AP2 2004–05 (F22C1, cable) → Speeduino Speeduino v0.4 (auto)
AP2 2004–05 (F22C1, cable) — Speeduino — Speeduino
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-18
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 | none |
| Size of the job | 47 wires · 10 connectors · 4 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-B-1 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-B-9 | SP-14V-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | SP-14V-1 | SPEEDUINO-PWR-12V | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-B-10 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-B-2 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-B-20 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-B-22 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | SP-GND-1 | SPEEDUINO-A-10 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-GND-1 | SPEEDUINO-A-9 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-C-18 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-C-30 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-C-31 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-C-7 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | SP-0V-1 | SPEEDUINO-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | SP-0V-1 | SPEEDUINO-A-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-C-19 | SPEEDUINO-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-C-28 | SPEEDUINO-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-C-8 | SPEEDUINO-A-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-C-9 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-C-20 | SPEEDUINO-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-C-21 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-C-29 | SPEEDUINO-A-26 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-C-4 | SPEEDUINO-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-C-12 | SPEEDUINO-A-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-C-13 | SPEEDUINO-A-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-C-14 | SPEEDUINO-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-B-11 | SPEEDUINO-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-B-3 | SPEEDUINO-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-B-4 | SPEEDUINO-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-B-5 | SPEEDUINO-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-A-15 | SPEEDUINO-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-B-12 | RLY1-R-OUT | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | SP-14V-1 | RLY1-R-IN | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | SP-14V-1 | RLY1-R-COIL+ | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | RLY1-R-COIL- | SPEEDUINO-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-C-17 | SPEEDUINO-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-C-27 | SPEEDUINO-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-C-26 | SPEEDUINO-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-A-16 | SPEEDUINO-A-36 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-A-17 | SPEEDUINO-A-35 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-A-20 | SPEEDUINO-A-37 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-A-28 | SPEEDUINO-A-38 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-A-19 | SPEEDUINO-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-A-23 | SPEEDUINO-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-C-25 | SPEEDUINO-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-A-9 | SPEEDUINO-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-C-5 | SPEEDUINO-A-18 | 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 | RLY1-R-COIL+ | SPEEDUINO-A-10 | open (OL) | +12 V supply must not touch power ground | |
| 2 | RLY1-R-COIL+ | SPEEDUINO-A-12 | open (OL) | +12 V supply must not touch sensor ground | |
| 3 | RLY1-R-OUT | SPEEDUINO-A-12 | open (OL) | +12 V supply must not touch sensor ground | |
| 4 | RLY1-R-COIL+ | SPEEDUINO-A-13 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 5 | RLY1-R-COIL+ | SPEEDUINO-A-28 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 6 | RLY1-R-OUT | SPEEDUINO-A-13 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 7 | RLY1-R-OUT | SPEEDUINO-A-28 | open (OL) | +12 V supply must not touch 5 V sensor reference | |
| 8 | SPEEDUINO-A-10 | RLY1-R-OUT | open (OL) | power ground must not touch +12 V supply | |
| 9 | SPEEDUINO-A-10 | SPEEDUINO-A-13 | open (OL) | power ground must not touch 5 V sensor reference | |
