Toyota Supra A80 1997-2002 JDM (2JZ-GTE VVT-i, single-turbo) → Haltech Nexus S3 HT-213000 (auto)
Toyota Supra A80 1997-2002 JDM (2JZ-GTE VVT-i, single-turbo) — 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 | 2: read the Findings page before cutting any wire |
| Size of the job | 60 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-B78-16 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-B78-7 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-B78-8 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-14V-1 | NEXUSS3-A-18 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | SP-14V-1 | NEXUSS3-A-25 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-B74-21 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-B74-31 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-B74-9 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-B75-17 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-GND-1 | NEXUSS3-A-10 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-GND-1 | NEXUSS3-A-11 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-B74-22 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-B75-18 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-B75-19 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-B78-22 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | SP-0V-1 | NEXUSS3-C-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-B75-2 | NEXUSS3-C-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-B74-23 | NEXUSS3-C-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | SP-0V-1 | NEXUSS3-C-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-B74-10 | NEXUSS3-C-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | SP-0V-1 | NEXUSS3-C-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-B74-28 | NEXUSS3-C-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-B74-27 | NEXUSS3-C-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-B74-11 | NEXUSS3-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-B74-12 | NEXUSS3-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-B74-13 | NEXUSS3-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-B75-5 | NEXUSS3-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-B75-6 | NEXUSS3-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-B74-1 | NEXUSS3-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-B74-2 | NEXUSS3-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-B74-3 | NEXUSS3-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-B74-4 | NEXUSS3-A-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-B78-9 | NEXUSS3-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-B74-17 | NEXUSS3-A-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-B74-18 | NEXUSS3-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-B74-19 | NEXUSS3-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-B74-20 | NEXUSS3-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-B75-9 | NEXUSS3-C-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-B75-15 | NEXUSS3-C-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-B75-23 | NEXUSS3-C-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-B75-16 | NEXUSS3-C-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-B75-24 | NEXUSS3-C-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-B75-14 | NEXUSS3-C-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-B77-13 | NEXUSS3-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-B78-10 | NEXUSS3-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-B75-4 | NEXUSS3-C-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-B76-1 | NEXUSS3-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-B76-2 | NEXUSS3-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-B76-3 | NEXUSS3-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-B75-10 | NEXUSS3-C-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-B75-12 | NEXUSS3-C-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-B75-22 | NEXUSS3-C-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-B76-17 | NEXUSS3-C-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-B77-25 | NEXUSS3-C-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-B76-11 | NEXUSS3-C-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-B76-5 | NEXUSS3-C-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-B74-25 | NEXUSS3-C-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-B76-10 | NEXUSS3-C-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-B76-4 | NEXUSS3-C-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-B75-21 | 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-10 | NEXUSS3-A-18 | open (OL) | power ground must not touch +12 V supply | |
| 2 | NEXUSS3-A-10 | NEXUSS3-C-25 | open (OL) | power ground must not touch 5 V sensor reference | |
| 3 | NEXUSS3-C-2 | NEXUSS3-A-18 | open (OL) | sensor ground must not touch +12 V supply | |
| 4 | NEXUSS3-C-2 | NEXUSS3-C-25 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 5 | NEXUSS3-C-25 | NEXUSS3-A-18 | open (OL) | 5 V sensor reference must not touch +12 V supply |
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 | — | W27 | — | 0.5 | OEM-B75-5 | — | — | — |
