Chevrolet Camaro SS 2010-15 (LS3/L99) → Speeduino Speeduino v0.4 (auto)
Chevrolet Camaro SS 2010-15 (LS3/L99) — Speeduino — Speeduino
⚠ NOT CHECKED. Don't build from this.
Drawn by Michael Gnankou · Rev 0 · draft · 2026-10-11
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 | 14: read the Findings page before cutting any wire |
| Size of the job | 63 wires · 6 connectors · 0 part lines |
| Tools | Crimp and extraction tools for each terminal family (see Connectors) · wire strippers · multimeter · heat gun + heat-shrink |
| Order of work | 1. Check every part against the parts list. 2. Cut and label every wire (labels: Export → Wire labels). 3. Crimp and pin connector by connector, ticking the build checklist. 4. Run the bench test with nothing plugged in and the battery disconnected. 5. Only then connect the ECU and power up. |
Build checklist
Tick each box as you go. Continuity: meter from end to end, expect under 1 Ω.
| Wire | From | To | Gauge | Colour | Cut | Label | Crimp A | Crimp B | Pin A | Pin B | Continuity |
|---|---|---|---|---|---|---|---|---|---|---|---|
| W1 | OEM-X1-73 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W2 | OEM-X2-78 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W3 | OEM-X2-79 | SP-GND-1 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W4 | SP-GND-1 | SPEEDUINO-A-10 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W5 | SP-GND-1 | SPEEDUINO-A-9 | 0.85 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W6 | OEM-X1-11 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W7 | OEM-X1-23 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W8 | OEM-X1-30 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W9 | OEM-X1-38 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W10 | OEM-X1-49 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W11 | OEM-X2-22 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W12 | OEM-X2-34 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W13 | OEM-X2-35 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W14 | OEM-X2-52 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W15 | OEM-X2-53 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W16 | OEM-X2-56 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W17 | OEM-X2-60 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W18 | OEM-X2-66 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W19 | OEM-X2-69 | SP-0V-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W20 | SP-0V-1 | SPEEDUINO-A-12 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W21 | SP-0V-1 | SPEEDUINO-A-23 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W22 | OEM-X1-33 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W23 | OEM-X1-34 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W24 | OEM-X1-36 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W25 | OEM-X1-56 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W26 | OEM-X2-2 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W27 | OEM-X2-3 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W28 | OEM-X2-41 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W29 | OEM-X2-43 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W30 | OEM-X2-44 | SP-5V1-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W31 | SP-5V1-1 | SPEEDUINO-A-13 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W32 | OEM-X2-68 | SPEEDUINO-A-25 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W33 | OEM-X2-64 | SPEEDUINO-A-24 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W34 | OEM-X2-70 | SPEEDUINO-A-7 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W35 | OEM-X2-73 | SPEEDUINO-A-34 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W36 | OEM-X2-77 | SPEEDUINO-A-33 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W37 | OEM-X2-76 | SPEEDUINO-A-8 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W38 | OEM-X2-20 | SPEEDUINO-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W39 | OEM-X2-37 | SPEEDUINO-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W40 | OEM-X2-38 | SPEEDUINO-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W41 | OEM-X2-39 | SPEEDUINO-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W42 | OEM-X2-18 | SPEEDUINO-A-1 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W43 | OEM-X2-19 | SPEEDUINO-A-2 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W44 | OEM-X2-40 | SPEEDUINO-A-3 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W45 | OEM-X2-17 | SPEEDUINO-A-5 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W46 | OEM-X2-6 | SPEEDUINO-A-31 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W47 | OEM-X2-5 | SPEEDUINO-A-32 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W48 | OEM-X1-50 | SPEEDUINO-A-16 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W49 | OEM-X1-59 | SPEEDUINO-A-15 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W50 | OEM-X1-17 | SPEEDUINO-A-36 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W51 | OEM-X1-51 | SPEEDUINO-A-35 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W52 | OEM-X1-52 | SPEEDUINO-A-37 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W53 | OEM-X1-58 | SPEEDUINO-A-38 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W54 | OEM-X1-63 | SPEEDUINO-A-29 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W55 | OEM-X1-64 | SPEEDUINO-A-30 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W56 | OEM-X1-48 | SPEEDUINO-A-17 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W57 | OEM-X2-58 | SPEEDUINO-A-11 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W58 | OEM-X1-29 | SPEEDUINO-A-22 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W59 | OEM-X1-10 | SPEEDUINO-A-21 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W60 | OEM-X2-21 | SPEEDUINO-A-19 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W61 | OEM-X1-37 | SPEEDUINO-A-20 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W62 | OEM-X1-71 | SPEEDUINO-A-14 | 0.5 | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | ☐ | |