| 10 | SPEEDUINO-A-10 | SPEEDUINO-A-28 | open (OL) | power ground must not touch 5 V sensor reference | |
| 11 | SPEEDUINO-A-12 | SPEEDUINO-A-13 | open (OL) | sensor ground must not touch 5 V sensor reference | |
| 12 | SPEEDUINO-A-12 | SPEEDUINO-A-28 | open (OL) | sensor ground must not touch 5 V sensor reference |
If any reading doesn't match, stop and get help before powering up.
Revisions
| Rev | Label | By | Date |
|---|---|---|---|
| No revisions yet. | |||
Schematic
Connectors
OEM-A
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Coolant temp gauge drive | — | — | — | — | — | — | — | — |
| 2 | Air control valve solenoid | — | — | — | — | — | — | — | — |
| 3 | Evap bypass solenoid | — | — | — | — | — | — | — | — |
| 4 | Evap canister vent shut valve | — | — | — | — | — | — | — | — |
| 5 | NC | — | — | — | — | — | — | — | — |
| 6 | Evap canister purge valve | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Vehicle speed sensor | — | W46 | — | 0.5 | SPEEDUINO-A-14 | — | — | — |
| 10 | Service check signal | — | — | — | — | — | — | — | — |
| 11 | NC | — | — | — | — | — | — | — | — |
| 12 | Immobilizer indicator light | — | — | — | — | — | — | — | — |
| 13 | Immobilizer enable signal | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | Fuel pump relay (USDM) | — | W31 | — | 0.5 | SPEEDUINO-A-16 | — | — | — |
| 16 | Fuel pump relay (JDM) | — | W39 | — | 0.5 | SPEEDUINO-A-36 | — | — | — |
| 17 | A/C clutch relay | — | W40 | — | 0.5 | SPEEDUINO-A-35 | — | — | — |
| 18 | Check engine light (MIL) | — | — | — | — | — | — | — | — |
| 19 | Tacho output | — | W43 | — | 0.5 | SPEEDUINO-A-17 | — | — | — |
| 20 | Radiator fan relay | — | W41 | — | 0.5 | SPEEDUINO-A-37 | — | — | — |
| 21 | K-Line | — | — | — | — | — | — | — | — |
| 22 | NC | — | — | — | — | — | — | — | — |
| 23 | Secondary O2 sensor | — | W44 | — | 0.5 | SPEEDUINO-A-21 | — | — | — |
| 24 | Starter switch signal | — | — | — | — | — | — | — | — |
| 25 | Immobilizer code | — | — | — | — | — | — | — | — |
| 26 | Power steering load detect | — | — | — | — | — | — | — | — |
| 27 | A/C switch (request) | — | — | — | — | — | — | — | — |
| 28 | Air pump relay | — | W42 | — | 0.5 | SPEEDUINO-A-38 | — | — | — |
| 29 | Fuel tank pressure sensor | — | — | — | — | — | — | — | — |
| 30 | Electrical load detector | — | — | — | — | — | — | — | — |
| 31 | NC | — | — | — | — | — | — | — | — |
| 32 | Brake switch | — | — | — | — | — | — | — | — |
OEM-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Power source 1 (main relay) | — | W1 | — | 0.85 | SP-14V-1 | — | — | — |
| 2 | Power ground 1 | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 3 | Injector 2 | — | W28 | — | 0.5 | SPEEDUINO-A-2 | — | — | — |
| 4 | Injector 3 | — | W29 | — | 0.5 | SPEEDUINO-A-3 | — | — | — |
| 5 | Injector 4 | — | W30 | — | 0.5 | SPEEDUINO-A-5 | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | Power source 2 (main relay) | — | W2 | — | 0.85 | SP-14V-1 | — | — | — |
| 10 | Power ground 2 | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | Injector 1 | — | W27 | — | 0.5 | SPEEDUINO-A-1 | — | — | — |
| 12 | VTEC solenoid | — | W32 | — | 0.5 | RLY1-R-OUT | — | — | — |
| 13 | NC | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | NC | — | — | — | — | — | — | — | — |
| 16 | NC | — | — | — | — | — | — | — | — |
| 17 | NC | — | — | — | — | — | — | — | — |
| 18 | NC | — | — | — | — | — | — | — | — |
| 19 | NC | — | — | — | — | — | — | — | — |
| 20 | Ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 21 | Backup power (battery constant) | — | — | — | — | — | — | — | — |
| 22 | Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
| 23 | Idle air control valve | — | — | — | — | — | — | — | — |
| 24 | NC | — | — | — | — | — | — | — | — |
| 25 | NC | — | — | — | — | — | — | — | — |
OEM-C
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Primary O2 heater | — | — | — | — | — | — | — | — |
| 2 | Alternator control | — | — | — | — | — | — | — | — |
| 3 | Knock sensor | — | — | — | — | — | — | — | — |
| 4 | Ignition coil 1 | — | W23 | — | 0.5 | SPEEDUINO-A-7 | — | — | — |
| 5 | Alternator FR signal | — | W47 | — | 0.5 | SPEEDUINO-A-18 | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | Sensor ground 1 | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 8 | Crank sensor + (CKP+) | — | W18 | — | 0.5 | SPEEDUINO-A-25 | — | — | — |
| 9 | Crank sensor − (CKP−) | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 10 | VTEC pressure switch | — | — | — | — | — | — | — | — |
