-10 | NEXUSS3-A-31 | 0.5 | no route | Ignition coil 5 (IGN COIL5) | — | |
| W42 | OEM-B-2 | NEXUSS3-A-32 | 0.5 | no route | Ignition coil 6 (IGN COIL6) | — | |
| W43 | OEM-A-1 | NEXUSS3-A-1 | 0.5 | no route | Injector 1 (INJ1) | — | |
| W44 | OEM-A-2 | NEXUSS3-A-2 | 0.5 | no route | Injector 2 (INJ2) | — | |
| W45 | OEM-A-3 | NEXUSS3-A-3 | 0.5 | no route | Injector 3 (INJ3) | — | |
| W46 | OEM-A-14 | NEXUSS3-A-4 | 0.5 | no route | Injector 4 (INJ4) | — | |
| W47 | OEM-A-15 | NEXUSS3-A-5 | 0.5 | no route | Injector 5 (INJ5) | — | |
| W48 | OEM-A-16 | NEXUSS3-A-6 | 0.5 | no route | Injector 6 (INJ6) | — | |
| W49 | OEM-A-5 | NEXUSS3-A-26 | 0.5 | no route | Fuel pump relay (FLR1) | — | |
| W50 | OEM-F-19 | NEXUSS3-A-9 | 0.5 | no route | VTEC solenoid front (VT SOLF) | — | |
| W51 | OEM-F-20 | NEXUSS3-A-12 | 0.5 | no route | VTEC solenoid rear (VT SOLR) | — | |
| W52 | OEM-D-9 | NEXUSS3-C-10 | 0.5 | no route | MAP sensor | — | |
| W53 | OEM-F-13 | NEXUSS3-C-11 | 0.5 | no route | Accelerator pedal position 1 (AP1) | — | |
| W54 | OEM-F-12 | NEXUSS3-C-12 | 0.5 | no route | Accelerator pedal position 2 (AP2) | — | |
| W55 | OEM-D-12 | NEXUSS3-C-13 | 0.5 | no route | Throttle position sensor (TPS) | — | |
| W56 | OEM-D-7 | NEXUSS3-C-14 | 0.5 | no route | Engine coolant temperature (ECT) | — | |
| W57 | OEM-F-4 | NEXUSS3-A-14 | 0.5 | no route | Fuel pump relay 2 (FLR2) | — | |
| W58 | OEM-A-8 | NEXUSS3-A-15 | 0.5 | no route | A/C clutch relay (ACC) | — | |
| W59 | OEM-A-10 | NEXUSS3-C-33 | 0.5 | no route | Rear secondary O2 heater (RSO2SHTC) | — | |
| W60 | OEM-A-22 | NEXUSS3-A-16 | 0.5 | no route | Front primary O2 heater (FPO2SHTC) | — | |
| W61 | OEM-A-23 | NEXUSS3-A-17 | 0.5 | no route | Rear primary O2 heater (RPO2SHTC) | — | |
| W62 | OEM-A-9 | NEXUSS3-A-7 | 0.5 | no route | Front secondary O2 heater (FSO2SHTC) | — | |
| W63 | OEM-A-17 | NEXUSS3-A-8 | 0.5 | no route | EVAP bypass solenoid (2WBS) | — | |
| W64 | OEM-D-16 | NEXUSS3-C-15 | 0.5 | no route | Front secondary O2 signal (O2S FS) | — | |
| W65 | OEM-D-17 | NEXUSS3-C-16 | 0.5 | no route | Rear secondary O2 signal (O2S RS) | — | |
| W66 | OEM-D-18 | NEXUSS3-C-17 | 0.5 | no route | Front primary O2 signal (O2S FP) | — | |
| W67 | OEM-D-19 | NEXUSS3-C-18 | 0.5 | no route | Rear primary O2 signal (O2S RP) | — | |
| W68 | OEM-D-8 | NEXUSS3-C-27 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W69 | OEM-D-20 | NEXUSS3-C-28 | 0.5 | no route | EGR valve lift sensor (EGRL) | — | |
| W70 | OEM-C-7 | NEXUSS3-C-7 | 0.5 | no route | Vehicle speed sensor (VSS) | — | |
| W71 | OEM-F-16 | NEXUSS3-C-8 | 0.5 | no route | Brake switch 1 (BKSW1) | — | |
| W72 | OEM-F-6 | NEXUSS3-C-19 | 0.5 | no route | Brake switch 2 (BKSW2) | — | |
| W73 | OEM-B-1 | NEXUSS3-C-20 | 0.5 | no route | VTEC pressure switch front (VTP SWF) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (16)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | DBW_SENSOR_INPUT | tps | Only 0 throttle-position track(s) found. An electronic throttle needs two (main and sub) so the ECU can cross-check them. |
| error | REQUIRED_UNMAPPED | OEM-G-11 | Required OEM function "Throttle motor phase 3 (PM3)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-G-12 | Required OEM function "Throttle motor phase 4 (PM4)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-G-4 | Required OEM function "Throttle motor phase 1 (PM1)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-G-5 | Required OEM function "Throttle motor phase 2 (PM2)" (hbridge_out) is not connected to the new ECU. |
| warn | DBW_SHARED_5V | NEXUSS3-C-25 + OEM-D-10 + OEM-F-1 + OEM-F-14 + SP-5V1-1 | These 5 V supplies are separate in the stock car (OEM-D-10 [tps], OEM-F-14 [pedal]) and here share one ECU 5 V (NEXUSS3-C-25). On a drive-by-wire car the OEM splits them so one short or fault can't corrupt both throttle/pedal tracks at once. Nexus S3 has 1 5 V sensor supply pin(s). All are in use, so decide: accept the shared supply (and rely on the ECU's DBW fault checks), or add a separate regulated 5 V for the sub tracks. |