| W63 | OEM-X1-72 | 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 | SPEEDUINO-A-13 | SPEEDUINO-A-10 | open (OL) | 5 V sensor reference must not touch power ground | |
| 2 | 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-X1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | HO2S signal, bank 1 sensor 2 (post-cat) | — | W59 | — | 0.5 | SPEEDUINO-A-21 | — | — | — |
| 11 | HO2S low reference, bank 1 sensor 2 | — | W6 | — | 0.5 | SP-0V-1 | — | — | — |
| 12 | A/C refrigerant pressure signal | — | — | — | — | — | — | — | — |
| 17 | High speed cooling fan relay | — | W50 | — | 0.5 | SPEEDUINO-A-36 | — | — | — |
| 19 | Ignition 1 voltage (key hot) | — | — | — | — | — | — | — | — |
| 20 | Battery positive voltage (batt hot) | — | — | — | — | — | — | — | — |
| 23 | APP sensor low reference | — | W7 | — | 0.5 | SP-0V-1 | — | — | — |
| 24 | Fuel tank pressure signal | — | — | — | — | — | — | — | — |
| 29 | Accelerator pedal position (APP) sensor 1 signal | — | W58 | — | 0.5 | SPEEDUINO-A-22 | — | — | — |
| 30 | APP sensor low reference | — | W8 | — | 0.5 | SP-0V-1 | — | — | — |
| 32 | Accelerator pedal position (APP) sensor 2 signal | — | — | — | — | — | — | — | — |
| 33 | 5V reference (fuel tank pressure) | — | W22 | — | 0.5 | SP-5V1-1 | — | — | — |
| 34 | 5V reference (A/C pressure) | — | W23 | — | 0.5 | SP-5V1-1 | — | — | — |
| 36 | 5V reference (APP sensor) | — | W24 | — | 0.5 | SP-5V1-1 | — | — | — |
| 37 | Intake air temperature (IAT) signal | — | W61 | — | 0.5 | SPEEDUINO-A-20 | — | — | — |
| 38 | Intake air temperature (IAT) low reference | — | W9 | — | 0.5 | SP-0V-1 | — | — | — |
| 41 | Mass air flow (MAF) signal | — | — | — | — | — | — | — | — |
| 47 | Ignition 1 voltage (key hot) | — | — | — | — | — | — | — | — |
| 48 | Tachometer output | — | W56 | — | 0.5 | SPEEDUINO-A-17 | — | — | — |
| 49 | HO2S low reference, bank 2 sensor 2 | — | W10 | — | 0.5 | SP-0V-1 | — | — | — |
| 50 | Fuel pump relay control (primary) | — | W48 | — | 0.5 | SPEEDUINO-A-16 | — | — | — |
| 51 | Fuel pump relay control (secondary) | — | W51 | — | 0.5 | SPEEDUINO-A-35 | — | — | — |
| 52 | Starter enable relay control | — | W52 | — | 0.5 | SPEEDUINO-A-37 | — | — | — |
| 56 | 5V reference (APP sensor) | — | W25 | — | 0.5 | SP-5V1-1 | — | — | — |
| 57 | VSS output to ABS (128k) | — | — | — | — | — | — | — | — |
| 58 | Low speed cooling fan relay | — | W53 | — | 0.5 | SPEEDUINO-A-38 | — | — | — |
| 59 | Powertrain relay coil control (main relay) | — | W49 | — | 0.5 | SPEEDUINO-A-15 | — | — | — |
| 61 | EVAP canister vent solenoid | — | — | — | — | — | — | — | — |
| 63 | A/C compressor clutch relay | — | W54 | — | 0.5 | SPEEDUINO-A-29 | — | — | — |
| 64 | HO2S heater low control, bank 2 sensor 2 | — | W55 | — | 0.5 | SPEEDUINO-A-30 | — | — | — |
| 65 | HO2S heater low control, bank 1 sensor 2 | — | — | — | — | — | — | — | — |
| 68 | Malfunction indicator lamp (MIL) | — | — | — | — | — | — | — | — |
| 69 | HO2S signal, bank 2 sensor 2 (post-cat) | — | — | — | — | — | — | — | — |
| 71 | VSS high signal (manual trans) | — | W62 | — | 0.5 | SPEEDUINO-A-14 | — | — | — |
| 72 | VSS low signal (manual trans) | — | W63 | — | 0.5 | SPEEDUINO-A-18 | — | — | — |
| 73 | Power ground | — | W1 | — | 0.85 | SP-GND-1 | — | — | — |
| 9 | Brake switch signal | — | — | — | — | — | — | — | — |
OEM-X2
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 10 | Cylinder shutoff solenoid 1 (AFM) | — | — | — | — | — | — | — | — |
| 11 | Cylinder shutoff solenoid 4 (AFM) | — | — | — | — | — | — | — | — |
| 12 | HO2S heater low control, bank 1 sensor 1 | — | — | — | — | — | — | — | — |
| 13 | HO2S heater low control, bank 2 sensor 1 | — | — | — | — | — | — | — | — |
| 14 | Cylinder shutoff solenoid 2 (AFM) | — | — | — | — | — | — | — | — |
| 16 | Camshaft actuator solenoid (VVT) | — | — | — | — | — | — | — | — |
| 17 | Injector 8 | — | W45 | — | 0.5 | SPEEDUINO-A-5 | — | — | — |
| 18 | Injector 5 | — | W42 | — | 0.5 | SPEEDUINO-A-1 | — | — | — |
| 19 | Injector 6 | — | W43 | — | 0.5 | SPEEDUINO-A-2 | — | — | — |
| 2 | 5V reference (crankshaft sensor) | — | W26 | — | 0.5 | SP-5V1-1 | — | — | — |
| 20 | Injector 1 | — | W38 | — | 0.5 | SPEEDUINO-A-1 | — | — | — |
| 21 | Engine coolant temperature (ECT) signal | — | W60 | — | 0.5 | SPEEDUINO-A-19 | — | — | — |
| 22 | ECT low reference | — | W11 | — | 0.5 | SP-0V-1 | — | — | — |
| 26 | Knock sensor 1 signal A | — | — | — | — | — | — | — | — |
| 27 | Knock sensor 1 signal B | — | — | — | — | — | — | — | — |
| 29 | Knock sensor 2 signal A | — | — | — | — | — | — | — | — |
| 3 | 5V reference (throttle body) | — | W27 | — | 0.5 | SP-5V1-1 | — | — | — |
| 30 | Knock sensor 2 signal B | — | — | — | — | — | — | — | — |
