[Mike B.]

Won't lock rear door. Checked fuses (passenger and engine) - all good. Got a new "Rear Trunk Tailgate Lock Actuator Motor Replacement" for Kia
Sorento 2011-2013 - did not help.
HOWEVER, found by trial and error, if I remove a

F/LID

15A

Tail Gate Relay, Tail Gate Actuator, Fuel Filler Door Switch

in the passenger fuse compartment then the rare door is locked, and cannot be opened (all other doors' locks work fine). If I place the 15A fuse back, again the rear door cannot be locked.
A Mystery!
Any suggestions on how to make the normal rear door lock function back?😅

 

[jolt2]

I would start with the information on this page: Kia Sorento: Power Door Lock Actuators Inspection - Power Door Locks - Body Electrical System - Kia Sorento XM 2011-2023 Service Manual

If you go to the bottom of the page you will see some testing info for the tailgate lock. Test if the switch is switching the signal to the lock actuator. The problem could be the switch, connections, or wiring. If the signal is not switching states at the lock actuator, then test the same signal at the switch. If the signal is not changing states at the switch then most likely the switch is bad. If the switch is changing states then the problem is somewhere between the switch and the actuator (wiring issue). You would then need to start tracing out the wire to find the problem.

 

[Mike B.]

I would start with the information on this page: Kia Sorento: Power Door Lock Actuators Inspection - Power Door Locks - Body Electrical System - Kia Sorento XM 2011-2023 Service Manual

If you go to the bottom of the page you will see some testing info for the tailgate lock. Test if the switch is switching the signal to the lock actuator. The problem could be the switch, connections, or wiring. If the signal is not switching states at the lock actuator, then test the same signal at the switch. If the signal is not changing states at the switch then most likely the switch is bad. If the switch is changing states then the problem is somewhere between the switch and the actuator (wiring issue). You would then need to start tracing out the wire to find the problem.

Thanks a lot! But where is the switch? It says Tailgate trim switch #6, but it is not on the diagram.

 

[jolt2]

The picture you have attached is not from the link I listed above. If you mix up information then that is up to you to keep it straight and figure it out. How do you open the door? Mine has one switch above the license plate, which is most likely the bad switch because of use, road water, salt, dirt, etc..... The other switch can be the one on the drives door master switch that has the door lock switch in it. I do not have a schematic for the wiring so I have limited info as there may be other things in this circuit that may limit the power too. Good luck testing with your meter.