Toyota 86 (ZN6, FA20) → Haltech Nexus S3 HT-213000 (auto)
Toyota 86 (ZN6, FA20) — Haltech — Nexus S3
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-09
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 | 1: read the Findings page before cutting any wire |
| Size of the job | 73 wires · 10 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-A33-1 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-A34-6 | 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-A33-4 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-A34-1 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-A34-2 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-A34-3 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-A36-3 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-A36-4 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | NEXUSS3-A-10 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | SP-GND-1 | NEXUSS3-A-11 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-A33-29 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-A34-27 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-A35-29 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-A35-30 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-A36-29 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | SP-0V-1 | NEXUSS3-C-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-A34-34 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-A35-21 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-A35-22 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-A36-19 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | SP-5V1-1 | NEXUSS3-C-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-A34-16 | NEXUSS3-C-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | SP-0V-1 | NEXUSS3-C-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-A34-14 | NEXUSS3-C-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | SP-0V-1 | NEXUSS3-C-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-A34-26 | NEXUSS3-C-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-A34-25 | NEXUSS3-C-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-A34-15 | NEXUSS3-C-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-A34-28 | NEXUSS3-C-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-A34-17 | NEXUSS3-C-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-A36-21 | NEXUSS3-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-A36-10 | NEXUSS3-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-A36-31 | NEXUSS3-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-A36-8 | NEXUSS3-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-A36-12 | NEXUSS3-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-A36-14 | NEXUSS3-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-A36-22 | NEXUSS3-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-A36-25 | NEXUSS3-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-A36-24 | NEXUSS3-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-A36-32 | NEXUSS3-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A36-13 | NEXUSS3-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A36-23 | NEXUSS3-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A33-27 | NEXUSS3-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-A36-1 | NEXUSS3-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-A36-2 | NEXUSS3-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-A35-13 | NEXUSS3-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-A35-12 | NEXUSS3-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-A35-11 | NEXUSS3-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-A33-20 | NEXUSS3-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-A35-17 | NEXUSS3-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-A35-35 | NEXUSS3-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-A35-5 | NEXUSS3-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-A35-7 | NEXUSS3-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-A34-5 | NEXUSS3-C-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-A36-6 | NEXUSS3-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-A33-22 | NEXUSS3-C-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-A34-20 | NEXUSS3-C-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-A35-31 | NEXUSS3-C-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-A36-28 | NEXUSS3-C-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-A35-23 | NEXUSS3-C-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W63 | OEM-A36-18 | NEXUSS3-C-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W64 | OEM-A34-21 | NEXUSS3-C-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W65 | OEM-A36-30 | NEXUSS3-C-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W66 | OEM-A33-12 | NEXUSS3-C-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W67 | OEM-A36-20 | NEXUSS3-C-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W68 | OEM-A33-8 | NEXUSS3-C-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W69 | OEM-A33-14 | NEXUSS3-C-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W70 | OEM-A33-15 | NEXUSS3-C-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W71 | OEM-A33-16 | NEXUSS3-C-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W72 | OEM-A33-19 | NEXUSS3-A-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W73 | OEM-A33-18 | NEXUSS3-A-24 | 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-A-10 | open (OL) | +12 V supply must not touch power ground | |
