S2000 AP2 2006–09 cable conversion → Speeduino Speeduino
AP2 2006–09 converted to cable throttle — Speeduino — Speeduino
⚠ 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 | 3: read the Findings page before cutting any wire |
| Size of the job | 38 wires · 10 connectors · 5 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-A-4 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-A-5 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-A-8 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | OEM-A-9 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | OEM-E-3 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | SP-GND-1 | SPEEDUINO-A-10 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | SP-GND-1 | SPEEDUINO-A-9 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-A-24 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | SP-0V-1 | SPEEDUINO-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | SP-0V-1 | SPEEDUINO-A-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | SP-5V1-1 | SPEEDUINO-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-A-7 | SPEEDUINO-A-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-A-6 | SPEEDUINO-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-A-16 | SPEEDUINO-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-A-15 | SPEEDUINO-A-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-A-14 | SPEEDUINO-A-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-A-13 | SPEEDUINO-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-B-5 | SPEEDUINO-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-B-4 | SPEEDUINO-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | OEM-B-3 | SPEEDUINO-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | OEM-B-2 | SPEEDUINO-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-E-17 | SPEEDUINO-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-E-7 | SPEEDUINO-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-A-30 | SPEEDUINO-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-B-8 | SPEEDUINO-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-E-12 | SPEEDUINO-A-35 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-E-18 | SPEEDUINO-A-37 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-E-8 | SPEEDUINO-A-38 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-E-25 | SPEEDUINO-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-E-20 | SPEEDUINO-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | OEM-E-1 | SPEEDUINO-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-A-18 | SPEEDUINO-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-B-11 | SPEEDUINO-A-18 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-A-21 | SP-5V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | SP-5V-1 | SPEEDUINO-A-28 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | SP-5V-1 | TPS-J-VCC | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | TPS-J-SIG | SPEEDUINO-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | TPS-J-GND | SP-0V-1 | 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 | SPEEDUINO-A-28 | SPEEDUINO-A-12 | open (OL) | 5 V sensor reference must not touch sensor ground | |
| 2 | SPEEDUINO-A-10 | SPEEDUINO-A-13 | open (OL) | power ground must not touch 5 V sensor reference | |
| 3 | SPEEDUINO-A-10 | SPEEDUINO-A-28 | open (OL) | power ground must not touch 5 V sensor reference | |
| 4 | SPEEDUINO-A-12 | SPEEDUINO-A-13 | 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 | Knock sensor | — | — | — | — | — | — | — | — |
| 2 | Ignition power 2 | — | — | — | — | — | — | — | — |
| 3 | Ignition power 1 | — | — | — | — | — | — | — | — |
| 4 | Power ground 2 | — | W1 | — | 0.85 | SP-GND-1 | — | — | — |
| 5 | Power ground 1 | — | W2 | — | 0.85 | SP-GND-1 | — | — | — |