| 10 | Battery ground | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | Battery ground | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| 12 | DPO 2 | — | W35 | — | 0.5 | OEM-B74-18 | — | — | — |
| 13 | Ignition switch input | — | W33 | — | 0.5 | OEM-B78-9 | — | — | — |
| 14 | DPO 3 | — | W36 | — | 0.5 | OEM-B74-19 | — | — | — |
| 15 | DPO 4 | — | W37 | — | 0.5 | OEM-B74-20 | — | — | — |
| 16 | DPO 5 | — | W45 | — | 0.5 | OEM-B78-10 | — | — | — |
| 17 | DPO 6 | — | W47 | — | 0.5 | OEM-B76-1 | — | — | — |
| 18 | +12V switched input | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 19 | HBO 1 | — | — | — | — | — | — | — | — |
| 2 | Injector 2 | — | W28 | — | 0.5 | OEM-B75-6 | — | — | — |
| 20 | HBO 2 | — | — | — | — | — | — | — | — |
| 21 | HBO 3 | — | — | — | — | — | — | — | — |
| 22 | HBO 4 | — | — | — | — | — | — | — | — |
| 23 | CAN 1 High | — | — | — | — | — | — | — | — |
| 24 | CAN 1 Low | — | — | — | — | — | — | — | — |
| 25 | +12V switched input | — | W5 | — | 0.85 | SP-14V-1 | — | — | — |
| 26 | ECR output | — | W44 | — | 0.5 | OEM-B77-13 | — | — | — |
| 27 | Ignition 1 | — | W24 | — | 0.5 | OEM-B74-11 | — | — | — |
| 28 | Ignition 2 | — | W25 | — | 0.5 | OEM-B74-12 | — | — | — |
| 29 | Ignition 3 | — | W26 | — | 0.5 | OEM-B74-13 | — | — | — |
| 3 | Injector 3 | — | W29 | — | 0.5 | OEM-B74-1 | — | — | — |
| 30 | Ignition 4 | — | — | — | — | — | — | — | — |
| 31 | Ignition 5 | — | — | — | — | — | — | — | — |
| 32 | Ignition 6 | — | — | — | — | — | — | — | — |
| 33 | Ignition 7 | — | — | — | — | — | — | — | — |
| 34 | Ignition 8 | — | — | — | — | — | — | — | — |
| 4 | Injector 4 | — | W30 | — | 0.5 | OEM-B74-2 | — | — | — |
| 5 | Injector 5 | — | W31 | — | 0.5 | OEM-B74-3 | — | — | — |
| 6 | Injector 6 | — | W32 | — | 0.5 | OEM-B74-4 | — | — | — |
| 7 | Injector 7 | — | W48 | — | 0.5 | OEM-B76-2 | — | — | — |
| 8 | Injector 8 | — | W49 | — | 0.5 | OEM-B76-3 | — | — | — |
| 9 | DPO 1 | — | W34 | — | 0.5 | OEM-B74-17 | — | — | — |
NEXUSS3-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Trigger + | — | W18 | — | 0.5 | OEM-B74-23 | — | — | — |
| 10 | AVI 1 | — | W38 | — | 0.5 | OEM-B75-9 | — | — | — |
| 11 | AVI 2 | — | W39 | — | 0.5 | OEM-B75-15 | — | — | — |
| 12 | AVI 3 | — | W40 | — | 0.5 | OEM-B75-23 | — | — | — |
| 13 | AVI 4 | — | W41 | — | 0.5 | OEM-B75-16 | — | — | — |
| 14 | AVI 5 | — | W42 | — | 0.5 | OEM-B75-24 | — | — | — |
| 15 | AVI 6 | — | W43 | — | 0.5 | OEM-B75-14 | — | — | — |
| 16 | AVI 7 | — | W50 | — | 0.5 | OEM-B75-10 | — | — | — |
| 17 | AVI 8 | — | W51 | — | 0.5 | OEM-B75-12 | — | — | — |
| 18 | AVI 9 | — | W52 | — | 0.5 | OEM-B75-22 | — | — | — |
| 19 | SPI 5 | — | W58 | — | 0.5 | OEM-B76-10 | — | — | — |
| 2 | Trigger - | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 20 | SPI 6 | — | W59 | — | 0.5 | OEM-B76-4 | — | — | — |
| 21 | CAN 2 High | — | — | — | — | — | — | — | — |
| 22 | CAN 2 Low | — | — | — | — | — | — | — | — |
| 23 | Knock 1 | — | W22 | — | 0.5 | OEM-B74-28 | — | — | — |
| 24 | Knock 2 | — | W23 | — | 0.5 | OEM-B74-27 | — | — | — |
| 25 | +5V | — | W17 | — | 0.5 | OEM-B75-2 | — | — | — |
| 26 | Signal ground | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 27 | AVI 10 | — | W53 | — | 0.5 | OEM-B76-17 | — | — | — |
| 28 | AVI 11 | — | W60 | — | 0.5 | OEM-B75-21 | — | — | — |
| 29 | WBI 1 Heater + | — | — | — | — | — | — | — | — |
| 3 | Home + | — | W20 | — | 0.5 | OEM-B74-10 | — | — | — |
| 30 | WBI 1 Input | — | — | — | — | — | — | — | — |
| 31 | WBI 1 Pump | — | — | — | — | — | — | — | — |
| 32 | WBI 1 Nernst | — | — | — | — | — | — | — | — |
| 33 | WBI 1 Heater - | — | W46 | — | 0.5 | OEM-B75-4 | — | — | — |
| 34 | WBI 1 Cal | — | — | — | — | — | — | — | — |
| 4 | Home - | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 5 | SPI 1 | — | W54 | — | 0.5 | OEM-B77-25 | — | — | — |
| 6 | SPI 2 | — | W55 | — | 0.5 | OEM-B76-11 | — | — | — |
| 7 | SPI 3 | — | W56 | — | 0.5 | OEM-B76-5 | — | — | — |
| 8 | SPI 4 | — | W57 | — | 0.5 | OEM-B74-25 | — | — | — |
| 9 | +8V | — | — | — | — | — | — | — | — |
OEM-B74
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 3 (#30) | — | W29 | — | 0.5 | NEXUSS3-A-3 | — | — | — |
| 10 | Cam position (G2) | — | W20 | — | 0.5 | NEXUSS3-C-3 | — | — | — |
| 11 | Ignition 1 (IGT, cyl 1&6) | — | W24 | — | 0.5 | NEXUSS3-A-27 | — | — | — |
| 12 | Ignition 2 (IGT2, cyl 5&2) | — | W25 | — | 0.5 | NEXUSS3-A-28 | — | — | — |
| 13 | Ignition 3 (IGT3, cyl 3&4) | — | W26 | — | 0.5 | NEXUSS3-A-29 | — | — | — |
| 15 | Wastegate VSV (PMC) | — | — | — | — | — | — | — | — |
| 17 | VVT-i OCV - (OCV-) | — | W34 | — | 0.5 | NEXUSS3-A-9 | — | — | — |
| 18 | VVT-i OCV + (OCV+) | — | W35 | — | 0.5 | NEXUSS3-A-12 | — | — | — |
| 19 | ETCS-i clutch - (CL-) | — | W36 | — | 0.5 | NEXUSS3-A-14 | — | — | — |
| 2 | Injector 4 (#40) | — | W30 | — | 0.5 | NEXUSS3-A-4 | — | — | — |
| 20 | ETCS-i clutch + (CL+) | — | W37 | — | 0.5 | NEXUSS3-A-15 | — | — | — |
| 21 | Power ground (E01) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 22 | Crank/cam sensor return (NE-) | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 23 | Crank position (NE+) | — | W18 | — | 0.5 | NEXUSS3-C-1 | — | — | — |
