W1 OEM-3-A · Power ground SP-GND-1 — 0.85 mm² (≈18 AWG) — — — × W2 OEM-3-B · Power ground SP-GND-1 — 0.85 mm² (≈18 AWG) — — — × W3 OEM-3-C · Power ground SP-GND-1 — 0.85 mm² (≈18 AWG) — — — × W4 SP-GND-1 SPEEDUINO-A-10 · Ground — 0.85 mm² (≈18 AWG) — — — × W5 SP-GND-1 SPEEDUINO-A-9 · Ground — 0.85 mm² (≈18 AWG) — — — × W6 OEM-3-F · Signal ground SP-0V-1 — 0.5 mm² (≈20 AWG) — — — × W7 SP-0V-1 SPEEDUINO-A-12 · Ground — 0.5 mm² (≈20 AWG) — — — × W8 SP-0V-1 SPEEDUINO-A-23 · Ground — 0.5 mm² (≈20 AWG) — — — × W9 OEM-2-I · +5V sensor supply SPEEDUINO-A-13 · 5V — 0.5 mm² (≈20 AWG) — — — × W10 OEM-2-J · Crank position (CKP) SPEEDUINO-A-25 · Crank input / VR1+ — 0.5 mm² (≈20 AWG) — — — × W11 OEM-2-H · Cam position (CMP) SPEEDUINO-A-24 · Cam input / VR2+ — 0.5 mm² (≈20 AWG) — — — × W12 OEM-3-G · Ignition 1 (coils 1+4, wasted spark) SPEEDUINO-A-7 · Ignition 1 — 0.5 mm² (≈20 AWG) — — — × W13 OEM-3-H · Ignition 2 (coils 2+3, wasted spark) SPEEDUINO-A-34 · Ignition 2 — 0.5 mm² (≈20 AWG) — — — × W14 OEM-3-W · Injector 1 SPEEDUINO-A-1 · Injector 1 — 0.5 mm² (≈20 AWG) — — — × W15 OEM-3-X · Injector 2 SPEEDUINO-A-2 · Injector 2 — 0.5 mm² (≈20 AWG) — — — × W16 OEM-3-Y · Injector 3 SPEEDUINO-A-3 · Injector 3 — 0.5 mm² (≈20 AWG) — — — × W17 OEM-3-Z · Injector 4 SPEEDUINO-A-5 · Injector 4 — 0.5 mm² (≈20 AWG) — — — × W18 OEM-1-I · Condenser fan relay SPEEDUINO-A-16 · Proto area 3 (fuel pump) — 0.5 mm² (≈20 AWG) — — — × W19 OEM-1-R · Cooling fan relay SPEEDUINO-A-15 · Proto area 2 (fan) — 0.5 mm² (≈20 AWG) — — — × W20 OEM-1-S · A/C clutch relay SPEEDUINO-A-36 · Idle 2 (3-wire idle) — 0.5 mm² (≈20 AWG) — — — × W21 OEM-3-N · Fuel pump relay SPEEDUINO-A-35 · Boost — 0.5 mm² (≈20 AWG) — — — × W22 OEM-1-U · Front O2 heater SPEEDUINO-A-37 · PWM idle — 0.5 mm² (≈20 AWG) — — — × W23 OEM-3-V · Rear O2 heater SPEEDUINO-A-38 · VVT — 0.5 mm² (≈20 AWG) — — — × W24 OEM-3-O · ISC valve low side SPEEDUINO-A-31 · Idle stepper 1A — 0.5 mm² (≈20 AWG) — — — × W25 OEM-1-E · Malfunction indicator lamp (MIL) SPEEDUINO-A-32 · Idle stepper 1B — 0.5 mm² (≈20 AWG) — — — × W26 OEM-1-O · Alternator control SPEEDUINO-A-29 · Idle stepper 2B — 0.5 mm² (≈20 AWG) — — — × W27 OEM-1-Q · Charge lamp SPEEDUINO-A-30 · Idle stepper 2A — 0.5 mm² (≈20 AWG) — — — × W28 OEM-2-K · Tachometer output SPEEDUINO-A-17 · Proto area 4 (tachometer) — 0.5 mm² (≈20 AWG) — — — × W29 OEM-3-S · Pressure sensor (Mazda: EGR boost sensor) SPEEDUINO-A-11 · MAP sensor (0-5V) — 0.5 mm² (≈20 AWG) — — — × W30 OEM-3-E · Throttle position (TPS) SPEEDUINO-A-22 · TPS input — 0.5 mm² (≈20 AWG) — — — × W31 OEM-2-C · Front O2 signal SPEEDUINO-A-21 · O2 sensor — 0.5 mm² (≈20 AWG) — — — × W32 OEM-2-E · Coolant temperature (ECT) SPEEDUINO-A-19 · Coolant temp (CLT) — 0.5 mm² (≈20 AWG) — — — × W33 OEM-2-B · Intake air temperature (IAT) SPEEDUINO-A-20 · Inlet air temp (IAT) — 0.5 mm² (≈20 AWG) — — — × W34 OEM-2-D · Vehicle speed SPEEDUINO-A-14 · Proto area 1 (flex fuel) — 0.5 mm² (≈20 AWG) — — — × W35 OEM-1-F · Brake switch SPEEDUINO-A-18 · Proto area 5 (clutch) — 0.5 mm² (≈20 AWG) — — — ×