| 32 | Generator field duty control | — | — | — | — | — | — | — | — |
| 33 | Oil level switch signal | — | — | — | — | — | — | — | — |
| 34 | Oil pressure low reference | — | W12 | — | 0.5 | SP-0V-1 | — | — | — |
| 35 | Throttle body low reference | — | W13 | — | 0.5 | SP-0V-1 | — | — | — |
| 37 | Injector 2 | — | W39 | — | 0.5 | SPEEDUINO-A-2 | — | — | — |
| 38 | Injector 3 | — | W40 | — | 0.5 | SPEEDUINO-A-3 | — | — | — |
| 39 | Injector 4 | — | W41 | — | 0.5 | SPEEDUINO-A-5 | — | — | — |
| 40 | Injector 7 | — | W44 | — | 0.5 | SPEEDUINO-A-3 | — | — | — |
| 41 | 5V reference (oil pressure) | — | W28 | — | 0.5 | SP-5V1-1 | — | — | — |
| 43 | 5V reference (MAP) | — | W29 | — | 0.5 | SP-5V1-1 | — | — | — |
| 44 | 5V reference (camshaft sensor) | — | W30 | — | 0.5 | SP-5V1-1 | — | — | — |
| 5 | Throttle actuator motor control 2 | — | W47 | — | 0.5 | SPEEDUINO-A-32 | — | — | — |
| 50 | Engine oil pressure signal | — | — | — | — | — | — | — | — |
| 52 | Camshaft actuator low reference | — | W14 | — | 0.5 | SP-0V-1 | — | — | — |
| 53 | MAP low reference | — | W15 | — | 0.5 | SP-0V-1 | — | — | — |
| 56 | HO2S low reference, bank 1 sensor 1 | — | W16 | — | 0.5 | SP-0V-1 | — | — | — |
| 57 | HO2S signal, bank 1 sensor 1 (pre-cat) | — | — | — | — | — | — | — | — |
| 58 | Manifold absolute pressure (MAP) signal | — | W57 | — | 0.5 | SPEEDUINO-A-11 | — | — | — |
| 59 | HO2S signal, bank 2 sensor 1 (pre-cat) | — | — | — | — | — | — | — | — |
| 6 | Throttle actuator motor control 1 | — | W46 | — | 0.5 | SPEEDUINO-A-31 | — | — | — |
| 60 | HO2S low reference, bank 2 sensor 1 | — | W17 | — | 0.5 | SP-0V-1 | — | — | — |
| 61 | Charge indicator signal | — | — | — | — | — | — | — | — |
| 63 | Throttle position sensor 2 signal | — | — | — | — | — | — | — | — |
| 64 | Camshaft position signal (4x) | — | W33 | — | 0.5 | SPEEDUINO-A-24 | — | — | — |
| 65 | Throttle position sensor 1 signal | — | — | — | — | — | — | — | — |
| 66 | Camshaft position low reference | — | W18 | — | 0.5 | SP-0V-1 | — | — | — |
| 68 | Crankshaft position signal (58x) | — | W32 | — | 0.5 | SPEEDUINO-A-25 | — | — | — |
| 69 | Crankshaft position low reference | — | W19 | — | 0.5 | SP-0V-1 | — | — | — |
| 70 | Ignition coil 1 control | — | W34 | — | 0.5 | SPEEDUINO-A-7 | — | — | — |
| 71 | Ignition coil 8 control | — | — | — | — | — | — | — | — |
| 72 | Ignition coil 7 control | — | — | — | — | — | — | — | — |
| 73 | Ignition coil 2 control | — | W35 | — | 0.5 | SPEEDUINO-A-34 | — | — | — |
| 74 | Ignition coil 6 control | — | — | — | — | — | — | — | — |
| 75 | Ignition coil 5 control | — | — | — | — | — | — | — | — |
| 76 | Ignition coil 4 control | — | W37 | — | 0.5 | SPEEDUINO-A-8 | — | — | — |
| 77 | Ignition coil 3 control | — | W36 | — | 0.5 | SPEEDUINO-A-33 | — | — | — |
| 78 | Coil low reference (odd bank) | — | W2 | — | 0.85 | SP-GND-1 | — | — | — |
| 79 | Coil low reference (even bank) | — | W3 | — | 0.85 | SP-GND-1 | — | — | — |
| 8 | EVAP canister purge solenoid | — | — | — | — | — | — | — | — |
| 9 | Cylinder shutoff solenoid 3 (AFM) | — | — | — | — | — | — | — | — |
SP-0V
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W6 | — | 0.5 | OEM-X1-11 | — | — | — |
| 1 | — | — | W7 | — | 0.5 | OEM-X1-23 | — | — | — |
| 1 | — | — | W8 | — | 0.5 | OEM-X1-30 | — | — | — |
| 1 | — | — | W9 | — | 0.5 | OEM-X1-38 | — | — | — |
| 1 | — | — | W10 | — | 0.5 | OEM-X1-49 | — | — | — |
| 1 | — | — | W11 | — | 0.5 | OEM-X2-22 | — | — | — |
| 1 | — | — | W12 | — | 0.5 | OEM-X2-34 | — | — | — |
| 1 | — | — | W13 | — | 0.5 | OEM-X2-35 | — | — | — |
| 1 | — | — | W14 | — | 0.5 | OEM-X2-52 | — | — | — |
| 1 | — | — | W15 | — | 0.5 | OEM-X2-53 | — | — | — |
| 1 | — | — | W16 | — | 0.5 | OEM-X2-56 | — | — | — |
| 1 | — | — | W17 | — | 0.5 | OEM-X2-60 | — | — | — |
| 1 | — | — | W18 | — | 0.5 | OEM-X2-66 | — | — | — |
| 1 | — | — | W19 | — | 0.5 | OEM-X2-69 | — | — | — |
| 1 | — | — | W20 | — | 0.5 | SPEEDUINO-A-12 | — | — | — |
| 1 | — | — | W21 | — | 0.5 | SPEEDUINO-A-23 | — | — | — |
SP-5V1
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W22 | — | 0.5 | OEM-X1-33 | — | — | — |
| 1 | — | — | W23 | — | 0.5 | OEM-X1-34 | — | — | — |
| 1 | — | — | W24 | — | 0.5 | OEM-X1-36 | — | — | — |
| 1 | — | — | W25 | — | 0.5 | OEM-X1-56 | — | — | — |
| 1 | — | — | W26 | — | 0.5 | OEM-X2-2 | — | — | — |
| 1 | — | — | W27 | — | 0.5 | OEM-X2-3 | — | — | — |
| 1 | — | — | W28 | — | 0.5 | OEM-X2-41 | — | — | — |
| 1 | — | — | W29 | — | 0.5 | OEM-X2-43 | — | — | — |
| 1 | — | — | W30 | — | 0.5 | OEM-X2-44 | — | — | — |
| 1 | — | — | W31 | — | 0.5 | SPEEDUINO-A-13 | — | — | — |
SP-GND
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | — | — | W1 | — | 0.85 | OEM-X1-73 | — | — | — |
| 1 | — | — | W2 | — | 0.85 | OEM-X2-78 | — | — | — |
| 1 | — | — | W3 | — | 0.85 | OEM-X2-79 | — | — | — |
| 1 | — | — | W4 | — | 0.85 | SPEEDUINO-A-10 | — | — | — |
| 1 | — | — | W5 | — | 0.85 | SPEEDUINO-A-9 | — | — | — |
SPEEDUINO-A
| Cavity | Function | Signal | Wire | Colour | Gauge (mm²) | Destination | Terminal | Seal | Plug |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Injector 1 | — | W38 | — | 0.5 | OEM-X2-20 | — | — | — |
| 1 | Injector 1 | — | W42 | — | 0.5 | OEM-X2-18 | — | — | — |
| 10 | Ground | — | W4 | — | 0.85 | SP-GND-1 | — | — | — |
| 11 | MAP sensor (0-5V) | — | W57 | — | 0.5 | OEM-X2-58 | — | — | — |