| 24 | Neutral/park switch (NSW) | — | — | — | — | — | — | — | — |
| 25 | Igniter verification (IGF) | — | W57 | — | 0.5 | NEXUSS3-C-8 | — | — | — |
| 27 | Knock sensor 2 (KNK2, rear) | — | W23 | — | 0.5 | NEXUSS3-C-24 | — | — | — |
| 28 | Knock sensor 1 (KNK1, front) | — | W22 | — | 0.5 | NEXUSS3-C-23 | — | — | — |
| 3 | Injector 5 (#50) | — | W31 | — | 0.5 | NEXUSS3-A-5 | — | — | — |
| 30 | ETCS-i motor shield (GEO1) | — | — | — | — | — | — | — | — |
| 31 | Power ground (E02) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 4 | Injector 6 (#60) | — | W32 | — | 0.5 | NEXUSS3-A-6 | — | — | — |
| 5 | Intake air bypass VSV (VSV1) | — | — | — | — | — | — | — | — |
| 7 | ETCS-i motor - (M-) | — | — | — | — | — | — | — | — |
| 8 | ETCS-i motor + (M+) | — | — | — | — | — | — | — | — |
| 9 | ETCS-i ground (ME01) | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
OEM-B75
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | Mass air flow (VG) | — | W50 | — | 0.5 | NEXUSS3-C-16 | — | — | — |
| 12 | O2 sensor (OX) | — | W51 | — | 0.5 | NEXUSS3-C-17 | — | — | — |
| 14 | Coolant temperature (THW) | — | W43 | — | 0.5 | NEXUSS3-C-15 | — | — | — |
| 15 | Accelerator pedal 1 (VPA) | — | W39 | — | 0.5 | NEXUSS3-C-11 | — | — | — |
| 16 | Accelerator pedal 2 (VPA2) | — | W41 | — | 0.5 | NEXUSS3-C-13 | — | — | — |
| 17 | Power ground (E1) | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 18 | Sensor ground (E2) | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | MAF ground (EVG) | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | Sensor power (VC) | — | W17 | — | 0.5 | NEXUSS3-C-25 | — | — | — |
| 20 | A/T 2nd-gear indicator (2) | — | — | — | — | — | — | — | — |
| 21 | A/T 1st-gear indicator (L) | — | W60 | — | 0.5 | NEXUSS3-C-28 | — | — | — |
| 22 | Intake air temperature (THA) | — | W52 | — | 0.5 | NEXUSS3-C-18 | — | — | — |
| 23 | Throttle position 1 (VTA) | — | W40 | — | 0.5 | NEXUSS3-C-12 | — | — | — |
| 24 | Throttle position 2 (VTA2) | — | W42 | — | 0.5 | NEXUSS3-C-14 | — | — | — |
| 3 | Exhaust gas control VSV (VSV2) | — | — | — | — | — | — | — | — |
| 4 | O2 sensor heater (HT) | — | W46 | — | 0.5 | NEXUSS3-C-33 | — | — | — |
| 5 | Injector 1 (#10) | — | W27 | — | 0.5 | NEXUSS3-A-1 | — | — | — |
| 6 | Injector 2 (#20) | — | W28 | — | 0.5 | NEXUSS3-A-2 | — | — | — |
| 7 | EVAP purge VSV (PRG) | — | — | — | — | — | — | — | — |
| 8 | Main oil pressure switch (MOPS) | — | — | — | — | — | — | — | — |
| 9 | Manifold pressure (PIM) | — | W38 | — | 0.5 | NEXUSS3-C-10 | — | — | — |
OEM-B76
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | A/T shift solenoid 1 (S1) | — | W47 | — | 0.5 | NEXUSS3-A-17 | — | — | — |
| 10 | OD direct-clutch speed (NCO-) | — | W58 | — | 0.5 | NEXUSS3-C-19 | — | — | — |
| 11 | No.2 speed sensor return (SP2-) | — | W55 | — | 0.5 | NEXUSS3-C-6 | — | — | — |
| 12 | Exhaust bypass VSV (VSV3) | — | — | — | — | — | — | — | — |
| 13 | A/T lock-up solenoid - (SLU-) | — | — | — | — | — | — | — | — |
| 14 | A/T accumulator solenoid - (SLN-) | — | — | — | — | — | — | — | — |
| 15 | A/T line-pressure solenoid - (SLT-) | — | — | — | — | — | — | — | — |
| 16 | Fuel pressure-up VSV (FPU) | — | — | — | — | — | — | — | — |
| 17 | A/T oil temperature (OIL) | — | W53 | — | 0.5 | NEXUSS3-C-27 | — | — | — |
| 2 | A/T shift solenoid 2 (S2) | — | W48 | — | 0.5 | NEXUSS3-A-7 | — | — | — |
| 3 | A/T shift solenoid 3 (S3) | — | W49 | — | 0.5 | NEXUSS3-A-8 | — | — | — |
| 4 | OD direct-clutch speed (NCO+) | — | W59 | — | 0.5 | NEXUSS3-C-20 | — | — | — |
| 5 | No.2 speed sensor (SP2+) | — | W56 | — | 0.5 | NEXUSS3-C-7 | — | — | — |
| 6 | A/T shift solenoid 4 (S4) | — | — | — | — | — | — | — | — |
| 7 | A/T lock-up solenoid + (SLU+) | — | — | — | — | — | — | — | — |
| 8 | A/T accumulator solenoid + (SLN+) | — | — | — | — | — | — | — | — |
| 9 | A/T line-pressure solenoid + (SLT+) | — | — | — | — | — | — | — | — |
OEM-B77
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | A/C request (AC) | — | — | — | — | — | — | — | — |
| 13 | A/C clutch relay (ACMG) | — | W44 | — | 0.5 | NEXUSS3-A-26 | — | — | — |
| 14 | A/T shift down (SFTD) | — | — | — | — | — | — | — | — |
| 16 | A/T reverse indicator (R) | — | — | — | — | — | — | — | — |
| 18 | Rear right wheel speed (RRO) | — | — | — | — | — | — | — | — |
| 19 | Rear left wheel speed (RLO) | — | — | — | — | — | — | — | — |
| 2 | Starter signal (STA) | — | — | — | — | — | — | — | — |
| 20 | Tachometer output (TACH) | — | — | — | — | — | — | — | — |
| 21 | ABS active (ABS) | — | — | — | — | — | — | — | — |
| 25 | No.1 speed sensor (SPD) | — | W54 | — | 0.5 | NEXUSS3-C-5 | — | — | — |
| 26 | Electrical load sense (ELS) | — | — | — | — | — | — | — | — |
| 27 | Road speed (RSPD) | — | — | — | — | — | — | — | — |
| 4 | A/T shift up (SFTU) | — | — | — | — | — | — | — | — |
| 5 | Diagnostic/timing check (TC) | — | — | — | — | — | — | — | — |
| 6 | Stop light switch (STP) | — | — | — | — | — | — | — | — |
| 7 | A/T manual position (3) | — | — | — | — | — | — | — | — |
OEM-B78
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Battery constant (BATT) | — | — | — | — | — | — | — | — |
