Honda NSX NA2 1997-2005 (C32B) → Emtron SL4 (auto)
Honda NSX NA2 1997-2005 (C32B) — Emtron — SL4
⚠ 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 | 9: read the Findings page before cutting any wire |
| Size of the job | 69 wires · 12 connectors · 3 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-13 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-C-1 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-G-10 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-G-2 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-G-3 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-G-9 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-14V-1 | SL4-A-34 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-14V-1 | SL4-B-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-A-12 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-A-25 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-G-7 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-G-8 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | SP-GND-1 | SL4-B-18 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-GND-1 | SL4-B-26 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-A-26 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-B-13 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-B-14 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-B-15 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-B-16 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-B-9 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-D-11 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-F-15 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-F-2 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | SP-0V-1 | SL4-B-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-D-10 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-F-1 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-F-14 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | SP-5V1-1 | SL4-B-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-B-8 | SL4-B-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | SP-0V-1 | SL4-B-6 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-B-6 | SL4-B-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | SP-0V-1 | SL4-B-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-D-13 | SL4-B-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-D-2 | SL4-B-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-A-11 | SL4-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-A-24 | SL4-A-27 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-B-12 | SL4-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-B-11 | SL4-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-A-1 | SL4-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-A-2 | SL4-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-A-3 | SL4-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-A-14 | SL4-A-4 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A-15 | SL4-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A-16 | SL4-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-A-5 | SL4-B-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-F-19 | SL4-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-F-20 | SL4-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-D-9 | SL4-B-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-F-13 | SL4-B-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-F-12 | SL4-B-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-D-12 | SL4-B-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-D-7 | SL4-B-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-F-4 | SL4-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-A-8 | SL4-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-A-10 | SL4-A-10 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-A-22 | SL4-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-A-23 | SL4-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-A-9 | SL4-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-D-16 | SL4-B-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-D-17 | SL4-B-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-D-18 | SL4-B-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-D-19 | SL4-B-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W63 | OEM-D-8 | SL4-B-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W64 | OEM-C-7 | SL4-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W65 | OEM-F-16 | SL4-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W66 | OEM-F-6 | SL4-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W67 | OEM-B-1 | SL4-A-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W68 | OEM-B-3 | SL4-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W69 | OEM-B-4 | SL4-A-25 | 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 | SL4-A-34 | SL4-B-10 | open (OL) | +12 V supply must not touch sensor ground | |
| 2 | SL4-A-34 | SL4-B-2 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 3 | SL4-B-10 | SL4-B-2 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 4 | SL4-B-18 | SL4-A-34 | open (OL) | power ground must not touch +12 V supply | |
| 5 | SL4-B-18 | SL4-B-2 | open (OL) | power 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