| 12 | Ground | — | W20 | — | 0.5 | SP-0V-1 | — | — | — |
| 13 | 5V | — | W31 | — | 0.5 | SP-5V1-1 | — | — | — |
| 14 | Proto area 1 (flex fuel) | — | W62 | — | 0.5 | OEM-X1-71 | — | — | — |
| 15 | Proto area 2 (fan) | — | W49 | — | 0.5 | OEM-X1-59 | — | — | — |
| 16 | Proto area 3 (fuel pump) | — | W48 | — | 0.5 | OEM-X1-50 | — | — | — |
| 17 | Proto area 4 (tachometer) | — | W56 | — | 0.5 | OEM-X1-48 | — | — | — |
| 18 | Proto area 5 (clutch) | — | W63 | — | 0.5 | OEM-X1-72 | — | — | — |
| 19 | Coolant temp (CLT) | — | W60 | — | 0.5 | OEM-X2-21 | — | — | — |
| 2 | Injector 2 | — | W39 | — | 0.5 | OEM-X2-37 | — | — | — |
| 2 | Injector 2 | — | W43 | — | 0.5 | OEM-X2-19 | — | — | — |
| 20 | Inlet air temp (IAT) | — | W61 | — | 0.5 | OEM-X1-37 | — | — | — |
| 21 | O2 sensor | — | W59 | — | 0.5 | OEM-X1-10 | — | — | — |
| 22 | TPS input | — | W58 | — | 0.5 | OEM-X1-29 | — | — | — |
| 23 | Ground | — | W21 | — | 0.5 | SP-0V-1 | — | — | — |
| 24 | Cam input / VR2+ | — | W33 | — | 0.5 | OEM-X2-64 | — | — | — |
| 25 | Crank input / VR1+ | — | W32 | — | 0.5 | OEM-X2-68 | — | — | — |
| 26 | VR2- | — | — | — | — | — | — | — | — |
| 27 | VR1- | — | — | — | — | — | — | — | — |
| 28 | 5V | — | — | — | — | — | — | — | — |
| 29 | Idle stepper 2B | — | W54 | — | 0.5 | OEM-X1-63 | — | — | — |
| 3 | Injector 3 | — | W40 | — | 0.5 | OEM-X2-38 | — | — | — |
| 3 | Injector 3 | — | W44 | — | 0.5 | OEM-X2-40 | — | — | — |
| 30 | Idle stepper 2A | — | W55 | — | 0.5 | OEM-X1-64 | — | — | — |
| 31 | Idle stepper 1A | — | W46 | — | 0.5 | OEM-X2-6 | — | — | — |
| 32 | Idle stepper 1B | — | W47 | — | 0.5 | OEM-X2-5 | — | — | — |
| 33 | Ignition 3 | — | W36 | — | 0.5 | OEM-X2-77 | — | — | — |
| 34 | Ignition 2 | — | W35 | — | 0.5 | OEM-X2-73 | — | — | — |
| 35 | Boost | — | W51 | — | 0.5 | OEM-X1-51 | — | — | — |
| 36 | Idle 2 (3-wire idle) | — | W50 | — | 0.5 | OEM-X1-17 | — | — | — |
| 37 | PWM idle | — | W52 | — | 0.5 | OEM-X1-52 | — | — | — |
| 38 | VVT | — | W53 | — | 0.5 | OEM-X1-58 | — | — | — |
| 5 | Injector 4 | — | W41 | — | 0.5 | OEM-X2-39 | — | — | — |
| 5 | Injector 4 | — | W45 | — | 0.5 | OEM-X2-17 | — | — | — |
| 7 | Ignition 1 | — | W34 | — | 0.5 | OEM-X2-70 | — | — | — |
| 8 | Ignition 4 | — | W37 | — | 0.5 | OEM-X2-76 | — | — | — |
| 9 | Ground | — | W5 | — | 0.85 | SP-GND-1 | — | — | — |
Pin map
| OEM point | OEM function | OEM family | Target point | Target function | Target family | Wire colour | Evidence |
|---|---|---|---|---|---|---|---|
| OEM-X1-10 | HO2S signal, bank 1 sensor 2 (post-cat) | lambda_nb_in | SPEEDUINO-A-21 | O2 sensor | lambda_nb_in | single_source | |
| OEM-X1-11 | HO2S low reference, bank 1 sensor 2 | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X1-12 | A/C refrigerant pressure signal | analog_in | — | — | — | corroborated | |
| OEM-X1-17 | High speed cooling fan relay | low_side_out | SPEEDUINO-A-36 | Idle 2 (3-wire idle) | low_side_out | corroborated | |
| OEM-X1-19 | Ignition 1 voltage (key hot) | power_in | — | — | — | single_source | |
| OEM-X1-20 | Battery positive voltage (batt hot) | power_in | — | — | — | single_source | |
| OEM-X1-23 | APP sensor low reference | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X1-24 | Fuel tank pressure signal | analog_in | — | — | — | corroborated | |
| OEM-X1-29 | Accelerator pedal position (APP) sensor 1 signal | analog_in | SPEEDUINO-A-22 | TPS input | analog_in | single_source | |
| OEM-X1-30 | APP sensor low reference | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X1-32 | Accelerator pedal position (APP) sensor 2 signal | analog_in | — | — | — | single_source | |
| OEM-X1-33 | 5V reference (fuel tank pressure) | vref | SPEEDUINO-A-13 | 5V | vref | single_source | |
| OEM-X1-34 | 5V reference (A/C pressure) | vref | SPEEDUINO-A-13 | 5V | vref | single_source | |
| OEM-X1-36 | 5V reference (APP sensor) | vref | SPEEDUINO-A-13 | 5V | vref | single_source | |
| OEM-X1-37 | Intake air temperature (IAT) signal | temp_in | SPEEDUINO-A-20 | Inlet air temp (IAT) | temp_in | corroborated | |
| OEM-X1-38 | Intake air temperature (IAT) low reference | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X1-41 | Mass air flow (MAF) signal | analog_in | — | — | — | corroborated | |
| OEM-X1-47 | Ignition 1 voltage (key hot) | power_in | — | — | — | single_source | |
| OEM-X1-48 | Tachometer output | tacho_out | SPEEDUINO-A-17 | Proto area 4 (tachometer) | tacho_out | corroborated | |
| OEM-X1-49 | HO2S low reference, bank 2 sensor 2 | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X1-50 | Fuel pump relay control (primary) | low_side_out | SPEEDUINO-A-16 | Proto area 3 (fuel pump) | low_side_out | corroborated | |
| OEM-X1-51 | Fuel pump relay control (secondary) | low_side_out | SPEEDUINO-A-35 | Boost | low_side_out | corroborated | |
| OEM-X1-52 | Starter enable relay control | low_side_out | SPEEDUINO-A-37 | PWM idle | low_side_out | corroborated | |
| OEM-X1-56 | 5V reference (APP sensor) | vref | SPEEDUINO-A-13 | 5V | vref | single_source | |
| OEM-X1-57 | VSS output to ABS (128k) | tacho_out | — | — | — | corroborated | |
| OEM-X1-58 | Low speed cooling fan relay | low_side_out | SPEEDUINO-A-38 | VVT | low_side_out | corroborated | |
| OEM-X1-59 | Powertrain relay coil control (main relay) | low_side_out | SPEEDUINO-A-15 | Proto area 2 (fan) | low_side_out | corroborated | |