| 10 | EFI main relay control (M-REL) | — | W45 | — | 0.5 | NEXUSS3-A-16 | — | — | — |
| 11 | Serial diagnostic (SIL) | — | — | — | — | — | — | — | — |
| 16 | EFI main relay power (+B) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | TRAC snow-mode light (SNOW) | — | — | — | — | — | — | — | — |
| 22 | Switch ground (EC) | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | TRAC snow-mode switch (SNWI) | — | — | — | — | — | — | — | — |
| 4 | Fuel pump diagnostic (DI) | — | — | — | — | — | — | — | — |
| 5 | Fuel pump control (FPC) | — | — | — | — | — | — | — | — |
| 6 | Check-engine light (W) | — | — | — | — | — | — | — | — |
| 7 | ETCS-i power (+BM) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 8 | EFI main relay power (+B2) | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 9 | Ignition switch (IGSW) | — | W33 | — | 0.5 | NEXUSS3-A-13 | — | — | — |
OEM-B79
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | TRAC enable light (IND) | — | — | — | — | — | — | — | — |
| 14 | TRAC active light (CIND) | — | — | — | — | — | — | — | — |
| 17 | A/T meter LCD (LPO3) | — | — | — | — | — | — | — | — |
| 18 | A/T meter LCD (SPTL) | — | — | — | — | — | — | — | — |
| 19 | Reverse buzzer (BZ) | — | — | — | — | — | — | — | — |
| 2 | TRAC off switch (MSW) | — | — | — | — | — | — | — | — |
| 3 | A/T meter LCD (LPO1) | — | — | — | — | — | — | — | — |
| 4 | A/T meter LCD (LPO2) | — | — | — | — | — | — | — | — |
| 7 | Front right wheel speed (FRO) | — | — | — | — | — | — | — | — |
| 8 | Front left wheel speed (FLO) | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W12 | — | 0.5 | OEM-B74-22 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-B75-18 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-B75-19 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-B78-22 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | NEXUSS3-C-26 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | NEXUSS3-C-2 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | NEXUSS3-C-4 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-B78-16 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-B78-7 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | OEM-B78-8 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | NEXUSS3-A-18 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | NEXUSS3-A-25 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W6 | — | 0.85 | OEM-B74-21 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-B74-31 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | OEM-B74-9 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | OEM-B75-17 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | NEXUSS3-A-10 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | NEXUSS3-A-11 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-B74-1 | Injector 3 (#30) | injector_out | NEXUSS3-A-3 | Injector 3 | injector_out | single_source | |
| OEM-B74-10 | Cam position (G2) | trigger_in | NEXUSS3-C-3 | Home + | trigger_in | single_source | |
| OEM-B74-11 | Ignition 1 (IGT, cyl 1&6) | ignition_out | NEXUSS3-A-27 | Ignition 1 | ignition_out | single_source | |
| OEM-B74-12 | Ignition 2 (IGT2, cyl 5&2) | ignition_out | NEXUSS3-A-28 | Ignition 2 | ignition_out | single_source | |
| OEM-B74-13 | Ignition 3 (IGT3, cyl 3&4) | ignition_out | NEXUSS3-A-29 | Ignition 3 | ignition_out | single_source | |
| OEM-B74-15 | Wastegate VSV (PMC) | low_side_out | — | — | — | single_source | |
| OEM-B74-17 | VVT-i OCV - (OCV-) | low_side_out | NEXUSS3-A-9 | DPO 1 | low_side_out | single_source | |
| OEM-B74-18 | VVT-i OCV + (OCV+) | low_side_out | NEXUSS3-A-12 | DPO 2 | low_side_out | single_source | |
| OEM-B74-19 | ETCS-i clutch - (CL-) | low_side_out | NEXUSS3-A-14 | DPO 3 | low_side_out | single_source | |
| OEM-B74-2 | Injector 4 (#40) | injector_out | NEXUSS3-A-4 | Injector 4 | injector_out | single_source | |
| OEM-B74-20 | ETCS-i clutch + (CL+) | low_side_out | NEXUSS3-A-15 | DPO 4 | low_side_out | single_source | |
| OEM-B74-21 | Power ground (E01) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-B74-22 | Crank/cam sensor return (NE-) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-B74-23 | Crank position (NE+) | trigger_in | NEXUSS3-C-1 | Trigger + | trigger_in | single_source | |
| OEM-B74-24 | Neutral/park switch (NSW) | digital_in | — | — | — | single_source | |
| OEM-B74-25 | Igniter verification (IGF) | digital_in | NEXUSS3-C-8 | SPI 4 | digital_in | single_source | |
| OEM-B74-27 | Knock sensor 2 (KNK2, rear) | knock_in | NEXUSS3-C-24 | Knock 2 | knock_in | single_source | |
| OEM-B74-28 | Knock sensor 1 (KNK1, front) | knock_in | NEXUSS3-C-23 | Knock 1 | knock_in | single_source | |
| OEM-B74-3 | Injector 5 (#50) | injector_out | NEXUSS3-A-5 | Injector 5 | injector_out | single_source | |
| OEM-B74-30 | ETCS-i motor shield (GEO1) | shield | — | — | — | single_source | |
| OEM-B74-31 | Power ground (E02) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-B74-4 | Injector 6 (#60) | injector_out | NEXUSS3-A-6 | Injector 6 | injector_out | single_source | |
| OEM-B74-5 | Intake air bypass VSV (VSV1) | low_side_out | — | — | — | single_source | |
