Honda NSX NA1 1991-2005 (C30A) → DTAFast T12 (auto)
Honda NSX NA1 1991-2005 (C30A) — DTAFast — T12
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-10
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 | 72 wires · 12 connectors · 2 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Terminals | 3-1447221-4 |
| Order of work | 1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up. |
Build checklist
Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.
| Wire | From | To | Gauge | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-A-25 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-C-1 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | T12-C1-31 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-D-1 | T12-C3-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-A-23 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-A-24 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-B-2 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | T12-C1-13 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | T12-C1-14 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-A-26 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-B-10 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-B-12 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-B-14 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-B-16 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-D-21 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-D-22 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | SP-0V-1 | T12-C2-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | SP-0V-1 | T12-C2-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-D-18 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-D-19 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-D-20 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | SP-5V1-1 | T12-C2-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-B-15 | T12-C2-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-B-13 | T12-C2-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-B-11 | T12-C2-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-B-9 | T12-C2-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-D-4 | T12-C3-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-D-3 | T12-C3-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-A-21 | T12-C1-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-A-22 | T12-C1-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-B-8 | T12-C1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-B-6 | T12-C1-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-B-4 | T12-C1-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-B-3 | T12-C1-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-A-1 | T12-C1-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-A-3 | T12-C1-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-A-5 | T12-C1-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-A-2 | T12-C1-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-A-4 | T12-C1-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-A-6 | T12-C1-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-A-8 | T12-C1-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-A-15 | T12-C1-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A-18 | T12-C1-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A-7 | T12-C3-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-5-F5 | T12-C1-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-5-F7 | T12-C1-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-A-10 | T12-C3-9 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-A-12 | T12-C3-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-A-11 | T12-C3-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-A-13 | T12-C3-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-A-14 | T12-C3-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-A-20 | T12-C3-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-A-9 | T12-C3-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-C-4 | T12-C3-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-D-17 | T12-C2-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-D-11 | T12-C2-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-D-14 | T12-C2-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-D-16 | T12-C2-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-D-13 | T12-C2-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-D-15 | T12-C2-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-D-12 | T12-C2-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-C-2 | T12-C2-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W63 | OEM-D-9 | T12-C2-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W64 | OEM-5-F2 | T12-C2-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W65 | OEM-5-F4 | T12-C2-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W66 | OEM-B-7 | T12-C2-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W67 | OEM-C-11 | T12-C2-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W68 | OEM-C-3 | T12-C2-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W69 | OEM-C-5 | T12-C2-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W70 | OEM-C-7 | T12-C3-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W71 | OEM-C-9 | T12-C3-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W72 | OEM-D-8 | T12-C3-21 | 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 | T12-C1-31 | T12-C2-21 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | T12-C1-13 | T12-C1-31 | open (OL) | power ground must not touch +12 V supply | |
| 3 | T12-C1-13 | T12-C2-24 | open (OL) | power ground must not touch 5 V sensor reference | |
| 4 | T12-C1-13 | T12-C3-26 | open (OL) | power ground must not touch +12 V supply | |
| 5 | T12-C1-31 | T12-C2-24 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 6 | T12-C2-21 | T12-C2-24 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 7 | T12-C2-21 | T12-C3-26 | open (OL) | sensor ground must not touch +12 V supply | |
| 8 | T12-C3-26 | T12-C2-24 | open (OL) | +12 V supply 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
OEM-5
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| F2 | Front VTEC pressure switch | — | W64 | — | 0.5 | T12-C2-4 | — | — | — |
| F4 | Rear VTEC pressure switch | — | W65 | — | 0.5 | T12-C2-8 | — | — | — |
| F5 | Front VTEC solenoid valve | — | W45 | — | 0.5 | T12-C1-6 | — | — | — |
| F7 | Rear VTEC solenoid valve | — | W46 | — | 0.5 | T12-C1-7 | — | — | — |
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 1 | — | W35 | — | 0.5 | T12-C1-9 | — | — | — |
| 10 | Front O2 sensor heater (HTCNTF) | — | W47 | — | 0.5 | T12-C3-9 | — | — | — |
| 11 | EGR control solenoid | — | W49 | — | 0.5 | T12-C3-23 | — | — | — |
| 12 | Rear O2 sensor heater (HTCNTR) | — | W48 | — | 0.5 | T12-C3-3 | — | — | — |
| 13 | Check engine light (WARN) | — | W50 | — | 0.5 | T12-C3-24 | — | — | — |
| 14 | Chamber volume control solenoid (BPS) | — | W51 | — | 0.5 | T12-C3-25 | — | — | — |
| 15 | A/C clutch relay (ACC) | — | W42 | — | 0.5 | T12-C1-4 | — | — | — |
| 18 | Radiator fan control (FANCNTR) | — | W43 | — | 0.5 | T12-C1-3 | — | — | — |
| 2 | Injector 4 | — | W38 | — | 0.5 | T12-C1-25 | — | — | — |
| 20 | EVAP purge cut-off solenoid (PGS) | — | W52 | — | 0.5 | T12-C3-10 | — | — | — |
| 21 | Ignition coil 1 | — | W29 | — | 0.5 | T12-C1-10 | — | — | — |
| 22 | Ignition coil 2 | — | W30 | — | 0.5 | T12-C1-18 | — | — | — |
| 23 | Power ground (PG1) | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 24 | Power ground (PG2) | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 25 | ECU power (IGP1) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 26 | Sensor ground (LG1) | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Injector 2 | — | W36 | — | 0.5 | T12-C1-17 | — | — | — |
| 4 | Injector 5 | — | W39 | — | 0.5 | T12-C1-16 | — | — | — |
| 5 | Injector 3 | — | W37 | — | 0.5 | T12-C1-34 | — | — | — |
| 6 | Injector 6 | — | W40 | — | 0.5 | T12-C1-15 | — | — | — |
| 7 | Main relay | — | W44 | — | 0.5 | T12-C3-22 | — | — | — |
| 8 | Fuel pump relay 2 (FLR2) | — | W41 | — | 0.5 | T12-C1-5 | — | — | — |
| 9 | Idle air control valve (IACV) | — | W53 | — | 0.5 | T12-C3-4 | — | — | — |
OEM-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | CYL 2M — CYP sensor 2 return | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 11 | CYL 1P — CYP sensor 1 signal | — | W25 | — | 0.5 | T12-C2-22 | — | — | — |
| 12 | CYL 1M — CYP sensor 1 return | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 13 | CRNK 2P — TDC sensor signal | — | W24 | — | 0.5 | T12-C2-2 | — | — | — |
| 14 | CRNK 2M — TDC sensor return | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 15 | CRNK 1P — crank sensor signal | — | W23 | — | 0.5 | T12-C2-12 | — | — | — |