| 2 | NEXUSS3-A-18 | NEXUSS3-C-2 | open (OL) | +12 V supply must not touch sensor ground | |
| 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 | — | W37 | — | 0.5 | OEM-A36-12 | — | — | — |
| 10 | Battery ground | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | Battery ground | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| 12 | DPO 2 | — | W50 | — | 0.5 | OEM-A35-11 | — | — | — |
| 13 | Ignition switch input | — | W45 | — | 0.5 | OEM-A33-27 | — | — | — |
| 14 | DPO 3 | — | W51 | — | 0.5 | OEM-A33-20 | — | — | — |
| 15 | DPO 4 | — | W52 | — | 0.5 | OEM-A35-17 | — | — | — |
| 16 | DPO 5 | — | W53 | — | 0.5 | OEM-A35-35 | — | — | — |
| 17 | DPO 6 | — | W54 | — | 0.5 | OEM-A35-5 | — | — | — |
| 18 | +12V switched input | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 19 | HBO 1 | — | W46 | — | 0.5 | OEM-A36-1 | — | — | — |
| 2 | Injector 2 | — | W38 | — | 0.5 | OEM-A36-14 | — | — | — |
| 20 | HBO 2 | — | W47 | — | 0.5 | OEM-A36-2 | — | — | — |
| 21 | HBO 3 | — | W55 | — | 0.5 | OEM-A35-7 | — | — | — |
| 22 | HBO 4 | — | W57 | — | 0.5 | OEM-A36-6 | — | — | — |
| 23 | CAN 1 High | — | W72 | — | 0.5 | OEM-A33-19 | — | — | — |
| 24 | CAN 1 Low | — | W73 | — | 0.5 | OEM-A33-18 | — | — | — |
| 25 | +12V switched input | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 26 | ECR output | — | W48 | — | 0.5 | OEM-A35-13 | — | — | — |
| 27 | Ignition 1 | — | W33 | — | 0.5 | OEM-A36-21 | — | — | — |
| 28 | Ignition 2 | — | W34 | — | 0.5 | OEM-A36-10 | — | — | — |
| 29 | Ignition 3 | — | W35 | — | 0.5 | OEM-A36-31 | — | — | — |
| 3 | Injector 3 | — | W39 | — | 0.5 | OEM-A36-22 | — | — | — |
| 30 | Ignition 4 | — | W36 | — | 0.5 | OEM-A36-8 | — | — | — |
| 31 | Ignition 5 | — | — | — | — | — | — | — | — |
| 32 | Ignition 6 | — | — | — | — | — | — | — | — |
| 33 | Ignition 7 | — | — | — | — | — | — | — | — |
| 34 | Ignition 8 | — | — | — | — | — | — | — | — |
| 4 | Injector 4 | — | W40 | — | 0.5 | OEM-A36-25 | — | — | — |
| 5 | Injector 5 | — | W41 | — | 0.5 | OEM-A36-24 | — | — | — |
| 6 | Injector 6 | — | W42 | — | 0.5 | OEM-A36-32 | — | — | — |
| 7 | Injector 7 | — | W43 | — | 0.5 | OEM-A36-13 | — | — | — |
| 8 | Injector 8 | — | W44 | — | 0.5 | OEM-A36-23 | — | — | — |
| 9 | DPO 1 | — | W49 | — | 0.5 | OEM-A35-12 | — | — | — |
NEXUSS3-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Trigger + | — | W24 | — | 0.5 | OEM-A34-16 | — | — | — |
| 10 | AVI 1 | — | W58 | — | 0.5 | OEM-A33-22 | — | — | — |
| 11 | AVI 2 | — | W59 | — | 0.5 | OEM-A34-20 | — | — | — |
| 12 | AVI 3 | — | W60 | — | 0.5 | OEM-A35-31 | — | — | — |
| 13 | AVI 4 | — | W61 | — | 0.5 | OEM-A36-28 | — | — | — |
| 14 | AVI 5 | — | W62 | — | 0.5 | OEM-A35-23 | — | — | — |
| 15 | AVI 6 | — | W63 | — | 0.5 | OEM-A36-18 | — | — | — |
| 16 | AVI 7 | — | W64 | — | 0.5 | OEM-A34-21 | — | — | — |
| 17 | AVI 8 | — | W65 | — | 0.5 | OEM-A36-30 | — | — | — |
| 18 | AVI 9 | — | W66 | — | 0.5 | OEM-A33-12 | — | — | — |
| 19 | SPI 5 | — | W70 | — | 0.5 | OEM-A33-15 | — | — | — |
| 2 | Trigger - | — | W25 | — | 0.5 | SP-0V-1 | — | — | — |
| 20 | SPI 6 | — | W71 | — | 0.5 | OEM-A33-16 | — | — | — |
| 21 | CAN 2 High | — | — | — | — | — | — | — | — |
| 22 | CAN 2 Low | — | — | — | — | — | — | — | — |
| 23 | Knock 1 | — | W31 | — | 0.5 | OEM-A34-28 | — | — | — |
| 24 | Knock 2 | — | W32 | — | 0.5 | OEM-A34-17 | — | — | — |
| 25 | +5V | — | W23 | — | 0.5 | SP-5V1-1 | — | — | — |
| 26 | Signal ground | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 27 | AVI 10 | — | W67 | — | 0.5 | OEM-A36-20 | — | — | — |
| 28 | AVI 11 | — | W68 | — | 0.5 | OEM-A33-8 | — | — | — |
| 29 | WBI 1 Heater + | — | — | — | — | — | — | — | — |
| 3 | Home + | — | W26 | — | 0.5 | OEM-A34-14 | — | — | — |
| 30 | WBI 1 Input | — | — | — | — | — | — | — | — |
| 31 | WBI 1 Pump | — | — | — | — | — | — | — | — |
| 32 | WBI 1 Nernst | — | — | — | — | — | — | — | — |
| 33 | WBI 1 Heater - | — | W56 | — | 0.5 | OEM-A34-5 | — | — | — |
| 34 | WBI 1 Cal | — | — | — | — | — | — | — | — |
| 4 | Home - | — | W27 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | SPI 1 | — | W28 | — | 0.5 | OEM-A34-26 | — | — | — |
| 6 | SPI 2 | — | W29 | — | 0.5 | OEM-A34-25 | — | — | — |
| 7 | SPI 3 | — | W30 | — | 0.5 | OEM-A34-15 | — | — | — |
| 8 | SPI 4 | — | W69 | — | 0.5 | OEM-A33-14 | — | — | — |
| 9 | +8V | — | — | — | — | — | — | — | — |
OEM-A33
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU power (+B2, main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 12 | Intake air temperature (THA, in MAF) | — | W66 | — | 0.5 | NEXUSS3-C-18 | — | — | — |
| 14 | Starter signal (STSW2) | — | W69 | — | 0.5 | NEXUSS3-C-8 | — | — | — |