| warn | LOAD_UNKNOWN | NEXUSS3-A-26 | NEXUSS3-A-26 "ECR output" drives OEM-A-5 Fuel pump relay (FLR1) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | NET_FAMILY | OEM-B-5 ↔ NEXUSS3-C-6 | OEM-B-5 "Cylinder position sensor 2 + (CYP 2P)" [trigger_in] is wired to NEXUSS3-C-6 "SPI 2" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| warn | NET_FAMILY | OEM-B-7 ↔ NEXUSS3-C-5 | OEM-B-7 "Crank position sensor 2 + (CKP 2P)" [trigger_in] is wired to NEXUSS3-C-5 "SPI 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| warn | SUPPLY_GROUP | NEXUSS3-C-25 + OEM-D-10 + OEM-F-1 + OEM-F-14 + SP-5V1-1 | Supplies meant to stay independent share one net: OEM-D-10 [tps], OEM-F-14 [pedal]. The new ECU has no free 5 V reference, so they share one: normal on a standalone, but a short on any of these sensors drops them all. |
| info | NET_FAMILY | OEM-A-17 ↔ NEXUSS3-A-8 | OEM-A-17 "EVAP bypass solenoid (2WBS)" [low_side_out] is wired to NEXUSS3-A-8 "Injector 8" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-A-9 ↔ NEXUSS3-A-7 | OEM-A-9 "Front secondary O2 heater (FSO2SHTC)" [low_side_out] is wired to NEXUSS3-A-7 "Injector 7" [injector_out]. Injector drivers can usually run general low-side loads; check current and PWM frequency. |
| info | NET_FAMILY | OEM-D-7 ↔ NEXUSS3-C-14 | OEM-D-7 "Engine coolant temperature (ECT)" [temp_in] is wired to NEXUSS3-C-14 "AVI 5" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-D-8 ↔ NEXUSS3-C-27 | OEM-D-8 "Intake air temperature (IAT)" [temp_in] is wired to NEXUSS3-C-27 "AVI 10" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-F-2 ↔ NEXUSS3-C-4 | OEM-F-2 "Sensor ground (SG1)" [sensor_ground] is wired to NEXUSS3-C-4 "Home -" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | UNMAPPED | OEM | 11 optional OEM pins are not mapped: OEM-A-20 IAB control solenoid (IABCS); OEM-A-21 EVAP purge control solenoid (PCS); OEM-A-4 EVAP canister vent shut valve (VSV); OEM-A-6 EGR control solenoid (ESOL); OEM-A-7 Malfunction indicator lamp (MIL); OEM-B-3 VTEC pressure switch rear (VTP SWR); OEM-B-4 Neutral switch (NT SW, M/T); OEM-C-4 Clutch switch (MTCLS, M/T); OEM-C-6 Starter switch (STS); OEM-C-8 Engine speed pulse (NEP); OEM-D-4 K-line diagnostics |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-D-1 | Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed. | mapping-proposal |
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Open items: - OEM-G 4: Throttle motor phase 1 (PM1): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-G 5: Throttle motor phase 2 (PM2): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-G 11: Throttle motor phase 3 (PM3): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-G 12: Throttle motor phase 4 (PM4): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand Not wired: - OEM-D 1: Backup power (VBU): Haltech Nexus S3 has no battery-constant input; not needed - OEM-A 20: IAB control solenoid (IABCS): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-A 21: EVAP purge control solenoid (PCS): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-A 4: EVAP canister vent shut valve (VSV): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-A 6: EGR control solenoid (ESOL): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-A 7: Malfunction indicator lamp (MIL): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-C 8: Engine speed pulse (NEP): no free tacho/frequency_out/low_side/ls_hs on Haltech Nexus S3 - OEM-B 3: VTEC pressure switch rear (VTP SWR): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B 4: Neutral switch (NT SW, M/T): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-C 4: Clutch switch (MTCLS, M/T): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-C 6: Starter switch (STS): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-D 4: K-line diagnostics: no free k_line on Haltech Nexus S3 - NEXUSS3-A 13: Ignition switch input: not fed (the stock ECU has no ignition-sense pin); feed it from a switched-ignition source
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | 1997-2005 Acura NSX Service Manual §11 (PGM-FI), ECM terminal arrangement | https://www.manualslib.com/manual/1540331/Acura-Nsx-1997.html | — | — | — |
| 4 | vendor_doc | Haltech: Nexus S3 Plug 'n' Play adapter QSG (Subaru WRX/STI ADM, HT-186300) — ECU Connector A & C pinout | https://www.haltech.com/product/ht-186300-nexus-s3-plug-n-play-adapter-harness/ | archive | 2026-10-05 | 3cab7cd337c2 |
| 4 | vendor_doc | Haltech: Nexus S3/S2 ECU Overview (QSG) — specifications | https://store.haltech.com/product/ht-213000-nexus-s3-ecu-only/ | archive | 2026-10-05 | 388299668207 |