| 16 | CRNK 1M — crank sensor return | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | Chassis ground (LG2) | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | Ignition coil 6 | — | W34 | — | 0.5 | T12-C1-27 | — | — | — |
| 4 | Ignition coil 5 | — | W33 | — | 0.5 | T12-C1-11 | — | — | — |
| 6 | Ignition coil 4 | — | W32 | — | 0.5 | T12-C1-26 | — | — | — |
| 7 | Neutral switch (M/T) / gear position (A/T) | — | W66 | — | 0.5 | T12-C2-11 | — | — | — |
| 8 | Ignition coil 3 | — | W31 | — | 0.5 | T12-C1-1 | — | — | — |
| 9 | CYL 2P — CYP sensor 2 signal | — | W26 | — | 0.5 | T12-C2-29 | — | — | — |
OEM-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU power (IGP2) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 10 | Traction control | — | — | — | — | — | — | — | — |
| 11 | Starter switch (STS) | — | W67 | — | 0.5 | T12-C2-14 | — | — | — |
| 12 | Traction control | — | — | — | — | — | — | — | — |
| 2 | Vehicle speed sensor (VSS) | — | W62 | — | 0.5 | T12-C2-20 | — | — | — |
| 3 | A/C switch (ACS) | — | W68 | — | 0.5 | T12-C2-15 | — | — | — |
| 4 | Tachometer output (NEP) | — | W54 | — | 0.5 | T12-C3-28 | — | — | — |
| 5 | A/C pressure switch (PDSW) | — | W69 | — | 0.5 | T12-C2-27 | — | — | — |
| 6 | Traction control | — | — | — | — | — | — | — | — |
| 7 | Clutch switch (M/T) | — | W70 | — | 0.5 | T12-C3-19 | — | — | — |
| 8 | Traction control | — | — | — | — | — | — | — | — |
| 9 | Service check connector (SCS) | — | W71 | — | 0.5 | T12-C3-20 | — | — | — |
OEM-D
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Battery backup (VBU) | — | W4 | — | 0.85 | T12-C3-26 | — | — | — |
| 11 | Throttle position sensor (TPS) | — | W56 | — | 0.5 | T12-C2-1 | — | — | — |
| 12 | EGR lift sensor (EGRL) | — | W61 | — | 0.5 | T12-C2-18 | — | — | — |
| 13 | Engine coolant temperature (ECT) | — | W59 | — | 0.5 | T12-C2-7 | — | — | — |
| 14 | Primary O2 sensor | — | W57 | — | 0.5 | T12-C2-5 | — | — | — |
| 15 | Intake air temperature (IAT) | — | W60 | — | 0.5 | T12-C2-25 | — | — | — |
| 16 | Secondary O2 sensor | — | W58 | — | 0.5 | T12-C2-6 | — | — | — |
| 17 | MAP sensor | — | W55 | — | 0.5 | T12-C2-10 | — | — | — |
| 18 | +5V sensor supply (VCC) | — | W19 | — | 0.5 | SP-5V1-1 | — | — | — |
| 19 | +5V sensor supply (VCC) | — | W20 | — | 0.5 | SP-5V1-1 | — | — | — |
| 20 | +5V sensor supply (VCC) | — | W21 | — | 0.5 | SP-5V1-1 | — | — | — |
| 21 | Sensor ground (SG) | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Sensor ground (SG) | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Knock sensor — rear | — | W28 | — | 0.5 | T12-C3-32 | — | — | — |
| 4 | Knock sensor — front | — | W27 | — | 0.5 | T12-C3-31 | — | — | — |
| 5 | Traction control | — | — | — | — | — | — | — | — |
| 6 | Fuel pump voltage monitor (VFP) | — | — | — | — | — | — | — | — |
| 8 | Ignition timing adjuster (IGADJ) | — | W72 | — | 0.5 | T12-C3-21 | — | — | — |
| 9 | Alternator FR signal | — | W63 | — | 0.5 | T12-C2-31 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W10 | — | 0.5 | OEM-A-26 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-B-10 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-B-12 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-B-14 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-B-16 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-D-21 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-D-22 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | T12-C2-21 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | T12-C2-33 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A-25 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-C-1 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | T12-C1-31 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W19 | — | 0.5 | OEM-D-18 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | OEM-D-19 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | OEM-D-20 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | T12-C2-24 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W5 | — | 0.85 | OEM-A-23 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-A-24 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-B-2 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | T12-C1-13 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | T12-C1-14 | — | — | — |
T12-C1
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Coil 3 | — | W31 | — | 0.5 | OEM-B-8 | — | — | — |
| 2 | Coil 11 | — | — | — | — | — | — | — | — |
| 3 | PWM 3 | — | W43 | — | 0.5 | OEM-A-18 | — | — | — |
