Back Door Entry Lock Function does not Operate: Description
WARNING: This page is about a different car, the 2011 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
If the back door entry lock function does not operate but the back door open function operates, the communication between the vehicle and key is normal. As a faulty part, the entry lock switch circuit (from the back door opener switch assembly (lock switch) to the certification ECU (smart key ECU assembly)) is suspected.