OEM-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 1 (INJ1) | — | W39 | — | 0.5 | SL4-A-1 | — | — | — |
| 10 | Rear secondary O2 heater (RSO2SHTC) | — | W55 | — | 0.5 | SL4-A-10 | — | — | — |
| 11 | Ignition coil 1 (IGN COIL1) | — | W35 | — | 0.5 | SL4-A-26 | — | — | — |
| 12 | Power ground (PG1) | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
| 13 | ECM power source (IGP1) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 14 | Injector 4 (INJ4) | — | W42 | — | 0.5 | SL4-A-4 | — | — | — |
| 15 | Injector 5 (INJ5) | — | W43 | — | 0.5 | SL4-A-1 | — | — | — |
| 16 | Injector 6 (INJ6) | — | W44 | — | 0.5 | SL4-A-2 | — | — | — |
| 17 | EVAP bypass solenoid (2WBS) | — | — | — | — | — | — | — | — |
| 2 | Injector 2 (INJ2) | — | W40 | — | 0.5 | SL4-A-2 | — | — | — |
| 20 | IAB control solenoid (IABCS) | — | — | — | — | — | — | — | — |
| 21 | EVAP purge control solenoid (PCS) | — | — | — | — | — | — | — | — |
| 22 | Front primary O2 heater (FPO2SHTC) | — | W56 | — | 0.5 | SL4-A-11 | — | — | — |
| 23 | Rear primary O2 heater (RPO2SHTC) | — | W57 | — | 0.5 | SL4-A-12 | — | — | — |
| 24 | Ignition coil 2 (IGN COIL2) | — | W36 | — | 0.5 | SL4-A-27 | — | — | — |
| 25 | Power ground (PG2) | — | W10 | — | 0.85 | SP-GND-1 | — | — | — |
| 26 | Logic ground (LG1) | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 3 | Injector 3 (INJ3) | — | W41 | — | 0.5 | SL4-A-3 | — | — | — |
| 4 | EVAP canister vent shut valve (VSV) | — | — | — | — | — | — | — | — |
| 5 | Fuel pump relay (FLR1) | — | W45 | — | 0.5 | SL4-B-3 | — | — | — |
| 6 | EGR control solenoid (ESOL) | — | — | — | — | — | — | — | — |
| 7 | Malfunction indicator lamp (MIL) | — | — | — | — | — | — | — | — |
| 8 | A/C clutch relay (ACC) | — | W54 | — | 0.5 | SL4-A-17 | — | — | — |
| 9 | Front secondary O2 heater (FSO2SHTC) | — | W58 | — | 0.5 | SL4-A-13 | — | — | — |
OEM-B
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | VTEC pressure switch front (VTP SWF) | — | W67 | — | 0.5 | SL4-A-23 | — | — | — |
| 10 | Ignition coil 5 (IGN COIL5) | — | — | — | — | — | — | — | — |
| 11 | Ignition coil 4 (IGN COIL4) | — | W38 | — | 0.5 | SL4-A-29 | — | — | — |
| 12 | Ignition coil 3 (IGN COIL3) | — | W37 | — | 0.5 | SL4-A-28 | — | — | — |
| 13 | Cylinder position sensor 2 return (CYP 2M) | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 14 | Cylinder position sensor 1 return (CYP 1M) | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 15 | Crank position sensor 2 return (CKP 2M) | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Crank position sensor 1 return (CKP 1M) | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 2 | Ignition coil 6 (IGN COIL6) | — | — | — | — | — | — | — | — |
| 3 | VTEC pressure switch rear (VTP SWR) | — | W68 | — | 0.5 | SL4-A-24 | — | — | — |
| 4 | Neutral switch (NT SW, M/T) | — | W69 | — | 0.5 | SL4-A-25 | — | — | — |
| 5 | Cylinder position sensor 2 + (CYP 2P) | — | — | — | — | — | — | — | — |
| 6 | Cylinder position sensor 1 + (CYP 1P) | — | W31 | — | 0.5 | SL4-B-7 | — | — | — |
| 7 | Crank position sensor 2 + (CKP 2P) | — | — | — | — | — | — | — | — |
| 8 | Crank position sensor 1 + (CKP 1P) | — | W29 | — | 0.5 | SL4-B-5 | — | — | — |
| 9 | Logic ground (LG2) | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
OEM-C
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECM power source (IGP2) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Clutch switch (MTCLS, M/T) | — | — | — | — | — | — | — | — |
| 6 | Starter switch (STS) | — | — | — | — | — | — | — | — |
| 7 | Vehicle speed sensor (VSS) | — | W64 | — | 0.5 | SL4-A-20 | — | — | — |
| 8 | Engine speed pulse (NEP) | — | — | — | — | — | — | — | — |
OEM-D
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Backup power (VBU) | — | — | — | — | — | — | — | — |
| 10 | Sensor 5V supply (VCC2) | — | W25 | — | 0.5 | SP-5V1-1 | — | — | — |
| 11 | Sensor ground (SG2) | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 12 | Throttle position sensor (TPS) | — | W51 | — | 0.5 | SL4-B-14 | — | — | — |
| 13 | Knock sensor front (KSF) | — | W33 | — | 0.5 | SL4-B-16 | — | — | — |
| 16 | Front secondary O2 signal (O2S FS) | — | W59 | — | 0.5 | SL4-B-19 | — | — | — |
| 17 | Rear secondary O2 signal (O2S RS) | — | W60 | — | 0.5 | SL4-B-20 | — | — | — |
| 18 | Front primary O2 signal (O2S FP) | — | W61 | — | 0.5 | SL4-B-21 | — | — | — |
| 19 | Rear primary O2 signal (O2S RP) | — | W62 | — | 0.5 | SL4-B-22 | — | — | — |
| 2 | Knock sensor rear (KSR) | — | W34 | — | 0.5 | SL4-B-24 | — | — | — |
| 20 | EGR valve lift sensor (EGRL) | — | — | — | — | — | — | — | — |
| 4 | K-line diagnostics | — | — | — | — | — | — | — | — |
| 7 | Engine coolant temperature (ECT) | — | W52 | — | 0.5 | SL4-B-15 | — | — | — |
| 8 | Intake air temperature (IAT) | — | W63 | — | 0.5 | SL4-B-23 | — | — | — |
| 9 | MAP sensor | — | W48 | — | 0.5 | SL4-B-11 | — | — | — |
OEM-F
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Sensor 5V supply (VCC1) | — | W26 | — | 0.5 | SP-5V1-1 | — | — | — |
| 12 | Accelerator pedal position 2 (AP2) | — | W50 | — | 0.5 | SL4-B-13 | — | — | — |
| 13 | Accelerator pedal position 1 (AP1) | — | W49 | — | 0.5 | SL4-B-12 | — | — | — |
