Always confirm wire colors and pin locations with your vehicle’s factory manual. Pinouts evolve across model years and production months.
A "confirmation" signal sent back to the ECU to prove a spark occurred. Crank/Cam Signal Engine speed (RPM) and position data used for timing. PIM Pressure Intake Manifold Signal from the MAP sensor to measure engine load. THW Water Temp Signal Engine Coolant Temperature (ECT) sensor input. THA Intake Air Temp Measures the temperature of the air entering the engine. VCC Sensor Power 4s-fe ecu pinout
). Below is a guide to the primary pins you will need for wiring or diagnostics: Power & Ground : Switched 12V power from the EFI main relay. : Constant 12V from the battery (for ECU memory). E1 / E2 / E01 : Main chassis and sensor grounds. Ignition & Fuel : Ignition trigger signal to the igniter. : Ignition confirmation signal back to the ECU. Always confirm wire colors and pin locations with
Here is the ECU pinout for a 4S-FE engine: Crank/Cam Signal Engine speed (RPM) and position data