| OEM-X1-61 | EVAP canister vent solenoid | low_side_out | — | — | — | corroborated | |
| OEM-X1-63 | A/C compressor clutch relay | low_side_out | SPEEDUINO-A-29 | Idle stepper 2B | hbridge_out | corroborated | |
| OEM-X1-64 | HO2S heater low control, bank 2 sensor 2 | low_side_out | SPEEDUINO-A-30 | Idle stepper 2A | hbridge_out | single_source | |
| OEM-X1-65 | HO2S heater low control, bank 1 sensor 2 | low_side_out | — | — | — | single_source | |
| OEM-X1-68 | Malfunction indicator lamp (MIL) | low_side_out | — | — | — | corroborated | |
| OEM-X1-69 | HO2S signal, bank 2 sensor 2 (post-cat) | lambda_nb_in | — | — | — | single_source | |
| OEM-X1-71 | VSS high signal (manual trans) | digital_in | SPEEDUINO-A-14 | Proto area 1 (flex fuel) | digital_in | corroborated | |
| OEM-X1-72 | VSS low signal (manual trans) | digital_in | SPEEDUINO-A-18 | Proto area 5 (clutch) | digital_in | corroborated | |
| OEM-X1-73 | Power ground | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-X1-9 | Brake switch signal | digital_in | — | — | — | corroborated | |
| OEM-X2-10 | Cylinder shutoff solenoid 1 (AFM) | low_side_out | — | — | — | corroborated | |
| OEM-X2-11 | Cylinder shutoff solenoid 4 (AFM) | low_side_out | — | — | — | corroborated | |
| OEM-X2-12 | HO2S heater low control, bank 1 sensor 1 | low_side_out | — | — | — | single_source | |
| OEM-X2-13 | HO2S heater low control, bank 2 sensor 1 | low_side_out | — | — | — | single_source | |
| OEM-X2-14 | Cylinder shutoff solenoid 2 (AFM) | low_side_out | — | — | — | corroborated | |
| OEM-X2-16 | Camshaft actuator solenoid (VVT) | low_side_out | — | — | — | corroborated | |
| OEM-X2-17 | Injector 8 | injector_out | SPEEDUINO-A-5 | Injector 4 | injector_out | single_source | |
| OEM-X2-18 | Injector 5 | injector_out | SPEEDUINO-A-1 | Injector 1 | injector_out | single_source | |
| OEM-X2-19 | Injector 6 | injector_out | SPEEDUINO-A-2 | Injector 2 | injector_out | single_source | |
| OEM-X2-2 | 5V reference (crankshaft sensor) | vref | SPEEDUINO-A-13 | 5V | vref | single_source | |
| OEM-X2-20 | Injector 1 | injector_out | SPEEDUINO-A-1 | Injector 1 | injector_out | single_source | |
| OEM-X2-21 | Engine coolant temperature (ECT) signal | temp_in | SPEEDUINO-A-19 | Coolant temp (CLT) | temp_in | corroborated | |
| OEM-X2-22 | ECT low reference | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X2-26 | Knock sensor 1 signal A | knock_in | — | — | — | corroborated | |
| OEM-X2-27 | Knock sensor 1 signal B | knock_in | — | — | — | single_source | |
| OEM-X2-29 | Knock sensor 2 signal A | knock_in | — | — | — | corroborated | |
| OEM-X2-3 | 5V reference (throttle body) | vref | SPEEDUINO-A-13 | 5V | vref | single_source | |
| OEM-X2-30 | Knock sensor 2 signal B | knock_in | — | — | — | single_source | |
| OEM-X2-32 | Generator field duty control | low_side_out | — | — | — | corroborated | |
| OEM-X2-33 | Oil level switch signal | digital_in | — | — | — | corroborated | |
| OEM-X2-34 | Oil pressure low reference | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X2-35 | Throttle body low reference | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X2-37 | Injector 2 | injector_out | SPEEDUINO-A-2 | Injector 2 | injector_out | single_source | |
| OEM-X2-38 | Injector 3 | injector_out | SPEEDUINO-A-3 | Injector 3 | injector_out | single_source | |
| OEM-X2-39 | Injector 4 | injector_out | SPEEDUINO-A-5 | Injector 4 | injector_out | single_source | |
| OEM-X2-40 | Injector 7 | injector_out | SPEEDUINO-A-3 | Injector 3 | injector_out | single_source | |
| OEM-X2-41 | 5V reference (oil pressure) | vref | SPEEDUINO-A-13 | 5V | vref | single_source | |
| OEM-X2-43 | 5V reference (MAP) | vref | SPEEDUINO-A-13 | 5V | vref | single_source | |
| OEM-X2-44 | 5V reference (camshaft sensor) | vref | SPEEDUINO-A-13 | 5V | vref | single_source | |
| OEM-X2-5 | Throttle actuator motor control 2 | hbridge_out | SPEEDUINO-A-32 | Idle stepper 1B | hbridge_out | corroborated | |
| OEM-X2-50 | Engine oil pressure signal | analog_in | — | — | — | corroborated | |
| OEM-X2-52 | Camshaft actuator low reference | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X2-53 | MAP low reference | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X2-56 | HO2S low reference, bank 1 sensor 1 | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X2-57 | HO2S signal, bank 1 sensor 1 (pre-cat) | lambda_nb_in | — | — | — | single_source | |
| OEM-X2-58 | Manifold absolute pressure (MAP) signal | analog_in | SPEEDUINO-A-11 | MAP sensor (0-5V) | analog_in | corroborated | |
| OEM-X2-59 | HO2S signal, bank 2 sensor 1 (pre-cat) | lambda_nb_in | — | — | — | single_source | |
| OEM-X2-6 | Throttle actuator motor control 1 | hbridge_out | SPEEDUINO-A-31 | Idle stepper 1A | hbridge_out | corroborated | |
| OEM-X2-60 | HO2S low reference, bank 2 sensor 1 | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X2-61 | Charge indicator signal | low_side_out | — | — | — | corroborated | |
| OEM-X2-63 | Throttle position sensor 2 signal | analog_in | — | — | — | single_source | |
| OEM-X2-64 | Camshaft position signal (4x) | trigger_in | SPEEDUINO-A-24 | Cam input / VR2+ | trigger_in | single_source | |
| OEM-X2-65 | Throttle position sensor 1 signal | analog_in | — | — | — | single_source | |