| 14 | Accelerator pedal 5V supply (VCC3) | — | W27 | — | 0.5 | SP-5V1-1 | — | — | — |
| 15 | Accelerator pedal ground (SG3) | — | W22 | — | 0.5 | SP-0V-1 | — | — | — |
| 16 | Brake switch 1 (BKSW1) | — | W65 | — | 0.5 | SL4-A-21 | — | — | — |
| 19 | VTEC solenoid front (VT SOLF) | — | W46 | — | 0.5 | SL4-A-14 | — | — | — |
| 2 | Sensor ground (SG1) | — | W23 | — | 0.5 | SP-0V-1 | — | — | — |
| 20 | VTEC solenoid rear (VT SOLR) | — | W47 | — | 0.5 | SL4-A-15 | — | — | — |
| 4 | Fuel pump relay 2 (FLR2) | — | W53 | — | 0.5 | SL4-A-16 | — | — | — |
| 6 | Brake switch 2 (BKSW2) | — | W66 | — | 0.5 | SL4-A-22 | — | — | — |
OEM-G
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | Throttle motor common power phases 2&4 (COM2) | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
| 11 | Throttle motor phase 3 (PM3) | — | — | — | — | — | — | — | — |
| 12 | Throttle motor phase 4 (PM4) | — | — | — | — | — | — | — | — |
| 2 | Throttle motor power source 1 (IGM1) | — | W4 | — | 0.85 | SP-14V-1 | — | — | — |
| 3 | Throttle motor power source 2 (IGM2) | — | W5 | — | 0.85 | SP-14V-1 | — | — | — |
| 4 | Throttle motor phase 1 (PM1) | — | — | — | — | — | — | — | — |
| 5 | Throttle motor phase 2 (PM2) | — | — | — | — | — | — | — | — |
| 7 | Throttle motor ground 1 (PGM1) | — | W11 | — | 0.85 | SP-GND-1 | — | — | — |
| 8 | Throttle motor ground 2 (PGM2) | — | W12 | — | 0.85 | SP-GND-1 | — | — | — |
| 9 | Throttle motor common power phases 1&3 (COM1) | — | W6 | — | 0.85 | SP-14V-1 | — | — | — |
SL4-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injection channel 1 | — | W43 | — | 0.5 | OEM-A-15 | — | — | — |
| 1 | Injection channel 1 | — | W39 | — | 0.5 | OEM-A-1 | — | — | — |
| 2 | Injection channel 2 | — | W40 | — | 0.5 | OEM-A-2 | — | — | — |
| 2 | Injection channel 2 | — | W44 | — | 0.5 | OEM-A-16 | — | — | — |
| 3 | Injection channel 3 | — | W41 | — | 0.5 | OEM-A-3 | — | — | — |
| 4 | Injection channel 4 | — | W42 | — | 0.5 | OEM-A-14 | — | — | — |
| 5 | NC | — | — | — | — | — | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Sensor supply 8V | — | — | — | — | — | — | — | — |
| 10 | Auxiliary output 1 | — | W55 | — | 0.5 | OEM-A-10 | — | — | — |
| 11 | Auxiliary output 2 | — | W56 | — | 0.5 | OEM-A-22 | — | — | — |
| 12 | Auxiliary output 3 | — | W57 | — | 0.5 | OEM-A-23 | — | — | — |
| 13 | Auxiliary output 4 | — | W58 | — | 0.5 | OEM-A-9 | — | — | — |
| 14 | Auxiliary output 5 | — | W46 | — | 0.5 | OEM-F-19 | — | — | — |
| 15 | Auxiliary output 6 | — | W47 | — | 0.5 | OEM-F-20 | — | — | — |
| 16 | Auxiliary output 7 | — | W53 | — | 0.5 | OEM-F-4 | — | — | — |
| 17 | Auxiliary output 8 | — | W54 | — | 0.5 | OEM-A-8 | — | — | — |
| 18 | Auxiliary output 9 | — | — | — | — | — | — | — | — |
| 19 | Auxiliary output 10 | — | — | — | — | — | — | — | — |
| 20 | Digital input 1 | — | W64 | — | 0.5 | OEM-C-7 | — | — | — |
| 21 | Digital input 2 | — | W65 | — | 0.5 | OEM-F-16 | — | — | — |
| 22 | Digital input 3 | — | W66 | — | 0.5 | OEM-F-6 | — | — | — |
| 23 | Digital input 4 | — | W67 | — | 0.5 | OEM-B-1 | — | — | — |
| 24 | Digital input 5 | — | W68 | — | 0.5 | OEM-B-3 | — | — | — |
| 25 | Digital input 6 | — | W69 | — | 0.5 | OEM-B-4 | — | — | — |
| 26 | Ignition channel 1 | — | W35 | — | 0.5 | OEM-A-11 | — | — | — |
| 27 | Ignition channel 2 | — | W36 | — | 0.5 | OEM-A-24 | — | — | — |
| 28 | Ignition channel 3 | — | W37 | — | 0.5 | OEM-B-12 | — | — | — |
| 29 | Ignition channel 4 | — | W38 | — | 0.5 | OEM-B-11 | — | — | — |
| 30 | NC | — | — | — | — | — | — | — | — |
| 31 | NC | — | — | — | — | — | — | — | — |
| 32 | NC | — | — | — | — | — | — | — | — |
| 33 | NC | — | — | — | — | — | — | — | — |
| 34 | Aux 9–10 14V supply | — | W7 | — | 0.85 | SP-14V-1 | — | — | — |
SL4-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ECU 14V supply | — | W8 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | Sensor supply Vref1 5.0V | — | W28 | — | 0.5 | SP-5V1-1 | — | — | — |
| 3 | EFI relay output (low side, 200 mA) | — | W45 | — | 0.5 | OEM-A-5 | — | — | — |
| 4 | Ignition switch input | — | — | — | — | — | — | — | — |
| 5 | Crank index sensor + | — | W29 | — | 0.5 | OEM-B-8 | — | — | — |
| 6 | Crank index sensor − | — | W30 | — | 0.5 | SP-0V-1 | — | — | — |
| 7 | Sync sensor + | — | W31 | — | 0.5 | OEM-B-6 | — | — | — |
| 8 | Sync sensor − | — | W32 | — | 0.5 | SP-0V-1 | — | — | — |
| 9 | Shield (crank/sync/knock) | — | — | — | — | — | — | — | — |
| 10 | Analog sensor 0V reference | — | W24 | — | 0.5 | SP-0V-1 | — | — | — |
| 11 | Analog input 1 | — | W48 | — | 0.5 | OEM-D-9 | — | — | — |
| 12 | Analog input 2 | — | W49 | — | 0.5 | OEM-F-13 | — | — | — |
| 13 | Analog input 3 | — | W50 | — | 0.5 | OEM-F-12 | — | — | — |
| 14 | Analog input 4 | — | W51 | — | 0.5 | OEM-D-12 | — | — | — |
| 15 | Analog input 5 | — | W52 | — | 0.5 | OEM-D-7 | — | — | — |
| 16 | Knock 1 + | — | W33 | — | 0.5 | OEM-D-13 | — | — | — |
| 17 | Knock 1 − | — | — | — | — | — | — | — | — |
| 18 | ECU ground | — | W13 | — | 0.85 | SP-GND-1 | — | — | — |
| 19 | Analog input 6 | — | W59 | — | 0.5 | OEM-D-16 | — | — | — |
| 20 | Analog input 7 (switchable 1k pull-up) | — | W60 | — | 0.5 | OEM-D-17 | — | — | — |
| 21 | Analog input 8 (switchable 1k pull-up) | — | W61 | — | 0.5 | OEM-D-18 | — | — | — |
