MFI Control Relay

Multipurpose relay switches power to vehicle sensors and actuators including airflow sensor, crank angle sensor, idle speed control, injectors and fuel pump. When ignition switch is turned to ON position, ECM energizes coils controlling injectors,airflow sensor and idle speed control. When ignition switch is turned to START position, ECM energizes coils (through inhibitor switch on A/T models) to supply power to fuel pump. Relay failure will cause a no-start condition. For testing procedure, see SYSTEM/COMPONENT TESTS - 1.5L article.