| OEM-B74-7 | ETCS-i motor - (M-) | hbridge_out | — | — | — | single_source | |
| OEM-B74-8 | ETCS-i motor + (M+) | hbridge_out | — | — | — | single_source | |
| OEM-B74-9 | ETCS-i ground (ME01) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-B75-10 | Mass air flow (VG) | analog_in | NEXUSS3-C-16 | AVI 7 | analog_in | single_source | |
| OEM-B75-12 | O2 sensor (OX) | lambda_nb_in | NEXUSS3-C-17 | AVI 8 | analog_in | single_source | |
| OEM-B75-14 | Coolant temperature (THW) | temp_in | NEXUSS3-C-15 | AVI 6 | analog_in | single_source | |
| OEM-B75-15 | Accelerator pedal 1 (VPA) | analog_in | NEXUSS3-C-11 | AVI 2 | analog_in | single_source | |
| OEM-B75-16 | Accelerator pedal 2 (VPA2) | analog_in | NEXUSS3-C-13 | AVI 4 | analog_in | single_source | |
| OEM-B75-17 | Power ground (E1) | ground | NEXUSS3-A-10 + NEXUSS3-A-11 | Battery ground + Battery ground | ground | single_source | |
| OEM-B75-18 | Sensor ground (E2) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-B75-19 | MAF ground (EVG) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-B75-2 | Sensor power (VC) | vref | NEXUSS3-C-25 | +5V | vref | single_source | |
| OEM-B75-20 | A/T 2nd-gear indicator (2) | digital_in | — | — | — | single_source | |
| OEM-B75-21 | A/T 1st-gear indicator (L) | digital_in | NEXUSS3-C-28 | AVI 11 | analog_in | single_source | |
| OEM-B75-22 | Intake air temperature (THA) | temp_in | NEXUSS3-C-18 | AVI 9 | analog_in | single_source | |
| OEM-B75-23 | Throttle position 1 (VTA) | analog_in | NEXUSS3-C-12 | AVI 3 | analog_in | single_source | |
| OEM-B75-24 | Throttle position 2 (VTA2) | analog_in | NEXUSS3-C-14 | AVI 5 | analog_in | single_source | |
| OEM-B75-3 | Exhaust gas control VSV (VSV2) | low_side_out | — | — | — | single_source | |
| OEM-B75-4 | O2 sensor heater (HT) | low_side_out | NEXUSS3-C-33 | WBI 1 Heater - | low_side_out | single_source | |
| OEM-B75-5 | Injector 1 (#10) | injector_out | NEXUSS3-A-1 | Injector 1 | injector_out | single_source | |
| OEM-B75-6 | Injector 2 (#20) | injector_out | NEXUSS3-A-2 | Injector 2 | injector_out | single_source | |
| OEM-B75-7 | EVAP purge VSV (PRG) | low_side_out | — | — | — | single_source | |
| OEM-B75-8 | Main oil pressure switch (MOPS) | digital_in | — | — | — | single_source | |
| OEM-B75-9 | Manifold pressure (PIM) | analog_in | NEXUSS3-C-10 | AVI 1 | analog_in | single_source | |
| OEM-B76-1 | A/T shift solenoid 1 (S1) | low_side_out | NEXUSS3-A-17 | DPO 6 | low_side_out | single_source | |
| OEM-B76-10 | OD direct-clutch speed (NCO-) | digital_in | NEXUSS3-C-19 | SPI 5 | digital_in | single_source | |
| OEM-B76-11 | No.2 speed sensor return (SP2-) | digital_in | NEXUSS3-C-6 | SPI 2 | digital_in | single_source | |
| OEM-B76-12 | Exhaust bypass VSV (VSV3) | low_side_out | — | — | — | single_source | |
| OEM-B76-13 | A/T lock-up solenoid - (SLU-) | low_side_out | — | — | — | single_source | |
| OEM-B76-14 | A/T accumulator solenoid - (SLN-) | low_side_out | — | — | — | single_source | |
| OEM-B76-15 | A/T line-pressure solenoid - (SLT-) | low_side_out | — | — | — | single_source | |
| OEM-B76-16 | Fuel pressure-up VSV (FPU) | low_side_out | — | — | — | single_source | |
| OEM-B76-17 | A/T oil temperature (OIL) | temp_in | NEXUSS3-C-27 | AVI 10 | analog_in | single_source | |
| OEM-B76-2 | A/T shift solenoid 2 (S2) | low_side_out | NEXUSS3-A-7 | Injector 7 | injector_out | single_source | |
| OEM-B76-3 | A/T shift solenoid 3 (S3) | low_side_out | NEXUSS3-A-8 | Injector 8 | injector_out | single_source | |
| OEM-B76-4 | OD direct-clutch speed (NCO+) | digital_in | NEXUSS3-C-20 | SPI 6 | digital_in | single_source | |
| OEM-B76-5 | No.2 speed sensor (SP2+) | digital_in | NEXUSS3-C-7 | SPI 3 | digital_in | single_source | |
| OEM-B76-6 | A/T shift solenoid 4 (S4) | low_side_out | — | — | — | single_source | |
| OEM-B76-7 | A/T lock-up solenoid + (SLU+) | low_side_out | — | — | — | single_source | |
| OEM-B76-8 | A/T accumulator solenoid + (SLN+) | low_side_out | — | — | — | single_source | |
| OEM-B76-9 | A/T line-pressure solenoid + (SLT+) | low_side_out | — | — | — | single_source | |
| OEM-B77-1 | A/C request (AC) | digital_in | — | — | — | single_source | |
| OEM-B77-13 | A/C clutch relay (ACMG) | low_side_out | NEXUSS3-A-26 | ECR output | low_side_out | single_source | |
| OEM-B77-14 | A/T shift down (SFTD) | digital_in | — | — | — | single_source | |
| OEM-B77-16 | A/T reverse indicator (R) | digital_in | — | — | — | single_source | |
| OEM-B77-18 | Rear right wheel speed (RRO) | digital_in | — | — | — | single_source | |
| OEM-B77-19 | Rear left wheel speed (RLO) | digital_in | — | — | — | single_source | |
| OEM-B77-2 | Starter signal (STA) | digital_in | — | — | — | single_source | |
| OEM-B77-20 | Tachometer output (TACH) | tacho_out | — | — | — | single_source | |
| OEM-B77-21 | ABS active (ABS) | digital_in | — | — | — | single_source | |
| OEM-B77-25 | No.1 speed sensor (SPD) | digital_in | NEXUSS3-C-5 | SPI 1 | digital_in | single_source | |
| OEM-B77-26 | Electrical load sense (ELS) | digital_in | — | — | — | single_source | |
| OEM-B77-27 | Road speed (RSPD) | digital_in | — | — | — | single_source | |