| 11 | Secondary O2 heater control | — | — | — | — | — | — | — | — |
| 12 | Ignition coil 2 | — | W24 | — | 0.5 | SPEEDUINO-A-34 | — | — | — |
| 13 | Ignition coil 3 | — | W25 | — | 0.5 | SPEEDUINO-A-33 | — | — | — |
| 14 | Ignition coil 4 | — | W26 | — | 0.5 | SPEEDUINO-A-8 | — | — | — |
| 15 | Secondary O2 sensor | — | — | — | — | — | — | — | — |
| 16 | Primary O2 sensor | — | — | — | — | — | — | — | — |
| 17 | MAP sensor | — | W36 | — | 0.5 | SPEEDUINO-A-11 | — | — | — |
| 18 | Sensor ground 2 | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 19 | Sensor 5V supply 1 (MAP) | — | W16 | — | 0.5 | SPEEDUINO-A-13 | — | — | — |
| 20 | Cam (TDC1) sensor + | — | W20 | — | 0.5 | SPEEDUINO-A-24 | — | — | — |
| 21 | Cam (TDC1) sensor − | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 22 | Knock sensor | — | — | — | — | — | — | — | — |
| 23 | NC | — | — | — | — | — | — | — | — |
| 24 | Air pump electric current sensor | — | — | — | — | — | — | — | — |
| 25 | Intake air temp sensor | — | W45 | — | 0.5 | SPEEDUINO-A-20 | — | — | — |
| 26 | Coolant temp sensor | — | W38 | — | 0.5 | SPEEDUINO-A-19 | — | — | — |
| 27 | Throttle position sensor | — | W37 | — | 0.5 | SPEEDUINO-A-22 | — | — | — |
| 28 | Sensor 5V supply 2 | — | W17 | — | 0.5 | SPEEDUINO-A-28 | — | — | — |
| 29 | Cam (TDC2) sensor + | — | W22 | — | 0.5 | SPEEDUINO-A-26 | — | — | — |
| 30 | Cam (TDC2) sensor − | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 31 | Timing ground | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
OEM-D
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | NC | — | — | — | — | — | — | — | — |
| 2 | NC | — | — | — | — | — | — | — | — |
| 3 | NC | — | — | — | — | — | — | — | — |
| 4 | NC | — | — | — | — | — | — | — | — |
| 5 | NC | — | — | — | — | — | — | — | — |
| 6 | NC | — | — | — | — | — | — | — | — |
| 7 | NC | — | — | — | — | — | — | — | — |
| 8 | NC | — | — | — | — | — | — | — | — |
| 9 | NC | — | — | — | — | — | — | — | — |
| 10 | NC | — | — | — | — | — | — | — | — |
| 11 | NC | — | — | — | — | — | — | — | — |
| 12 | NC | — | — | — | — | — | — | — | — |
| 13 | NC | — | — | — | — | — | — | — | — |
| 14 | NC | — | — | — | — | — | — | — | — |
| 15 | NC | — | — | — | — | — | — | — | — |
| 16 | NC | — | — | — | — | — | — | — | — |
RLY1-R
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| COIL+ | Relay coil positive (switched +12 V) | — | W34 | — | 0.5 | SP-14V-1 | — | — | — |
| COIL- | Relay coil negative (ECU low-side driver) | — | W35 | — | 0.5 | SPEEDUINO-A-15 | — | — | — |
| IN | Relay contact input (switched +12 V) | — | W33 | — | 0.5 | SP-14V-1 | — | — | — |
| OUT | Relay contact output (switched +12 V to load) | — | W32 | — | 0.5 | OEM-B-12 | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W10 | — | 0.5 | OEM-C-18 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-C-30 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-C-31 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-C-7 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | SPEEDUINO-A-12 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | SPEEDUINO-A-23 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | OEM-C-9 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | OEM-C-21 | — | — | — |
SP-14V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W2 | — | 0.85 | OEM-B-9 | — | — | — |
| 1 | — | — | W1 | — | 0.85 | OEM-B-1 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | SPEEDUINO-PWR-12V | — | — | — |
| 1 | — | — | W33 | — | 0.5 | RLY1-R-IN | — | — | — |
| 1 | — | — | W34 | — | 0.5 | RLY1-R-COIL+ | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W4 | — | 0.85 | OEM-B-10 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-B-2 | — | — | — |
| 1 | — | — | W6 | — | 0.85 | OEM-B-20 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | OEM-B-22 | — | — | — |
| 1 | — | — | W8 | — | 0.85 | SPEEDUINO-A-10 | — | — | — |
| 1 | — | — | W9 | — | 0.85 | SPEEDUINO-A-9 | — | — | — |
SPEEDUINO-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 1 | — | W27 | — | 0.5 | OEM-B-11 | — | — | — |
| 10 | Ground | — | W8 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | MAP sensor (0-5V) | — | W36 | — | 0.5 | OEM-C-17 | — | — | — |
| 12 | Ground | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 13 | 5V | — | W16 | — | 0.5 | OEM-C-19 | — | — | — |
| 14 | Proto area 1 (flex fuel) | — | W46 | — | 0.5 | OEM-A-9 | — | — | — |
| 15 | Proto area 2 (fan) | — | W35 | — | 0.5 | RLY1-R-COIL- | — | — | — |
