Honda NSX NA1 1991-2005 (C30A) → Haltech Nexus S3 HT-213000 (auto)
Honda NSX NA1 1991-2005 (C30A) — Haltech — Nexus S3
Drawn by Michael Gnankou · Rev 0 · proposal · 2026-10-07
Before you start
| Status | proposal · not yet verified: nobody has reported building and running this harness |
|---|---|
| Open errors | none |
| Size of the job | 69 wires · 11 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-25 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-C-1 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | NEXUSS3-A-18 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | NEXUSS3-A-25 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-A-23 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-A-24 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-B-2 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | NEXUSS3-A-10 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | NEXUSS3-A-11 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-A-26 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-B-10 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-B-12 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-B-14 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-B-16 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-D-21 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-D-22 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | NEXUSS3-C-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-D-18 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-D-19 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-D-20 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | SP-5V1-1 | NEXUSS3-C-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-B-15 | NEXUSS3-C-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | SP-0V-1 | NEXUSS3-C-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-B-13 | NEXUSS3-C-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-B-11 | NEXUSS3-C-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | SP-0V-1 | NEXUSS3-C-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-B-9 | NEXUSS3-C-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-D-4 | NEXUSS3-C-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-D-3 | NEXUSS3-C-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-A-21 | NEXUSS3-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-A-22 | NEXUSS3-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-B-8 | NEXUSS3-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-B-6 | NEXUSS3-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-B-4 | NEXUSS3-A-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-B-3 | NEXUSS3-A-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-A-1 | NEXUSS3-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-A-3 | NEXUSS3-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-A-5 | NEXUSS3-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-A-2 | NEXUSS3-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-A-4 | NEXUSS3-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-A-6 | NEXUSS3-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-A-8 | NEXUSS3-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A-15 | NEXUSS3-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A-18 | NEXUSS3-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A-7 | NEXUSS3-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-5-F5 | NEXUSS3-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-5-F7 | NEXUSS3-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-A-10 | NEXUSS3-C-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-A-12 | NEXUSS3-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-A-11 | NEXUSS3-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-A-13 | NEXUSS3-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-A-14 | NEXUSS3-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-A-20 | NEXUSS3-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-A-9 | NEXUSS3-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-D-17 | NEXUSS3-C-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-D-11 | NEXUSS3-C-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-D-14 | NEXUSS3-C-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-D-16 | NEXUSS3-C-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-D-13 | NEXUSS3-C-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-D-15 | NEXUSS3-C-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-D-12 | NEXUSS3-C-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-C-2 | NEXUSS3-C-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W63 | OEM-D-9 | NEXUSS3-C-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W64 | OEM-5-F2 | NEXUSS3-C-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W65 | OEM-5-F4 | NEXUSS3-C-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W66 | OEM-B-7 | NEXUSS3-C-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W67 | OEM-C-11 | NEXUSS3-C-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W68 | OEM-C-3 | NEXUSS3-C-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W69 | OEM-C-5 | NEXUSS3-C-28 | 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 |
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 | — | W36 | — | 0.5 | OEM-A-1 | — | — | — |
| 10 | Battery ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | Battery ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 12 | DPO 2 | — | W44 | — | 0.5 | OEM-A-18 | — | — | — |
| 13 | Ignition switch input | — | — | — | — | — | — | — | — |
| 14 | DPO 3 | — | W45 | — | 0.5 | OEM-A-7 | — | — | — |
| 15 | DPO 4 | — | W49 | — | 0.5 | OEM-A-12 | — | — | — |
| 16 | DPO 5 | — | W50 | — | 0.5 | OEM-A-11 | — | — | — |
| 17 | DPO 6 | — | W51 | — | 0.5 | OEM-A-13 | — | — | — |
| 18 | +12V switched input | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 19 | HBO 1 | — | W46 | — | 0.5 | OEM-5-F5 | — | — | — |
| 2 | Injector 2 | — | W37 | — | 0.5 | OEM-A-3 | — | — | — |
| 20 | HBO 2 | — | W47 | — | 0.5 | OEM-5-F7 | — | — | — |
| 21 | HBO 3 | — | W54 | — | 0.5 | OEM-A-9 | — | — | — |
| 22 | HBO 4 | — | — | — | — | — | — | — | — |
| 23 | CAN 1 High | — | — | — | — | — | — | — | — |
| 24 | CAN 1 Low | — | — | — | — | — | — | — | — |
| 25 | +12V switched input | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 26 | ECR output | — | W42 | — | 0.5 | OEM-A-8 | — | — | — |
| 27 | Ignition 1 | — | W30 | — | 0.5 | OEM-A-21 | — | — | — |
| 28 | Ignition 2 | — | W31 | — | 0.5 | OEM-A-22 | — | — | — |
| 29 | Ignition 3 | — | W32 | — | 0.5 | OEM-B-8 | — | — | — |
| 3 | Injector 3 | — | W38 | — | 0.5 | OEM-A-5 | — | — | — |
| 30 | Ignition 4 | — | W33 | — | 0.5 | OEM-B-6 | — | — | — |
| 31 | Ignition 5 | — | W34 | — | 0.5 | OEM-B-4 | — | — | — |
| 32 | Ignition 6 | — | W35 | — | 0.5 | OEM-B-3 | — | — | — |
| 33 | Ignition 7 | — | — | — | — | — | — | — | — |
| 34 | Ignition 8 | — | — | — | — | — | — | — | — |
| 4 | Injector 4 | — | W39 | — | 0.5 | OEM-A-2 | — | — | — |
| 5 | Injector 5 | — | W40 | — | 0.5 | OEM-A-4 | — | — | — |
| 6 | Injector 6 | — | W41 | — | 0.5 | OEM-A-6 | — | — | — |
| 7 | Injector 7 | — | W52 | — | 0.5 | OEM-A-14 | — | — | — |
| 8 | Injector 8 | — | W53 | — | 0.5 | OEM-A-20 | — | — | — |
| 9 | DPO 1 | — | W43 | — | 0.5 | OEM-A-15 | — | — | — |
NEXUSS3-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Trigger + | — | W22 | — | 0.5 | OEM-B-15 | — | — | — |
| 10 | AVI 1 | — | W55 | — | 0.5 | OEM-D-17 | — | — | — |
| 11 | AVI 2 | — | W56 | — | 0.5 | OEM-D-11 | — | — | — |
| 12 | AVI 3 | — | W57 | — | 0.5 | OEM-D-14 | — | — | — |
| 13 | AVI 4 | — | W58 | — | 0.5 | OEM-D-16 | — | — | — |
| 14 | AVI 5 | — | W59 | — | 0.5 | OEM-D-13 | — | — | — |
| 15 | AVI 6 | — | W60 | — | 0.5 | OEM-D-15 | — | — | — |
| 16 | AVI 7 | — | W61 | — | 0.5 | OEM-D-12 | — | — | — |
| 17 | AVI 8 | — | W66 | — | 0.5 | OEM-B-7 | — | — | — |
| 18 | AVI 9 | — | W67 | — | 0.5 | OEM-C-11 | — | — | — |
| 19 | SPI 5 | — | W64 | — | 0.5 | OEM-5-F2 | — | — | — |
| 2 | Trigger - | — | W23 | — | 0.5 | SP-0V-1 | — | — | — |
| 20 | SPI 6 | — | W65 | — | 0.5 | OEM-5-F4 | — | — | — |
| 21 | CAN 2 High | — | — | — | — | — | — | — | — |
| 22 | CAN 2 Low | — | — | — | — | — | — | — | — |
| 23 | Knock 1 | — | W28 | — | 0.5 | OEM-D-4 | — | — | — |
| 24 | Knock 2 | — | W29 | — | 0.5 | OEM-D-3 | — | — | — |
| 25 | +5V | — | W21 | — | 0.5 | SP-5V1-1 | — | — | — |