| 15 | Clutch switch (CLSW) | — | W70 | — | 0.5 | NEXUSS3-C-19 | — | — | — |
| 16 | Neutral switch (NSW) | — | W71 | — | 0.5 | NEXUSS3-C-20 | — | — | — |
| 17 | Starter signal (STSW2) | — | — | — | — | — | — | — | — |
| 18 | CAN low (CANL) | — | W73 | — | 0.5 | NEXUSS3-A-24 | — | — | — |
| 19 | CAN high (CANH) | — | W72 | — | 0.5 | NEXUSS3-A-23 | — | — | — |
| 2 | Battery constant (BATT, memory) | — | — | — | — | — | — | — | — |
| 20 | Blower relay (HB) | — | W51 | — | 0.5 | NEXUSS3-A-14 | — | — | — |
| 22 | Mass air flow (VG) | — | W58 | — | 0.5 | NEXUSS3-C-10 | — | — | — |
| 27 | Ignition switch sense (IGSW, IG2 relay) | — | W45 | — | 0.5 | NEXUSS3-A-13 | — | — | — |
| 28 | Shield ground (SLE2) | — | — | — | — | — | — | — | — |
| 29 | MAF sensor ground (E2G) | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Stop light switch (ST1-) | — | — | — | — | — | — | — | — |
| 4 | Power ground (EC) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 7 | Stop light switch (STP) | — | — | — | — | — | — | — | — |
| 8 | A/C pressure sensor (ACP) | — | W68 | — | 0.5 | NEXUSS3-C-28 | — | — | — |
OEM-A34
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Power ground (E03) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | DI injector confirmation (IJF1) | — | — | — | — | — | — | — | — |
| 13 | High-pressure fuel pump spill valve (FPF) | — | — | — | — | — | — | — | — |
| 14 | VVT cam sensor exhaust bank 1 (EV1+) | — | W26 | — | 0.5 | NEXUSS3-C-3 | — | — | — |
| 15 | VVT cam sensor intake bank 2 (VV2+) | — | W30 | — | 0.5 | NEXUSS3-C-7 | — | — | — |
| 16 | Crank position (NE+) | — | W24 | — | 0.5 | NEXUSS3-C-1 | — | — | — |
| 17 | Knock sensor 2 (KNK2) | — | W32 | — | 0.5 | NEXUSS3-C-24 | — | — | — |
| 18 | A/F ratio sensor (A1A-) | — | — | — | — | — | — | — | — |
| 19 | A/F ratio sensor (A1A+) | — | — | — | — | — | — | — | — |
| 2 | Power ground (E04) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 20 | Manifold absolute pressure (PIM) | — | W59 | — | 0.5 | NEXUSS3-C-11 | — | — | — |
| 21 | Heated oxygen sensor (OX1B, rear) | — | W64 | — | 0.5 | NEXUSS3-C-16 | — | — | — |
| 25 | VVT cam sensor exhaust bank 2 (EV2+) | — | W29 | — | 0.5 | NEXUSS3-C-6 | — | — | — |
| 26 | VVT cam sensor intake bank 1 (VV1+) | — | W28 | — | 0.5 | NEXUSS3-C-5 | — | — | — |
| 27 | Crank position return (NE-) | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 28 | Knock sensor 1 (KNK1) | — | W31 | — | 0.5 | NEXUSS3-C-23 | — | — | — |
| 29 | Shield ground (EKNK) | — | — | — | — | — | — | — | — |
| 3 | Power ground (E05) | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 30 | Shield ground (SLE1) | — | — | — | — | — | — | — | — |
| 31 | DI injector confirmation (IJF2) | — | — | — | — | — | — | — | — |
| 32 | High-pressure fuel pump spill valve (FPD) | — | — | — | — | — | — | — | — |
| 34 | OCV power source (VCV, 5V) | — | W19 | — | 0.5 | SP-5V1-1 | — | — | — |
| 35 | Shield ground (SLE3) | — | — | — | — | — | — | — | — |
| 5 | A/F ratio sensor heater (HA1A) | — | W56 | — | 0.5 | NEXUSS3-C-33 | — | — | — |
| 6 | ECU power (+B, main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 9 | Fuel pressure sensor (PR) | — | — | — | — | — | — | — | — |
OEM-A35
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Canister vent valve (VPMP) | — | — | — | — | — | — | — | — |
| 10 | Fuel pump control monitor (DI) | — | — | — | — | — | — | — | — |
| 11 | Cooling fan relay 3 (FAN1) | — | W50 | — | 0.5 | NEXUSS3-A-12 | — | — | — |
| 12 | Cooling fan relay 2 (FAN2) | — | W49 | — | 0.5 | NEXUSS3-A-9 | — | — | — |
| 13 | EFI main relay 1 (SSHUT) | — | W48 | — | 0.5 | NEXUSS3-A-26 | — | — | — |
| 15 | Tachometer output (TACH) | — | — | — | — | — | — | — | — |
| 17 | ETCS relay (MCR) | — | W52 | — | 0.5 | NEXUSS3-A-15 | — | — | — |
| 19 | Fuel pump control (FPC) | — | — | — | — | — | — | — | — |
| 20 | Canister pressure sensor (PPMP) | — | — | — | — | — | — | — | — |
| 21 | Accelerator pedal 5V supply (VCPA) | — | W20 | — | 0.5 | SP-5V1-1 | — | — | — |
| 22 | Accelerator pedal 5V supply (VCP2) | — | W21 | — | 0.5 | SP-5V1-1 | — | — | — |
| 23 | Accelerator pedal position (VPA) | — | W62 | — | 0.5 | NEXUSS3-C-14 | — | — | — |
| 26 | Starter signal (STA) | — | — | — | — | — | — | — | — |
| 29 | Accelerator pedal ground (EPA) | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 30 | Accelerator pedal ground (EPA2) | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 31 | Accelerator pedal position 2 (VPA2) | — | W60 | — | 0.5 | NEXUSS3-C-12 | — | — | — |
| 35 | A/C clutch relay (AC) | — | W53 | — | 0.5 | NEXUSS3-A-16 | — | — | — |
| 5 | Injector relay (IREL) | — | W54 | — | 0.5 | NEXUSS3-A-17 | — | — | — |
| 7 | ETCS relay (+BM) | — | W55 | — | 0.5 | NEXUSS3-A-21 | — | — | — |
| 8 | Leak detection pump (MPMP) | — | — | — | — | — | — | — | — |
OEM-A36
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Throttle actuator motor - (M-) | — | W46 | — | 0.5 | NEXUSS3-A-19 | — | — | — |
| 10 | Ignition coil 2 (IGT2) | — | W34 | — | 0.5 | NEXUSS3-A-28 | — | — | — |
| 11 | Purge valve (PRG) | — | — | — | — | — | — | — | — |