| 22 | Analog input 9 (switchable 1k pull-up) | — | W62 | — | 0.5 | OEM-D-19 | — | — | — |
| 23 | Analog input 10 (switchable 1k pull-up) | — | W63 | — | 0.5 | OEM-D-8 | — | — | — |
| 24 | Knock 2 + | — | W34 | — | 0.5 | OEM-D-2 | — | — | — |
| 25 | Knock 2 − | — | — | — | — | — | — | — | — |
| 26 | ECU ground | — | W14 | — | 0.85 | SP-GND-1 | — | — | — |
| 27 | CAN 1 H | — | — | — | — | — | — | — | — |
| 28 | CAN 1 L | — | — | — | — | — | — | — | — |
| 29 | NC | — | — | — | — | — | — | — | — |
| 30 | NC | — | — | — | — | — | — | — | — |
| 31 | Ethernet Tx + | — | — | — | — | — | — | — | — |
| 32 | Ethernet Tx − | — | — | — | — | — | — | — | — |
| 33 | Ethernet Rx + | — | — | — | — | — | — | — | — |
| 34 | Ethernet Rx − | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W32 | — | 0.5 | SL4-B-8 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-A-26 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-B-13 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | OEM-B-14 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | OEM-B-15 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | OEM-B-16 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | OEM-B-9 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | OEM-D-11 | — | — | — |
| 1 | — | — | W22 | — | 0.5 | OEM-F-15 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | OEM-F-2 | — | — | — |
| 1 | — | — | W24 | — | 0.5 | SL4-B-10 | — | — | — |
| 1 | — | — | W30 | — | 0.5 | SL4-B-6 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-A-13 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-C-1 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | OEM-G-10 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | OEM-G-2 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-G-3 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-G-9 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | SL4-A-34 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | SL4-B-1 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W25 | — | 0.5 | OEM-D-10 | — | — | — |
| 1 | — | — | W26 | — | 0.5 | OEM-F-1 | — | — | — |
| 1 | — | — | W27 | — | 0.5 | OEM-F-14 | — | — | — |
| 1 | — | — | W28 | — | 0.5 | SL4-B-2 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W9 | — | 0.85 | OEM-A-12 | — | — | — |
| 1 | — | — | W10 | — | 0.85 | OEM-A-25 | — | — | — |
| 1 | — | — | W11 | — | 0.85 | OEM-G-7 | — | — | — |
| 1 | — | — | W12 | — | 0.85 | OEM-G-8 | — | — | — |
| 1 | — | — | W13 | — | 0.85 | SL4-B-18 | — | — | — |
| 1 | — | — | W14 | — | 0.85 | SL4-B-26 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1 | Injector 1 (INJ1) | injector_out | SL4-A-1 | Injection channel 1 | injector_out | single_source | |
| OEM-A-10 | Rear secondary O2 heater (RSO2SHTC) | low_side_out | SL4-A-10 | Auxiliary output 1 | switch_out | single_source | |
| OEM-A-11 | Ignition coil 1 (IGN COIL1) | ignition_out | SL4-A-26 | Ignition channel 1 | ignition_out | single_source | |
| OEM-A-12 | Power ground (PG1) | ground | SL4-B-18 + SL4-B-26 | ECU ground + ECU ground | ground | single_source | |
| OEM-A-13 | ECM power source (IGP1) | power_in | SL4-A-34 + SL4-B-1 | Aux 9–10 14V supply + ECU 14V supply | power_in | single_source | |
| OEM-A-14 | Injector 4 (INJ4) | injector_out | SL4-A-4 | Injection channel 4 | injector_out | single_source | |
| OEM-A-15 | Injector 5 (INJ5) | injector_out | SL4-A-1 | Injection channel 1 | injector_out | single_source | |
| OEM-A-16 | Injector 6 (INJ6) | injector_out | SL4-A-2 | Injection channel 2 | injector_out | single_source | |
| OEM-A-17 | EVAP bypass solenoid (2WBS) | low_side_out | — | — | — | single_source | |
| OEM-A-2 | Injector 2 (INJ2) | injector_out | SL4-A-2 | Injection channel 2 | injector_out | single_source | |
| OEM-A-20 | IAB control solenoid (IABCS) | low_side_out | — | — | — | single_source | |
| OEM-A-21 | EVAP purge control solenoid (PCS) | low_side_out | — | — | — | single_source | |
| OEM-A-22 | Front primary O2 heater (FPO2SHTC) | low_side_out | SL4-A-11 | Auxiliary output 2 | switch_out | single_source | |
| OEM-A-23 | Rear primary O2 heater (RPO2SHTC) | low_side_out | SL4-A-12 | Auxiliary output 3 | switch_out | single_source | |
| OEM-A-24 | Ignition coil 2 (IGN COIL2) | ignition_out | SL4-A-27 | Ignition channel 2 | ignition_out | single_source | |
| OEM-A-25 | Power ground (PG2) | ground | SL4-B-18 + SL4-B-26 | ECU ground + ECU ground | ground | single_source | |
| OEM-A-26 | Logic ground (LG1) | sensor_ground | SL4-B-10 + SL4-B-6 + SL4-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-A-3 | Injector 3 (INJ3) | injector_out | SL4-A-3 | Injection channel 3 | injector_out | single_source | |
| OEM-A-4 | EVAP canister vent shut valve (VSV) | low_side_out | — | — | — | single_source | |
| OEM-A-5 | Fuel pump relay (FLR1) | low_side_out | SL4-B-3 | EFI relay output (low side, 200 mA) | low_side_out | single_source | |
| OEM-A-6 | EGR control solenoid (ESOL) | low_side_out | — | — | — | single_source | |
| OEM-A-7 | Malfunction indicator lamp (MIL) | low_side_out | — | — | — | single_source | |
| OEM-A-8 | A/C clutch relay (ACC) | low_side_out | SL4-A-17 | Auxiliary output 8 | switch_out | single_source | |