| 16 | Proto area 3 (fuel pump) | — | W31 | — | 0.5 | OEM-A-15 | — | — | — |
| 17 | Proto area 4 (tachometer) | — | W43 | — | 0.5 | OEM-A-19 | — | — | — |
| 18 | Proto area 5 (clutch) | — | W47 | — | 0.5 | OEM-C-5 | — | — | — |
| 19 | Coolant temp (CLT) | — | W38 | — | 0.5 | OEM-C-26 | — | — | — |
| 2 | Injector 2 | — | W28 | — | 0.5 | OEM-B-3 | — | — | — |
| 20 | Inlet air temp (IAT) | — | W45 | — | 0.5 | OEM-C-25 | — | — | — |
| 21 | O2 sensor | — | W44 | — | 0.5 | OEM-A-23 | — | — | — |
| 22 | TPS input | — | W37 | — | 0.5 | OEM-C-27 | — | — | — |
| 23 | Ground | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 24 | Cam input / VR2+ | — | W20 | — | 0.5 | OEM-C-20 | — | — | — |
| 25 | Crank input / VR1+ | — | W18 | — | 0.5 | OEM-C-8 | — | — | — |
| 26 | VR2- | — | W22 | — | 0.5 | OEM-C-29 | — | — | — |
| 27 | VR1- | — | — | — | — | — | — | — | — |
| 28 | 5V | — | W17 | — | 0.5 | OEM-C-28 | — | — | — |
| 29 | Idle stepper 2B | — | — | — | — | — | — | — | — |
| 3 | Injector 3 | — | W29 | — | 0.5 | OEM-B-4 | — | — | — |
| 30 | Idle stepper 2A | — | — | — | — | — | — | — | — |
| 31 | Idle stepper 1A | — | — | — | — | — | — | — | — |
| 32 | Idle stepper 1B | — | — | — | — | — | — | — | — |
| 33 | Ignition 3 | — | W25 | — | 0.5 | OEM-C-13 | — | — | — |
| 34 | Ignition 2 | — | W24 | — | 0.5 | OEM-C-12 | — | — | — |
| 35 | Boost | — | W40 | — | 0.5 | OEM-A-17 | — | — | — |
| 36 | Idle 2 (3-wire idle) | — | W39 | — | 0.5 | OEM-A-16 | — | — | — |
| 37 | PWM idle | — | W41 | — | 0.5 | OEM-A-20 | — | — | — |
| 38 | VVT | — | W42 | — | 0.5 | OEM-A-28 | — | — | — |
| 5 | Injector 4 | — | W30 | — | 0.5 | OEM-B-5 | — | — | — |
| 7 | Ignition 1 | — | W23 | — | 0.5 | OEM-C-4 | — | — | — |
| 8 | Ignition 4 | — | W26 | — | 0.5 | OEM-C-14 | — | — | — |
| 9 | Ground | — | W9 | — | 0.85 | SP-GND-1 | — | — | — |
SPEEDUINO-PWR
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 12V | Main power (+12 V switched) | — | W3 | — | 0.85 | SP-14V-1 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1 | Coolant temp gauge drive | low_side_out | — | — | — | corroborated | |
| OEM-A-10 | Service check signal | — | — | — | — | single_source | |
| OEM-A-11 | NC | — | — | — | — | unverified | |
| OEM-A-12 | Immobilizer indicator light | low_side_out | — | — | — | single_source | |
| OEM-A-13 | Immobilizer enable signal | — | — | — | — | single_source | |
| OEM-A-14 | NC | — | — | — | — | unverified | |
| OEM-A-15 | Fuel pump relay (USDM) | low_side_out | SPEEDUINO-A-16 | Proto area 3 (fuel pump) | low_side_out | corroborated | |
| OEM-A-16 | Fuel pump relay (JDM) | low_side_out | SPEEDUINO-A-36 | Idle 2 (3-wire idle) | low_side_out | single_source | |
| OEM-A-17 | A/C clutch relay | low_side_out | SPEEDUINO-A-35 | Boost | low_side_out | corroborated | |
| OEM-A-18 | Check engine light (MIL) | low_side_out | — | — | — | corroborated | |
| OEM-A-19 | Tacho output | tacho_out | SPEEDUINO-A-17 | Proto area 4 (tachometer) | tacho_out | corroborated | |
| OEM-A-2 | Air control valve solenoid | low_side_out | — | — | — | single_source | |
| OEM-A-20 | Radiator fan relay | low_side_out | SPEEDUINO-A-37 | PWM idle | low_side_out | corroborated | |
| OEM-A-21 | K-Line | serial | — | — | — | single_source | |
| OEM-A-22 | NC | — | — | — | — | unverified | |
| OEM-A-23 | Secondary O2 sensor | lambda_nb_in | SPEEDUINO-A-21 | O2 sensor | lambda_nb_in | single_source | |
| OEM-A-24 | Starter switch signal | digital_in | — | — | — | corroborated | |
| OEM-A-25 | Immobilizer code | — | — | — | — | single_source | |
| OEM-A-26 | Power steering load detect | digital_in | — | — | — | corroborated | |
| OEM-A-27 | A/C switch (request) | digital_in | — | — | — | corroborated | |
| OEM-A-28 | Air pump relay | low_side_out | SPEEDUINO-A-38 | VVT | low_side_out | corroborated | |
| OEM-A-29 | Fuel tank pressure sensor | analog_in | — | — | — | corroborated | |
| OEM-A-3 | Evap bypass solenoid | low_side_out | — | — | — | single_source | |
| OEM-A-30 | Electrical load detector | analog_in | — | — | — | corroborated | |
| OEM-A-31 | NC | — | — | — | — | unverified | |
| OEM-A-32 | Brake switch | digital_in | — | — | — | corroborated | |
| OEM-A-4 | Evap canister vent shut valve | low_side_out | — | — | — | single_source | |
| OEM-A-5 | NC | — | — | — | — | unverified | |
| OEM-A-6 | Evap canister purge valve | low_side_out | — | — | — | single_source | |
| OEM-A-7 | NC | — | — | — | — | unverified | |