| 12 | Injector 1 port (#10) | — | W37 | — | 0.5 | NEXUSS3-A-1 | — | — | — |
| 13 | Injector 4 port (#40) | — | W43 | — | 0.5 | NEXUSS3-A-7 | — | — | — |
| 14 | Injector 1 direct (#1) | — | W38 | — | 0.5 | NEXUSS3-A-2 | — | — | — |
| 16 | OCV intake bank 2 (OC2) | — | — | — | — | — | — | — | — |
| 17 | OCV intake bank 1 (OC1) | — | — | — | — | — | — | — | — |
| 18 | Throttle position (VTA1) | — | W63 | — | 0.5 | NEXUSS3-C-15 | — | — | — |
| 19 | Sensor 5V supply (VC) | — | W22 | — | 0.5 | SP-5V1-1 | — | — | — |
| 2 | Throttle actuator motor + (M+) | — | W47 | — | 0.5 | NEXUSS3-A-20 | — | — | — |
| 20 | Oil temperature (OT) | — | W67 | — | 0.5 | NEXUSS3-C-27 | — | — | — |
| 21 | Ignition coil 1 (IGT1) | — | W33 | — | 0.5 | NEXUSS3-A-27 | — | — | — |
| 22 | Injector 2 port (#20) | — | W39 | — | 0.5 | NEXUSS3-A-3 | — | — | — |
| 23 | Injector 4 direct (#4) | — | W44 | — | 0.5 | NEXUSS3-A-8 | — | — | — |
| 24 | Injector 3 direct (#3) | — | W41 | — | 0.5 | NEXUSS3-A-5 | — | — | — |
| 25 | Injector 2 direct (#2) | — | W40 | — | 0.5 | NEXUSS3-A-4 | — | — | — |
| 28 | Throttle position 2 (VTA2) | — | W61 | — | 0.5 | NEXUSS3-C-13 | — | — | — |
| 29 | Sensor ground (E1) | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Power ground (E02) | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 30 | Engine coolant temperature (THW) | — | W65 | — | 0.5 | NEXUSS3-C-17 | — | — | — |
| 31 | Ignition coil 3 (IGT3) | — | W35 | — | 0.5 | NEXUSS3-A-29 | — | — | — |
| 32 | Injector 3 port (#30) | — | W42 | — | 0.5 | NEXUSS3-A-6 | — | — | — |
| 4 | Power ground (E01) | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 5 | OCV exhaust bank 2 (OE2) | — | — | — | — | — | — | — | — |
| 6 | Heated oxygen sensor heater (HT1B) | — | W57 | — | 0.5 | NEXUSS3-A-22 | — | — | — |
| 7 | OCV exhaust bank 1 (OE1) | — | — | — | — | — | — | — | — |
| 8 | Ignition coil 4 (IGT4) | — | W36 | — | 0.5 | NEXUSS3-A-30 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W13 | — | 0.5 | OEM-A33-29 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-A34-27 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-A35-29 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-A35-30 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | OEM-A36-29 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | NEXUSS3-C-26 | — | — | — |
| 1 | — | — | W25 | — | 0.5 | NEXUSS3-C-2 | — | — | — |
| 1 | — | — | W27 | — | 0.5 | NEXUSS3-C-4 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A33-1 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-A34-6 | — | — | — |
| 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 | — | — | W19 | — | 0.5 | OEM-A34-34 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | OEM-A35-21 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | OEM-A35-22 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | OEM-A36-19 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | NEXUSS3-C-25 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-A33-4 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-A34-1 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-A34-2 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-A34-3 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | OEM-A36-3 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | OEM-A36-4 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | NEXUSS3-A-10 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | NEXUSS3-A-11 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A33-1 | ECU power (+B2, main relay) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source | |
| OEM-A33-12 | Intake air temperature (THA, in MAF) | temp_in | NEXUSS3-C-18 | AVI 9 | analog_in | single_source | |
| OEM-A33-14 | Starter signal (STSW2) | digital_in | NEXUSS3-C-8 | SPI 4 | digital_in | single_source | |
| OEM-A33-15 | Clutch switch (CLSW) | digital_in | NEXUSS3-C-19 | SPI 5 | digital_in | single_source | |
| OEM-A33-16 | Neutral switch (NSW) | digital_in | NEXUSS3-C-20 | SPI 6 | digital_in | single_source | |
| OEM-A33-17 | Starter signal (STSW2) | digital_in | — | — | — | single_source | |
| OEM-A33-18 | CAN low (CANL) | can_l | NEXUSS3-A-24 | CAN 1 Low | can_l | single_source | |
| OEM-A33-19 | CAN high (CANH) | can_h | NEXUSS3-A-23 | CAN 1 High | can_h | single_source | |
| OEM-A33-2 | Battery constant (BATT, memory) | power_in | — | — | — | single_source | |
| OEM-A33-20 | Blower relay (HB) | low_side_out | NEXUSS3-A-14 | DPO 3 | low_side_out | single_source | |
| OEM-A33-22 | Mass air flow (VG) | analog_in | NEXUSS3-C-10 | AVI 1 | analog_in | single_source | |
| OEM-A33-27 | Ignition switch sense (IGSW, IG2 relay) | digital_in | NEXUSS3-A-13 | Ignition switch input | digital_in | single_source | |
| OEM-A33-28 | Shield ground (SLE2) | shield | — | — | — | single_source | |
| OEM-A33-29 | MAF sensor ground (E2G) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-A33-3 | Stop light switch (ST1-) | digital_in | — | — | — | single_source | |
| OEM-A33-4 | Power ground (EC) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-A33-7 | Stop light switch (STP) | digital_in | — | — | — | single_source | |