| 26 | Signal ground | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 27 | AVI 10 | — | W68 | — | 0.5 | OEM-C-3 | — | — | — |
| 28 | AVI 11 | — | W69 | — | 0.5 | OEM-C-5 | — | — | — |
| 29 | WBI 1 Heater + | — | — | — | — | — | — | — | — |
| 3 | Home + | — | W25 | — | 0.5 | OEM-B-11 | — | — | — |
| 30 | WBI 1 Input | — | — | — | — | — | — | — | — |
| 31 | WBI 1 Pump | — | — | — | — | — | — | — | — |
| 32 | WBI 1 Nernst | — | — | — | — | — | — | — | — |
| 33 | WBI 1 Heater - | — | W48 | — | 0.5 | OEM-A-10 | — | — | — |
| 34 | WBI 1 Cal | — | — | — | — | — | — | — | — |
| 4 | Home - | — | W26 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | SPI 1 | — | W24 | — | 0.5 | OEM-B-13 | — | — | — |
| 6 | SPI 2 | — | W27 | — | 0.5 | OEM-B-9 | — | — | — |
| 7 | SPI 3 | — | W62 | — | 0.5 | OEM-C-2 | — | — | — |
| 8 | SPI 4 | — | W63 | — | 0.5 | OEM-D-9 | — | — | — |
| 9 | +8V | — | — | — | — | — | — | — | — |
OEM-5
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| F2 | Front VTEC pressure switch | — | W64 | — | 0.5 | NEXUSS3-C-19 | — | — | — |
| F4 | Rear VTEC pressure switch | — | W65 | — | 0.5 | NEXUSS3-C-20 | — | — | — |
| F5 | Front VTEC solenoid valve | — | W46 | — | 0.5 | NEXUSS3-A-19 | — | — | — |
| F7 | Rear VTEC solenoid valve | — | W47 | — | 0.5 | NEXUSS3-A-20 | — | — | — |
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 1 | — | W36 | — | 0.5 | NEXUSS3-A-1 | — | — | — |
| 10 | Front O2 sensor heater (HTCNTF) | — | W48 | — | 0.5 | NEXUSS3-C-33 | — | — | — |
| 11 | EGR control solenoid | — | W50 | — | 0.5 | NEXUSS3-A-16 | — | — | — |
| 12 | Rear O2 sensor heater (HTCNTR) | — | W49 | — | 0.5 | NEXUSS3-A-15 | — | — | — |
| 13 | Check engine light (WARN) | — | W51 | — | 0.5 | NEXUSS3-A-17 | — | — | — |
| 14 | Chamber volume control solenoid (BPS) | — | W52 | — | 0.5 | NEXUSS3-A-7 | — | — | — |
| 15 | A/C clutch relay (ACC) | — | W43 | — | 0.5 | NEXUSS3-A-9 | — | — | — |
| 18 | Radiator fan control (FANCNTR) | — | W44 | — | 0.5 | NEXUSS3-A-12 | — | — | — |
| 2 | Injector 4 | — | W39 | — | 0.5 | NEXUSS3-A-4 | — | — | — |
| 20 | EVAP purge cut-off solenoid (PGS) | — | W53 | — | 0.5 | NEXUSS3-A-8 | — | — | — |
| 21 | Ignition coil 1 | — | W30 | — | 0.5 | NEXUSS3-A-27 | — | — | — |
| 22 | Ignition coil 2 | — | W31 | — | 0.5 | NEXUSS3-A-28 | — | — | — |
| 23 | Power ground (PG1) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 24 | Power ground (PG2) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 25 | ECU power (IGP1) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 26 | Sensor ground (LG1) | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Injector 2 | — | W37 | — | 0.5 | NEXUSS3-A-2 | — | — | — |
| 4 | Injector 5 | — | W40 | — | 0.5 | NEXUSS3-A-5 | — | — | — |
| 5 | Injector 3 | — | W38 | — | 0.5 | NEXUSS3-A-3 | — | — | — |
| 6 | Injector 6 | — | W41 | — | 0.5 | NEXUSS3-A-6 | — | — | — |
| 7 | Main relay | — | W45 | — | 0.5 | NEXUSS3-A-14 | — | — | — |
| 8 | Fuel pump relay 2 (FLR2) | — | W42 | — | 0.5 | NEXUSS3-A-26 | — | — | — |
| 9 | Idle air control valve (IACV) | — | W54 | — | 0.5 | NEXUSS3-A-21 | — | — | — |
OEM-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | CYL 2M — CYP sensor 2 return | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 11 | CYL 1P — CYP sensor 1 signal | — | W25 | — | 0.5 | NEXUSS3-C-3 | — | — | — |
| 12 | CYL 1M — CYP sensor 1 return | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 13 | CRNK 2P — TDC sensor signal | — | W24 | — | 0.5 | NEXUSS3-C-5 | — | — | — |
| 14 | CRNK 2M — TDC sensor return | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 15 | CRNK 1P — crank sensor signal | — | W22 | — | 0.5 | NEXUSS3-C-1 | — | — | — |
| 16 | CRNK 1M — crank sensor return | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | Chassis ground (LG2) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | Ignition coil 6 | — | W35 | — | 0.5 | NEXUSS3-A-32 | — | — | — |
| 4 | Ignition coil 5 | — | W34 | — | 0.5 | NEXUSS3-A-31 | — | — | — |
| 6 | Ignition coil 4 | — | W33 | — | 0.5 | NEXUSS3-A-30 | — | — | — |
| 7 | Neutral switch (M/T) / gear position (A/T) | — | W66 | — | 0.5 | NEXUSS3-C-17 | — | — | — |