| OEM-A-8 | NC | — | — | — | — | unverified | |
| OEM-A-9 | Vehicle speed sensor | digital_in | SPEEDUINO-A-14 | Proto area 1 (flex fuel) | digital_in | corroborated | |
| OEM-B-1 | Power source 1 (main relay) | power_in | RLY1-R-COIL+ + RLY1-R-IN + SPEEDUINO-PWR-12V | Relay coil positive (switched +12 V) + Relay contact input (switched +12 V) + Main power (+12 V switched) | power_in + power_out | corroborated | |
| OEM-B-10 | Power ground 2 | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-B-11 | Injector 1 | injector_out | SPEEDUINO-A-1 | Injector 1 | injector_out | corroborated | |
| OEM-B-12 | VTEC solenoid | high_side_out | RLY1-R-OUT | Relay contact output (switched +12 V to load) | power_out | corroborated | |
| OEM-B-13 | NC | — | — | — | — | unverified | |
| OEM-B-14 | NC | — | — | — | — | unverified | |
| OEM-B-15 | NC | — | — | — | — | unverified | |
| OEM-B-16 | NC | — | — | — | — | unverified | |
| OEM-B-17 | NC | — | — | — | — | unverified | |
| OEM-B-18 | NC | — | — | — | — | unverified | |
| OEM-B-19 | NC | — | — | — | — | unverified | |
| OEM-B-2 | Power ground 1 | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | corroborated | |
| OEM-B-20 | Ground | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-B-21 | Backup power (battery constant) | power_in | — | — | — | single_source | |
| OEM-B-22 | Ground | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-B-23 | Idle air control valve | low_side_out | — | — | — | corroborated | |
| OEM-B-24 | NC | — | — | — | — | unverified | |
| OEM-B-25 | NC | — | — | — | — | unverified | |
| OEM-B-3 | Injector 2 | injector_out | SPEEDUINO-A-2 | Injector 2 | injector_out | corroborated | |
| OEM-B-4 | Injector 3 | injector_out | SPEEDUINO-A-3 | Injector 3 | injector_out | corroborated | |
| OEM-B-5 | Injector 4 | injector_out | SPEEDUINO-A-5 | Injector 4 | injector_out | corroborated | |
| OEM-B-6 | NC | — | — | — | — | unverified | |
| OEM-B-7 | NC | — | — | — | — | unverified | |
| OEM-B-8 | NC | — | — | — | — | unverified | |
| OEM-B-9 | Power source 2 (main relay) | power_in | RLY1-R-COIL+ + RLY1-R-IN + SPEEDUINO-PWR-12V | Relay coil positive (switched +12 V) + Relay contact input (switched +12 V) + Main power (+12 V switched) | power_in + power_out | corroborated | |
| OEM-C-1 | Primary O2 heater | low_side_out | — | — | — | corroborated | |
| OEM-C-10 | VTEC pressure switch | digital_in | — | — | — | corroborated | |
| OEM-C-11 | Secondary O2 heater control | low_side_out | — | — | — | single_source | |
| OEM-C-12 | Ignition coil 2 | ignition_out | SPEEDUINO-A-34 | Ignition 2 | ignition_out | corroborated | |
| OEM-C-13 | Ignition coil 3 | ignition_out | SPEEDUINO-A-33 | Ignition 3 | ignition_out | corroborated | |
| OEM-C-14 | Ignition coil 4 | ignition_out | SPEEDUINO-A-8 | Ignition 4 | ignition_out | corroborated | |
| OEM-C-15 | Secondary O2 sensor | lambda_nb_in | — | — | — | corroborated | |
| OEM-C-16 | Primary O2 sensor | lambda_nb_in | — | — | — | corroborated | |
| OEM-C-17 | MAP sensor | analog_in | SPEEDUINO-A-11 | MAP sensor (0-5V) | analog_in | corroborated | |
| OEM-C-18 | Sensor ground 2 | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | corroborated | |
| OEM-C-19 | Sensor 5V supply 1 (MAP) | vref | SPEEDUINO-A-13 | 5V | vref | corroborated | |
| OEM-C-2 | Alternator control | low_side_out | — | — | — | single_source | |
| OEM-C-20 | Cam (TDC1) sensor + | trigger_in | SPEEDUINO-A-24 | Cam input / VR2+ | trigger_in | corroborated | |
| OEM-C-21 | Cam (TDC1) sensor − | trigger_in | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | corroborated | |
| OEM-C-22 | Knock sensor | knock_in | — | — | — | conflict | |
| OEM-C-23 | NC | — | — | — | — | unverified | |
| OEM-C-24 | Air pump electric current sensor | analog_in | — | — | — | single_source | |
| OEM-C-25 | Intake air temp sensor | temp_in | SPEEDUINO-A-20 | Inlet air temp (IAT) | temp_in | corroborated | |
| OEM-C-26 | Coolant temp sensor | temp_in | SPEEDUINO-A-19 | Coolant temp (CLT) | temp_in | corroborated | |
| OEM-C-27 | Throttle position sensor | analog_in | SPEEDUINO-A-22 | TPS input | analog_in | corroborated | |
| OEM-C-28 | Sensor 5V supply 2 | vref | SPEEDUINO-A-28 | 5V | vref | corroborated | |
| OEM-C-29 | Cam (TDC2) sensor + | trigger_in | SPEEDUINO-A-26 | VR2- | trigger_in | corroborated | |
| OEM-C-3 | Knock sensor | knock_in | — | — | — | conflict | |
| OEM-C-30 | Cam (TDC2) sensor − | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | corroborated | |