| OEM-A33-8 | A/C pressure sensor (ACP) | analog_in | NEXUSS3-C-28 | AVI 11 | analog_in | single_source | |
| OEM-A34-1 | Power ground (E03) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-A34-11 | DI injector confirmation (IJF1) | analog_in | — | — | — | single_source | |
| OEM-A34-13 | High-pressure fuel pump spill valve (FPF) | low_side_out | — | — | — | single_source | |
| OEM-A34-14 | VVT cam sensor exhaust bank 1 (EV1+) | trigger_in | NEXUSS3-C-3 | Home + | trigger_in | single_source | |
| OEM-A34-15 | VVT cam sensor intake bank 2 (VV2+) | trigger_in | NEXUSS3-C-7 | SPI 3 | digital_in | single_source | |
| OEM-A34-16 | Crank position (NE+) | trigger_in | NEXUSS3-C-1 | Trigger + | trigger_in | single_source | |
| OEM-A34-17 | Knock sensor 2 (KNK2) | knock_in | NEXUSS3-C-24 | Knock 2 | knock_in | single_source | |
| OEM-A34-18 | A/F ratio sensor (A1A-) | — | — | — | — | single_source | |
| OEM-A34-19 | A/F ratio sensor (A1A+) | — | — | — | — | single_source | |
| OEM-A34-2 | Power ground (E04) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-A34-20 | Manifold absolute pressure (PIM) | analog_in | NEXUSS3-C-11 | AVI 2 | analog_in | single_source | |
| OEM-A34-21 | Heated oxygen sensor (OX1B, rear) | lambda_nb_in | NEXUSS3-C-16 | AVI 7 | analog_in | single_source | |
| OEM-A34-25 | VVT cam sensor exhaust bank 2 (EV2+) | trigger_in | NEXUSS3-C-6 | SPI 2 | digital_in | single_source | |
| OEM-A34-26 | VVT cam sensor intake bank 1 (VV1+) | trigger_in | NEXUSS3-C-5 | SPI 1 | digital_in | single_source | |
| OEM-A34-27 | Crank position return (NE-) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-A34-28 | Knock sensor 1 (KNK1) | knock_in | NEXUSS3-C-23 | Knock 1 | knock_in | single_source | |
| OEM-A34-29 | Shield ground (EKNK) | shield | — | — | — | single_source | |
| OEM-A34-3 | Power ground (E05) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-A34-30 | Shield ground (SLE1) | shield | — | — | — | single_source | |
| OEM-A34-31 | DI injector confirmation (IJF2) | analog_in | — | — | — | single_source | |
| OEM-A34-32 | High-pressure fuel pump spill valve (FPD) | low_side_out | — | — | — | single_source | |
| OEM-A34-34 | OCV power source (VCV, 5V) | vref | NEXUSS3-C-25 | +5V | vref | single_source | |
| OEM-A34-35 | Shield ground (SLE3) | shield | — | — | — | single_source | |
| OEM-A34-5 | A/F ratio sensor heater (HA1A) | low_side_out | NEXUSS3-C-33 | WBI 1 Heater - | low_side_out | single_source | |
| OEM-A34-6 | ECU power (+B, main relay) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source | |
| OEM-A34-9 | Fuel pressure sensor (PR) | analog_in | — | — | — | single_source | |
| OEM-A35-1 | Canister vent valve (VPMP) | low_side_out | — | — | — | single_source | |
| OEM-A35-10 | Fuel pump control monitor (DI) | analog_in | — | — | — | single_source | |
| OEM-A35-11 | Cooling fan relay 3 (FAN1) | low_side_out | NEXUSS3-A-12 | DPO 2 | low_side_out | single_source | |
| OEM-A35-12 | Cooling fan relay 2 (FAN2) | low_side_out | NEXUSS3-A-9 | DPO 1 | low_side_out | single_source | |
| OEM-A35-13 | EFI main relay 1 (SSHUT) | low_side_out | NEXUSS3-A-26 | ECR output | low_side_out | single_source | |
| OEM-A35-15 | Tachometer output (TACH) | tacho_out | — | — | — | single_source | |
| OEM-A35-17 | ETCS relay (MCR) | low_side_out | NEXUSS3-A-15 | DPO 4 | low_side_out | single_source | |
| OEM-A35-19 | Fuel pump control (FPC) | low_side_out | — | — | — | single_source | |
| OEM-A35-20 | Canister pressure sensor (PPMP) | analog_in | — | — | — | single_source | |
| OEM-A35-21 | Accelerator pedal 5V supply (VCPA) | vref | NEXUSS3-C-25 | +5V | vref | single_source | |
| OEM-A35-22 | Accelerator pedal 5V supply (VCP2) | vref | NEXUSS3-C-25 | +5V | vref | single_source | |
| OEM-A35-23 | Accelerator pedal position (VPA) | analog_in | NEXUSS3-C-14 | AVI 5 | analog_in | single_source | |
| OEM-A35-26 | Starter signal (STA) | digital_in | — | — | — | single_source | |
| OEM-A35-29 | Accelerator pedal ground (EPA) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-A35-30 | Accelerator pedal ground (EPA2) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-A35-31 | Accelerator pedal position 2 (VPA2) | analog_in | NEXUSS3-C-12 | AVI 3 | analog_in | single_source | |
| OEM-A35-35 | A/C clutch relay (AC) | low_side_out | NEXUSS3-A-16 | DPO 5 | low_side_out | single_source | |
| OEM-A35-5 | Injector relay (IREL) | low_side_out | NEXUSS3-A-17 | DPO 6 | low_side_out | single_source | |
| OEM-A35-7 | ETCS relay (+BM) | low_side_out | NEXUSS3-A-21 | HBO 3 | hbridge_out | single_source | |
| OEM-A35-8 | Leak detection pump (MPMP) | low_side_out | — | — | — | single_source | |
| OEM-A36-1 | Throttle actuator motor - (M-) | hbridge_out | NEXUSS3-A-19 | HBO 1 | hbridge_out | single_source | |
| OEM-A36-10 | Ignition coil 2 (IGT2) | ignition_out | NEXUSS3-A-28 | Ignition 2 | ignition_out | single_source | |
| OEM-A36-11 | Purge valve (PRG) | low_side_out | — | — | — | single_source | |
| OEM-A36-12 | Injector 1 port (#10) | injector_out | NEXUSS3-A-1 | Injector 1 | injector_out | single_source | |
