2019 TRD Off Road - Power Window/Lock Trouble

New member - thank you for allowing me to join you. I've always done fairly well with mechanical issues but my electrical knowledge isn't that great. I have a 19 TRD Off Road that has been great - no problems and have around 52,000 miles on it. Just ran into my first problem with it and not sure what the deal is. My fob will not lock/unlock any of the doors, so I changed the battery but still have the same issues. I then realized that the switch(es) on the driver door will not lock/unlock either. But here is where it gets weird for me. Both front windows will go up/down with the controls on the driver door, and the passenger window operates normally from the passenger door. I'm not able to control either back window from the driver door. Rear left window goes up/down but can only be controlled by the switch on rear left door. Can't control the rear right window at all with either the driver door switch or right rear door switch. Just hoping someone can point me in the right direction. Thank you!

 

Do you know which power window system your truck has? There's with jam protection and without jam protection and they operate very differently.

 

I don't know - how would I determine which it has? Thank you!

 

With jam protection I believe has auto up/down on both front windows, without jam protection has auto down only on the driver's side.

 

It has auto up/down on both front windows. From driver door you can auto up/down either front window and from passenger door it has auto up/down for passenger window.

 

You may check the MPX-B Fuse (5A) in the interior fuse box otherwise I'm not sure how one would diagnose this one without a scanner that can talk to the Body ECU and Power Window Master Switch to see inputs and outputs.

Does the door locks work from the passenger door switch?

 

Thank you, no the locks won't work from passenger side either. I will check the fuse though.

 

Only other thing I can find that may be in common is Ground Point IA behind the left kick panel.
Can't really tell you anything else I know of to check without being able to talk to the modules on the truck.

Any recent mods?

Any water leaks that you have seen?

 

No recent mods and no leaks. I've never seen any water or moisture anywhere. I will also look for the ground you mentioned. Thanks so much for your help I really appreciate it.

 

I wish I had more for you but most of this operates on a LIN Bus, not really something you can check with a test light or meter.

What is curious is the left rear window works but the right rear doesn't, those are straight switched power and ground.
You could pop the right rear switch out and check for power on Pin 2 (White) and ground on Pin 3 (Black) & Pin 4 (Red), that may give us some direction for the window problem anyway.

 

Those diagrams are great!