| 6 | Cam position sensor (T2) | — | W13 | — | 0.5 | SPEEDUINO-A-24 | — | — | — |
| 7 | Crank position sensor (T1) | — | W12 | — | 0.5 | SPEEDUINO-A-25 | — | — | — |
| 8 | Logic ground 2 | — | W3 | — | 0.85 | SP-GND-1 | — | — | — |
| 9 | Logic ground 1 | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| 10 | A/F sensor heater | — | — | — | — | — | — | — | — |
| 11 | Unused cavity | — | — | — | — | — | — | — | — |
| 12 | Unused cavity | — | — | — | — | — | — | — | — |
| 13 | Ignition coil 4 | — | W17 | — | 0.5 | SPEEDUINO-A-8 | — | — | — |
| 14 | Ignition coil 3 | — | W16 | — | 0.5 | SPEEDUINO-A-33 | — | — | — |
| 15 | Ignition coil 2 | — | W15 | — | 0.5 | SPEEDUINO-A-34 | — | — | — |
| 16 | Ignition coil 1 | — | W14 | — | 0.5 | SPEEDUINO-A-7 | — | — | — |
| 17 | Unused cavity | — | — | — | — | — | — | — | — |
| 18 | Vehicle speed sensor | — | W32 | — | 0.5 | SPEEDUINO-A-14 | — | — | — |
| 19 | Unused cavity | — | — | — | — | — | — | — | — |
| 20 | Sensor voltage 2 | — | — | — | — | — | — | — | — |
| 21 | Sensor voltage 1 | — | W34 | — | 0.5 | SP-5V-1 | — | — | — |
| 22 | Unused cavity | — | — | — | — | — | — | — | — |
| 23 | Sensor ground 2 | — | — | — | — | — | — | — | — |
| 24 | Sensor ground 1 | — | W8 | — | 0.5 | SP-0V-1 | — | — | — |
| 25 | Accelerator pedal position B | — | — | — | — | — | — | — | — |
| 26 | Accelerator pedal position A | — | — | — | — | — | — | — | — |
| 27 | Unused cavity | — | — | — | — | — | — | — | — |
| 28 | A/F sensor signal − | — | — | — | — | — | — | — | — |
| 29 | Unused cavity | — | — | — | — | — | — | — | — |
| 30 | MAP sensor | — | W24 | — | 0.5 | SPEEDUINO-A-11 | — | — | — |
| 31 | A/F sensor signal + | — | — | — | — | — | — | — | — |
OEM-B
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Unused cavity | — | — | — | — | — | — | — | — |
| 2 | Injector 4 | — | W21 | — | 0.5 | SPEEDUINO-A-5 | — | — | — |
| 3 | Injector 3 | — | W20 | — | 0.5 | SPEEDUINO-A-3 | — | — | — |
| 4 | Injector 2 | — | W19 | — | 0.5 | SPEEDUINO-A-2 | — | — | — |
| 5 | Injector 1 | — | W18 | — | 0.5 | SPEEDUINO-A-1 | — | — | — |
| 6 | VTEC solenoid | — | — | — | — | — | — | — | — |
| 7 | Unused cavity | — | — | — | — | — | — | — | — |
| 8 | Coolant temp sensor | — | W25 | — | 0.5 | SPEEDUINO-A-19 | — | — | — |
| 9 | Unused cavity | — | — | — | — | — | — | — | — |
| 10 | Alternator L signal | — | — | — | — | — | — | — | — |
| 11 | VTEC oil pressure switch | — | W33 | — | 0.5 | SPEEDUINO-A-18 | — | — | — |
| 12 | Unused cavity | — | — | — | — | — | — | — | — |
| 13 | Alternator FR signal | — | — | — | — | — | — | — | — |
| 14 | Unused cavity | — | — | — | — | — | — | — | — |
| 15 | Engine mount control solenoid | — | — | — | — | — | — | — | — |
| 16 | Unused cavity | — | — | — | — | — | — | — | — |
| 17 | Intake air temp sensor | — | — | — | — | — | — | — | — |
| 18 | Alternator control | — | — | — | — | — | — | — | — |
| 19 | Throttle actuator command to throttle control module (SEFD) | — | — | — | — | — | — | — | — |
| 20 | Throttle actuator command to throttle control module (SEDF) | — | — | — | — | — | — | — | — |
| 21 | Evap canister purge valve | — | — | — | — | — | — | — | — |
| 22 | Unused cavity | — | — | — | — | — | — | — | — |
| 23 | Unused cavity | — | — | — | — | — | — | — | — |
| 24 | Unused cavity | — | — | — | — | — | — | — | — |
OEM-D
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Cruise set switch | — | — | — | — | — | — | — | — |
| 2 | Unused cavity | — | — | — | — | — | — | — | — |
| 3 | Unused cavity | — | — | — | — | — | — | — | — |
| 4 | Cruise main switch | — | — | — | — | — | — | — | — |
| 5 | Unused cavity | — | — | — | — | — | — | — | — |
| 6 | Unused cavity | — | — | — | — | — | — | — | — |