| OEM-A36-13 | Injector 4 port (#40) | injector_out | NEXUSS3-A-7 | Injector 7 | injector_out | single_source | |
| OEM-A36-14 | Injector 1 direct (#1) | injector_out | NEXUSS3-A-2 | Injector 2 | injector_out | single_source | |
| OEM-A36-16 | OCV intake bank 2 (OC2) | low_side_out | — | — | — | single_source | |
| OEM-A36-17 | OCV intake bank 1 (OC1) | low_side_out | — | — | — | single_source | |
| OEM-A36-18 | Throttle position (VTA1) | analog_in | NEXUSS3-C-15 | AVI 6 | analog_in | single_source | |
| OEM-A36-19 | Sensor 5V supply (VC) | vref | NEXUSS3-C-25 | +5V | vref | single_source | |
| OEM-A36-2 | Throttle actuator motor + (M+) | hbridge_out | NEXUSS3-A-20 | HBO 2 | hbridge_out | single_source | |
| OEM-A36-20 | Oil temperature (OT) | temp_in | NEXUSS3-C-27 | AVI 10 | analog_in | single_source | |
| OEM-A36-21 | Ignition coil 1 (IGT1) | ignition_out | NEXUSS3-A-27 | Ignition 1 | ignition_out | single_source | |
| OEM-A36-22 | Injector 2 port (#20) | injector_out | NEXUSS3-A-3 | Injector 3 | injector_out | single_source | |
| OEM-A36-23 | Injector 4 direct (#4) | injector_out | NEXUSS3-A-8 | Injector 8 | injector_out | single_source | |
| OEM-A36-24 | Injector 3 direct (#3) | injector_out | NEXUSS3-A-5 | Injector 5 | injector_out | single_source | |
| OEM-A36-25 | Injector 2 direct (#2) | injector_out | NEXUSS3-A-4 | Injector 4 | injector_out | single_source | |
| OEM-A36-28 | Throttle position 2 (VTA2) | analog_in | NEXUSS3-C-13 | AVI 4 | analog_in | single_source | |
| OEM-A36-29 | Sensor ground (E1) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-A36-3 | Power ground (E02) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-A36-30 | Engine coolant temperature (THW) | temp_in | NEXUSS3-C-17 | AVI 8 | analog_in | single_source | |
| OEM-A36-31 | Ignition coil 3 (IGT3) | ignition_out | NEXUSS3-A-29 | Ignition 3 | ignition_out | single_source | |
| OEM-A36-32 | Injector 3 port (#30) | injector_out | NEXUSS3-A-6 | Injector 6 | injector_out | single_source | |
| OEM-A36-4 | Power ground (E01) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-A36-5 | OCV exhaust bank 2 (OE2) | low_side_out | — | — | — | single_source | |
| OEM-A36-6 | Heated oxygen sensor heater (HT1B) | low_side_out | NEXUSS3-A-22 | HBO 4 | hbridge_out | single_source | |
| OEM-A36-7 | OCV exhaust bank 1 (OE1) | low_side_out | — | — | — | single_source | |
| OEM-A36-8 | Ignition coil 4 (IGT4) | ignition_out | NEXUSS3-A-30 | Ignition 4 | ignition_out | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-A33-1 | SP-14V-1 | 0.85 | no route | ECU power (+B2, main relay) | — | |
| W2 | OEM-A34-6 | SP-14V-1 | 0.85 | no route | ECU power (+B, main relay) | — | |
| 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-A33-4 | SP-GND-1 | 0.85 | no route | Power ground (EC) | — | |
| W6 | OEM-A34-1 | SP-GND-1 | 0.85 | no route | Power ground (E03) | — | |
| W7 | OEM-A34-2 | SP-GND-1 | 0.85 | no route | Power ground (E04) | — | |
| W8 | OEM-A34-3 | SP-GND-1 | 0.85 | no route | Power ground (E05) | — | |
| W9 | OEM-A36-3 | SP-GND-1 | 0.85 | no route | Power ground (E02) | — | |
| W10 | OEM-A36-4 | SP-GND-1 | 0.85 | no route | Power ground (E01) | — | |
| W11 | SP-GND-1 | NEXUSS3-A-10 | 0.85 | no route | Battery ground | — | |
| W12 | SP-GND-1 | NEXUSS3-A-11 | 0.85 | no route | Battery ground | — | |
| W13 | OEM-A33-29 | SP-0V-1 | 0.5 | no route | MAF sensor ground (E2G) | — | |
| W14 | OEM-A34-27 | SP-0V-1 | 0.5 | no route | Crank position return (NE-) | — | |
| W15 | OEM-A35-29 | SP-0V-1 | 0.5 | no route | Accelerator pedal ground (EPA) | — | |
| W16 | OEM-A35-30 | SP-0V-1 | 0.5 | no route | Accelerator pedal ground (EPA2) | — | |
| W17 | OEM-A36-29 | SP-0V-1 | 0.5 | no route | Sensor ground (E1) | — | |
| W18 | SP-0V-1 | NEXUSS3-C-26 | 0.5 | no route | Signal ground | — | |
| W19 | OEM-A34-34 | SP-5V1-1 | 0.5 | no route | OCV power source (VCV, 5V) | — | |
| W20 | OEM-A35-21 | SP-5V1-1 | 0.5 | no route | Accelerator pedal 5V supply (VCPA) | — | |
| W21 | OEM-A35-22 | SP-5V1-1 | 0.5 | no route | Accelerator pedal 5V supply (VCP2) | — | |
| W22 | OEM-A36-19 | SP-5V1-1 | 0.5 | no route | Sensor 5V supply (VC) | — | |
| W23 | SP-5V1-1 | NEXUSS3-C-25 | 0.5 | no route | +5V | — | |
| W24 | OEM-A34-16 | NEXUSS3-C-1 | 0.5 | no route | Crank position (NE+) | — | |
| W25 | SP-0V-1 | NEXUSS3-C-2 | 0.5 | no route | Trigger - | — | |
| W26 | OEM-A34-14 | NEXUSS3-C-3 | 0.5 | no route | VVT cam sensor exhaust bank 1 (EV1+) | — | |
| W27 | SP-0V-1 | NEXUSS3-C-4 | 0.5 | no route | Home - | — | |
| W28 | OEM-A34-26 | NEXUSS3-C-5 | 0.5 | no route | VVT cam sensor intake bank 1 (VV1+) | — | |
| W29 | OEM-A34-25 | NEXUSS3-C-6 | 0.5 | no route | VVT cam sensor exhaust bank 2 (EV2+) | — | |
| W30 | OEM-A34-15 | NEXUSS3-C-7 | 0.5 | no route | VVT cam sensor intake bank 2 (VV2+) | — | |
| W31 | OEM-A34-28 | NEXUSS3-C-23 | 0.5 | no route | Knock sensor 1 (KNK1) | — | |
| W32 | OEM-A34-17 | NEXUSS3-C-24 | 0.5 | no route | Knock sensor 2 (KNK2) | — | |