| 8 | Ignition coil 3 | — | W32 | — | 0.5 | NEXUSS3-A-29 | — | — | — |
| 9 | CYL 2P — CYP sensor 2 signal | — | W27 | — | 0.5 | NEXUSS3-C-6 | — | — | — |
OEM-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU power (IGP2) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 10 | Traction control | — | — | — | — | — | — | — | — |
| 11 | Starter switch (STS) | — | W67 | — | 0.5 | NEXUSS3-C-18 | — | — | — |
| 12 | Traction control | — | — | — | — | — | — | — | — |
| 2 | Vehicle speed sensor (VSS) | — | W62 | — | 0.5 | NEXUSS3-C-7 | — | — | — |
| 3 | A/C switch (ACS) | — | W68 | — | 0.5 | NEXUSS3-C-27 | — | — | — |
| 4 | Tachometer output (NEP) | — | — | — | — | — | — | — | — |
| 5 | A/C pressure switch (PDSW) | — | W69 | — | 0.5 | NEXUSS3-C-28 | — | — | — |
| 6 | Traction control | — | — | — | — | — | — | — | — |
| 7 | Clutch switch (M/T) | — | — | — | — | — | — | — | — |
| 8 | Traction control | — | — | — | — | — | — | — | — |
| 9 | Service check connector (SCS) | — | — | — | — | — | — | — | — |
OEM-D
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Battery backup (VBU) | — | — | — | — | — | — | — | — |
| 11 | Throttle position sensor (TPS) | — | W56 | — | 0.5 | NEXUSS3-C-11 | — | — | — |
| 12 | EGR lift sensor (EGRL) | — | W61 | — | 0.5 | NEXUSS3-C-16 | — | — | — |
| 13 | Engine coolant temperature (ECT) | — | W59 | — | 0.5 | NEXUSS3-C-14 | — | — | — |
| 14 | Primary O2 sensor | — | W57 | — | 0.5 | NEXUSS3-C-12 | — | — | — |
| 15 | Intake air temperature (IAT) | — | W60 | — | 0.5 | NEXUSS3-C-15 | — | — | — |
| 16 | Secondary O2 sensor | — | W58 | — | 0.5 | NEXUSS3-C-13 | — | — | — |
| 17 | MAP sensor | — | W55 | — | 0.5 | NEXUSS3-C-10 | — | — | — |
| 18 | +5V sensor supply (VCC) | — | W18 | — | 0.5 | SP-5V1-1 | — | — | — |
| 19 | +5V sensor supply (VCC) | — | W19 | — | 0.5 | SP-5V1-1 | — | — | — |
| 20 | +5V sensor supply (VCC) | — | W20 | — | 0.5 | SP-5V1-1 | — | — | — |
| 21 | Sensor ground (SG) | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Sensor ground (SG) | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Knock sensor — rear | — | W29 | — | 0.5 | NEXUSS3-C-24 | — | — | — |
| 4 | Knock sensor — front | — | W28 | — | 0.5 | NEXUSS3-C-23 | — | — | — |
| 5 | Traction control | — | — | — | — | — | — | — | — |
| 6 | Fuel pump voltage monitor (VFP) | — | — | — | — | — | — | — | — |
| 8 | Ignition timing adjuster (IGADJ) | — | — | — | — | — | — | — | — |
| 9 | Alternator FR signal | — | W63 | — | 0.5 | NEXUSS3-C-8 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W10 | — | 0.5 | OEM-A-26 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-B-10 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-B-12 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-B-14 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-B-16 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-D-21 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-D-22 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | NEXUSS3-C-26 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | NEXUSS3-C-2 | — | — | — |
| 1 | — | — | W26 | — | 0.5 | NEXUSS3-C-4 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A-25 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-C-1 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | NEXUSS3-A-18 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | NEXUSS3-A-25 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W18 | — | 0.5 | OEM-D-18 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | OEM-D-19 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | OEM-D-20 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | NEXUSS3-C-25 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-A-23 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-A-24 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-B-2 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | NEXUSS3-A-10 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | NEXUSS3-A-11 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-5-F2 | Front VTEC pressure switch | digital_in | NEXUSS3-C-19 | SPI 5 | digital_in | single_source | |
| OEM-5-F4 | Rear VTEC pressure switch | digital_in | NEXUSS3-C-20 | SPI 6 | digital_in | single_source | |