| OEM-A-9 | Front secondary O2 heater (FSO2SHTC) | low_side_out | SL4-A-13 | Auxiliary output 4 | switch_out | single_source | |
| OEM-B-1 | VTEC pressure switch front (VTP SWF) | digital_in | SL4-A-23 | Digital input 4 | digital_in | single_source | |
| OEM-B-10 | Ignition coil 5 (IGN COIL5) | ignition_out | — | — | — | single_source | |
| OEM-B-11 | Ignition coil 4 (IGN COIL4) | ignition_out | SL4-A-29 | Ignition channel 4 | ignition_out | single_source | |
| OEM-B-12 | Ignition coil 3 (IGN COIL3) | ignition_out | SL4-A-28 | Ignition channel 3 | ignition_out | single_source | |
| OEM-B-13 | Cylinder position sensor 2 return (CYP 2M) | sensor_ground | SL4-B-10 + SL4-B-6 + SL4-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-B-14 | Cylinder position sensor 1 return (CYP 1M) | sensor_ground | SL4-B-10 + SL4-B-6 + SL4-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-B-15 | Crank position sensor 2 return (CKP 2M) | sensor_ground | SL4-B-10 + SL4-B-6 + SL4-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-B-16 | Crank position sensor 1 return (CKP 1M) | sensor_ground | SL4-B-10 + SL4-B-6 + SL4-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-B-2 | Ignition coil 6 (IGN COIL6) | ignition_out | — | — | — | single_source | |
| OEM-B-3 | VTEC pressure switch rear (VTP SWR) | digital_in | SL4-A-24 | Digital input 5 | digital_in | single_source | |
| OEM-B-4 | Neutral switch (NT SW, M/T) | digital_in | SL4-A-25 | Digital input 6 | digital_in | single_source | |
| OEM-B-5 | Cylinder position sensor 2 + (CYP 2P) | trigger_in | — | — | — | single_source | |
| OEM-B-6 | Cylinder position sensor 1 + (CYP 1P) | trigger_in | SL4-B-7 | Sync sensor + | trigger_in | single_source | |
| OEM-B-7 | Crank position sensor 2 + (CKP 2P) | trigger_in | — | — | — | single_source | |
| OEM-B-8 | Crank position sensor 1 + (CKP 1P) | trigger_in | SL4-B-5 | Crank index sensor + | trigger_in | single_source | |
| OEM-B-9 | Logic ground (LG2) | sensor_ground | SL4-B-10 + SL4-B-6 + SL4-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-C-1 | ECM power source (IGP2) | power_in | SL4-A-34 + SL4-B-1 | Aux 9–10 14V supply + ECU 14V supply | power_in | single_source | |
| OEM-C-4 | Clutch switch (MTCLS, M/T) | digital_in | — | — | — | single_source | |
| OEM-C-6 | Starter switch (STS) | digital_in | — | — | — | single_source | |
| OEM-C-7 | Vehicle speed sensor (VSS) | digital_in | SL4-A-20 | Digital input 1 | digital_in | single_source | |
| OEM-C-8 | Engine speed pulse (NEP) | tacho_out | — | — | — | single_source | |
| OEM-D-1 | Backup power (VBU) | power_in | — | — | — | single_source | |
| OEM-D-10 | Sensor 5V supply (VCC2) | vref | SL4-B-2 | Sensor supply Vref1 5.0V | vref | single_source | |
| OEM-D-11 | Sensor ground (SG2) | sensor_ground | SL4-B-10 + SL4-B-6 + SL4-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-D-12 | Throttle position sensor (TPS) | analog_in | SL4-B-14 | Analog input 4 | analog_in | single_source | |
| OEM-D-13 | Knock sensor front (KSF) | knock_in | SL4-B-16 | Knock 1 + | knock_in | single_source | |
| OEM-D-16 | Front secondary O2 signal (O2S FS) | lambda_nb_in | SL4-B-19 | Analog input 6 | analog_in | single_source | |
| OEM-D-17 | Rear secondary O2 signal (O2S RS) | lambda_nb_in | SL4-B-20 | Analog input 7 (switchable 1k pull-up) | analog_in | single_source | |
| OEM-D-18 | Front primary O2 signal (O2S FP) | lambda_nb_in | SL4-B-21 | Analog input 8 (switchable 1k pull-up) | analog_in | single_source | |
| OEM-D-19 | Rear primary O2 signal (O2S RP) | lambda_nb_in | SL4-B-22 | Analog input 9 (switchable 1k pull-up) | analog_in | single_source | |
| OEM-D-2 | Knock sensor rear (KSR) | knock_in | SL4-B-24 | Knock 2 + | knock_in | single_source | |
| OEM-D-20 | EGR valve lift sensor (EGRL) | analog_in | — | — | — | single_source | |
| OEM-D-4 | K-line diagnostics | serial | — | — | — | single_source | |
| OEM-D-7 | Engine coolant temperature (ECT) | temp_in | SL4-B-15 | Analog input 5 | analog_in | single_source | |
| OEM-D-8 | Intake air temperature (IAT) | temp_in | SL4-B-23 | Analog input 10 (switchable 1k pull-up) | analog_in | single_source | |
| OEM-D-9 | MAP sensor | analog_in | SL4-B-11 | Analog input 1 | analog_in | single_source | |
| OEM-F-1 | Sensor 5V supply (VCC1) | vref | SL4-B-2 | Sensor supply Vref1 5.0V | vref | single_source | |
| OEM-F-12 | Accelerator pedal position 2 (AP2) | analog_in | SL4-B-13 | Analog input 3 | analog_in | single_source | |
| OEM-F-13 | Accelerator pedal position 1 (AP1) | analog_in | SL4-B-12 | Analog input 2 | analog_in | single_source | |
| OEM-F-14 | Accelerator pedal 5V supply (VCC3) | vref | SL4-B-2 | Sensor supply Vref1 5.0V | vref | single_source | |
| OEM-F-15 | Accelerator pedal ground (SG3) | sensor_ground | SL4-B-10 + SL4-B-6 + SL4-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-F-16 | Brake switch 1 (BKSW1) | digital_in | SL4-A-21 | Digital input 2 | digital_in | single_source | |
| OEM-F-19 | VTEC solenoid front (VT SOLF) | low_side_out | SL4-A-14 | Auxiliary output 5 | switch_out | single_source | |
| OEM-F-2 | Sensor ground (SG1) | sensor_ground | SL4-B-10 + SL4-B-6 + SL4-B-8 | Analog sensor 0V reference + Crank index sensor − + Sync sensor − | sensor_ground + trigger_in | single_source | |
