Secondary Throttle Sensor

With ignition OFF, 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 is approximately 3000-5800 ohms. With throttle valve partially open, resistance is 800-5800 ohms. With throttle valve fully closed, resistance is approximately 800 ohms.