Ensure sensors like the MAP or Throttle Position Sensor (TPS) receive a steady 5V reference signal from the ECU. Grounding: main relay drive circuit
| Pin Number | Function | Wire Color (Typical) | Notes | | :--- | :--- | :--- | :--- | | 1 | Injector #1 | Yellow/Blue | | | 2 | Injector #2 | Blue/Red | | | 3 | Injector #3 | Red/Blue | | | 4 | Tachometer Output | Yellow/Green | For cluster output | | 5 | Check Engine Light | Yellow/Red | Grounds bulb to illuminate | | 6 | A/C Compressor Relay | Blue/Black | Active Low | | 7 | Fuel Pump Relay | Black/Red | Controls fuel pump circuit | | 10 | Main Relay Power | Black/White | Battery Voltage (12V+) | Suzuki K6a Ecu Wiring Diagram Pdf
Used for closed-loop fuel management.