| 4 | PWM 2 | — | W42 | — | 0.5 | OEM-A-15 | — | — | — |
| 5 | PWM 1 | — | W41 | — | 0.5 | OEM-A-8 | — | — | — |
| 6 | Motor 1 + | — | W45 | — | 0.5 | OEM-5-F5 | — | — | — |
| 7 | Motor 1 - | — | W46 | — | 0.5 | OEM-5-F7 | — | — | — |
| 8 | Injector 11 | — | — | — | — | — | — | — | — |
| 9 | Injector 1 | — | W35 | — | 0.5 | OEM-A-1 | — | — | — |
| 10 | Coil 1 | — | W29 | — | 0.5 | OEM-A-21 | — | — | — |
| 11 | Coil 5 | — | W33 | — | 0.5 | OEM-B-4 | — | — | — |
| 12 | Coil 7 | — | — | — | — | — | — | — | — |
| 13 | Power Ground 1 | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 14 | Power Ground 2 | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 15 | Injector 6 | — | W40 | — | 0.5 | OEM-A-6 | — | — | — |
| 16 | Injector 5 | — | W39 | — | 0.5 | OEM-A-4 | — | — | — |
| 17 | Injector 2 | — | W36 | — | 0.5 | OEM-A-3 | — | — | — |
| 18 | Coil 2 | — | W30 | — | 0.5 | OEM-A-22 | — | — | — |
| 19 | Coil 8 | — | — | — | — | — | — | — | — |
| 20 | Coil 9 | — | — | — | — | — | — | — | — |
| 21 | Injector 9 | — | — | — | — | — | — | — | — |
| 22 | Injector 10 | — | — | — | — | — | — | — | — |
| 23 | Injector 8 | — | — | — | — | — | — | — | — |
| 24 | Injector 7 | — | — | — | — | — | — | — | — |
| 25 | Injector 4 | — | W38 | — | 0.5 | OEM-A-2 | — | — | — |
| 26 | Coil 4 | — | W32 | — | 0.5 | OEM-B-6 | — | — | — |
| 27 | Coil 6 | — | W34 | — | 0.5 | OEM-B-3 | — | — | — |
| 28 | Coil 10 | — | — | — | — | — | — | — | — |
| 29 | Motor 2 + | — | — | — | — | — | — | — | — |
| 30 | Motor 2 - | — | — | — | — | — | — | — | — |
| 31 | Ignition 12v In | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 32 | Injector 12 | — | — | — | — | — | — | — | — |
| 33 | Coil 12 | — | — | — | — | — | — | — | — |
| 34 | Injector 3 | — | W37 | — | 0.5 | OEM-A-5 | — | — | — |
T12-C2
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Analogue 2 | — | W56 | — | 0.5 | OEM-D-11 | — | — | — |
| 2 | Wheel 1 | — | W24 | — | 0.5 | OEM-B-13 | — | — | — |
| 3 | Analogue 10 | — | — | — | — | — | — | — | — |
| 4 | Digital 1 | — | W64 | — | 0.5 | OEM-5-F2 | — | — | — |
| 5 | Analogue 3 | — | W57 | — | 0.5 | OEM-D-14 | — | — | — |
| 6 | Analogue 4 | — | W58 | — | 0.5 | OEM-D-16 | — | — | — |
| 7 | Thermistor 1 | — | W59 | — | 0.5 | OEM-D-13 | — | — | — |
| 8 | Digital 2 | — | W65 | — | 0.5 | OEM-5-F4 | — | — | — |
| 9 | 5v Output | — | — | — | — | — | — | — | — |
| 10 | Analogue 1 | — | W55 | — | 0.5 | OEM-D-17 | — | — | — |
| 11 | Digital 3 | — | W66 | — | 0.5 | OEM-B-7 | — | — | — |
| 12 | Crank | — | W23 | — | 0.5 | OEM-B-15 | — | — | — |
| 13 | Analogue 12 | — | — | — | — | — | — | — | — |
| 14 | Digital 4 | — | W67 | — | 0.5 | OEM-C-11 | — | — | — |
| 15 | Digital 5 | — | W68 | — | 0.5 | OEM-C-3 | — | — | — |
| 16 | Analogue 11 | — | — | — | — | — | — | — | — |
| 17 | Thermistor 3 | — | — | — | — | — | — | — | — |
| 18 | Analogue 5 | — | W61 | — | 0.5 | OEM-D-12 | — | — | — |
| 19 | Analogue 6 | — | — | — | — | — | — | — | — |
| 20 | Wheel 2 | — | W62 | — | 0.5 | OEM-C-2 | — | — | — |
| 21 | Sensor Ground | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Cam 1 | — | W25 | — | 0.5 | OEM-B-11 | — | — | — |
| 23 | Cam 3 | — | — | — | — | — | — | — | — |
| 24 | 5v Output | — | W22 | — | 0.5 | SP-5V1-1 | — | — | — |
| 25 | Thermistor 2 | — | W60 | — | 0.5 | OEM-D-15 | — | — | — |
| 26 | CAN High | — | — | — | — | — | — | — | — |
| 27 | Digital 6 | — | W69 | — | 0.5 | OEM-C-5 | — | — | — |
| 28 | CAN Low | — | — | — | — | — | — | — | — |
| 29 | Cam 2 | — | W26 | — | 0.5 | OEM-B-9 | — | — | — |
| 30 | Cam 4 | — | — | — | — | — | — | — | — |
| 31 | Wheel 3 | — | W63 | — | 0.5 | OEM-D-9 | — | — | — |
| 32 | Wheel 4 | — | — | — | — | — | — | — | — |
| 33 | Sensor Ground | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 34 | Analogue 9 | — | — | — | — | — | — | — | — |
T12-C3
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Lambda 2 Pump Current | — | — | — | — | — | — | — | — |
| 2 | Lambda 2 VGND | — | — | — | — | — | — | — | — |
| 3 | Lambda 2 Heater Negative | — | W48 | — | 0.5 | OEM-A-12 | — | — | — |
| 4 | PWM 9 | — | W53 | — | 0.5 | OEM-A-9 | — | — | — |
| 5 | Lambda 2 Trim Resistor | — | — | — | — | — | — | — | — |
| 6 | Lambda 2 Nernst Voltage | — | — | — | — | — | — | — | — |
| 7 | Lambda 1 Pump Current | — | — | — | — | — | — | — | — |
| 8 | Lambda 1 VGND | — | — | — | — | — | — | — | — |
| 9 | Lambda 1 Heater Negative | — | W47 | — | 0.5 | OEM-A-10 | — | — | — |