| 7 | Cruise resume switch | — | — | — | — | — | — | — | — |
| 8 | Brake pedal position switch | — | — | — | — | — | — | — | — |
| 9 | Cruise clutch signal | — | — | — | — | — | — | — | — |
| 10 | Unused cavity | — | — | — | — | — | — | — | — |
| 11 | Unused cavity | — | — | — | — | — | — | — | — |
| 12 | Unused cavity | — | — | — | — | — | — | — | — |
| 13 | Unused cavity | — | — | — | — | — | — | — | — |
| 14 | Unused cavity | — | — | — | — | — | — | — | — |
| 15 | Throttle actuator relay | — | — | — | — | — | — | — | — |
| 16 | Unused cavity | — | — | — | — | — | — | — | — |
| 17 | Unused cavity | — | — | — | — | — | — | — | — |
OEM-E
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Coolant temp sensor 2 | — | W31 | — | 0.5 | SPEEDUINO-A-20 | — | — | — |
| 2 | Unused cavity | — | — | — | — | — | — | — | — |
| 3 | Logic ground 3 | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
| 4 | Sensor ground 3 | — | — | — | — | — | — | — | — |
| 5 | Sensor voltage 3 | — | — | — | — | — | — | — | — |
| 6 | Unused cavity | — | — | — | — | — | — | — | — |
| 7 | Main relay control | — | W23 | — | 0.5 | SPEEDUINO-A-15 | — | — | — |
| 8 | A/F sensor heater relay | — | W28 | — | 0.5 | SPEEDUINO-A-38 | — | — | — |
| 9 | Ignition signal | — | — | — | — | — | — | — | — |
| 10 | Unused cavity | — | — | — | — | — | — | — | — |
| 11 | CAN H | — | — | — | — | — | — | — | — |
| 12 | Radiator fan control | — | W26 | — | 0.5 | SPEEDUINO-A-35 | — | — | — |
| 13 | Multiplex communication | — | — | — | — | — | — | — | — |
| 14 | Fuel tank pressure sensor | — | — | — | — | — | — | — | — |
| 15 | Electrical load detector | — | — | — | — | — | — | — | — |
| 16 | Power steering load detector | — | — | — | — | — | — | — | — |
| 17 | Fuel pump relay | — | W22 | — | 0.5 | SPEEDUINO-A-16 | — | — | — |
| 18 | A/C clutch relay | — | W27 | — | 0.5 | SPEEDUINO-A-37 | — | — | — |
| 19 | Evap canister vent shut valve | — | — | — | — | — | — | — | — |
| 20 | Secondary O2 sensor | — | W30 | — | 0.5 | SPEEDUINO-A-21 | — | — | — |
| 21 | Secondary O2 heater | — | — | — | — | — | — | — | — |
| 22 | Brake pedal switch | — | — | — | — | — | — | — | — |
| 23 | Unused cavity | — | — | — | — | — | — | — | — |
| 24 | CAN L | — | — | — | — | — | — | — | — |
| 25 | Engine speed pulse (tacho) | — | W29 | — | 0.5 | SPEEDUINO-A-17 | — | — | — |
| 26 | Vehicle speed output | — | — | — | — | — | — | — | — |
| 27 | Immobilizer code | — | — | — | — | — | — | — | — |
| 28 | A/C switch signal | — | — | — | — | — | — | — | — |
| 29 | Service check signal | — | — | — | — | — | — | — | — |
| 30 | Write enable signal | — | — | — | — | — | — | — | — |
| 31 | Unused cavity | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W9 | — | 0.5 | SPEEDUINO-A-12 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | SPEEDUINO-A-23 | — | — | — |
| 1 | — | — | W38 | — | 0.5 | TPS-J-GND | — | — | — |
| 1 | — | — | W8 | — | 0.5 | OEM-A-24 | — | — | — |
SP-5V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W34 | — | 0.5 | OEM-A-21 | — | — | — |
| 1 | — | — | W35 | — | 0.5 | SPEEDUINO-A-28 | — | — | — |
| 1 | — | — | W36 | — | 0.5 | TPS-J-VCC | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W11 | — | 0.5 | SPEEDUINO-A-13 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W6 | — | 0.85 | SPEEDUINO-A-10 | — | — | — |
| 1 | — | — | W1 | — | 0.85 | OEM-A-4 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-A-5 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | OEM-A-8 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | OEM-A-9 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | OEM-E-3 | — | — | — |
| 1 | — | — | W7 | — | 0.85 | SPEEDUINO-A-9 | — | — | — |
SPEEDUINO-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 1 | — | W18 | — | 0.5 | OEM-B-5 | — | — | — |