| OEM-5-F5 | Front VTEC solenoid valve | high_side_out | NEXUSS3-A-19 | HBO 1 | hbridge_out | single_source | |
| OEM-5-F7 | Rear VTEC solenoid valve | high_side_out | NEXUSS3-A-20 | HBO 2 | hbridge_out | single_source | |
| OEM-A-1 | Injector 1 | injector_out | NEXUSS3-A-1 | Injector 1 | injector_out | single_source | |
| OEM-A-10 | Front O2 sensor heater (HTCNTF) | low_side_out | NEXUSS3-C-33 | WBI 1 Heater - | low_side_out | single_source | |
| OEM-A-11 | EGR control solenoid | low_side_out | NEXUSS3-A-16 | DPO 5 | low_side_out | single_source | |
| OEM-A-12 | Rear O2 sensor heater (HTCNTR) | low_side_out | NEXUSS3-A-15 | DPO 4 | low_side_out | single_source | |
| OEM-A-13 | Check engine light (WARN) | low_side_out | NEXUSS3-A-17 | DPO 6 | low_side_out | single_source | |
| OEM-A-14 | Chamber volume control solenoid (BPS) | low_side_out | NEXUSS3-A-7 | Injector 7 | injector_out | single_source | |
| OEM-A-15 | A/C clutch relay (ACC) | low_side_out | NEXUSS3-A-9 | DPO 1 | low_side_out | single_source | |
| OEM-A-18 | Radiator fan control (FANCNTR) | low_side_out | NEXUSS3-A-12 | DPO 2 | low_side_out | single_source | |
| OEM-A-2 | Injector 4 | injector_out | NEXUSS3-A-4 | Injector 4 | injector_out | single_source | |
| OEM-A-20 | EVAP purge cut-off solenoid (PGS) | low_side_out | NEXUSS3-A-8 | Injector 8 | injector_out | single_source | |
| OEM-A-21 | Ignition coil 1 | ignition_out | NEXUSS3-A-27 | Ignition 1 | ignition_out | single_source | |
| OEM-A-22 | Ignition coil 2 | ignition_out | NEXUSS3-A-28 | Ignition 2 | ignition_out | single_source | |
| OEM-A-23 | Power ground (PG1) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-A-24 | Power ground (PG2) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-A-25 | ECU power (IGP1) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source | |
| OEM-A-26 | Sensor 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 2 | injector_out | NEXUSS3-A-2 | Injector 2 | injector_out | single_source | |
| OEM-A-4 | Injector 5 | injector_out | NEXUSS3-A-5 | Injector 5 | injector_out | corroborated | |
| OEM-A-5 | Injector 3 | injector_out | NEXUSS3-A-3 | Injector 3 | injector_out | single_source | |
| OEM-A-6 | Injector 6 | injector_out | NEXUSS3-A-6 | Injector 6 | injector_out | single_source | |
| OEM-A-7 | Main relay | low_side_out | NEXUSS3-A-14 | DPO 3 | low_side_out | single_source | |
| OEM-A-8 | Fuel pump relay 2 (FLR2) | low_side_out | NEXUSS3-A-26 | ECR output | low_side_out | single_source | |
| OEM-A-9 | Idle air control valve (IACV) | low_side_out | NEXUSS3-A-21 | HBO 3 | hbridge_out | single_source | |
| OEM-B-10 | CYL 2M — CYP sensor 2 return | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-B-11 | CYL 1P — CYP sensor 1 signal | trigger_in | NEXUSS3-C-3 | Home + | trigger_in | single_source | |
| OEM-B-12 | CYL 1M — CYP sensor 1 return | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-B-13 | CRNK 2P — TDC sensor signal | trigger_in | NEXUSS3-C-5 | SPI 1 | digital_in | single_source | |
| OEM-B-14 | CRNK 2M — TDC sensor return | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-B-15 | CRNK 1P — crank sensor signal | trigger_in | NEXUSS3-C-1 | Trigger + | trigger_in | single_source | |
| OEM-B-16 | CRNK 1M — crank sensor return | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-B-2 | Chassis ground (LG2) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-B-3 | Ignition coil 6 | ignition_out | NEXUSS3-A-32 | Ignition 6 | ignition_out | single_source | |
| OEM-B-4 | Ignition coil 5 | ignition_out | NEXUSS3-A-31 | Ignition 5 | ignition_out | single_source | |
| OEM-B-6 | Ignition coil 4 | ignition_out | NEXUSS3-A-30 | Ignition 4 | ignition_out | single_source | |
| OEM-B-7 | Neutral switch (M/T) / gear position (A/T) | digital_in | NEXUSS3-C-17 | AVI 8 | analog_in | single_source | |
| OEM-B-8 | Ignition coil 3 | ignition_out | NEXUSS3-A-29 | Ignition 3 | ignition_out | single_source | |
| OEM-B-9 | CYL 2P — CYP sensor 2 signal | trigger_in | NEXUSS3-C-6 | SPI 2 | digital_in | single_source | |
| OEM-C-1 | ECU power (IGP2) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source | |