| 10 | PWM 8 | — | W52 | — | 0.5 | OEM-A-20 | — | — | — |
| 11 | Lambda 1 Trim Resistor | — | — | — | — | — | — | — | — |
| 12 | Lambda 1 Nernst Voltage | — | — | — | — | — | — | — | — |
| 13 | Analogue 13 | — | — | — | — | — | — | — | — |
| 14 | Analogue 14 | — | — | — | — | — | — | — | — |
| 15 | Analogue 15 | — | — | — | — | — | — | — | — |
| 16 | Analogue 16 | — | — | — | — | — | — | — | — |
| 17 | Analogue 7 | — | — | — | — | — | — | — | — |
| 18 | Analogue 8 | — | — | — | — | — | — | — | — |
| 19 | Digital 7 | — | W70 | — | 0.5 | OEM-C-7 | — | — | — |
| 20 | Digital 8 | — | W71 | — | 0.5 | OEM-C-9 | — | — | — |
| 21 | Digital 9 | — | W72 | — | 0.5 | OEM-D-8 | — | — | — |
| 22 | PWM 4 | — | W44 | — | 0.5 | OEM-A-7 | — | — | — |
| 23 | PWM 5 | — | W49 | — | 0.5 | OEM-A-11 | — | — | — |
| 24 | PWM 6 | — | W50 | — | 0.5 | OEM-A-13 | — | — | — |
| 25 | PWM 7 | — | W51 | — | 0.5 | OEM-A-14 | — | — | — |
| 26 | Permanent 12v | — | W4 | — | 0.85 | OEM-D-1 | — | — | — |
| 27 | Permanent 12v | — | — | — | — | — | — | — | — |
| 28 | PWM 10 | — | W54 | — | 0.5 | OEM-C-4 | — | — | — |
| 29 | PWM 11 | — | — | — | — | — | — | — | — |
| 30 | PWM 12 | — | — | — | — | — | — | — | — |
| 31 | Knock 1 | — | W27 | — | 0.5 | OEM-D-4 | — | — | — |
| 32 | Knock 2 | — | W28 | — | 0.5 | OEM-D-3 | — | — | — |
| 33 | CAN 2 High | — | — | — | — | — | — | — | — |
| 34 | CAN 2 Low | — | — | — | — | — | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-5-F2 | Front VTEC pressure switch | digital_in | T12-C2-4 | Digital 1 | digital_in | single_source | |
| OEM-5-F4 | Rear VTEC pressure switch | digital_in | T12-C2-8 | Digital 2 | digital_in | single_source | |
| OEM-5-F5 | Front VTEC solenoid valve | high_side_out | T12-C1-6 | Motor 1 + | hbridge_out | single_source | |
| OEM-5-F7 | Rear VTEC solenoid valve | high_side_out | T12-C1-7 | Motor 1 - | hbridge_out | single_source | |
| OEM-A-1 | Injector 1 | injector_out | T12-C1-9 | Injector 1 | injector_out | single_source | |
| OEM-A-10 | Front O2 sensor heater (HTCNTF) | low_side_out | T12-C3-9 | Lambda 1 Heater Negative | low_side_out | single_source | |
| OEM-A-11 | EGR control solenoid | low_side_out | T12-C3-23 | PWM 5 | low_side_out | single_source | |
| OEM-A-12 | Rear O2 sensor heater (HTCNTR) | low_side_out | T12-C3-3 | Lambda 2 Heater Negative | low_side_out | single_source | |
| OEM-A-13 | Check engine light (WARN) | low_side_out | T12-C3-24 | PWM 6 | low_side_out | single_source | |
| OEM-A-14 | Chamber volume control solenoid (BPS) | low_side_out | T12-C3-25 | PWM 7 | low_side_out | single_source | |
| OEM-A-15 | A/C clutch relay (ACC) | low_side_out | T12-C1-4 | PWM 2 | low_side_out | single_source | |
| OEM-A-18 | Radiator fan control (FANCNTR) | low_side_out | T12-C1-3 | PWM 3 | low_side_out | single_source | |
| OEM-A-2 | Injector 4 | injector_out | T12-C1-25 | Injector 4 | injector_out | single_source | |
| OEM-A-20 | EVAP purge cut-off solenoid (PGS) | low_side_out | T12-C3-10 | PWM 8 | low_side_out | single_source | |
| OEM-A-21 | Ignition coil 1 | ignition_out | T12-C1-10 | Coil 1 | ignition_out | single_source | |
| OEM-A-22 | Ignition coil 2 | ignition_out | T12-C1-18 | Coil 2 | ignition_out | single_source | |
| OEM-A-23 | Power ground (PG1) | ground | T12-C1-13 + T12-C1-14 | Power Ground 1 + Power Ground 2 | ground | single_source | |
| OEM-A-24 | Power ground (PG2) | ground | T12-C1-13 + T12-C1-14 | Power Ground 1 + Power Ground 2 | ground | single_source | |
| OEM-A-25 | ECU power (IGP1) | power_in | T12-C1-31 | Ignition 12v In | power_in | single_source | |
| OEM-A-26 | Sensor ground (LG1) | sensor_ground | T12-C2-21 + T12-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-A-3 | Injector 2 | injector_out | T12-C1-17 | Injector 2 | injector_out | single_source | |
| OEM-A-4 | Injector 5 | injector_out | T12-C1-16 | Injector 5 | injector_out | corroborated | |
| OEM-A-5 | Injector 3 | injector_out | T12-C1-34 | Injector 3 | injector_out | single_source | |
| OEM-A-6 | Injector 6 | injector_out | T12-C1-15 | Injector 6 | injector_out | single_source | |
| OEM-A-7 | Main relay | low_side_out | T12-C3-22 | PWM 4 | low_side_out | single_source | |
| OEM-A-8 | Fuel pump relay 2 (FLR2) | low_side_out | T12-C1-5 | PWM 1 | low_side_out | single_source | |
| OEM-A-9 | Idle air control valve (IACV) | low_side_out | T12-C3-4 | PWM 9 | low_side_out | single_source | |