| 10 | Ground | — | W6 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | MAP sensor (0-5V) | — | W24 | — | 0.5 | OEM-A-30 | — | — | — |
| 12 | Ground | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| 13 | 5V | — | W11 | — | 0.5 | SP-5V1-1 | — | — | — |
| 14 | Proto area 1 (flex fuel) | — | W32 | — | 0.5 | OEM-A-18 | — | — | — |
| 15 | Proto area 2 (fan) | — | W23 | — | 0.5 | OEM-E-7 | — | — | — |
| 16 | Proto area 3 (fuel pump) | — | W22 | — | 0.5 | OEM-E-17 | — | — | — |
| 17 | Proto area 4 (tachometer) | — | W29 | — | 0.5 | OEM-E-25 | — | — | — |
| 18 | Proto area 5 (clutch) | — | W33 | — | 0.5 | OEM-B-11 | — | — | — |
| 19 | Coolant temp (CLT) | — | W25 | — | 0.5 | OEM-B-8 | — | — | — |
| 2 | Injector 2 | — | W19 | — | 0.5 | OEM-B-4 | — | — | — |
| 20 | Inlet air temp (IAT) | — | W31 | — | 0.5 | OEM-E-1 | — | — | — |
| 21 | O2 sensor | — | W30 | — | 0.5 | OEM-E-20 | — | — | — |
| 22 | TPS input | — | W37 | — | 0.5 | TPS-J-SIG | — | — | — |
| 23 | Ground | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 24 | Cam input / VR2+ | — | W13 | — | 0.5 | OEM-A-6 | — | — | — |
| 25 | Crank input / VR1+ | — | W12 | — | 0.5 | OEM-A-7 | — | — | — |
| 26 | VR2- | — | — | — | — | — | — | — | — |
| 27 | VR1- | — | — | — | — | — | — | — | — |
| 28 | 5V | — | W35 | — | 0.5 | SP-5V-1 | — | — | — |
| 29 | Idle stepper 2B | — | — | — | — | — | — | — | — |
| 3 | Injector 3 | — | W20 | — | 0.5 | OEM-B-3 | — | — | — |
| 30 | Idle stepper 2A | — | — | — | — | — | — | — | — |
| 31 | Idle stepper 1A | — | — | — | — | — | — | — | — |
| 32 | Idle stepper 1B | — | — | — | — | — | — | — | — |
| 33 | Ignition 3 | — | W16 | — | 0.5 | OEM-A-14 | — | — | — |
| 34 | Ignition 2 | — | W15 | — | 0.5 | OEM-A-15 | — | — | — |
| 35 | Boost | — | W26 | — | 0.5 | OEM-E-12 | — | — | — |
| 36 | Idle 2 (3-wire idle) | — | — | — | — | — | — | — | — |
| 37 | PWM idle | — | W27 | — | 0.5 | OEM-E-18 | — | — | — |
| 38 | VVT | — | W28 | — | 0.5 | OEM-E-8 | — | — | — |
| 5 | Injector 4 | — | W21 | — | 0.5 | OEM-B-2 | — | — | — |
| 7 | Ignition 1 | — | W14 | — | 0.5 | OEM-A-16 | — | — | — |
| 8 | Ignition 4 | — | W17 | — | 0.5 | OEM-A-13 | — | — | — |
| 9 | Ground | — | W7 | — | 0.85 | SP-GND-1 | — | — | — |
TPS-J
Mating face
Wire side
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| VCC | 5V supply in | — | W36 | — | 0.5 | SP-5V-1 | — | — | — |
| SIG | Throttle position signal | — | W37 | — | 0.5 | SPEEDUINO-A-22 | — | — | — |
| GND | Sensor ground | — | W38 | — | 0.5 | SP-0V-1 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-A-1 | Knock sensor | knock_in | — | — | — | single_source | |
| OEM-A-10 | A/F sensor heater | low_side_out | — | — | — | single_source | |
| OEM-A-11 | Unused cavity | — | — | — | — | unverified | |
| OEM-A-12 | Unused cavity | — | — | — | — | unverified | |
| OEM-A-13 | Ignition coil 4 | ignition_out | SPEEDUINO-A-8 | Ignition 4 | ignition_out | single_source | |
| OEM-A-14 | Ignition coil 3 | ignition_out | SPEEDUINO-A-33 | Ignition 3 | ignition_out | single_source | |
| OEM-A-15 | Ignition coil 2 | ignition_out | SPEEDUINO-A-34 | Ignition 2 | ignition_out | single_source | |
| OEM-A-16 | Ignition coil 1 | ignition_out | SPEEDUINO-A-7 | Ignition 1 | ignition_out | single_source | |
| OEM-A-17 | Unused cavity | — | — | — | — | unverified | |
| OEM-A-18 | Vehicle speed sensor | digital_in | SPEEDUINO-A-14 | Proto area 1 (flex fuel) | digital_in | single_source | |
| OEM-A-19 | Unused cavity | — | — | — | — | unverified | |
| OEM-A-2 | Ignition power 2 | power_in | — | — | — | single_source | |
| OEM-A-20 | Sensor voltage 2 | vref | — | — | — | corroborated | |
| OEM-A-21 | Sensor voltage 1 | vref | SPEEDUINO-A-28 + TPS-J-VCC | 5V + 5V supply in | power_in + vref | single_source | |
