W1 OEM-2-P · ISC valve +14V feed SP-14V-1 — 0.85 mm² (≈18 AWG) — — — × W2 OEM-4-AF · ECU power +14V (main relay) SP-14V-1 — 0.85 mm² (≈18 AWG) — — — × W3 OEM-4-D · VVT oil-control solenoid +12V feed SP-14V-1 — 0.85 mm² (≈18 AWG) — — — × W4 SP-14V-1 FT450-A-A13 · +12V switched — 0.85 mm² (≈18 AWG) — — — × W5 OEM-3-A · Power ground SP-GND-1 — 0.85 mm² (≈18 AWG) — — — × W6 OEM-3-B · Power ground SP-GND-1 — 0.85 mm² (≈18 AWG) — — — × W7 OEM-4-A · Power ground SP-GND-1 — 0.85 mm² (≈18 AWG) — — — × W8 SP-GND-1 FT450-A-A7 · Power ground — 0.85 mm² (≈18 AWG) — — — × W9 OEM-4-O · Signal ground SP-0V-1 — 0.5 mm² (≈20 AWG) — — — × W10 SP-0V-1 FT450-A-A12 · Signal ground — 0.5 mm² (≈20 AWG) — — — × W11 OEM-4-L · +5V sensor supply FT450-A-A14 · +5V sensor supply — 0.5 mm² (≈20 AWG) — — — × W12 OEM-3-Y · Crank position (CKP) FT450-A-A18 · RPM reference (crank -) — 0.5 mm² (≈20 AWG) — — — × W13 SP-0V-1 FT450-A-A18 · RPM reference (crank -) — 0.5 mm² (≈20 AWG) — — — × W14 OEM-3-V · Cam position (CMP) FT450-A-A17 · Phase input (cam) — 0.5 mm² (≈20 AWG) — — — × W15 OEM-3-F · Ignition 1 (coils 1+4, wasted spark) FT450-A-A8 · Ignition 1 — 0.5 mm² (≈20 AWG) — — — × W16 OEM-3-I · Ignition 2 (coils 2+3, wasted spark) FT450-A-A9 · Ignition 2 — 0.5 mm² (≈20 AWG) — — — × W17 OEM-2-A · Injector 1 FT450-A-A1 · Injector 1 (Bank A) — 0.5 mm² (≈20 AWG) — — — × W18 OEM-2-D · Injector 2 FT450-A-A2 · Injector 2 (Bank A) — 0.5 mm² (≈20 AWG) — — — × W19 OEM-2-G · Injector 3 FT450-A-A1 · Injector 1 (Bank A) — 0.5 mm² (≈20 AWG) — — — × W20 OEM-2-J · Injector 4 FT450-A-A2 · Injector 2 (Bank A) — 0.5 mm² (≈20 AWG) — — — × W21 OEM-4-X · Mass air flow (MAF) FT450-A-A20 · White input 1 — 0.5 mm² (≈20 AWG) — — — × W22 OEM-4-V · Throttle position (TPS) FT450-A-A21 · White input 2 — 0.5 mm² (≈20 AWG) — — — × W23 OEM-4-P · Coolant temperature (ECT) FT450-A-A24 · White input 5 (water temp) — 0.5 mm² (≈20 AWG) — — — × W24 OEM-2-B · Cooling fan relay FT450-A-A6 · Aux 4 (fuel pump / relays) — 0.5 mm² (≈20 AWG) — — — × W25 OEM-2-C · Condenser fan relay FT450-A-A3 · Aux 1 — 0.5 mm² (≈20 AWG) — — — × W26 OEM-2-K · A/C clutch relay FT450-A-A4 · Aux 2 — 0.5 mm² (≈20 AWG) — — — × W27 OEM-2-M · Fuel pump relay FT450-A-A5 · Aux 3 — 0.5 mm² (≈20 AWG) — — — × W28 OEM-4-AE · Pressure sensor (Mazda: EGR boost sensor) FT450-A-A23 · White input 4 (oil pressure) — 0.5 mm² (≈20 AWG) — — — × W29 OEM-4-AA · Rear O2 signal FT450-A-A22 · White input 3 (TPS) — 0.5 mm² (≈20 AWG) — — — × W30 OEM-4-W · Front O2 signal FT450-A-A25 · White input 6 (fuel pressure) — 0.5 mm² (≈20 AWG) — — — × W31 OEM-4-N · Intake air temperature (IAT) FT450-A-A26 · White input 7 (air temp) — 0.5 mm² (≈20 AWG) — — — ×