| OEM-F-20 | VTEC solenoid rear (VT SOLR) | low_side_out | SL4-A-15 | Auxiliary output 6 | switch_out | single_source | |
| OEM-F-4 | Fuel pump relay 2 (FLR2) | low_side_out | SL4-A-16 | Auxiliary output 7 | switch_out | single_source | |
| OEM-F-6 | Brake switch 2 (BKSW2) | digital_in | SL4-A-22 | Digital input 3 | digital_in | single_source | |
| OEM-G-10 | Throttle motor common power phases 2&4 (COM2) | power_in | SL4-A-34 + SL4-B-1 | Aux 9–10 14V supply + ECU 14V supply | power_in | single_source | |
| OEM-G-11 | Throttle motor phase 3 (PM3) | hbridge_out | — | — | — | single_source | |
| OEM-G-12 | Throttle motor phase 4 (PM4) | hbridge_out | — | — | — | single_source | |
| OEM-G-2 | Throttle motor power source 1 (IGM1) | power_in | SL4-A-34 + SL4-B-1 | Aux 9–10 14V supply + ECU 14V supply | power_in | single_source | |
| OEM-G-3 | Throttle motor power source 2 (IGM2) | power_in | SL4-A-34 + SL4-B-1 | Aux 9–10 14V supply + ECU 14V supply | power_in | single_source | |
| OEM-G-4 | Throttle motor phase 1 (PM1) | hbridge_out | — | — | — | single_source | |
| OEM-G-5 | Throttle motor phase 2 (PM2) | hbridge_out | — | — | — | single_source | |
| OEM-G-7 | Throttle motor ground 1 (PGM1) | ground | SL4-B-18 + SL4-B-26 | ECU ground + ECU ground | ground | single_source | |
| OEM-G-8 | Throttle motor ground 2 (PGM2) | ground | SL4-B-18 + SL4-B-26 | ECU ground + ECU ground | ground | single_source | |
| OEM-G-9 | Throttle motor common power phases 1&3 (COM1) | power_in | SL4-A-34 + SL4-B-1 | Aux 9–10 14V supply + ECU 14V supply | power_in | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-A-13 | SP-14V-1 | 0.85 | no route | ECM power source (IGP1) | — | |
| W2 | OEM-C-1 | SP-14V-1 | 0.85 | no route | ECM power source (IGP2) | — | |
| W3 | OEM-G-10 | SP-14V-1 | 0.85 | no route | Throttle motor common power phases 2&4 (COM2) | — | |
| W4 | OEM-G-2 | SP-14V-1 | 0.85 | no route | Throttle motor power source 1 (IGM1) | — | |
| W5 | OEM-G-3 | SP-14V-1 | 0.85 | no route | Throttle motor power source 2 (IGM2) | — | |
| W6 | OEM-G-9 | SP-14V-1 | 0.85 | no route | Throttle motor common power phases 1&3 (COM1) | — | |
| W7 | SP-14V-1 | SL4-A-34 | 0.85 | no route | Aux 9–10 14V supply | — | |
| W8 | SP-14V-1 | SL4-B-1 | 0.85 | no route | ECU 14V supply | — | |
| W9 | OEM-A-12 | SP-GND-1 | 0.85 | no route | Power ground (PG1) | — | |
| W10 | OEM-A-25 | SP-GND-1 | 0.85 | no route | Power ground (PG2) | — | |
| W11 | OEM-G-7 | SP-GND-1 | 0.85 | no route | Throttle motor ground 1 (PGM1) | — | |
| W12 | OEM-G-8 | SP-GND-1 | 0.85 | no route | Throttle motor ground 2 (PGM2) | — | |
| W13 | SP-GND-1 | SL4-B-18 | 0.85 | no route | ECU ground | — | |
| W14 | SP-GND-1 | SL4-B-26 | 0.85 | no route | ECU ground | — | |
| W15 | OEM-A-26 | SP-0V-1 | 0.5 | no route | Logic ground (LG1) | — | |
| W16 | OEM-B-13 | SP-0V-1 | 0.5 | no route | Cylinder position sensor 2 return (CYP 2M) | — | |
| W17 | OEM-B-14 | SP-0V-1 | 0.5 | no route | Cylinder position sensor 1 return (CYP 1M) | — | |
| W18 | OEM-B-15 | SP-0V-1 | 0.5 | no route | Crank position sensor 2 return (CKP 2M) | — | |
| W19 | OEM-B-16 | SP-0V-1 | 0.5 | no route | Crank position sensor 1 return (CKP 1M) | — | |
| W20 | OEM-B-9 | SP-0V-1 | 0.5 | no route | Logic ground (LG2) | — | |
| W21 | OEM-D-11 | SP-0V-1 | 0.5 | no route | Sensor ground (SG2) | — | |
| W22 | OEM-F-15 | SP-0V-1 | 0.5 | no route | Accelerator pedal ground (SG3) | — | |
| W23 | OEM-F-2 | SP-0V-1 | 0.5 | no route | Sensor ground (SG1) | — | |
| W24 | SP-0V-1 | SL4-B-10 | 0.5 | no route | Analog sensor 0V reference | — | |
| W25 | OEM-D-10 | SP-5V1-1 | 0.5 | no route | Sensor 5V supply (VCC2) | — | |
| W26 | OEM-F-1 | SP-5V1-1 | 0.5 | no route | Sensor 5V supply (VCC1) | — | |
| W27 | OEM-F-14 | SP-5V1-1 | 0.5 | no route | Accelerator pedal 5V supply (VCC3) | — | |
| W28 | SP-5V1-1 | SL4-B-2 | 0.5 | no route | Sensor supply Vref1 5.0V | — | |
| W29 | OEM-B-8 | SL4-B-5 | 0.5 | no route | Crank position sensor 1 + (CKP 1P) | — | |
| W30 | SP-0V-1 | SL4-B-6 | 0.5 | no route | Crank index sensor − | — | |
| W31 | OEM-B-6 | SL4-B-7 | 0.5 | no route | Cylinder position sensor 1 + (CYP 1P) | — | |
| W32 | SP-0V-1 | SL4-B-8 | 0.5 | no route | Sync sensor − | — | |
| W33 | OEM-D-13 | SL4-B-16 | 0.5 | no route | Knock sensor front (KSF) | — | |
| W34 | OEM-D-2 | SL4-B-24 | 0.5 | no route | Knock sensor rear (KSR) | — | |
| W35 | OEM-A-11 | SL4-A-26 | 0.5 | no route | Ignition coil 1 (IGN COIL1) | — | |
| W36 | OEM-A-24 | SL4-A-27 | 0.5 | no route | Ignition coil 2 (IGN COIL2) | — | |
| W37 | OEM-B-12 | SL4-A-28 | 0.5 | no route | Ignition coil 3 (IGN COIL3) | — | |
| W38 | OEM-B-11 | SL4-A-29 | 0.5 | no route | Ignition coil 4 (IGN COIL4) | — | |
| W39 | OEM-A-1 | SL4-A-1 | 0.5 | no route | Injector 1 (INJ1) | — | |
| W40 | OEM-A-2 | SL4-A-2 | 0.5 | no route | Injector 2 (INJ2) | — | |
| W41 | OEM-A-3 | SL4-A-3 | 0.5 | no route | Injector 3 (INJ3) | — | |
| W42 | OEM-A-14 | SL4-A-4 | 0.5 | no route | Injector 4 (INJ4) | — | |
| W43 | OEM-A-15 | SL4-A-1 | 0.5 | no route | Injector 5 (INJ5) | — | |
| W44 | OEM-A-16 | SL4-A-2 | 0.5 | no route | Injector 6 (INJ6) | — | |