| OEM-C-10 | Traction control | — | — | — | — | single_source | |
| OEM-C-11 | Starter switch (STS) | digital_in | NEXUSS3-C-18 | AVI 9 | analog_in | single_source | |
| OEM-C-12 | Traction control | — | — | — | — | single_source | |
| OEM-C-2 | Vehicle speed sensor (VSS) | digital_in | NEXUSS3-C-7 | SPI 3 | digital_in | single_source | |
| OEM-C-3 | A/C switch (ACS) | digital_in | NEXUSS3-C-27 | AVI 10 | analog_in | single_source | |
| OEM-C-4 | Tachometer output (NEP) | tacho_out | — | — | — | single_source | |
| OEM-C-5 | A/C pressure switch (PDSW) | digital_in | NEXUSS3-C-28 | AVI 11 | analog_in | single_source | |
| OEM-C-6 | Traction control | — | — | — | — | single_source | |
| OEM-C-7 | Clutch switch (M/T) | digital_in | — | — | — | single_source | |
| OEM-C-8 | Traction control | — | — | — | — | single_source | |
| OEM-C-9 | Service check connector (SCS) | digital_in | — | — | — | single_source | |
| OEM-D-1 | Battery backup (VBU) | power_in | — | — | — | single_source | |
| OEM-D-11 | Throttle position sensor (TPS) | analog_in | NEXUSS3-C-11 | AVI 2 | analog_in | single_source | |
| OEM-D-12 | EGR lift sensor (EGRL) | analog_in | NEXUSS3-C-16 | AVI 7 | analog_in | single_source | |
| OEM-D-13 | Engine coolant temperature (ECT) | temp_in | NEXUSS3-C-14 | AVI 5 | analog_in | single_source | |
| OEM-D-14 | Primary O2 sensor | lambda_nb_in | NEXUSS3-C-12 | AVI 3 | analog_in | single_source | |
| OEM-D-15 | Intake air temperature (IAT) | temp_in | NEXUSS3-C-15 | AVI 6 | analog_in | single_source | |
| OEM-D-16 | Secondary O2 sensor | lambda_nb_in | NEXUSS3-C-13 | AVI 4 | analog_in | single_source | |
| OEM-D-17 | MAP sensor | analog_in | NEXUSS3-C-10 | AVI 1 | analog_in | single_source | |
| OEM-D-18 | +5V sensor supply (VCC) | vref | NEXUSS3-C-25 | +5V | vref | single_source | |
| OEM-D-19 | +5V sensor supply (VCC) | vref | NEXUSS3-C-25 | +5V | vref | single_source | |
| OEM-D-20 | +5V sensor supply (VCC) | vref | NEXUSS3-C-25 | +5V | vref | single_source | |
| OEM-D-21 | Sensor ground (SG) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-D-22 | Sensor ground (SG) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-D-3 | Knock sensor — rear | knock_in | NEXUSS3-C-24 | Knock 2 | knock_in | single_source | |
| OEM-D-4 | Knock sensor — front | knock_in | NEXUSS3-C-23 | Knock 1 | knock_in | single_source | |
| OEM-D-5 | Traction control | — | — | — | — | single_source | |
| OEM-D-6 | Fuel pump voltage monitor (VFP) | — | — | — | — | corroborated | |
| OEM-D-8 | Ignition timing adjuster (IGADJ) | digital_in | — | — | — | single_source | |
| OEM-D-9 | Alternator FR signal | digital_in | NEXUSS3-C-8 | SPI 4 | digital_in | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-A-25 | SP-14V-1 | 0.85 | no route | ECU power (IGP1) | — | |
| W2 | OEM-C-1 | SP-14V-1 | 0.85 | no route | ECU power (IGP2) | — | |
| W3 | SP-14V-1 | NEXUSS3-A-18 | 0.85 | no route | +12V switched input | — | |
| W4 | SP-14V-1 | NEXUSS3-A-25 | 0.85 | no route | +12V switched input | — | |
| W5 | OEM-A-23 | SP-GND-1 | 0.85 | no route | Power ground (PG1) | — | |
| W6 | OEM-A-24 | SP-GND-1 | 0.85 | no route | Power ground (PG2) | — | |
| W7 | OEM-B-2 | SP-GND-1 | 0.85 | no route | Chassis ground (LG2) | — | |
| W8 | SP-GND-1 | NEXUSS3-A-10 | 0.85 | no route | Battery ground | — | |
| W9 | SP-GND-1 | NEXUSS3-A-11 | 0.85 | no route | Battery ground | — | |
| W10 | OEM-A-26 | SP-0V-1 | 0.5 | no route | Sensor ground (LG1) | — | |
| W11 | OEM-B-10 | SP-0V-1 | 0.5 | no route | CYL 2M — CYP sensor 2 return | — | |
| W12 | OEM-B-12 | SP-0V-1 | 0.5 | no route | CYL 1M — CYP sensor 1 return | — | |
| W13 | OEM-B-14 | SP-0V-1 | 0.5 | no route | CRNK 2M — TDC sensor return | — | |
| W14 | OEM-B-16 | SP-0V-1 | 0.5 | no route | CRNK 1M — crank sensor return | — | |
| W15 | OEM-D-21 | SP-0V-1 | 0.5 | no route | Sensor ground (SG) | — | |
| W16 | OEM-D-22 | SP-0V-1 | 0.5 | no route | Sensor ground (SG) | — | |
| W17 | SP-0V-1 | NEXUSS3-C-26 | 0.5 | no route | Signal ground | — | |
| W18 | OEM-D-18 | SP-5V1-1 | 0.5 | no route | +5V sensor supply (VCC) | — | |
| W19 | OEM-D-19 | SP-5V1-1 | 0.5 | no route | +5V sensor supply (VCC) | — | |