| OEM-C-31 | Timing ground | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-C-4 | Ignition coil 1 | ignition_out | SPEEDUINO-A-7 | Ignition 1 | ignition_out | corroborated | |
| OEM-C-5 | Alternator FR signal | digital_in | SPEEDUINO-A-18 | Proto area 5 (clutch) | digital_in | single_source | |
| OEM-C-6 | NC | — | — | — | — | unverified | |
| OEM-C-7 | Sensor ground 1 | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | corroborated | |
| OEM-C-8 | Crank sensor + (CKP+) | trigger_in | SPEEDUINO-A-25 | Crank input / VR1+ | trigger_in | corroborated | |
| OEM-C-9 | Crank sensor − (CKP−) | trigger_in | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | corroborated | |
| OEM-D-1 | NC | — | — | — | — | unverified | |
| OEM-D-10 | NC | — | — | — | — | unverified | |
| OEM-D-11 | NC | — | — | — | — | unverified | |
| OEM-D-12 | NC | — | — | — | — | unverified | |
| OEM-D-13 | NC | — | — | — | — | unverified | |
| OEM-D-14 | NC | — | — | — | — | unverified | |
| OEM-D-15 | NC | — | — | — | — | unverified | |
| OEM-D-16 | NC | — | — | — | — | unverified | |
| OEM-D-2 | NC | — | — | — | — | unverified | |
| OEM-D-3 | NC | — | — | — | — | unverified | |
| OEM-D-4 | NC | — | — | — | — | unverified | |
| OEM-D-5 | NC | — | — | — | — | unverified | |
| OEM-D-6 | NC | — | — | — | — | unverified | |
| OEM-D-7 | NC | — | — | — | — | unverified | |
| OEM-D-8 | NC | — | — | — | — | unverified | |
| OEM-D-9 | NC | — | — | — | — | unverified |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-B-1 | SP-14V-1 | 0.85 | no route | Power source 1 (main relay) | — | |
| W2 | OEM-B-9 | SP-14V-1 | 0.85 | no route | Power source 2 (main relay) | — | |
| W3 | SP-14V-1 | SPEEDUINO-PWR-12V | 0.85 | no route | Main power (+12 V switched) | — | |
| W4 | OEM-B-10 | SP-GND-1 | 0.85 | no route | Power ground 2 | — | |
| W5 | OEM-B-2 | SP-GND-1 | 0.85 | no route | Power ground 1 | — | |
| W6 | OEM-B-20 | SP-GND-1 | 0.85 | no route | Ground | — | |
| W7 | OEM-B-22 | SP-GND-1 | 0.85 | no route | Ground | — | |
| W8 | SP-GND-1 | SPEEDUINO-A-10 | 0.85 | no route | Ground | — | |
| W9 | SP-GND-1 | SPEEDUINO-A-9 | 0.85 | no route | Ground | — | |
| W10 | OEM-C-18 | SP-0V-1 | 0.5 | no route | Sensor ground 2 | — | |
| W11 | OEM-C-30 | SP-0V-1 | 0.5 | no route | Cam (TDC2) sensor − | — | |
| W12 | OEM-C-31 | SP-0V-1 | 0.5 | no route | Timing ground | — | |
| W13 | OEM-C-7 | SP-0V-1 | 0.5 | no route | Sensor ground 1 | — | |
| W14 | SP-0V-1 | SPEEDUINO-A-12 | 0.5 | no route | Ground | — | |
| W15 | SP-0V-1 | SPEEDUINO-A-23 | 0.5 | no route | Ground | — | |
| W16 | OEM-C-19 | SPEEDUINO-A-13 | 0.5 | no route | Sensor 5V supply 1 (MAP) | — | |
| W17 | OEM-C-28 | SPEEDUINO-A-28 | 0.5 | no route | Sensor 5V supply 2 | — | |
| W18 | OEM-C-8 | SPEEDUINO-A-25 | 0.5 | no route | Crank sensor + (CKP+) | — | |
| W19 | OEM-C-9 | SP-0V-1 | 0.5 | no route | Crank sensor − (CKP−) | — | |
| W20 | OEM-C-20 | SPEEDUINO-A-24 | 0.5 | no route | Cam (TDC1) sensor + | — | |
| W21 | OEM-C-21 | SP-0V-1 | 0.5 | no route | Cam (TDC1) sensor − | — | |
| W22 | OEM-C-29 | SPEEDUINO-A-26 | 0.5 | no route | Cam (TDC2) sensor + | — | |
| W23 | OEM-C-4 | SPEEDUINO-A-7 | 0.5 | no route | Ignition coil 1 | — | |
| W24 | OEM-C-12 | SPEEDUINO-A-34 | 0.5 | no route | Ignition coil 2 | — | |
| W25 | OEM-C-13 | SPEEDUINO-A-33 | 0.5 | no route | Ignition coil 3 | — | |
| W26 | OEM-C-14 | SPEEDUINO-A-8 | 0.5 | no route | Ignition coil 4 | — | |
| W27 | OEM-B-11 | SPEEDUINO-A-1 | 0.5 | no route | Injector 1 | — | |
| W28 | OEM-B-3 | SPEEDUINO-A-2 | 0.5 | no route | Injector 2 | — | |
| W29 | OEM-B-4 | SPEEDUINO-A-3 | 0.5 | no route | Injector 3 | — | |
| W30 | OEM-B-5 | SPEEDUINO-A-5 | 0.5 | no route | Injector 4 | — | |
| W31 | OEM-A-15 | SPEEDUINO-A-16 | 0.5 | no route | Fuel pump relay (USDM) | — | |
| W32 | OEM-B-12 | RLY1-R-OUT | 0.5 | no route | VTEC solenoid | — | |
| W33 | SP-14V-1 | RLY1-R-IN | 0.5 | no route | Relay contact input (switched +12 V) | — | |
| W34 | SP-14V-1 | RLY1-R-COIL+ | 0.5 | no route | Relay coil positive (switched +12 V) | — | |
| W35 | RLY1-R-COIL- | SPEEDUINO-A-15 | 0.5 | no route | Relay coil negative (ECU low-side driver) | — | |
| W36 | OEM-C-17 | SPEEDUINO-A-11 | 0.5 | no route | MAP sensor | — | |
| W37 | OEM-C-27 | SPEEDUINO-A-22 | 0.5 | no route | Throttle position sensor | — | |
| W38 | OEM-C-26 | SPEEDUINO-A-19 | 0.5 | no route | Coolant temp sensor | — | |
| W39 | OEM-A-16 | SPEEDUINO-A-36 | 0.5 | no route | Fuel pump relay (JDM) | — | |
