Back 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 back door entry unlock function using the back door opener switch assembly does not operate but the back door lock function operates, one of the following may be malfunctioning: 1) the back door opener switch assembly, or 2) the certification ECU.
If the back door entry unlock function using the back door control switch does not operate but the back door lock function operates, one of the following may be malfunctioning: 1) the back door control switch, or 2) the multiplex network door ECU (back door P/W); or the multiplex network door ECU (back door P/W) receives the back door control switch unlock signal, but is unable to send the signal to the certification ECU through LIN and CAN communication.