| OEM-A-22 | Unused cavity | — | — | — | — | unverified | |
| OEM-A-23 | Sensor ground 2 | sensor_ground | — | — | — | corroborated | |
| OEM-A-24 | Sensor ground 1 | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 + TPS-J-GND | Ground + Ground + Sensor ground | sensor_ground | single_source | |
| OEM-A-25 | Accelerator pedal position B | analog_in | — | — | — | corroborated | |
| OEM-A-26 | Accelerator pedal position A | analog_in | — | — | — | corroborated | |
| OEM-A-27 | Unused cavity | — | — | — | — | unverified | |
| OEM-A-28 | A/F sensor signal − | — | — | — | — | single_source | |
| OEM-A-29 | Unused cavity | — | — | — | — | unverified | |
| OEM-A-3 | Ignition power 1 | power_in | — | — | — | single_source | |
| OEM-A-30 | MAP sensor | analog_in | SPEEDUINO-A-11 | MAP sensor (0-5V) | analog_in | single_source | |
| OEM-A-31 | A/F sensor signal + | — | — | — | — | single_source | |
| OEM-A-4 | Power ground 2 | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-A-5 | Power ground 1 | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-A-6 | Cam position sensor (T2) | trigger_in | SPEEDUINO-A-24 | Cam input / VR2+ | trigger_in | single_source | |
| OEM-A-7 | Crank position sensor (T1) | trigger_in | SPEEDUINO-A-25 | Crank input / VR1+ | trigger_in | single_source | |
| OEM-A-8 | Logic ground 2 | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-A-9 | Logic ground 1 | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-B-1 | Unused cavity | — | — | — | — | unverified | |
| OEM-B-10 | Alternator L signal | — | — | — | — | single_source | |
| OEM-B-11 | VTEC oil pressure switch | digital_in | SPEEDUINO-A-18 | Proto area 5 (clutch) | digital_in | single_source | |
| OEM-B-12 | Unused cavity | — | — | — | — | unverified | |
| OEM-B-13 | Alternator FR signal | analog_in | — | — | — | single_source | |
| OEM-B-14 | Unused cavity | — | — | — | — | unverified | |
| OEM-B-15 | Engine mount control solenoid | low_side_out | — | — | — | single_source | |
| OEM-B-16 | Unused cavity | — | — | — | — | unverified | |
| OEM-B-17 | Intake air temp sensor | temp_in | — | — | — | single_source | |
| OEM-B-18 | Alternator control | low_side_out | — | — | — | single_source | |
| OEM-B-19 | Throttle actuator command to throttle control module (SEFD) | — | — | — | — | conflict | |
| OEM-B-2 | Injector 4 | injector_out | SPEEDUINO-A-5 | Injector 4 | injector_out | single_source | |
| OEM-B-20 | Throttle actuator command to throttle control module (SEDF) | — | — | — | — | conflict | |
| OEM-B-21 | Evap canister purge valve | low_side_out | — | — | — | single_source | |
| OEM-B-22 | Unused cavity | — | — | — | — | unverified | |
| OEM-B-23 | Unused cavity | — | — | — | — | unverified | |
| OEM-B-24 | Unused cavity | — | — | — | — | unverified | |
| OEM-B-3 | Injector 3 | injector_out | SPEEDUINO-A-3 | Injector 3 | injector_out | single_source | |
| OEM-B-4 | Injector 2 | injector_out | SPEEDUINO-A-2 | Injector 2 | injector_out | single_source | |
| OEM-B-5 | Injector 1 | injector_out | SPEEDUINO-A-1 | Injector 1 | injector_out | single_source | |
| OEM-B-6 | VTEC solenoid | high_side_out | — | — | — | single_source | |
| OEM-B-7 | Unused cavity | — | — | — | — | unverified | |
| OEM-B-8 | Coolant temp sensor | temp_in | SPEEDUINO-A-19 | Coolant temp (CLT) | temp_in | single_source | |
| OEM-B-9 | Unused cavity | — | — | — | — | unverified | |
| OEM-D-1 | Cruise set switch | digital_in | — | — | — | single_source | |
| OEM-D-10 | Unused cavity | — | — | — | — | unverified | |
| OEM-D-11 | Unused cavity | — | — | — | — | unverified | |
| OEM-D-12 | Unused cavity | — | — | — | — | unverified | |
| OEM-D-13 | Unused cavity | — | — | — | — | unverified | |