| OEM-B-10 | CYL 2M — CYP sensor 2 return | sensor_ground | T12-C2-21 + T12-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-B-11 | CYL 1P — CYP sensor 1 signal | trigger_in | T12-C2-22 | Cam 1 | trigger_in | single_source | |
| OEM-B-12 | CYL 1M — CYP sensor 1 return | sensor_ground | T12-C2-21 + T12-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-B-13 | CRNK 2P — TDC sensor signal | trigger_in | T12-C2-2 | Wheel 1 | digital_in | single_source | |
| OEM-B-14 | CRNK 2M — TDC sensor return | sensor_ground | T12-C2-21 + T12-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-B-15 | CRNK 1P — crank sensor signal | trigger_in | T12-C2-12 | Crank | trigger_in | single_source | |
| OEM-B-16 | CRNK 1M — crank sensor return | sensor_ground | T12-C2-21 + T12-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-B-2 | Chassis ground (LG2) | ground | T12-C1-13 + T12-C1-14 | Power Ground 1 + Power Ground 2 | ground | single_source | |
| OEM-B-3 | Ignition coil 6 | ignition_out | T12-C1-27 | Coil 6 | ignition_out | single_source | |
| OEM-B-4 | Ignition coil 5 | ignition_out | T12-C1-11 | Coil 5 | ignition_out | single_source | |
| OEM-B-6 | Ignition coil 4 | ignition_out | T12-C1-26 | Coil 4 | ignition_out | single_source | |
| OEM-B-7 | Neutral switch (M/T) / gear position (A/T) | digital_in | T12-C2-11 | Digital 3 | digital_in | single_source | |
| OEM-B-8 | Ignition coil 3 | ignition_out | T12-C1-1 | Coil 3 | ignition_out | single_source | |
| OEM-B-9 | CYL 2P — CYP sensor 2 signal | trigger_in | T12-C2-29 | Cam 2 | trigger_in | single_source | |
| OEM-C-1 | ECU power (IGP2) | power_in | T12-C1-31 | Ignition 12v In | power_in | single_source | |
| OEM-C-10 | Traction control | — | — | — | — | single_source | |
| OEM-C-11 | Starter switch (STS) | digital_in | T12-C2-14 | Digital 4 | digital_in | single_source | |
| OEM-C-12 | Traction control | — | — | — | — | single_source | |
| OEM-C-2 | Vehicle speed sensor (VSS) | digital_in | T12-C2-20 | Wheel 2 | digital_in | single_source | |
| OEM-C-3 | A/C switch (ACS) | digital_in | T12-C2-15 | Digital 5 | digital_in | single_source | |
| OEM-C-4 | Tachometer output (NEP) | tacho_out | T12-C3-28 | PWM 10 | low_side_out | single_source | |
| OEM-C-5 | A/C pressure switch (PDSW) | digital_in | T12-C2-27 | Digital 6 | digital_in | single_source | |
| OEM-C-6 | Traction control | — | — | — | — | single_source | |
| OEM-C-7 | Clutch switch (M/T) | digital_in | T12-C3-19 | Digital 7 | digital_in | single_source | |
| OEM-C-8 | Traction control | — | — | — | — | single_source | |
| OEM-C-9 | Service check connector (SCS) | digital_in | T12-C3-20 | Digital 8 | digital_in | single_source | |
| OEM-D-1 | Battery backup (VBU) | power_in | T12-C3-26 | Permanent 12v | power_in | single_source | |
| OEM-D-11 | Throttle position sensor (TPS) | analog_in | T12-C2-1 | Analogue 2 | analog_in | single_source | |
| OEM-D-12 | EGR lift sensor (EGRL) | analog_in | T12-C2-18 | Analogue 5 | analog_in | single_source | |
| OEM-D-13 | Engine coolant temperature (ECT) | temp_in | T12-C2-7 | Thermistor 1 | temp_in | single_source | |
| OEM-D-14 | Primary O2 sensor | lambda_nb_in | T12-C2-5 | Analogue 3 | analog_in | single_source | |
| OEM-D-15 | Intake air temperature (IAT) | temp_in | T12-C2-25 | Thermistor 2 | temp_in | single_source | |
| OEM-D-16 | Secondary O2 sensor | lambda_nb_in | T12-C2-6 | Analogue 4 | analog_in | single_source | |
| OEM-D-17 | MAP sensor | analog_in | T12-C2-10 | Analogue 1 | analog_in | single_source | |
| OEM-D-18 | +5V sensor supply (VCC) | vref | T12-C2-24 | 5v Output | vref | single_source | |
| OEM-D-19 | +5V sensor supply (VCC) | vref | T12-C2-24 | 5v Output | vref | single_source | |
| OEM-D-20 | +5V sensor supply (VCC) | vref | T12-C2-24 | 5v Output | vref | single_source | |
| OEM-D-21 | Sensor ground (SG) | sensor_ground | T12-C2-21 + T12-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-D-22 | Sensor ground (SG) | sensor_ground | T12-C2-21 + T12-C2-33 | Sensor Ground + Sensor Ground | sensor_ground | single_source | |
| OEM-D-3 | Knock sensor — rear | knock_in | T12-C3-32 | Knock 2 | knock_in | single_source | |
| OEM-D-4 | Knock sensor — front | knock_in | T12-C3-31 | Knock 1 | knock_in | single_source | |
| OEM-D-5 | Traction control | — | — | — | — | single_source | |
| OEM-D-6 | Fuel pump voltage monitor (VFP) | — | — | — | — | corroborated | |