| W20 | OEM-D-20 | SP-5V1-1 | 0.5 | no route | +5V sensor supply (VCC) | — | |
| W21 | SP-5V1-1 | NEXUSS3-C-25 | 0.5 | no route | +5V | — | |
| W22 | OEM-B-15 | NEXUSS3-C-1 | 0.5 | no route | CRNK 1P — crank sensor signal | — | |
| W23 | SP-0V-1 | NEXUSS3-C-2 | 0.5 | no route | Trigger - | — | |
| W24 | OEM-B-13 | NEXUSS3-C-5 | 0.5 | no route | CRNK 2P — TDC sensor signal | — | |
| W25 | OEM-B-11 | NEXUSS3-C-3 | 0.5 | no route | CYL 1P — CYP sensor 1 signal | — | |
| W26 | SP-0V-1 | NEXUSS3-C-4 | 0.5 | no route | Home - | — | |
| W27 | OEM-B-9 | NEXUSS3-C-6 | 0.5 | no route | CYL 2P — CYP sensor 2 signal | — | |
| W28 | OEM-D-4 | NEXUSS3-C-23 | 0.5 | no route | Knock sensor — front | — | |
| W29 | OEM-D-3 | NEXUSS3-C-24 | 0.5 | no route | Knock sensor — rear | — | |
| W30 | OEM-A-21 | NEXUSS3-A-27 | 0.5 | no route | Ignition coil 1 | — | |
| W31 | OEM-A-22 | NEXUSS3-A-28 | 0.5 | no route | Ignition coil 2 | — | |
| W32 | OEM-B-8 | NEXUSS3-A-29 | 0.5 | no route | Ignition coil 3 | — | |
| W33 | OEM-B-6 | NEXUSS3-A-30 | 0.5 | no route | Ignition coil 4 | — | |
| W34 | OEM-B-4 | NEXUSS3-A-31 | 0.5 | no route | Ignition coil 5 | — | |
| W35 | OEM-B-3 | NEXUSS3-A-32 | 0.5 | no route | Ignition coil 6 | — | |
| W36 | OEM-A-1 | NEXUSS3-A-1 | 0.5 | no route | Injector 1 | — | |
| W37 | OEM-A-3 | NEXUSS3-A-2 | 0.5 | no route | Injector 2 | — | |
| W38 | OEM-A-5 | NEXUSS3-A-3 | 0.5 | no route | Injector 3 | — | |
| W39 | OEM-A-2 | NEXUSS3-A-4 | 0.5 | no route | Injector 4 | — | |
| W40 | OEM-A-4 | NEXUSS3-A-5 | 0.5 | no route | Injector 5 | — | |
| W41 | OEM-A-6 | NEXUSS3-A-6 | 0.5 | no route | Injector 6 | — | |
| W42 | OEM-A-8 | NEXUSS3-A-26 | 0.5 | no route | Fuel pump relay 2 (FLR2) | — | |
| W43 | OEM-A-15 | NEXUSS3-A-9 | 0.5 | no route | A/C clutch relay (ACC) | — | |
| W44 | OEM-A-18 | NEXUSS3-A-12 | 0.5 | no route | Radiator fan control (FANCNTR) | — | |
| W45 | OEM-A-7 | NEXUSS3-A-14 | 0.5 | no route | Main relay | — | |
| W46 | OEM-5-F5 | NEXUSS3-A-19 | 0.5 | no route | Front VTEC solenoid valve | — | |
| W47 | OEM-5-F7 | NEXUSS3-A-20 | 0.5 | no route | Rear VTEC solenoid valve | — | |
| W48 | OEM-A-10 | NEXUSS3-C-33 | 0.5 | no route | Front O2 sensor heater (HTCNTF) | — | |
| W49 | OEM-A-12 | NEXUSS3-A-15 | 0.5 | no route | Rear O2 sensor heater (HTCNTR) | — | |
| W50 | OEM-A-11 | NEXUSS3-A-16 | 0.5 | no route | EGR control solenoid | — | |
| W51 | OEM-A-13 | NEXUSS3-A-17 | 0.5 | no route | Check engine light (WARN) | — | |
| W52 | OEM-A-14 | NEXUSS3-A-7 | 0.5 | no route | Chamber volume control solenoid (BPS) | — | |
| W53 | OEM-A-20 | NEXUSS3-A-8 | 0.5 | no route | EVAP purge cut-off solenoid (PGS) | — | |
| W54 | OEM-A-9 | NEXUSS3-A-21 | 0.5 | no route | Idle air control valve (IACV) | — | |
| W55 | OEM-D-17 | NEXUSS3-C-10 | 0.5 | no route | MAP sensor | — | |
| W56 | OEM-D-11 | NEXUSS3-C-11 | 0.5 | no route | Throttle position sensor (TPS) | — | |
| W57 | OEM-D-14 | NEXUSS3-C-12 | 0.5 | no route | Primary O2 sensor | — | |
| W58 | OEM-D-16 | NEXUSS3-C-13 | 0.5 | no route | Secondary O2 sensor | — | |
| W59 | OEM-D-13 | NEXUSS3-C-14 | 0.5 | no route | Engine coolant temperature (ECT) | — | |
| W60 | OEM-D-15 | NEXUSS3-C-15 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W61 | OEM-D-12 | NEXUSS3-C-16 | 0.5 | no route | EGR lift sensor (EGRL) | — | |
| W62 | OEM-C-2 | NEXUSS3-C-7 | 0.5 | no route | Vehicle speed sensor (VSS) | — | |
| W63 | OEM-D-9 | NEXUSS3-C-8 | 0.5 | no route | Alternator FR signal | — | |
| W64 | OEM-5-F2 | NEXUSS3-C-19 | 0.5 | no route | Front VTEC pressure switch | — | |
| W65 | OEM-5-F4 | NEXUSS3-C-20 | 0.5 | no route | Rear VTEC pressure switch | — | |
| W66 | OEM-B-7 | NEXUSS3-C-17 | 0.5 | no route | Neutral switch (M/T) / gear position (A/T) | — | |
| W67 | OEM-C-11 | NEXUSS3-C-18 | 0.5 | no route | Starter switch (STS) | — | |
| W68 | OEM-C-3 | NEXUSS3-C-27 | 0.5 | no route | A/C switch (ACS) | — | |
| W69 | OEM-C-5 | NEXUSS3-C-28 | 0.5 | no route | A/C pressure switch (PDSW) | — |
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 (15)
| Severity | Code | Subject | Message |
|---|---|---|---|