| W40 | OEM-A-17 | SPEEDUINO-A-35 | 0.5 | no route | A/C clutch relay | — | |
| W41 | OEM-A-20 | SPEEDUINO-A-37 | 0.5 | no route | Radiator fan relay | — | |
| W42 | OEM-A-28 | SPEEDUINO-A-38 | 0.5 | no route | Air pump relay | — | |
| W43 | OEM-A-19 | SPEEDUINO-A-17 | 0.5 | no route | Tacho output | — | |
| W44 | OEM-A-23 | SPEEDUINO-A-21 | 0.5 | no route | Secondary O2 sensor | — | |
| W45 | OEM-C-25 | SPEEDUINO-A-20 | 0.5 | no route | Intake air temp sensor | — | |
| W46 | OEM-A-9 | SPEEDUINO-A-14 | 0.5 | no route | Vehicle speed sensor | — | |
| W47 | OEM-C-5 | SPEEDUINO-A-18 | 0.5 | no route | Alternator FR signal | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | 179679-6 | TE | S2000 2000–05 ECU harness plug B (25P, TE 040 Multi-Lock) | 1.000 | ea |
| connector | 179680-5 | TE | S2000 2000–05 ECU harness plug C (31P, TE 040 Multi-Lock) | 1.000 | ea |
| connector | 179681-6 | TE | S2000 2000–05 ECU harness plug A (32P, TE 040 Multi-Lock) | 1.000 | ea |
| connector | S2K-0005-ECU-D | Honda | S2000 2000–05 ECU plug D (P/N unknown) | 1.000 | ea |
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 |
|---|---|---|---|
| warn | LOAD_UNKNOWN | RLY1-R-OUT | RLY1-R-OUT "Relay contact output (switched +12 V to load)" drives OEM-B-12 VTEC solenoid (load 1.0 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-1 | SPEEDUINO-A-1 "Injector 1" drives OEM-B-11 Injector 1 (load 1.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-16 | SPEEDUINO-A-16 "Proto area 3 (fuel pump)" drives OEM-A-15 Fuel pump relay (USDM) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-2 | SPEEDUINO-A-2 "Injector 2" drives OEM-B-3 Injector 2 (load 1.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-3 | SPEEDUINO-A-3 "Injector 3" drives OEM-B-4 Injector 3 (load 1.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-35 | SPEEDUINO-A-35 "Boost" drives OEM-A-17 A/C clutch relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-36 | SPEEDUINO-A-36 "Idle 2 (3-wire idle)" drives OEM-A-16 Fuel pump relay (JDM) (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-37 | SPEEDUINO-A-37 "PWM idle" drives OEM-A-20 Radiator fan relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-38 | SPEEDUINO-A-38 "VVT" drives OEM-A-28 Air pump relay (load 0.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-5 | SPEEDUINO-A-5 "Injector 4" drives OEM-B-5 Injector 4 (load 1.2 A) but its current rating is unknown. Check the ECU manual. |
| info | NET_FAMILY | OEM-C-7 ↔ OEM-C-9 | OEM-C-7 "Sensor ground 1" [sensor_ground] is wired to OEM-C-9 "Crank sensor − (CKP−)" [trigger_in]. Trigger return tied to sensor/trigger ground: correct for single-ended trigger inputs. |
| info | UNMAPPED | OEM | 28 optional OEM pins are not mapped: OEM-A-1 Coolant temp gauge drive; OEM-A-10 Service check signal; OEM-A-12 Immobilizer indicator light; OEM-A-13 Immobilizer enable signal; OEM-A-18 Check engine light (MIL); OEM-A-2 Air control valve solenoid; OEM-A-21 K-Line; OEM-A-24 Starter switch signal; OEM-A-25 Immobilizer code; OEM-A-26 Power steering load detect; OEM-A-27 A/C switch (request); OEM-A-29 Fuel tank pressure sensor; OEM-A-3 Evap bypass solenoid; OEM-A-30 Electrical load detector; OEM-A-32 Brake switch; OEM-A-4 Evap canister vent shut valve; OEM-A-6 Evap canister purge valve; OEM-B-21 Backup power (battery constant); OEM-B-23 Idle air control valve; OEM-C-1 Primary O2 heater; OEM-C-10 VTEC pressure switch; OEM-C-11 Secondary O2 heater control; OEM-C-15 Secondary O2 sensor; OEM-C-16 Primary O2 sensor; OEM-C-2 Alternator control; OEM-C-22 Knock sensor; OEM-C-24 Air pump electric current sensor; OEM-C-3 Knock sensor |
Accepted (0)
| Code | Subject | Reason | By |
|---|
Notes
Fit check: unconfirmed. Confirm these before building: - Trigger pattern for Honda F22C1 not found in the ECU's docs (Confirmed absent from documented trigger/decoder list. The Honda J30/J32 decoder (In Development) covers 'early S2000' (AP1/F20C) only; the AP2 F22C1 is not covered by any decoder.) - No knock input; the stock knock sensor would be unused Auto-mapped by auto_map() from the library pin data on 2026-10-17. Review every wire against both manuals before building. Not wired: - OEM-B 21: Backup power (battery constant): Speeduino Speeduino has no battery-constant input; not needed - OEM-C 22: Knock sensor: no free knock input on Speeduino Speeduino - OEM-C 3: Knock sensor: no free knock input on Speeduino Speeduino - OEM-C 