| W33 | OEM-A36-21 | NEXUSS3-A-27 | 0.5 | no route | Ignition coil 1 (IGT1) | — | |
| W34 | OEM-A36-10 | NEXUSS3-A-28 | 0.5 | no route | Ignition coil 2 (IGT2) | — | |
| W35 | OEM-A36-31 | NEXUSS3-A-29 | 0.5 | no route | Ignition coil 3 (IGT3) | — | |
| W36 | OEM-A36-8 | NEXUSS3-A-30 | 0.5 | no route | Ignition coil 4 (IGT4) | — | |
| W37 | OEM-A36-12 | NEXUSS3-A-1 | 0.5 | no route | Injector 1 port (#10) | — | |
| W38 | OEM-A36-14 | NEXUSS3-A-2 | 0.5 | no route | Injector 1 direct (#1) | — | |
| W39 | OEM-A36-22 | NEXUSS3-A-3 | 0.5 | no route | Injector 2 port (#20) | — | |
| W40 | OEM-A36-25 | NEXUSS3-A-4 | 0.5 | no route | Injector 2 direct (#2) | — | |
| W41 | OEM-A36-24 | NEXUSS3-A-5 | 0.5 | no route | Injector 3 direct (#3) | — | |
| W42 | OEM-A36-32 | NEXUSS3-A-6 | 0.5 | no route | Injector 3 port (#30) | — | |
| W43 | OEM-A36-13 | NEXUSS3-A-7 | 0.5 | no route | Injector 4 port (#40) | — | |
| W44 | OEM-A36-23 | NEXUSS3-A-8 | 0.5 | no route | Injector 4 direct (#4) | — | |
| W45 | OEM-A33-27 | NEXUSS3-A-13 | 0.5 | no route | Ignition switch sense (IGSW, IG2 relay) | — | |
| W46 | OEM-A36-1 | NEXUSS3-A-19 | 0.5 | no route | Throttle actuator motor - (M-) | — | |
| W47 | OEM-A36-2 | NEXUSS3-A-20 | 0.5 | no route | Throttle actuator motor + (M+) | — | |
| W48 | OEM-A35-13 | NEXUSS3-A-26 | 0.5 | no route | EFI main relay 1 (SSHUT) | — | |
| W49 | OEM-A35-12 | NEXUSS3-A-9 | 0.5 | no route | Cooling fan relay 2 (FAN2) | — | |
| W50 | OEM-A35-11 | NEXUSS3-A-12 | 0.5 | no route | Cooling fan relay 3 (FAN1) | — | |
| W51 | OEM-A33-20 | NEXUSS3-A-14 | 0.5 | no route | Blower relay (HB) | — | |
| W52 | OEM-A35-17 | NEXUSS3-A-15 | 0.5 | no route | ETCS relay (MCR) | — | |
| W53 | OEM-A35-35 | NEXUSS3-A-16 | 0.5 | no route | A/C clutch relay (AC) | — | |
| W54 | OEM-A35-5 | NEXUSS3-A-17 | 0.5 | no route | Injector relay (IREL) | — | |
| W55 | OEM-A35-7 | NEXUSS3-A-21 | 0.5 | no route | ETCS relay (+BM) | — | |
| W56 | OEM-A34-5 | NEXUSS3-C-33 | 0.5 | no route | A/F ratio sensor heater (HA1A) | — | |
| W57 | OEM-A36-6 | NEXUSS3-A-22 | 0.5 | no route | Heated oxygen sensor heater (HT1B) | — | |
| W58 | OEM-A33-22 | NEXUSS3-C-10 | 0.5 | no route | Mass air flow (VG) | — | |
| W59 | OEM-A34-20 | NEXUSS3-C-11 | 0.5 | no route | Manifold absolute pressure (PIM) | — | |
| W60 | OEM-A35-31 | NEXUSS3-C-12 | 0.5 | no route | Accelerator pedal position 2 (VPA2) | — | |
| W61 | OEM-A36-28 | NEXUSS3-C-13 | 0.5 | no route | Throttle position 2 (VTA2) | — | |
| W62 | OEM-A35-23 | NEXUSS3-C-14 | 0.5 | no route | Accelerator pedal position (VPA) | — | |
| W63 | OEM-A36-18 | NEXUSS3-C-15 | 0.5 | no route | Throttle position (VTA1) | — | |
| W64 | OEM-A34-21 | NEXUSS3-C-16 | 0.5 | no route | Heated oxygen sensor (OX1B, rear) | — | |
| W65 | OEM-A36-30 | NEXUSS3-C-17 | 0.5 | no route | Engine coolant temperature (THW) | — | |
| W66 | OEM-A33-12 | NEXUSS3-C-18 | 0.5 | no route | Intake air temperature (THA, in MAF) | — | |
| W67 | OEM-A36-20 | NEXUSS3-C-27 | 0.5 | no route | Oil temperature (OT) | — | |
| W68 | OEM-A33-8 | NEXUSS3-C-28 | 0.5 | no route | A/C pressure sensor (ACP) | — | |
| W69 | OEM-A33-14 | NEXUSS3-C-8 | 0.5 | no route | Starter signal (STSW2) | — | |
| W70 | OEM-A33-15 | NEXUSS3-C-19 | 0.5 | no route | Clutch switch (CLSW) | — | |
| W71 | OEM-A33-16 | NEXUSS3-C-20 | 0.5 | no route | Neutral switch (NSW) | — | |
| W72 | OEM-A33-19 | NEXUSS3-A-23 | 0.5 | no route | CAN high (CANH) | — | |
| W73 | OEM-A33-18 | NEXUSS3-A-24 | 0.5 | no route | CAN low (CANL) | — |
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 |
|---|---|---|---|
| error | DBW_SENSOR_INPUT | tps | Only 1 throttle-position track(s) found. An electronic throttle needs two (main and sub) so the ECU can cross-check them. |
| warn | DBW_MOTOR_CURRENT | NEXUSS3-A-19 | Cannot confirm Nexus S3 can drive the throttle motor: NEXUSS3-A-19 "HBO 1" is rated 8.0 A, but the motor current at OEM-A36-1 is unknown. Add the motor's peak current from a source, or measure the motor resistance: peak ≈ 14 V ÷ R (Hondata measured 4.9 A for a Civic Si body, 10.4 A for a ZDX body; holding current is about 1 A). |
| warn | DBW_MOTOR_CURRENT | NEXUSS3-A-20 | Cannot confirm Nexus S3 can drive the throttle motor: NEXUSS3-A-20 "HBO 2" is rated 8.0 A, but the motor current at OEM-A36-2 is unknown. Add the motor's peak current from a source, or measure the motor resistance: peak ≈ 14 V ÷ R (Hondata measured 4.9 A for a Civic Si body, 10.4 A for a ZDX body; holding current is about 1 A). |
