Driver Side Door Entry Unlock Function does not Operate: Description
WARNING: This page is about a different car, the 2010 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
If the driver side door entry unlock function does not operate but the entry lock function operates, the communication line between the vehicle and electrical key transmitter is normal. The part at fault may be an unlock sensor circuit (front door outside handle assembly [for driver side] → certification ECU).