Knock Sensor

Remove knock sensor. See REMOVE/INSTALL/OVERHAUL article. On GS300 and SC300, knock sensors are located on front and rear left side of cylinder block. On ES300, GS400 and SC400, knock sensors are located in front of engine, on inside of either cylinder head, under intake manifold. On LS400, knock sensors are located in front of engine, under intake manifold, on inside of left cylinder head and left side of lower intake manifold. On all models, check for continuity between knock sensor terminal and knock sensor body (hex portion). If continuity exists, replace sensor.