| OEM-D-14 | Unused cavity | — | — | — | — | unverified | |
| OEM-D-15 | Throttle actuator relay | low_side_out | — | — | — | single_source | |
| OEM-D-16 | Unused cavity | — | — | — | — | unverified | |
| OEM-D-17 | Unused cavity | — | — | — | — | unverified | |
| OEM-D-2 | Unused cavity | — | — | — | — | unverified | |
| OEM-D-3 | Unused cavity | — | — | — | — | unverified | |
| OEM-D-4 | Cruise main switch | digital_in | — | — | — | single_source | |
| OEM-D-5 | Unused cavity | — | — | — | — | unverified | |
| OEM-D-6 | Unused cavity | — | — | — | — | unverified | |
| OEM-D-7 | Cruise resume switch | digital_in | — | — | — | single_source | |
| OEM-D-8 | Brake pedal position switch | digital_in | — | — | — | single_source | |
| OEM-D-9 | Cruise clutch signal | digital_in | — | — | — | single_source | |
| OEM-E-1 | Coolant temp sensor 2 | temp_in | SPEEDUINO-A-20 | Inlet air temp (IAT) | temp_in | single_source | |
| OEM-E-10 | Unused cavity | — | — | — | — | unverified | |
| OEM-E-11 | CAN H | can_h | — | — | — | single_source | |
| OEM-E-12 | Radiator fan control | low_side_out | SPEEDUINO-A-35 | Boost | low_side_out | single_source | |
| OEM-E-13 | Multiplex communication | serial | — | — | — | single_source | |
| OEM-E-14 | Fuel tank pressure sensor | analog_in | — | — | — | single_source | |
| OEM-E-15 | Electrical load detector | analog_in | — | — | — | single_source | |
| OEM-E-16 | Power steering load detector | analog_in | — | — | — | corroborated | |
| OEM-E-17 | Fuel pump relay | low_side_out | SPEEDUINO-A-16 | Proto area 3 (fuel pump) | low_side_out | single_source | |
| OEM-E-18 | A/C clutch relay | low_side_out | SPEEDUINO-A-37 | PWM idle | low_side_out | single_source | |
| OEM-E-19 | Evap canister vent shut valve | low_side_out | — | — | — | single_source | |
| OEM-E-2 | Unused cavity | — | — | — | — | unverified | |
| OEM-E-20 | Secondary O2 sensor | lambda_nb_in | SPEEDUINO-A-21 | O2 sensor | lambda_nb_in | single_source | |
| OEM-E-21 | Secondary O2 heater | low_side_out | — | — | — | single_source | |
| OEM-E-22 | Brake pedal switch | digital_in | — | — | — | single_source | |
| OEM-E-23 | Unused cavity | — | — | — | — | unverified | |
| OEM-E-24 | CAN L | can_l | — | — | — | single_source | |
| OEM-E-25 | Engine speed pulse (tacho) | tacho_out | SPEEDUINO-A-17 | Proto area 4 (tachometer) | tacho_out | single_source | |
| OEM-E-26 | Vehicle speed output | tacho_out | — | — | — | single_source | |
| OEM-E-27 | Immobilizer code | — | — | — | — | single_source | |
| OEM-E-28 | A/C switch signal | digital_in | — | — | — | single_source | |
| OEM-E-29 | Service check signal | — | — | — | — | single_source | |
| OEM-E-3 | Logic ground 3 | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-E-30 | Write enable signal | — | — | — | — | single_source | |
| OEM-E-31 | Unused cavity | — | — | — | — | unverified | |
| OEM-E-4 | Sensor ground 3 | sensor_ground | — | — | — | corroborated | |
| OEM-E-5 | Sensor voltage 3 | vref | — | — | — | corroborated | |
| OEM-E-6 | Unused cavity | — | — | — | — | unverified | |
| OEM-E-7 | Main relay control | low_side_out | SPEEDUINO-A-15 | Proto area 2 (fan) | low_side_out | single_source | |
| OEM-E-8 | A/F sensor heater relay | low_side_out | SPEEDUINO-A-38 | VVT | low_side_out | single_source | |
| OEM-E-9 | Ignition signal | digital_in | — | — | — | single_source |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-A-4 | SP-GND-1 | 0.85 | no route | Power ground 2 | — | |
| W2 | OEM-A-5 | SP-GND-1 | 0.85 | no route | Power ground 1 | — | |
| W3 | OEM-A-8 | SP-GND-1 | 0.85 | no route | Logic ground 2 | — | |
| W4 | OEM-A-9 | SP-GND-1 | 0.85 | no route | Logic ground 1 | — | |
| W5 | OEM-E-3 | SP-GND-1 | 0.85 | no route | Logic ground 3 | — | |
