Idle Position Switch

On all DOHC engines, idle position switch is a separate switch mounted on throttle body. On all other models, idle position switch is incorporated in IAC motor or throttle position sensor, depending on vehicle application. When throttle valve is closed, switch is activated. When throttle valve is at any other position, switch is deactivated. This input from idle position switch is used by ECM for controlling fuel delivery time during deceleration.