The ECU pulses these pins to ground to open the fuel injectors.
Because Suzuki produced the K6A engine from 1994 through 2018, the ECU wiring configurations changed drastically across different generations, vehicle models, and induction types (naturally aspirated versus turbocharged). suzuki k6a engine ecu pinout
Isolated, clean ground loop inside the ECU specifically for 5V sensors. Essential Sensor Inputs The ECU pulses these pins to ground to