| warn | LOAD_UNKNOWN | NEXUSS3-A-26 | NEXUSS3-A-26 "ECR output" drives OEM-A35-13 EFI main relay 1 (SSHUT) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | NET_FAMILY | OEM-A34-15 ↔ NEXUSS3-C-7 | OEM-A34-15 "VVT cam sensor intake bank 2 (VV2+)" [trigger_in] is wired to NEXUSS3-C-7 "SPI 3" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| warn | NET_FAMILY | OEM-A34-25 ↔ NEXUSS3-C-6 | OEM-A34-25 "VVT cam sensor exhaust bank 2 (EV2+)" [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-A34-26 ↔ NEXUSS3-C-5 | OEM-A34-26 "VVT cam sensor intake bank 1 (VV1+)" [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-A35-7 ↔ NEXUSS3-A-21 | OEM-A35-7 "ETCS relay (+BM)" [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-A36-6 ↔ NEXUSS3-A-22 | OEM-A36-6 "Heated oxygen sensor heater (HT1B)" [low_side_out] is wired to NEXUSS3-A-22 "HBO 4" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NO_FUEL_PUMP | fuel pump | This engine harness has no fuel-pump control path: no fuel-pump relay output is wired to the new ECU. If the stock car switches the pump outside the ECU (an airflow-meter contact or a separate module), the standalone must drive the pump relay itself — see the install notes for this car. |
| info | NET_FAMILY | NEXUSS3-C-26 ↔ NEXUSS3-C-4 | NEXUSS3-C-26 "Signal ground" [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-A33-12 ↔ NEXUSS3-C-18 | OEM-A33-12 "Intake air temperature (THA, in MAF)" [temp_in] is wired to NEXUSS3-C-18 "AVI 9" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-A36-20 ↔ NEXUSS3-C-27 | OEM-A36-20 "Oil temperature (OT)" [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-A36-30 ↔ NEXUSS3-C-17 | OEM-A36-30 "Engine coolant temperature (THW)" [temp_in] is wired to NEXUSS3-C-17 "AVI 8" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | UNMAPPED | OEM | 26 optional OEM pins are not mapped: OEM-A33-17 Starter signal (STSW2); OEM-A33-28 Shield ground (SLE2); OEM-A33-3 Stop light switch (ST1-); OEM-A33-7 Stop light switch (STP); OEM-A34-11 DI injector confirmation (IJF1); OEM-A34-13 High-pressure fuel pump spill valve (FPF); OEM-A34-18 A/F ratio sensor (A1A-); OEM-A34-19 A/F ratio sensor (A1A+); OEM-A34-29 Shield ground (EKNK); OEM-A34-30 Shield ground (SLE1); OEM-A34-31 DI injector confirmation (IJF2); OEM-A34-32 High-pressure fuel pump spill valve (FPD); OEM-A34-35 Shield ground (SLE3); OEM-A34-9 Fuel pressure sensor (PR); OEM-A35-1 Canister vent valve (VPMP); OEM-A35-10 Fuel pump control monitor (DI); OEM-A35-15 Tachometer output (TACH); OEM-A35-19 Fuel pump control (FPC); OEM-A35-20 Canister pressure sensor (PPMP); OEM-A35-26 Starter signal (STA); OEM-A35-8 Leak detection pump (MPMP); OEM-A36-11 Purge valve (PRG); OEM-A36-16 OCV intake bank 2 (OC2); OEM-A36-17 OCV intake bank 1 (OC1); OEM-A36-5 OCV exhaust bank 2 (OE2); OEM-A36-7 OCV exhaust bank 1 (OE1) |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-A33-2 | 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 2026-10-09. Review every wire against both manuals before building. Not wired: - OEM-A33 2: Battery constant (BATT, memory): Haltech Nexus S3 has no battery-constant input; not needed - OEM-A33 28: Shield ground (SLE2): no shield pin on Haltech Nexus S3 - OEM-A34 29: Shield ground (EKNK): no shield pin on Haltech Nexus S3 - OEM-A34 30: Shield ground (SLE1): no shield pin on Haltech Nexus S3 - OEM-A34 35: Shield ground (SLE3): no shield pin on Haltech Nexus S3 - OEM-A36 17: OCV intake bank 1 (OC1): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-A36 7: OCV exhaust bank 1 (OE1): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-A36 16: OCV intake bank 2 (OC2): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-A36 5: OCV exhaust bank 2 (OE2): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-A34 13: High-pressure fuel pump spill valve (FPF): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-A34 32: High-pressure fuel pump spill valve (FPD): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-A35 1: Canister vent valve (VPMP): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-A35 19: Fuel pump control (FPC): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-A35 8: Leak detection pump (MPMP): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-A36 11: Purge valve (PRG): no free low_side/ls_hs/injector/hbridge on Haltech Nexus S3 - OEM-A35 15: Tachometer output (TACH): no free tacho/frequency_out/low_side/ls_hs on Haltech Nexus S3 - OEM-A34 11: DI injector confirmation (IJF1): no free analog_0_5 on Haltech Nexus S3 - OEM-A34 31: DI injector confirmation (IJF2): no free analog_0_5 on Haltech Nexus S3 - OEM-A34 9: Fuel pressure sensor (PR): no free analog_0_5 on Haltech Nexus S3 - OEM-A35 10: Fuel pump control monitor (DI): no free analog_0_5 on Haltech Nexus S3 - OEM-A35 20: Canister pressure sensor (PPMP): no free analog_0_5 on Haltech Nexus S3 - OEM-A33 17: Starter signal (STSW2): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-A33 3: Stop light switch (ST1-): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-A33 7: Stop light switch (STP): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-A35 26: Starter signal (STA): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-A34 18: A/F ratio sensor (A1A-): not classified in the library; wire by hand - OEM-A34 19: A/F ratio sensor (A1A+): not classified in the library; wire by hand
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 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 |
| 4 | vendor_doc | Scion FR-S / Toyota 86 Repair Manual (2013) — FA20 ECM terminal pinout (SFI system) | https://gt86.me/images/0/09/2013_Scion_FR-S_Repair_Manual.pdf | — | — | — |