Idle Position Switch

On all DOHC engines and Sigma 3.0L, idle position switch is separate switch mounted on throttle body. On all other models, idle position switch is incorporated in ISC 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 ECU for controlling fuel delivery time during deceleration.