| OEM-X2-66 | Camshaft position low reference | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X2-68 | Crankshaft position signal (58x) | trigger_in | SPEEDUINO-A-25 | Crank input / VR1+ | trigger_in | single_source | |
| OEM-X2-69 | Crankshaft position low reference | sensor_ground | SPEEDUINO-A-12 + SPEEDUINO-A-23 | Ground + Ground | sensor_ground | single_source | |
| OEM-X2-70 | Ignition coil 1 control | ignition_out | SPEEDUINO-A-7 | Ignition 1 | ignition_out | single_source | |
| OEM-X2-71 | Ignition coil 8 control | ignition_out | — | — | — | single_source | |
| OEM-X2-72 | Ignition coil 7 control | ignition_out | — | — | — | single_source | |
| OEM-X2-73 | Ignition coil 2 control | ignition_out | SPEEDUINO-A-34 | Ignition 2 | ignition_out | single_source | |
| OEM-X2-74 | Ignition coil 6 control | ignition_out | — | — | — | single_source | |
| OEM-X2-75 | Ignition coil 5 control | ignition_out | — | — | — | single_source | |
| OEM-X2-76 | Ignition coil 4 control | ignition_out | SPEEDUINO-A-8 | Ignition 4 | ignition_out | single_source | |
| OEM-X2-77 | Ignition coil 3 control | ignition_out | SPEEDUINO-A-33 | Ignition 3 | ignition_out | single_source | |
| OEM-X2-78 | Coil low reference (odd bank) | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-X2-79 | Coil low reference (even bank) | ground | SPEEDUINO-A-10 + SPEEDUINO-A-9 | Ground + Ground | ground | single_source | |
| OEM-X2-8 | EVAP canister purge solenoid | low_side_out | — | — | — | corroborated | |
| OEM-X2-9 | Cylinder shutoff solenoid 3 (AFM) | low_side_out | — | — | — | corroborated |
Cut list
| Wire | From | To | Gauge (mm²) | Colour | Length | Signal | Ident |
|---|---|---|---|---|---|---|---|
| W1 | OEM-X1-73 | SP-GND-1 | 0.85 | no route | Power ground | — | |
| W2 | OEM-X2-78 | SP-GND-1 | 0.85 | no route | Coil low reference (odd bank) | — | |
| W3 | OEM-X2-79 | SP-GND-1 | 0.85 | no route | Coil low reference (even bank) | — | |
| W4 | SP-GND-1 | SPEEDUINO-A-10 | 0.85 | no route | Ground | — | |
| W5 | SP-GND-1 | SPEEDUINO-A-9 | 0.85 | no route | Ground | — | |
| W6 | OEM-X1-11 | SP-0V-1 | 0.5 | no route | HO2S low reference, bank 1 sensor 2 | — | |
| W7 | OEM-X1-23 | SP-0V-1 | 0.5 | no route | APP sensor low reference | — | |
| W8 | OEM-X1-30 | SP-0V-1 | 0.5 | no route | APP sensor low reference | — | |
| W9 | OEM-X1-38 | SP-0V-1 | 0.5 | no route | Intake air temperature (IAT) low reference | — | |
| W10 | OEM-X1-49 | SP-0V-1 | 0.5 | no route | HO2S low reference, bank 2 sensor 2 | — | |
| W11 | OEM-X2-22 | SP-0V-1 | 0.5 | no route | ECT low reference | — | |
| W12 | OEM-X2-34 | SP-0V-1 | 0.5 | no route | Oil pressure low reference | — | |
| W13 | OEM-X2-35 | SP-0V-1 | 0.5 | no route | Throttle body low reference | — | |
| W14 | OEM-X2-52 | SP-0V-1 | 0.5 | no route | Camshaft actuator low reference | — | |
| W15 | OEM-X2-53 | SP-0V-1 | 0.5 | no route | MAP low reference | — | |
| W16 | OEM-X2-56 | SP-0V-1 | 0.5 | no route | HO2S low reference, bank 1 sensor 1 | — | |
| W17 | OEM-X2-60 | SP-0V-1 | 0.5 | no route | HO2S low reference, bank 2 sensor 1 | — | |
| W18 | OEM-X2-66 | SP-0V-1 | 0.5 | no route | Camshaft position low reference | — | |
| W19 | OEM-X2-69 | SP-0V-1 | 0.5 | no route | Crankshaft position low reference | — | |
| W20 | SP-0V-1 | SPEEDUINO-A-12 | 0.5 | no route | Ground | — | |
| W21 | SP-0V-1 | SPEEDUINO-A-23 | 0.5 | no route | Ground | — | |
| W22 | OEM-X1-33 | SP-5V1-1 | 0.5 | no route | 5V reference (fuel tank pressure) | — | |
| W23 | OEM-X1-34 | SP-5V1-1 | 0.5 | no route | 5V reference (A/C pressure) | — | |
| W24 | OEM-X1-36 | SP-5V1-1 | 0.5 | no route | 5V reference (APP sensor) | — | |
| W25 | OEM-X1-56 | SP-5V1-1 | 0.5 | no route | 5V reference (APP sensor) | — | |
| W26 | OEM-X2-2 | SP-5V1-1 | 0.5 | no route | 5V reference (crankshaft sensor) | — | |
| W27 | OEM-X2-3 | SP-5V1-1 | 0.5 | no route | 5V reference (throttle body) | — | |
| W28 | OEM-X2-41 | SP-5V1-1 | 0.5 | no route | 5V reference (oil pressure) | — | |
| W29 | OEM-X2-43 | SP-5V1-1 | 0.5 | no route | 5V reference (MAP) | — | |
| W30 | OEM-X2-44 | SP-5V1-1 | 0.5 | no route | 5V reference (camshaft sensor) | — | |
| W31 | SP-5V1-1 | SPEEDUINO-A-13 | 0.5 | no route | 5V | — | |
| W32 | OEM-X2-68 | SPEEDUINO-A-25 | 0.5 | no route | Crankshaft position signal (58x) | — | |
| W33 | OEM-X2-64 | SPEEDUINO-A-24 | 0.5 | no route | Camshaft position signal (4x) | — | |
| W34 | OEM-X2-70 | SPEEDUINO-A-7 | 0.5 | no route | Ignition coil 1 control | — | |
| W35 | OEM-X2-73 | SPEEDUINO-A-34 | 0.5 | no route | Ignition coil 2 control | — | |
| W36 | OEM-X2-77 | SPEEDUINO-A-33 | 0.5 | no route | Ignition coil 3 control | — | |
| W37 | OEM-X2-76 | SPEEDUINO-A-8 | 0.5 | no route | Ignition coil 4 control | — | |
| W38 | OEM-X2-20 | SPEEDUINO-A-1 | 0.5 | no route | Injector 1 | — | |
| W39 | OEM-X2-37 | SPEEDUINO-A-2 | 0.5 | no route | Injector 2 | — | |
| W40 | OEM-X2-38 | SPEEDUINO-A-3 | 0.5 | no route | Injector 3 | — | |
| W41 | OEM-X2-39 | SPEEDUINO-A-5 | 0.5 | no route | Injector 4 | — | |
| W42 | OEM-X2-18 | SPEEDUINO-A-1 | 0.5 | no route | Injector 5 | — | |
| W43 | OEM-X2-19 | SPEEDUINO-A-2 | 0.5 | no route | Injector 6 | — | |
| W44 | OEM-X2-40 | SPEEDUINO-A-3 | 0.5 | no route | Injector 7 | — | |
| W45 | OEM-X2-17 | SPEEDUINO-A-5 | 0.5 | no route | Injector 8 | — | |
| W46 | OEM-X2-6 | SPEEDUINO-A-31 | 0.5 | no route | Throttle actuator motor control 1 | — | |