| W45 | OEM-A-5 | SL4-B-3 | 0.5 | no route | Fuel pump relay (FLR1) | — | |
| W46 | OEM-F-19 | SL4-A-14 | 0.5 | no route | VTEC solenoid front (VT SOLF) | — | |
| W47 | OEM-F-20 | SL4-A-15 | 0.5 | no route | VTEC solenoid rear (VT SOLR) | — | |
| W48 | OEM-D-9 | SL4-B-11 | 0.5 | no route | MAP sensor | — | |
| W49 | OEM-F-13 | SL4-B-12 | 0.5 | no route | Accelerator pedal position 1 (AP1) | — | |
| W50 | OEM-F-12 | SL4-B-13 | 0.5 | no route | Accelerator pedal position 2 (AP2) | — | |
| W51 | OEM-D-12 | SL4-B-14 | 0.5 | no route | Throttle position sensor (TPS) | — | |
| W52 | OEM-D-7 | SL4-B-15 | 0.5 | no route | Engine coolant temperature (ECT) | — | |
| W53 | OEM-F-4 | SL4-A-16 | 0.5 | no route | Fuel pump relay 2 (FLR2) | — | |
| W54 | OEM-A-8 | SL4-A-17 | 0.5 | no route | A/C clutch relay (ACC) | — | |
| W55 | OEM-A-10 | SL4-A-10 | 0.5 | no route | Rear secondary O2 heater (RSO2SHTC) | — | |
| W56 | OEM-A-22 | SL4-A-11 | 0.5 | no route | Front primary O2 heater (FPO2SHTC) | — | |
| W57 | OEM-A-23 | SL4-A-12 | 0.5 | no route | Rear primary O2 heater (RPO2SHTC) | — | |
| W58 | OEM-A-9 | SL4-A-13 | 0.5 | no route | Front secondary O2 heater (FSO2SHTC) | — | |
| W59 | OEM-D-16 | SL4-B-19 | 0.5 | no route | Front secondary O2 signal (O2S FS) | — | |
| W60 | OEM-D-17 | SL4-B-20 | 0.5 | no route | Rear secondary O2 signal (O2S RS) | — | |
| W61 | OEM-D-18 | SL4-B-21 | 0.5 | no route | Front primary O2 signal (O2S FP) | — | |
| W62 | OEM-D-19 | SL4-B-22 | 0.5 | no route | Rear primary O2 signal (O2S RP) | — | |
| W63 | OEM-D-8 | SL4-B-23 | 0.5 | no route | Intake air temperature (IAT) | — | |
| W64 | OEM-C-7 | SL4-A-20 | 0.5 | no route | Vehicle speed sensor (VSS) | — | |
| W65 | OEM-F-16 | SL4-A-21 | 0.5 | no route | Brake switch 1 (BKSW1) | — | |
| W66 | OEM-F-6 | SL4-A-22 | 0.5 | no route | Brake switch 2 (BKSW2) | — | |
| W67 | OEM-B-1 | SL4-A-23 | 0.5 | no route | VTEC pressure switch front (VTP SWF) | — | |
| W68 | OEM-B-3 | SL4-A-24 | 0.5 | no route | VTEC pressure switch rear (VTP SWR) | — | |
| W69 | OEM-B-4 | SL4-A-25 | 0.5 | no route | Neutral switch (NT SW, M/T) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 4-1437290-0 | TE | Superseal 1.0 34-way plug, Key 1 | 1.000 | ea |
| connector | 4-1437290-1 | TE | Superseal 1.0 34-way plug, Key 2 | 1.000 | ea |
| terminal | 3-1447221-4 | TE | Superseal 1.0 socket terminal, 20 AWG (0.5 sq mm) | 45.000 | ea |
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (23)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | DBW_SENSOR_INPUT | tps | Only 0 throttle-position track(s) found. An electronic throttle needs two (main and sub) so the ECU can cross-check them. |
| error | NET_MERGED | OEM-A-1 + OEM-A-15 + SL4-A-1 | 2 different OEM functions share one net: OEM-A-1 Injector 1 (INJ1); OEM-A-15 Injector 5 (INJ5) |
| error | NET_MERGED | OEM-A-16 + OEM-A-2 + SL4-A-2 | 2 different OEM functions share one net: OEM-A-16 Injector 6 (INJ6); OEM-A-2 Injector 2 (INJ2) |
| error | REQUIRED_UNMAPPED | OEM-B-10 | Required OEM function "Ignition coil 5 (IGN COIL5)" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-B-2 | Required OEM function "Ignition coil 6 (IGN COIL6)" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-G-11 | Required OEM function "Throttle motor phase 3 (PM3)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-G-12 | Required OEM function "Throttle motor phase 4 (PM4)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-G-4 | Required OEM function "Throttle motor phase 1 (PM1)" (hbridge_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-G-5 | Required OEM function "Throttle motor phase 2 (PM2)" (hbridge_out) is not connected to the new ECU. |
| warn | DBW_SHARED_5V | OEM-D-10 + OEM-F-1 + OEM-F-14 + SL4-B-2 + SP-5V1-1 | These 5 V supplies are separate in the stock car (OEM-D-10 [tps], OEM-F-14 [pedal]) and here share one ECU 5 V (SL4-B-2). On a drive-by-wire car the OEM splits them so one short or fault can't corrupt both throttle/pedal tracks at once. SL4 has 1 5 V sensor supply pin(s). All are in use, so decide: accept the shared supply (and rely on the ECU's DBW fault checks), or add a separate regulated 5 V for the sub tracks. |
| warn | SUPPLY_GROUP | OEM-D-10 + OEM-F-1 + OEM-F-14 + SL4-B-2 + SP-5V1-1 | Supplies meant to stay independent share one net: OEM-D-10 [tps], OEM-F-14 [pedal]. The new ECU has no free 5 V reference, so they share one: normal on a standalone, but a short on any of these sensors drops them all. |
| info | NET_FAMILY | OEM-A-10 ↔ SL4-A-10 | OEM-A-10 "Rear secondary O2 heater (RSO2SHTC)" [low_side_out] is wired to SL4-A-10 "Auxiliary output 1" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-A-22 ↔ SL4-A-11 | OEM-A-22 "Front primary O2 heater (FPO2SHTC)" [low_side_out] is wired to SL4-A-11 "Auxiliary output 2" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-A-23 ↔ SL4-A-12 | OEM-A-23 "Rear primary O2 heater (RPO2SHTC)" [low_side_out] is wired to SL4-A-12 "Auxiliary output 3" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-A-8 ↔ SL4-A-17 | OEM-A-8 "A/C clutch relay (ACC)" [low_side_out] is wired to SL4-A-17 "Auxiliary output 8" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-A-9 ↔ SL4-A-13 | OEM-A-9 "Front secondary O2 heater (FSO2SHTC)" [low_side_out] is wired to SL4-A-13 "Auxiliary output 4" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-D-7 ↔ SL4-B-15 | OEM-D-7 "Engine coolant temperature (ECT)" [temp_in] is wired to SL4-B-15 "Analog input 5" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-D-8 ↔ SL4-B-23 | OEM-D-8 "Intake air temperature (IAT)" [temp_in] is wired to SL4-B-23 "Analog input 10 (switchable 1k pull-up)" [analog_in]. Thermistor on a plain analog input needs a pull-up; check the channel can enable one. |