| OEM-D-8 | Ignition timing adjuster (IGADJ) | digital_in | T12-C3-21 | Digital 9 | digital_in | single_source | |
| OEM-D-9 | Alternator FR signal | digital_in | T12-C2-31 | Wheel 3 | digital_in | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-A-25 | SP-14V-1 | 0.85 | no route | ECU power (IGP1) | — | |
| W2 | OEM-C-1 | SP-14V-1 | 0.85 | no route | ECU power (IGP2) | — | |
| W3 | SP-14V-1 | T12-C1-31 | 0.85 | no route | Ignition 12v In | — | |
| W4 | OEM-D-1 | T12-C3-26 | 0.85 | no route | Battery backup (VBU) | — | |
| W5 | OEM-A-23 | SP-GND-1 | 0.85 | no route | Power ground (PG1) | — | |
| W6 | OEM-A-24 | SP-GND-1 | 0.85 | no route | Power ground (PG2) | — | |
| W7 | OEM-B-2 | SP-GND-1 | 0.85 | no route | Chassis ground (LG2) | — | |
| W8 | SP-GND-1 | T12-C1-13 | 0.85 | no route | Power Ground 1 | — | |
| W9 | SP-GND-1 | T12-C1-14 | 0.85 | no route | Power Ground 2 | — | |
| W10 | OEM-A-26 | SP-0V-1 | 0.5 | no route | Sensor ground (LG1) | — | |
| W11 | OEM-B-10 | SP-0V-1 | 0.5 | no route | CYL 2M — CYP sensor 2 return | — | |
| W12 | OEM-B-12 | SP-0V-1 | 0.5 | no route | CYL 1M — CYP sensor 1 return | — | |
| W13 | OEM-B-14 | SP-0V-1 | 0.5 | no route | CRNK 2M — TDC sensor return | — | |
| W14 | OEM-B-16 | SP-0V-1 | 0.5 | no route | CRNK 1M — crank sensor return | — | |
| W15 | OEM-D-21 | SP-0V-1 | 0.5 | no route | Sensor ground (SG) | — | |
| W16 | OEM-D-22 | SP-0V-1 | 0.5 | no route | Sensor ground (SG) | — | |
| W17 | SP-0V-1 | T12-C2-21 | 0.5 | no route | Sensor Ground | — | |
| W18 | SP-0V-1 | T12-C2-33 | 0.5 | no route | Sensor Ground | — | |
| W19 | OEM-D-18 | SP-5V1-1 | 0.5 | no route | +5V sensor supply (VCC) | — | |
| W20 | OEM-D-19 | SP-5V1-1 | 0.5 | no route | +5V sensor supply (VCC) | — | |
| W21 | OEM-D-20 | SP-5V1-1 | 0.5 | no route | +5V sensor supply (VCC) | — | |
| W22 | SP-5V1-1 | T12-C2-24 | 0.5 | no route | 5v Output | — | |
| W23 | OEM-B-15 | T12-C2-12 | 0.5 | no route | CRNK 1P — crank sensor signal | — | |
| W24 | OEM-B-13 | T12-C2-2 | 0.5 | no route | CRNK 2P — TDC sensor signal | — | |
| W25 | OEM-B-11 | T12-C2-22 | 0.5 | no route | CYL 1P — CYP sensor 1 signal | — | |
| W26 | OEM-B-9 | T12-C2-29 | 0.5 | no route | CYL 2P — CYP sensor 2 signal | — | |
| W27 | OEM-D-4 | T12-C3-31 | 0.5 | no route | Knock sensor — front | — | |
| W28 | OEM-D-3 | T12-C3-32 | 0.5 | no route | Knock sensor — rear | — | |
| W29 | OEM-A-21 | T12-C1-10 | 0.5 | no route | Ignition coil 1 | — | |
| W30 | OEM-A-22 | T12-C1-18 | 0.5 | no route | Ignition coil 2 | — | |
| W31 | OEM-B-8 | T12-C1-1 | 0.5 | no route | Ignition coil 3 | — | |
| W32 | OEM-B-6 | T12-C1-26 | 0.5 | no route | Ignition coil 4 | — | |
| W33 | OEM-B-4 | T12-C1-11 | 0.5 | no route | Ignition coil 5 | — | |
| W34 | OEM-B-3 | T12-C1-27 | 0.5 | no route | Ignition coil 6 | — | |
| W35 | OEM-A-1 | T12-C1-9 | 0.5 | no route | Injector 1 | — | |
| W36 | OEM-A-3 | T12-C1-17 | 0.5 | no route | Injector 2 | — | |
| W37 | OEM-A-5 | T12-C1-34 | 0.5 | no route | Injector 3 | — | |
| W38 | OEM-A-2 | T12-C1-25 | 0.5 | no route | Injector 4 | — | |
| W39 | OEM-A-4 | T12-C1-16 | 0.5 | no route | Injector 5 | — | |
| W40 | OEM-A-6 | T12-C1-15 | 0.5 | no route | Injector 6 | — | |
| W41 | OEM-A-8 | T12-C1-5 | 0.5 | no route | Fuel pump relay 2 (FLR2) | — | |
| W42 | OEM-A-15 | T12-C1-4 | 0.5 | no route | A/C clutch relay (ACC) | — | |
| W43 | OEM-A-18 | T12-C1-3 | 0.5 | no route | Radiator fan control (FANCNTR) | — | |
| W44 | OEM-A-7 | T12-C3-22 | 0.5 | no route | Main relay | — | |
| W45 | OEM-5-F5 | T12-C1-6 | 0.5 | no route | Front VTEC solenoid valve | — | |
| W46 | OEM-5-F7 | T12-C1-7 | 0.5 | no route | Rear VTEC solenoid valve | — | |
| W47 | OEM-A-10 | T12-C3-9 | 0.5 | no route | Front O2 sensor heater (HTCNTF) | — | |
| W48 | OEM-A-12 | T12-C3-3 | 0.5 | no route | Rear O2 sensor heater (HTCNTR) | — | |
| W49 | OEM-A-11 | T12-C3-23 | 0.5 | no route | EGR control solenoid | — | |
| W50 | OEM-A-13 | T12-C3-24 | 0.5 | no route | Check engine light (WARN) | — | |
| W51 | OEM-A-14 | T12-C3-25 | 0.5 | no route | Chamber volume control solenoid (BPS) | — | |
| W52 | OEM-A-20 | T12-C3-10 | 0.5 | no route | EVAP purge cut-off solenoid (PGS) | — | |
| W53 | OEM-A-9 | T12-C3-4 | 0.5 | no route | Idle air control valve (IACV) | — | |
| W54 | OEM-C-4 | T12-C3-28 | 0.5 | no route | Tachometer output (NEP) | — | |
| W55 | OEM-D-17 | T12-C2-10 | 0.5 | no route | MAP sensor | — | |