| W47 | OEM-X2-5 | SPEEDUINO-A-32 | 0.5 | no route | Throttle actuator motor control 2 | — | |
| W48 | OEM-X1-50 | SPEEDUINO-A-16 | 0.5 | no route | Fuel pump relay control (primary) | — | |
| W49 | OEM-X1-59 | SPEEDUINO-A-15 | 0.5 | no route | Powertrain relay coil control (main relay) | — | |
| W50 | OEM-X1-17 | SPEEDUINO-A-36 | 0.5 | no route | High speed cooling fan relay | — | |
| W51 | OEM-X1-51 | SPEEDUINO-A-35 | 0.5 | no route | Fuel pump relay control (secondary) | — | |
| W52 | OEM-X1-52 | SPEEDUINO-A-37 | 0.5 | no route | Starter enable relay control | — | |
| W53 | OEM-X1-58 | SPEEDUINO-A-38 | 0.5 | no route | Low speed cooling fan relay | — | |
| W54 | OEM-X1-63 | SPEEDUINO-A-29 | 0.5 | no route | A/C compressor clutch relay | — | |
| W55 | OEM-X1-64 | SPEEDUINO-A-30 | 0.5 | no route | HO2S heater low control, bank 2 sensor 2 | — | |
| W56 | OEM-X1-48 | SPEEDUINO-A-17 | 0.5 | no route | Tachometer output | — | |
| W57 | OEM-X2-58 | SPEEDUINO-A-11 | 0.5 | no route | Manifold absolute pressure (MAP) signal | — | |
| W58 | OEM-X1-29 | SPEEDUINO-A-22 | 0.5 | no route | Accelerator pedal position (APP) sensor 1 signal | — | |
| W59 | OEM-X1-10 | SPEEDUINO-A-21 | 0.5 | no route | HO2S signal, bank 1 sensor 2 (post-cat) | — | |
| W60 | OEM-X2-21 | SPEEDUINO-A-19 | 0.5 | no route | Engine coolant temperature (ECT) signal | — | |
| W61 | OEM-X1-37 | SPEEDUINO-A-20 | 0.5 | no route | Intake air temperature (IAT) signal | — | |
| W62 | OEM-X1-71 | SPEEDUINO-A-14 | 0.5 | no route | VSS high signal (manual trans) | — | |
| W63 | OEM-X1-72 | SPEEDUINO-A-18 | 0.5 | no route | VSS low signal (manual trans) | — |
Bill of materials
| Category | Part number | Manufacturer | Description | Qty | Unit |
|---|
ECU setup sheet
| Role | Engine ref | Engine signal | Sensor | ECU point | ECU function | ECU class | Setup flag |
|---|---|---|---|---|---|---|---|
| No configured channels. | |||||||
Findings
Open (19)
| Severity | Code | Subject | Message |
|---|---|---|---|
| error | NET_MERGED | OEM-X2-17 + OEM-X2-39 + SPEEDUINO-A-5 | 2 different OEM functions share one net: OEM-X2-17 Injector 8; OEM-X2-39 Injector 4 |
| error | NET_MERGED | OEM-X2-18 + OEM-X2-20 + SPEEDUINO-A-1 | 2 different OEM functions share one net: OEM-X2-18 Injector 5; OEM-X2-20 Injector 1 |
| error | NET_MERGED | OEM-X2-19 + OEM-X2-37 + SPEEDUINO-A-2 | 2 different OEM functions share one net: OEM-X2-19 Injector 6; OEM-X2-37 Injector 2 |
| error | NET_MERGED | OEM-X2-38 + OEM-X2-40 + SPEEDUINO-A-3 | 2 different OEM functions share one net: OEM-X2-38 Injector 3; OEM-X2-40 Injector 7 |
| error | REQUIRED_UNMAPPED | OEM-X1-19 | Required OEM function "Ignition 1 voltage (key hot)" (power_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X1-32 | Required OEM function "Accelerator pedal position (APP) sensor 2 signal" (analog_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X1-41 | Required OEM function "Mass air flow (MAF) signal" (analog_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X1-47 | Required OEM function "Ignition 1 voltage (key hot)" (power_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X2-63 | Required OEM function "Throttle position sensor 2 signal" (analog_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X2-65 | Required OEM function "Throttle position sensor 1 signal" (analog_in) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X2-71 | Required OEM function "Ignition coil 8 control" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X2-72 | Required OEM function "Ignition coil 7 control" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X2-74 | Required OEM function "Ignition coil 6 control" (ignition_out) is not connected to the new ECU. |
| error | REQUIRED_UNMAPPED | OEM-X2-75 | Required OEM function "Ignition coil 5 control" (ignition_out) is not connected to the new ECU. |
| warn | DBW_MOTOR_CURRENT | SPEEDUINO-A-31 | Cannot confirm Speeduino can drive the throttle motor: neither the motor stall current (OEM-X2-6) nor the peak rating of SPEEDUINO-A-31 "Idle stepper 1A" is known. |
| warn | DBW_MOTOR_CURRENT | SPEEDUINO-A-32 | Cannot confirm Speeduino can drive the throttle motor: neither the motor stall current (OEM-X2-5) nor the peak rating of SPEEDUINO-A-32 "Idle stepper 1B" is known. |
| warn | NET_FAMILY | OEM-X1-63 ↔ SPEEDUINO-A-29 | OEM-X1-63 "A/C compressor clutch relay" [low_side_out] is wired to SPEEDUINO-A-29 "Idle stepper 2B" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| warn | NET_FAMILY | OEM-X1-64 ↔ SPEEDUINO-A-30 | OEM-X1-64 "HO2S heater low control, bank 2 sensor 2" [low_side_out] is wired to SPEEDUINO-A-30 "Idle stepper 2A" [hbridge_out]. A half-bridge can act as a low-side switch only if configured that way. |
| info | UNMAPPED | OEM | 26 optional OEM pins are not mapped: OEM-X1-12 A/C refrigerant pressure signal; OEM-X1-24 Fuel tank pressure signal; OEM-X1-57 VSS output to ABS (128k); OEM-X1-61 EVAP canister vent solenoid; OEM-X1-65 HO2S heater low control, bank 1 sensor 2; OEM-X1-68 Malfunction indicator lamp (MIL); OEM-X1-69 HO2S signal, bank 2 sensor 2 (post-cat); OEM-X1-9 Brake switch signal; OEM-X2-10 Cylinder shutoff solenoid 1 (AFM); OEM-X2-11 Cylinder shutoff solenoid 4 (AFM); OEM-X2-12 HO2S heater low control, bank 1 sensor 1; OEM-X2-13 HO2S heater low control, bank 2 sensor 1; OEM-X2-14 Cylinder shutoff solenoid 2 (AFM); OEM-X2-16 Camshaft actuator solenoid (VVT); OEM-X2-26 Knock sensor 1 signal A; OEM-X2-27 Knock sensor 1 signal B; OEM-X2-29 Knock sensor 2 signal A; OEM-X2-30 Knock sensor 2 signal B; OEM-X2-32 Generator field duty control; OEM-X2-33 Oil level switch signal; OEM-X2-50 Engine oil pressure signal; OEM-X2-57 HO2S signal, bank 1 sensor 1 (pre-cat); OEM-X2-59 HO2S signal, bank 2 sensor 1 (pre-cat); OEM-X2-61 Charge indicator signal; OEM-X2-8 EVAP canister purge solenoid; OEM-X2-9 Cylinder shutoff solenoid 3 (AFM) |