| info | NET_FAMILY | OEM-F-19 ↔ SL4-A-14 | OEM-F-19 "VTEC solenoid front (VT SOLF)" [low_side_out] is wired to SL4-A-14 "Auxiliary output 5" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-F-2 ↔ SL4-B-6 | OEM-F-2 "Sensor ground (SG1)" [sensor_ground] is wired to SL4-B-6 "Crank index sensor −" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | NET_FAMILY | OEM-F-20 ↔ SL4-A-15 | OEM-F-20 "VTEC solenoid rear (VT SOLR)" [low_side_out] is wired to SL4-A-15 "Auxiliary output 6" [switch_out]. Configure this output as low side. |
| info | NET_FAMILY | OEM-F-4 ↔ SL4-A-16 | OEM-F-4 "Fuel pump relay 2 (FLR2)" [low_side_out] is wired to SL4-A-16 "Auxiliary output 7" [switch_out]. Configure this output as low side. |
| info | UNMAPPED | OEM | 13 optional OEM pins are not mapped: OEM-A-17 EVAP bypass solenoid (2WBS); OEM-A-20 IAB control solenoid (IABCS); OEM-A-21 EVAP purge control solenoid (PCS); OEM-A-4 EVAP canister vent shut valve (VSV); OEM-A-6 EGR control solenoid (ESOL); OEM-A-7 Malfunction indicator lamp (MIL); OEM-B-5 Cylinder position sensor 2 + (CYP 2P); OEM-B-7 Crank position sensor 2 + (CKP 2P); OEM-C-4 Clutch switch (MTCLS, M/T); OEM-C-6 Starter switch (STS); OEM-C-8 Engine speed pulse (NEP); OEM-D-20 EGR valve lift sensor (EGRL); OEM-D-4 K-line diagnostics |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-D-1 | Battery-constant (memory) feed of the stock ECU: the new ECU has no such input, so it is not needed. | mapping-proposal |
Notes
Fit check: unconfirmed. Confirm these before building: - Trigger pattern for Honda C32B not found in the ECU's docs (No C32B/NSX decoder.) - Only 4 ignition outputs for 6 cylinders: wasted spark (pair coils per firing order) - Only 4 injector outputs for 6 injectors: batch / semi-sequential injection - This car has Honda Type 1A (1997+) immobilizer; needs a delete/bypass 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-B 10: Ignition coil 5 (IGN COIL5): no free ignition output on Emtron SL4 - OEM-B 2: Ignition coil 6 (IGN COIL6): no free ignition output on Emtron SL4 - OEM-G 4: Throttle motor phase 1 (PM1): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-G 5: Throttle motor phase 2 (PM2): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-G 11: Throttle motor phase 3 (PM3): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand - OEM-G 12: Throttle motor phase 4 (PM4): no +/− pair in the pinout (multi-phase or half-documented motor); wire by hand Not wired: - OEM-D 1: Backup power (VBU): Emtron SL4 has no battery-constant input; not needed - OEM-B 7: Crank position sensor 2 + (CKP 2P): no free crank_vr/frequency_in input on Emtron SL4 - OEM-B 5: Cylinder position sensor 2 + (CYP 2P): no free cam_vr/cam_hall/frequency_in input on Emtron SL4 - SL4-B 17: Knock 1 − left open: the stock knock sensor has one ECU wire; check the ECU manual for single-wire knock sensors - SL4-B 25: Knock 2 − left open: the stock knock sensor has one ECU wire; check the ECU manual for single-wire knock sensors - OEM-A 17: EVAP bypass solenoid (2WBS): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL4 - OEM-A 20: IAB control solenoid (IABCS): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL4 - OEM-A 21: EVAP purge control solenoid (PCS): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL4 - OEM-A 4: EVAP canister vent shut valve (VSV): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL4 - OEM-A 6: EGR control solenoid (ESOL): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL4 - OEM-A 7: Malfunction indicator lamp (MIL): no free low_side/relay_control/heater_low_side/ls_hs/injector on Emtron SL4 - OEM-C 8: Engine speed pulse (NEP): no free tacho/frequency_out/low_side/ls_hs on Emtron SL4 - OEM-D 20: EGR valve lift sensor (EGRL): no free analog_0_5 on Emtron SL4 - OEM-C 4: Clutch switch (MTCLS, M/T): no free switch_in/frequency_in/analog_0_5 on Emtron SL4 - OEM-C 6: Starter switch (STS): no free switch_in/frequency_in/analog_0_5 on Emtron SL4 - OEM-D 4: K-line diagnostics: no free k_line on Emtron SL4 - SL4-B 4: Ignition switch input: not fed (the stock ECU has no ignition-sense pin); feed it from a switched-ignition source
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | 1997-2005 Acura NSX Service Manual §11 (PGM-FI), ECM terminal arrangement | https://www.manualslib.com/manual/1540331/Acura-Nsx-1997.html | — | — | — |
| 4 | vendor_doc | Emtron SL4/SL6/SL8 ECU datasheets | https://docs.emtronaustralia.com.au/engine-management/datasheets/index.html | archive | 2026-10-05 | 1e22846cec94 |
| 4 | vendor_doc | Emtron SL4/SL6/SL8 pinout pages | https://docs.emtronaustralia.com.au/engine-management/wiring/index.html | archive | 2026-10-05 | e52b3da9996a |