I read the electrical schematic but found little information online or in the repair manual (Chilton) about the sensor. I even asked one Kragen guy when in store. Checked again after reading your post and couldn't find the sensor. Only a bare connector is there. I thought it's a spare connector. I guess the sensor got loose and went out. I'll check it out in local dealer tomorrow morning.

A similar case, but happened to Camry. http://www.camryforums.com/m_9254/tm.htm