| warn | NET_FAMILY | OEM-5-F5 ↔ NEXUSS3-A-19 | OEM-5-F5 "Front VTEC solenoid valve" [high_side_out] is wired to NEXUSS3-A-19 "HBO 1" [hbridge_out]. A half-bridge can act as a high-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-5-F7 ↔ NEXUSS3-A-20 | OEM-5-F7 "Rear VTEC solenoid valve" [high_side_out] is wired to NEXUSS3-A-20 "HBO 2" [hbridge_out]. A half-bridge can act as a high-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-A-9 ↔ NEXUSS3-A-21 | OEM-A-9 "Idle air control valve (IACV)" [low_side_out] is wired to NEXUSS3-A-21 "HBO 3" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-B-13 ↔ NEXUSS3-C-5 | OEM-B-13 "CRNK 2P — TDC sensor signal" [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 | NET_FAMILY | OEM-B-7 ↔ NEXUSS3-C-17 | OEM-B-7 "Neutral switch (M/T) / gear position (A/T)" [digital_in] is wired to NEXUSS3-C-17 "AVI 8" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| warn | NET_FAMILY | OEM-B-9 ↔ NEXUSS3-C-6 | OEM-B-9 "CYL 2P — CYP sensor 2 signal" [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-C-11 ↔ NEXUSS3-C-18 | OEM-C-11 "Starter switch (STS)" [digital_in] is wired to NEXUSS3-C-18 "AVI 9" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| warn | NET_FAMILY | OEM-C-3 ↔ NEXUSS3-C-27 | OEM-C-3 "A/C switch (ACS)" [digital_in] is wired to NEXUSS3-C-27 "AVI 10" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| warn | NET_FAMILY | OEM-C-5 ↔ NEXUSS3-C-28 | OEM-C-5 "A/C pressure switch (PDSW)" [digital_in] is wired to NEXUSS3-C-28 "AVI 11" [analog_in]. Analog and digital on one net. A switch on an analog input works with a pull-up and a threshold; an analog sensor on a digital input loses its value. |
| info | NET_FAMILY | OEM-A-14 ↔ NEXUSS3-A-7 | OEM-A-14 "Chamber volume control solenoid (BPS)" [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-A-20 ↔ NEXUSS3-A-8 | OEM-A-20 "EVAP purge cut-off solenoid (PGS)" [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-B-16 ↔ NEXUSS3-C-4 | OEM-B-16 "CRNK 1M — crank sensor return" [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 | NET_FAMILY | OEM-D-13 ↔ NEXUSS3-C-14 | OEM-D-13 "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-15 ↔ NEXUSS3-C-15 | OEM-D-15 "Intake air temperature (IAT)" [temp_in] is wired to NEXUSS3-C-15 "AVI 6" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | UNMAPPED | OEM | 10 optional OEM pins are not mapped: OEM-C-10 Traction control; OEM-C-12 Traction control; OEM-C-4 Tachometer output (NEP); OEM-C-6 Traction control; OEM-C-7 Clutch switch (M/T); OEM-C-8 Traction control; OEM-C-9 Service check connector (SCS); OEM-D-5 Traction control; OEM-D-6 Fuel pump voltage monitor (VFP); OEM-D-8 Ignition timing adjuster (IGADJ) |
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 2026-10-06. Review every wire against both manuals before building. Not wired: - OEM-D 1: Battery backup (VBU): Haltech Nexus S3 has no battery-constant input; not needed - OEM-C 4: Tachometer output (NEP): no free tacho/frequency_out/low_side/ls_hs on Haltech Nexus S3 - OEM-C 7: Clutch switch (M/T): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-C 9: Service check connector (SCS): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-D 8: Ignition timing adjuster (IGADJ): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-C 10: Traction control: not classified in the library; wire by hand - OEM-C 12: Traction control: not classified in the library; wire by hand - OEM-C 6: Traction control: not classified in the library; wire by hand - OEM-C 8: Traction control: not classified in the library; wire by hand - OEM-D 5: Traction control: not classified in the library; wire by hand - OEM-D 6: Fuel pump voltage monitor (VFP): not classified in the library; wire by hand - 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 | AEM EMS 30-1042 (Series 1) plug-and-play install manual — 1991-94 NSX | https://fancy-craft.firebaseapp.com/NSX/report/ecu/EMS_-_30-1042.pdf | archive | 2026-10-05 | 0cad10bc64b5 |
| 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 |
| 3 | vendor_doc | dodo-upgrades: Honda OBD1 V6 ECU pinout | https://dodo-upgrades.nl/index.php/obd1-v6-pinouts/ | archive | 2026-10-05 | f9539af28904 |