| W6 | SP-GND-1 | SPEEDUINO-A-10 | 0.85 | no route | Ground | — | |
| W7 | SP-GND-1 | SPEEDUINO-A-9 | 0.85 | no route | Ground | — | |
| W8 | OEM-A-24 | SP-0V-1 | 0.5 | no route | Sensor ground 1 | — | |
| W9 | SP-0V-1 | SPEEDUINO-A-12 | 0.5 | no route | Ground | — | |
| W10 | SP-0V-1 | SPEEDUINO-A-23 | 0.5 | no route | Ground | — | |
| W11 | SP-5V1-1 | SPEEDUINO-A-13 | 0.5 | no route | 5V | — | |
| W12 | OEM-A-7 | SPEEDUINO-A-25 | 0.5 | no route | Crank position sensor (T1) | — | |
| W13 | OEM-A-6 | SPEEDUINO-A-24 | 0.5 | no route | Cam position sensor (T2) | — | |
| W14 | OEM-A-16 | SPEEDUINO-A-7 | 0.5 | no route | Ignition coil 1 | — | |
| W15 | OEM-A-15 | SPEEDUINO-A-34 | 0.5 | no route | Ignition coil 2 | — | |
| W16 | OEM-A-14 | SPEEDUINO-A-33 | 0.5 | no route | Ignition coil 3 | — | |
| W17 | OEM-A-13 | SPEEDUINO-A-8 | 0.5 | no route | Ignition coil 4 | — | |
| W18 | OEM-B-5 | SPEEDUINO-A-1 | 0.5 | no route | Injector 1 | — | |
| W19 | OEM-B-4 | SPEEDUINO-A-2 | 0.5 | no route | Injector 2 | — | |
| W20 | OEM-B-3 | SPEEDUINO-A-3 | 0.5 | no route | Injector 3 | — | |
| W21 | OEM-B-2 | SPEEDUINO-A-5 | 0.5 | no route | Injector 4 | — | |
| W22 | OEM-E-17 | SPEEDUINO-A-16 | 0.5 | no route | Fuel pump relay | — | |
| W23 | OEM-E-7 | SPEEDUINO-A-15 | 0.5 | no route | Main relay control | — | |
| W24 | OEM-A-30 | SPEEDUINO-A-11 | 0.5 | no route | MAP sensor | — | |
| W25 | OEM-B-8 | SPEEDUINO-A-19 | 0.5 | no route | Coolant temp sensor | — | |
| W26 | OEM-E-12 | SPEEDUINO-A-35 | 0.5 | no route | Radiator fan control | — | |
| W27 | OEM-E-18 | SPEEDUINO-A-37 | 0.5 | no route | A/C clutch relay | — | |
| W28 | OEM-E-8 | SPEEDUINO-A-38 | 0.5 | no route | A/F sensor heater relay | — | |
| W29 | OEM-E-25 | SPEEDUINO-A-17 | 0.5 | no route | Engine speed pulse (tacho) | — | |
| W30 | OEM-E-20 | SPEEDUINO-A-21 | 0.5 | no route | Secondary O2 sensor | — | |
| W31 | OEM-E-1 | SPEEDUINO-A-20 | 0.5 | no route | Coolant temp sensor 2 | — | |
| W32 | OEM-A-18 | SPEEDUINO-A-14 | 0.5 | no route | Vehicle speed sensor | — | |
| W33 | OEM-B-11 | SPEEDUINO-A-18 | 0.5 | no route | VTEC oil pressure switch | — | |
| W34 | OEM-A-21 | SP-5V-1 | 0.5 | no route | Sensor voltage 1 | — | |
| W35 | SP-5V-1 | SPEEDUINO-A-28 | 0.5 | no route | 5V | — | |
| W36 | SP-5V-1 | TPS-J-VCC | 0.5 | no route | 5V supply in | — | |
| W37 | TPS-J-SIG | SPEEDUINO-A-22 | 0.5 | no route | Throttle position signal | — | |
| W38 | TPS-J-GND | SP-0V-1 | 0.5 | no route | Sensor ground | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|---|---|---|---|---|
| connector | S2K-0609-ECU-A | Honda | S2000 2006–09 ECU plug A (P/N unknown) | 1.000 | ea |
| connector | S2K-0609-ECU-B | Honda | S2000 2006–09 ECU plug B (P/N unknown) | 1.000 | ea |
| connector | S2K-0609-ECU-D | Honda | S2000 2006–09 ECU plug D (P/N unknown) | 1.000 | ea |
| connector | S2K-0609-ECU-E | Honda | S2000 2006–09 ECU plug E (P/N unknown) | 1.000 | ea |
| connector | TPS-3W | Generic | 3-way throttle position sensor plug (match to your throttle body) | 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 (16)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | REQUIRED_UNMAPPED | OEM-A-2 | Required OEM function "Ignition power 2" (power_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-A-3 | Required OEM function "Ignition power 1" (power_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-B-6 | Required OEM function "VTEC solenoid" (high_side_out) is not connected to the new ECU. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-1 | SPEEDUINO-A-1 "Injector 1" drives OEM-B-5 Injector 1 (load 1.2 A) but its current rating is unknown. Check the ECU manual. |