Accepted (1)
| Code | Subject | Reason | By |
|---|---|---|---|
| REQUIRED_UNMAPPED | OEM-X1-20 | 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: needs add-on. Resolve these before building: - No drive-by-wire; needs a cable-throttle conversion or an external DBW controller - No knock input; the stock knock sensor would be unused - Only 4 ignition outputs for 8 cylinders: wasted spark (pair coils per firing order) - Only 4 injector outputs for 8 injectors: batch / semi-sequential injection - Trigger pattern for GM LS not checked yet Auto-mapped by auto_map() from the library pin data on 2026-10-11. Review every wire against both manuals before building. Open items: - Main-relay feed: no ecu_main_power pin on the stock or the new ECU - OEM-X2 75: Ignition coil 5 control: no free ignition output on Speeduino Speeduino - OEM-X2 74: Ignition coil 6 control: no free ignition output on Speeduino Speeduino - OEM-X2 72: Ignition coil 7 control: no free ignition output on Speeduino Speeduino - OEM-X2 71: Ignition coil 8 control: no free ignition output on Speeduino Speeduino - OEM-X1 41: Mass air flow (MAF) signal: no free maf/analog_0_5 on Speeduino Speeduino - OEM-X2 65: Throttle position sensor 1 signal: no free tps/analog_0_5 on Speeduino Speeduino - OEM-X1 32: Accelerator pedal position (APP) sensor 2 signal: no free tps/analog_0_5 on Speeduino Speeduino - OEM-X2 63: Throttle position sensor 2 signal: no free tps/analog_0_5 on Speeduino Speeduino - OEM-X1 19: Ignition 1 voltage (key hot): no rule for class switched_feed; wire by hand - OEM-X1 47: Ignition 1 voltage (key hot): no rule for class switched_feed; wire by hand Not wired: - OEM-X1 20: Battery positive voltage (batt hot): Speeduino Speeduino has no battery-constant input; not needed - OEM-X2 26: Knock sensor 1 signal A: no free knock input on Speeduino Speeduino - OEM-X2 27: Knock sensor 1 signal B: no free knock input on Speeduino Speeduino - OEM-X2 29: Knock sensor 2 signal A: no free knock input on Speeduino Speeduino - OEM-X2 30: Knock sensor 2 signal B: no free knock input on Speeduino Speeduino - OEM-X1 65: HO2S heater low control, bank 1 sensor 2: no free heater_low_side/low_side/ls_hs/hbridge on Speeduino Speeduino - OEM-X2 12: HO2S heater low control, bank 1 sensor 1: no free heater_low_side/low_side/ls_hs/hbridge on Speeduino Speeduino - OEM-X2 13: HO2S heater low control, bank 2 sensor 1: no free heater_low_side/low_side/ls_hs/hbridge on Speeduino Speeduino - OEM-X2 10: Cylinder shutoff solenoid 1 (AFM): no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-X2 14: Cylinder shutoff solenoid 2 (AFM): no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-X2 9: Cylinder shutoff solenoid 3 (AFM): no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-X2 11: Cylinder shutoff solenoid 4 (AFM): no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-X1 61: EVAP canister vent solenoid: no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-X1 68: Malfunction indicator lamp (MIL): no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-X2 16: Camshaft actuator solenoid (VVT): no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-X2 32: Generator field duty control: no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-X2 61: Charge indicator signal: no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-X2 8: EVAP canister purge solenoid: no free low_side/ls_hs/injector/hbridge on Speeduino Speeduino - OEM-X1 57: VSS output to ABS (128k): no free frequency_out/tacho/low_side/ls_hs on Speeduino Speeduino - OEM-X1 69: HO2S signal, bank 2 sensor 2 (post-cat): no free o2_narrowband/analog_0_5 on Speeduino Speeduino - OEM-X2 57: HO2S signal, bank 1 sensor 1 (pre-cat): no free o2_narrowband/analog_0_5 on Speeduino Speeduino - OEM-X2 59: HO2S signal, bank 2 sensor 1 (pre-cat): no free o2_narrowband/analog_0_5 on Speeduino Speeduino - OEM-X1 12: A/C refrigerant pressure signal: no free analog_0_5 on Speeduino Speeduino - OEM-X1 24: Fuel tank pressure signal: no free analog_0_5 on Speeduino Speeduino - OEM-X2 50: Engine oil pressure signal: no free analog_0_5 on Speeduino Speeduino - OEM-X1 9: Brake switch signal: no free switch_in/frequency_in/analog_0_5 on Speeduino Speeduino - OEM-X2 33: Oil level switch signal: no free switch_in/frequency_in/analog_0_5 on Speeduino Speeduino
Sources
| Reliability | Kind | Title | URL | Archive | Captured | SHA-256 |
|---|---|---|---|---|---|---|
| 4 | vendor_doc | MaxxECU webhelp: Wiring — plug-in ECU Chevrolet Corvette C6 (GM E38 ECM) | http://www.maxxecu.com/webhelp/wirings-pluginecu-chevrolet_corvette_c6_e38_ecm.html | — | — | — |
| 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 |
| 2 | community_copy | lt1swap.com: E38 ECM Connector Pinouts | https://lt1swap.com/E38 ECM Connector Pinouts.htm | — | — | — |