| OEM-B77-4 | A/T shift up (SFTU) | digital_in | — | — | — | single_source | |
| OEM-B77-5 | Diagnostic/timing check (TC) | digital_in | — | — | — | single_source | |
| OEM-B77-6 | Stop light switch (STP) | digital_in | — | — | — | single_source | |
| OEM-B77-7 | A/T manual position (3) | digital_in | — | — | — | single_source | |
| OEM-B78-1 | Battery constant (BATT) | power_in | — | — | — | single_source | |
| OEM-B78-10 | EFI main relay control (M-REL) | low_side_out | NEXUSS3-A-16 | DPO 5 | low_side_out | single_source | |
| OEM-B78-11 | Serial diagnostic (SIL) | serial | — | — | — | single_source | |
| OEM-B78-16 | EFI main relay power (+B) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source | |
| OEM-B78-2 | TRAC snow-mode light (SNOW) | low_side_out | — | — | — | single_source | |
| OEM-B78-22 | Switch ground (EC) | sensor_ground | NEXUSS3-C-2 + NEXUSS3-C-26 + NEXUSS3-C-4 | Trigger - + Signal ground + Home - | sensor_ground + trigger_in | single_source | |
| OEM-B78-3 | TRAC snow-mode switch (SNWI) | digital_in | — | — | — | single_source | |
| OEM-B78-4 | Fuel pump diagnostic (DI) | digital_in | — | — | — | single_source | |
| OEM-B78-5 | Fuel pump control (FPC) | low_side_out | — | — | — | single_source | |
| OEM-B78-6 | Check-engine light (W) | low_side_out | — | — | — | single_source | |
| OEM-B78-7 | ETCS-i power (+BM) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source | |
| OEM-B78-8 | EFI main relay power (+B2) | power_in | NEXUSS3-A-18 + NEXUSS3-A-25 | +12V switched input + +12V switched input | power_in | single_source | |
| OEM-B78-9 | Ignition switch (IGSW) | digital_in | NEXUSS3-A-13 | Ignition switch input | digital_in | single_source | |
| OEM-B79-1 | TRAC enable light (IND) | low_side_out | — | — | — | single_source | |
| OEM-B79-14 | TRAC active light (CIND) | low_side_out | — | — | — | single_source | |
| OEM-B79-17 | A/T meter LCD (LPO3) | low_side_out | — | — | — | single_source | |
| OEM-B79-18 | A/T meter LCD (SPTL) | low_side_out | — | — | — | single_source | |
| OEM-B79-19 | Reverse buzzer (BZ) | low_side_out | — | — | — | single_source | |
| OEM-B79-2 | TRAC off switch (MSW) | digital_in | — | — | — | single_source | |
| OEM-B79-3 | A/T meter LCD (LPO1) | low_side_out | — | — | — | single_source | |
| OEM-B79-4 | A/T meter LCD (LPO2) | low_side_out | — | — | — | single_source | |
| OEM-B79-7 | Front right wheel speed (FRO) | digital_in | — | — | — | single_source | |
| OEM-B79-8 | Front left wheel speed (FLO) | digital_in | — | — | — | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-B78-16 | SP-14V-1 | 0.85 | no route | EFI main relay power (+B) | — | |
| W2 | OEM-B78-7 | SP-14V-1 | 0.85 | no route | ETCS-i power (+BM) | — | |
| W3 | OEM-B78-8 | SP-14V-1 | 0.85 | no route | EFI main relay power (+B2) | — | |
| W4 | SP-14V-1 | NEXUSS3-A-18 | 0.85 | no route | +12V switched input | — | |
| W5 | SP-14V-1 | NEXUSS3-A-25 | 0.85 | no route | +12V switched input | — | |
| W6 | OEM-B74-21 | SP-GND-1 | 0.85 | no route | Power ground (E01) | — | |
| W7 | OEM-B74-31 | SP-GND-1 | 0.85 | no route | Power ground (E02) | — | |
| W8 | OEM-B74-9 | SP-GND-1 | 0.85 | no route | ETCS-i ground (ME01) | — | |
| W9 | OEM-B75-17 | SP-GND-1 | 0.85 | no route | Power ground (E1) | — | |
| W10 | SP-GND-1 | NEXUSS3-A-10 | 0.85 | no route | Battery ground | — | |
| W11 | SP-GND-1 | NEXUSS3-A-11 | 0.85 | no route | Battery ground | — | |
| W12 | OEM-B74-22 | SP-0V-1 | 0.5 | no route | Crank/cam sensor return (NE-) | — | |
| W13 | OEM-B75-18 | SP-0V-1 | 0.5 | no route | Sensor ground (E2) | — | |
| W14 | OEM-B75-19 | SP-0V-1 | 0.5 | no route | MAF ground (EVG) | — | |
| W15 | OEM-B78-22 | SP-0V-1 | 0.5 | no route | Switch ground (EC) | — | |
| W16 | SP-0V-1 | NEXUSS3-C-26 | 0.5 | no route | Signal ground | — | |
| W17 | OEM-B75-2 | NEXUSS3-C-25 | 0.5 | no route | Sensor power (VC) | — | |
| W18 | OEM-B74-23 | NEXUSS3-C-1 | 0.5 | no route | Crank position (NE+) | — | |
| W19 | SP-0V-1 | NEXUSS3-C-2 | 0.5 | no route | Trigger - | — | |
| W20 | OEM-B74-10 | NEXUSS3-C-3 | 0.5 | no route | Cam position (G2) | — | |
| W21 | SP-0V-1 | NEXUSS3-C-4 | 0.5 | no route | Home - | — | |
| W22 | OEM-B74-28 | NEXUSS3-C-23 | 0.5 | no route | Knock sensor 1 (KNK1, front) | — | |
| W23 | OEM-B74-27 | NEXUSS3-C-24 | 0.5 | no route | Knock sensor 2 (KNK2, rear) | — | |
| W24 | OEM-B74-11 | NEXUSS3-A-27 | 0.5 | no route | Ignition 1 (IGT, cyl 1&6) | — | |
| W25 | OEM-B74-12 | NEXUSS3-A-28 | 0.5 | no route | Ignition 2 (IGT2, cyl 5&2) | — | |
| W26 | OEM-B74-13 | NEXUSS3-A-29 | 0.5 | no route | Ignition 3 (IGT3, cyl 3&4) | — | |
| W27 | OEM-B75-5 | NEXUSS3-A-1 | 0.5 | no route | Injector 1 (#10) | — | |
| W28 | OEM-B75-6 | NEXUSS3-A-2 | 0.5 | no route | Injector 2 (#20) | — | |
| W29 | OEM-B74-1 | NEXUSS3-A-3 | 0.5 | no route | Injector 3 (#30) | — | |
| W30 | OEM-B74-2 | NEXUSS3-A-4 | 0.5 | no route | Injector 4 (#40) | — | |
| W31 | OEM-B74-3 | NEXUSS3-A-5 | 0.5 | no route | Injector 5 (#50) | — | |
| W32 | OEM-B74-4 | NEXUSS3-A-6 | 0.5 | no route | Injector 6 (#60) | — | |
| W33 | OEM-B78-9 | NEXUSS3-A-13 | 0.5 | no route | Ignition switch (IGSW) | — | |