1: Primary O2 heater: no free heater_low_side/low_side/relay_control/ls_hs/injector on Speeduino Speeduino - OEM-C 11: Secondary O2 heater control: no free heater_low_side/low_side/relay_control/ls_hs/injector on Speeduino Speeduino - OEM-B 23: Idle air control valve: no free low_side/relay_control/heater_low_side/ls_hs/injector rated ≥ 1.0 A on Speeduino Speeduino - OEM-A 1: Coolant temp gauge drive: no free low_side/relay_control/heater_low_side/ls_hs/injector on Speeduino Speeduino - OEM-A 12: Immobilizer indicator light: no free low_side/relay_control/heater_low_side/ls_hs/injector on Speeduino Speeduino - OEM-A 18: Check engine light (MIL): no free low_side/relay_control/heater_low_side/ls_hs/injector on Speeduino Speeduino - OEM-A 2: Air control valve solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on Speeduino Speeduino - OEM-A 3: Evap bypass solenoid: no free low_side/relay_control/heater_low_side/ls_hs/injector on Speeduino Speeduino - OEM-A 4: Evap canister vent shut valve: no free low_side/relay_control/heater_low_side/ls_hs/injector on Speeduino Speeduino - OEM-A 6: Evap canister purge valve: no free low_side/relay_control/heater_low_side/ls_hs/injector on Speeduino Speeduino - OEM-C 2: Alternator control: no free low_side/relay_control/heater_low_side/ls_hs/injector on Speeduino Speeduino - OEM-C 15: Secondary O2 sensor: no free o2_narrowband/analog_0_5 on Speeduino Speeduino - OEM-C 16: Primary O2 sensor: no free o2_narrowband/analog_0_5 on Speeduino Speeduino - OEM-A 29: Fuel tank pressure sensor: no free analog_0_5 on Speeduino Speeduino - OEM-A 30: Electrical load detector: no free analog_0_5 on Speeduino Speeduino - OEM-C 24: Air pump electric current sensor: no free analog_0_5 on Speeduino Speeduino - OEM-A 24: Starter switch signal: no free switch_in/frequency_in/analog_0_5 on Speeduino Speeduino - OEM-A 26: Power steering load detect: no free switch_in/frequency_in/analog_0_5 on Speeduino Speeduino - OEM-A 27: A/C switch (request): no free switch_in/frequency_in/analog_0_5 on Speeduino Speeduino - OEM-A 32: Brake switch: no free switch_in/frequency_in/analog_0_5 on Speeduino Speeduino - OEM-C 10: VTEC pressure switch: no free switch_in/frequency_in/analog_0_5 on Speeduino Speeduino - OEM-A 21: K-Line: no free k_line on Speeduino Speeduino - OEM-A 10: Service check signal: not classified in the library; wire by hand - OEM-A 13: Immobilizer enable signal: not classified in the library; wire by hand - OEM-A 25: Immobilizer code: not classified in the library; wire by hand
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | AEM 30-6052 Series 2 Plug & Play EMS, 2000–2005 S2000 (original ECU pinout) | https://documents.aemelectronics.com/techlibrary_30-6052_series_2_plug___play_ems.pdf | — | 2026-10-05 | 9f79620fff5a |
| 4 | vendor_doc | Bosch relay catalogue (mini ISO relays) | https://www.bosch-ibusiness.com/media/downloads/kataloge/relay/2025_10_bosch_relay_catalogue.pdf | archive | 2026-10-05 | 20344cff1ef3 |
| 4 | vendor_doc | Haltech KB: F20C (AP1) engine | https://support.haltech.com/portal/en/kb/articles/f20c-ap1-engine | — | 2026-10-05 | e804da29d014 |
| 4 | community_copy | Honda S2000 Service Manual 2000–2008, Fuel and Emissions Systems | https://www.s2000.wiki/view/images/7/7f/Service_Manual_2000-2008.pdf | archive | 2026-10-05 | a470cfc928e9 |
| 4 | vendor_doc | Link S2000 AP1 PlugIn installation manual | https://linkecu.com/documentation/S2000X.pdf | — | 2026-10-05 | d12b0ff3f006 |
| 4 | vendor_doc | Omron G8V-RH-1C7T-R-DC12 high-current micro 280 automotive relay datasheet | https://www.alldatasheet.com/datasheet-pdf/pdf/333797/OMRON/G8V-RH-1C7T-R-DC12.html | — | 2026-10-05 | 764a0505a941 |
| 4 | vendor_doc | Speeduino Manual (08/04/25) — V0.4 board IDC40 pinout & features | https://speeduino.com/Speeduino_manual.pdf | archive | 2026-10-05 | 21806bd29ef0 |
| 4 | vendor_doc | Speeduino wiki — V0.4 board & wiring (12v input, switched power) | https://wiki.speeduino.com/en/boards/V04 | — | — | — |
| 2 | forum | AllPinouts: 2000–2005 Honda S2000 ECU | https://allpinouts.org/pinouts/connectors/car/2000-2005-honda-s2000-ecu/ | archive | 2026-10-05 | 81d874e0385d |
| 2 | forum | Autodata blog: ECU Pinout Honda S2000 2000-2004 | http://autodatas.blogspot.com/2012/11/ecu-pinout-honda-s2000-2000-2004.html | — | 2026-10-05 | 33b93af7640e |
| 2 | derived | Typical load estimates (relay coil ~0.2 A, high-Z injector ~1.2 A, VVT solenoid ~1 A) | — | — | — | — |