| warn | LOAD_UNKNOWN | SPEEDUINO-A-15 | SPEEDUINO-A-15 "Proto area 2 (fan)" drives OEM-E-7 Main relay control (load 0.2 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-E-17 Fuel pump relay (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-4 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-3 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-E-12 Radiator fan control (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-E-18 A/C clutch 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-E-8 A/F sensor heater 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-2 Injector 4 (load 1.2 A) but its current rating is unknown. Check the ECU manual. |
| info | PIN_UNSOURCED | TPS-J-GND | TPS-J-GND "Sensor ground" has no recorded source. |
| info | PIN_UNSOURCED | TPS-J-SIG | TPS-J-SIG "Throttle position signal" has no recorded source. |
| info | PIN_UNSOURCED | TPS-J-VCC | TPS-J-VCC "5V supply in" has no recorded source. |
| info | UNMAPPED | OEM | 33 optional OEM pins are not mapped: OEM-A-1 Knock sensor; OEM-A-10 A/F sensor heater; OEM-A-28 A/F sensor signal −; OEM-A-31 A/F sensor signal +; OEM-B-10 Alternator L signal; OEM-B-13 Alternator FR signal; OEM-B-15 Engine mount control solenoid; OEM-B-17 Intake air temp sensor; OEM-B-18 Alternator control; OEM-B-19 Throttle actuator command to throttle control module (SEFD); OEM-B-20 Throttle actuator command to throttle control module (SEDF); OEM-B-21 Evap canister purge valve; OEM-D-1 Cruise set switch; OEM-D-15 Throttle actuator relay; OEM-D-4 Cruise main switch; OEM-D-7 Cruise resume switch; OEM-D-8 Brake pedal position switch; OEM-D-9 Cruise clutch signal; OEM-E-11 CAN H; OEM-E-13 Multiplex communication; OEM-E-14 Fuel tank pressure sensor; OEM-E-15 Electrical load detector; OEM-E-16 Power steering load detector; OEM-E-19 Evap canister vent shut valve; OEM-E-21 Secondary O2 heater; OEM-E-22 Brake pedal switch; OEM-E-24 CAN L; OEM-E-26 Vehicle speed output; OEM-E-27 Immobilizer code; OEM-E-28 A/C switch signal; OEM-E-29 Service check signal; OEM-E-30 Write enable signal; OEM-E-9 Ignition signal |
Accepted (6)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-A-20 | DBW removed: accelerator pedal dropped (its signal, 5 V supply and sensor ground are no longer needed). | mapping-proposal |
| REQUIRED_UNMAPPED | OEM-A-23 | DBW removed: accelerator pedal dropped (its signal, 5 V supply and sensor ground are no longer needed). | mapping-proposal |
| REQUIRED_UNMAPPED | OEM-A-25 | DBW removed: accelerator pedal dropped (its signal, 5 V supply and sensor ground are no longer needed). | mapping-proposal |
| REQUIRED_UNMAPPED | OEM-A-26 | DBW removed: accelerator pedal dropped (its signal, 5 V supply and sensor ground are no longer needed). | mapping-proposal |
| REQUIRED_UNMAPPED | OEM-E-4 | DBW removed: accelerator pedal dropped (its signal, 5 V supply and sensor ground are no longer needed). | mapping-proposal |
| REQUIRED_UNMAPPED | OEM-E-5 | DBW removed: accelerator pedal dropped (its signal, 5 V supply and sensor ground are no longer needed). | mapping-proposal |
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
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | AEM 30-6053 Series 2 Plug & Play EMS, 2006–2008 S2000 AP2 (original ECU pinout) | https://documents.aemelectronics.com/techlibrary_30-6053_series_2_plug___play_ems.pdf | — | 2026-10-05 | ecc8006f849f |
| 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 | Speeduino Manual (08/04/25) — V0.4 board IDC40 pinout & features | https://speeduino.com/Speeduino_manual.pdf | archive | 2026-10-05 | 21806bd29ef0 |
| 3 | vendor_doc | ScienceofSpeed Link G4X ECU, S2000 2006–09 (product page) | https://www.scienceofspeed.com/s2000-2000-09/scienceofspeed-link-g4x-ecu-s2000-2006-09-enpp-3822.html | archive | 2026-10-05 | 643bc0efd6d7 |