| W56 | OEM-D-11 | T12-C2-1 | 0.5 | no route | Throttle position sensor (TPS) | — | |
| W57 | OEM-D-14 | T12-C2-5 | 0.5 | no route | Primary O2 sensor | — | |
| W58 | OEM-D-16 | T12-C2-6 | 0.5 | no route | Secondary O2 sensor | — | |
| W59 | OEM-D-13 | T12-C2-7 | 0.5 | no route | Engine coolant temperature (ECT) | — | |
| W60 | OEM-D-15 | T12-C2-25 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W61 | OEM-D-12 | T12-C2-18 | 0.5 | no route | EGR lift sensor (EGRL) | — | |
| W62 | OEM-C-2 | T12-C2-20 | 0.5 | no route | Vehicle speed sensor (VSS) | — | |
| W63 | OEM-D-9 | T12-C2-31 | 0.5 | no route | Alternator FR signal | — | |
| W64 | OEM-5-F2 | T12-C2-4 | 0.5 | no route | Front VTEC pressure switch | — | |
| W65 | OEM-5-F4 | T12-C2-8 | 0.5 | no route | Rear VTEC pressure switch | — | |
| W66 | OEM-B-7 | T12-C2-11 | 0.5 | no route | Neutral switch (M/T) / gear position (A/T) | — | |
| W67 | OEM-C-11 | T12-C2-14 | 0.5 | no route | Starter switch (STS) | — | |
| W68 | OEM-C-3 | T12-C2-15 | 0.5 | no route | A/C switch (ACS) | — | |
| W69 | OEM-C-5 | T12-C2-27 | 0.5 | no route | A/C pressure switch (PDSW) | — | |
| W70 | OEM-C-7 | T12-C3-19 | 0.5 | no route | Clutch switch (M/T) | — | |
| W71 | OEM-C-9 | T12-C3-20 | 0.5 | no route | Service check connector (SCS) | — | |
| W72 | OEM-D-8 | T12-C3-21 | 0.5 | no route | Ignition timing adjuster (IGADJ) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 4-1437290-0 | TE | Superseal 1.0 34-way plug, Key 1 | 3.000 | ea |
| terminal | 3-1447221-4 | TE | Superseal 1.0 socket terminal, 20 AWG (0.5 sq mm) | 57.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (7)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | INJECTOR_BALLAST | T12 | The C30A injectors (NSX fuel injector) are low-impedance, but T12 drives saturated (high-Z) injectors only. Add a ballast resistor pack in series with each injector, or use an ECU with low-Z / peak-and-hold injector drivers. |
| error | PHYS_REQUIRED_OPEN | T12-C3-27 | T12-C3-27 "Permanent 12v" is required but not wired. |
| warn | NET_FAMILY | OEM-5-F5 ↔ T12-C1-6 | OEM-5-F5 "Front VTEC solenoid valve" [high_side_out] is wired to T12-C1-6 "Motor 1 +" [hbridge_out]. A half-bridge can act as a high-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-5-F7 ↔ T12-C1-7 | OEM-5-F7 "Rear VTEC solenoid valve" [high_side_out] is wired to T12-C1-7 "Motor 1 -" [hbridge_out]. A half-bridge can act as a high-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-B-13 ↔ T12-C2-2 | OEM-B-13 "CRNK 2P — TDC sensor signal" [trigger_in] is wired to T12-C2-2 "Wheel 1" [digital_in]. Hall-type cam/speed signals can use a digital input if it handles the frequency; VR signals cannot. |
| info | NET_FAMILY | OEM-C-4 ↔ T12-C3-28 | OEM-C-4 "Tachometer output (NEP)" [tacho_out] is wired to T12-C3-28 "PWM 10" [low_side_out]. Tacho as a low-side output: check the tach needs a pull-up. |
| info | UNMAPPED | OEM | 6 optional OEM pins are not mapped: OEM-C-10 Traction control; OEM-C-12 Traction control; OEM-C-6 Traction control; OEM-C-8 Traction control; OEM-D-5 Traction control; OEM-D-6 Fuel pump voltage monitor (VFP) |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Auto-mapped by auto_map() from the library pin data on 2026-10-09. Review every wire against both manuals before building. Open items: - T12-C3 27: Permanent 12v: required by DTAFast T12 but no stock pin feeds it; wire by hand Not wired: - OEM-C 10: Traction control: not classified in the library; wire by hand - OEM-C 12: Traction control: not classified in the library; wire by hand - OEM-C 6: Traction control: not classified in the library; wire by hand - OEM-C 8: Traction control: not classified in the library; wire by hand - OEM-D 5: Traction control: not classified in the library; wire by hand - OEM-D 6: Fuel pump voltage monitor (VFP): not classified in the library; wire by hand
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | AEM EMS 30-1042 (Series 1) plug-and-play install manual — 1991-94 NSX | https://fancy-craft.firebaseapp.com/NSX/report/ecu/EMS_-_30-1042.pdf | archive | 2026-10-05 | 0cad10bc64b5 |
| 4 | vendor_doc | DTAFast T12+ ECU wiring diagram (served for T12 and T12+) | https://cdn.shopify.com/s/files/1/0848/7508/4108/files/T12PLUS_Wiring-Diagram.pdf?v=1728572014 | — | — | — |
| 3 | vendor_doc | dodo-upgrades: Honda OBD1 V6 ECU pinout | https://dodo-upgrades.nl/index.php/obd1-v6-pinouts/ | archive | 2026-10-05 | f9539af28904 |