| W34 | OEM-B74-17 | NEXUSS3-A-9 | 0.5 | no route | VVT-i OCV - (OCV-) | — | |
| W35 | OEM-B74-18 | NEXUSS3-A-12 | 0.5 | no route | VVT-i OCV + (OCV+) | — | |
| W36 | OEM-B74-19 | NEXUSS3-A-14 | 0.5 | no route | ETCS-i clutch - (CL-) | — | |
| W37 | OEM-B74-20 | NEXUSS3-A-15 | 0.5 | no route | ETCS-i clutch + (CL+) | — | |
| W38 | OEM-B75-9 | NEXUSS3-C-10 | 0.5 | no route | Manifold pressure (PIM) | — | |
| W39 | OEM-B75-15 | NEXUSS3-C-11 | 0.5 | no route | Accelerator pedal 1 (VPA) | — | |
| W40 | OEM-B75-23 | NEXUSS3-C-12 | 0.5 | no route | Throttle position 1 (VTA) | — | |
| W41 | OEM-B75-16 | NEXUSS3-C-13 | 0.5 | no route | Accelerator pedal 2 (VPA2) | — | |
| W42 | OEM-B75-24 | NEXUSS3-C-14 | 0.5 | no route | Throttle position 2 (VTA2) | — | |
| W43 | OEM-B75-14 | NEXUSS3-C-15 | 0.5 | no route | Coolant temperature (THW) | — | |
| W44 | OEM-B77-13 | NEXUSS3-A-26 | 0.5 | no route | A/C clutch relay (ACMG) | — | |
| W45 | OEM-B78-10 | NEXUSS3-A-16 | 0.5 | no route | EFI main relay control (M-REL) | — | |
| W46 | OEM-B75-4 | NEXUSS3-C-33 | 0.5 | no route | O2 sensor heater (HT) | — | |
| W47 | OEM-B76-1 | NEXUSS3-A-17 | 0.5 | no route | A/T shift solenoid 1 (S1) | — | |
| W48 | OEM-B76-2 | NEXUSS3-A-7 | 0.5 | no route | A/T shift solenoid 2 (S2) | — | |
| W49 | OEM-B76-3 | NEXUSS3-A-8 | 0.5 | no route | A/T shift solenoid 3 (S3) | — | |
| W50 | OEM-B75-10 | NEXUSS3-C-16 | 0.5 | no route | Mass air flow (VG) | — | |
| W51 | OEM-B75-12 | NEXUSS3-C-17 | 0.5 | no route | O2 sensor (OX) | — | |
| W52 | OEM-B75-22 | NEXUSS3-C-18 | 0.5 | no route | Intake air temperature (THA) | — | |
| W53 | OEM-B76-17 | NEXUSS3-C-27 | 0.5 | no route | A/T oil temperature (OIL) | — | |
| W54 | OEM-B77-25 | NEXUSS3-C-5 | 0.5 | no route | No.1 speed sensor (SPD) | — | |
| W55 | OEM-B76-11 | NEXUSS3-C-6 | 0.5 | no route | No.2 speed sensor return (SP2-) | — | |
| W56 | OEM-B76-5 | NEXUSS3-C-7 | 0.5 | no route | No.2 speed sensor (SP2+) | — | |
| W57 | OEM-B74-25 | NEXUSS3-C-8 | 0.5 | no route | Igniter verification (IGF) | — | |
| W58 | OEM-B76-10 | NEXUSS3-C-19 | 0.5 | no route | OD direct-clutch speed (NCO-) | — | |
| W59 | OEM-B76-4 | NEXUSS3-C-20 | 0.5 | no route | OD direct-clutch speed (NCO+) | — | |
| W60 | OEM-B75-21 | NEXUSS3-C-28 | 0.5 | no route | A/T 1st-gear indicator (L) | — |
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 (12)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | REQUIRED_UNMAPPED | OEM-B74-7 | Required OEM function "ETCS-i motor - (M-)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-B74-8 | Required OEM function "ETCS-i motor + (M+)" (hbridge_out) is not connected to the new ECU. |
| warn | LOAD_UNKNOWN | NEXUSS3-A-26 | NEXUSS3-A-26 "ECR output" drives OEM-B77-13 A/C clutch relay (ACMG) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | NET_FAMILY | OEM-B75-21 ↔ NEXUSS3-C-28 | OEM-B75-21 "A/T 1st-gear indicator (L)" [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. |
| 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 | OEM-B75-14 ↔ NEXUSS3-C-15 | OEM-B75-14 "Coolant temperature (THW)" [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 | NET_FAMILY | OEM-B75-22 ↔ NEXUSS3-C-18 | OEM-B75-22 "Intake air temperature (THA)" [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-B76-17 ↔ NEXUSS3-C-27 | OEM-B76-17 "A/T oil temperature (OIL)" [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-B76-2 ↔ NEXUSS3-A-7 | OEM-B76-2 "A/T shift solenoid 2 (S2)" [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-B76-3 ↔ NEXUSS3-A-8 | OEM-B76-3 "A/T shift solenoid 3 (S3)" [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-B78-22 ↔ NEXUSS3-C-4 | OEM-B78-22 "Switch ground (EC)" [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 | 47 optional OEM pins are not mapped: OEM-B74-15 Wastegate VSV (PMC); OEM-B74-24 Neutral/park switch (NSW); OEM-B74-30 ETCS-i motor shield (GEO1); OEM-B74-5 Intake air bypass VSV (VSV1); OEM-B75-20 A/T 2nd-gear indicator (2); OEM-B75-3 Exhaust gas control VSV (VSV2); OEM-B75-7 EVAP purge VSV (PRG); OEM-B75-8 Main oil pressure switch (MOPS); OEM-B76-12 Exhaust bypass VSV (VSV3); OEM-B76-13 A/T lock-up solenoid - (SLU-); OEM-B76-14 A/T accumulator solenoid - (SLN-); OEM-B76-15 A/T line-pressure solenoid - (SLT-); OEM-B76-16 Fuel pressure-up VSV (FPU); OEM-B76-6 A/T shift solenoid 4 (S4); OEM-B76-7 A/T lock-up solenoid + (SLU+); OEM-B76-8 A/T accumulator solenoid + (SLN+); OEM-B76-9 A/T line-pressure solenoid + (SLT+); OEM-B77-1 A/C request (AC); OEM-B77-14 A/T shift down (SFTD); OEM-B77-16 A/T reverse indicator (R); OEM-B77-18 Rear right wheel speed (RRO); OEM-B77-19 Rear left wheel speed (RLO); OEM-B77-2 Starter signal (STA); OEM-B77-20 Tachometer output (TACH); OEM-B77-21 ABS active (ABS); OEM-B77-26 Electrical load sense (ELS); OEM-B77-27 Road speed (RSPD); OEM-B77-4 A/T shift up (SFTU); OEM-B77-5 Diagnostic/timing check (TC); OEM-B77-6 Stop light switch (STP); OEM-B77-7 A/T manual position (3); OEM-B78-11 Serial diagnostic (SIL); OEM-B78-2 TRAC snow-mode light (SNOW); OEM-B78-3 TRAC snow-mode switch (SNWI); OEM-B78-4 Fuel pump diagnostic (DI); OEM-B78-5 Fuel pump control (FPC); OEM-B78-6 