Secondary Throttle Sensor

With ignition switch in OFF position, disconnect secondary throttle sensor harness connector. Measure terminal side resistance between terminals "b" and "c" changes when closing secondary throttle valve by hand. With throttle valve fully open, resistance should be about 3000-5800 ohms. With throttle valve partially open, resistance should be 800-5800 ohms. With throttle valve fully closed, resistance should be about 800 ohms.