Closed Throttle Position Switch
WARNING: This page is about a different car, the 1997 Mazda Millenia. However, it is still accessible from the selected car via links, so may be relevant.
Closed throttle position switch is part of Throttle Position (TP) sensor. To test closed throttle position switch, check TP sensor continuity. See THROTTLE POSITION SENSOR (TP) in ADJUSTMENTS - 2.3L article. Check TP sensor adjustment before replacing TP sensor.