Check-engine light (W); OEM-B79-1 TRAC enable light (IND); OEM-B79-14 TRAC active light (CIND); OEM-B79-17 A/T meter LCD (LPO3); OEM-B79-18 A/T meter LCD (SPTL); OEM-B79-19 Reverse buzzer (BZ); OEM-B79-2 TRAC off switch (MSW); OEM-B79-3 A/T meter LCD (LPO1); OEM-B79-4 A/T meter LCD (LPO2); OEM-B79-7 Front right wheel speed (FRO); OEM-B79-8 Front left wheel speed (FLO) |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-B78-1 | 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-B74 7: ETCS-i motor - (M-): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-B74 8: ETCS-i motor + (M+): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand Not wired: - OEM-B78 1: Battery constant (BATT): Haltech Nexus S3 has no battery-constant input; not needed - OEM-B74 30: ETCS-i motor shield (GEO1): no shield pin on Haltech Nexus S3 - OEM-B76 6: A/T shift solenoid 4 (S4): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B74 15: Wastegate VSV (PMC): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B74 5: Intake air bypass VSV (VSV1): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B75 3: Exhaust gas control VSV (VSV2): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B75 7: EVAP purge VSV (PRG): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B76 12: Exhaust bypass VSV (VSV3): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B76 13: A/T lock-up solenoid - (SLU-): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B76 14: A/T accumulator solenoid - (SLN-): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B76 15: A/T line-pressure solenoid - (SLT-): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B76 16: Fuel pressure-up VSV (FPU): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B76 7: A/T lock-up solenoid + (SLU+): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B76 8: A/T accumulator solenoid + (SLN+): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B76 9: A/T line-pressure solenoid + (SLT+): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B78 2: TRAC snow-mode light (SNOW): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B78 5: Fuel pump control (FPC): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B78 6: Check-engine light (W): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B79 1: TRAC enable light (IND): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B79 14: TRAC active light (CIND): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B79 17: A/T meter LCD (LPO3): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B79 18: A/T meter LCD (SPTL): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B79 19: Reverse buzzer (BZ): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B79 3: A/T meter LCD (LPO1): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B79 4: A/T meter LCD (LPO2): no free low_side/relay_control/heater_low_side/ls_hs/injector on Haltech Nexus S3 - OEM-B77 20: Tachometer output (TACH): no free tacho/frequency_out/low_side/ls_hs on Haltech Nexus S3 - OEM-B77 18: Rear right wheel speed (RRO): no free frequency_in/switch_in on Haltech Nexus S3 - OEM-B77 19: Rear left wheel speed (RLO): no free frequency_in/switch_in on Haltech Nexus S3 - OEM-B77 27: Road speed (RSPD): no free frequency_in/switch_in on Haltech Nexus S3 - OEM-B78 4: Fuel pump diagnostic (DI): no free frequency_in/switch_in on Haltech Nexus S3 - OEM-B79 7: Front right wheel speed (FRO): no free frequency_in/switch_in on Haltech Nexus S3 - OEM-B79 8: Front left wheel speed (FLO): no free frequency_in/switch_in on Haltech Nexus S3 - OEM-B75 20: A/T 2nd-gear indicator (2): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B74 24: Neutral/park switch (NSW): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B75 8: Main oil pressure switch (MOPS): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B77 1: A/C request (AC): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B77 14: A/T shift down (SFTD): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B77 16: A/T reverse indicator (R): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B77 2: Starter signal (STA): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B77 21: ABS active (ABS): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B77 26: Electrical load sense (ELS): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B77 4: A/T shift up (SFTU): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B77 5: Diagnostic/timing check (TC): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B77 6: Stop light switch (STP): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B77 7: A/T manual position (3): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B78 3: TRAC snow-mode switch (SNWI): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B79 2: TRAC off switch (MSW): no free switch_in/frequency_in/analog_0_5 on Haltech Nexus S3 - OEM-B78 11: Serial diagnostic (SIL): no free k_line on Haltech Nexus S3
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 |
| 3 | community_copy | wilbo666: 2JZ-GTE VVTi JZA80 Supra Engine Wiring (ECU pinout, B74-B79) | http://wilbo666.pbworks.com/w/page/57949268/2JZ-GTE%20VVTi%20JZA80%20Supra%20Engine%20Wiring | — | — | — |