Door lock weirdness (1 Viewer)

[Galvezarchitect]

It’s intermittent and I have to go to the dealership to get it to reset they don’t know why: there is a setting deep in computer that switches to “disable remote.” Symptoms are obviously remote not working, starts and drives fine, handle touch open works and locks BUT rear door won’t lock at all, nor do controls work on back door won’t, no beep on door hand touch control but they do lock except back door. Super annoying, this is the send time in three weeks and the dealer has had my car for a week trying to replicate it, after resetting. Any ideas I can tell them? 2022 lexus Gx 470 luxury, crawl control/MTS option

 

[mtnco]

When you say back door and rear door, are you talking about the cargo door or the rear passenger doors?

 

[Galvezarchitect]

When you say back door and rear door, are you talking about the cargo door or the rear passenger doors?

Sorry yes the rear cargo door. It would be nice to know whats wrong, but I'm willing to live with “what series of actions cause this” I'm not doing anything weird just driving the car and locking the doors like a normal person.

 

[mtnco]

I had some intermittent weirdness when my back (cargo) door lock mechanism was going bad, but after re-reading your symptoms, I don’t think it applies.

I'm not sure if any of this changed for 2022/2023, but I found the following in the Electrical Wiring Diagrams for ≤2021:

• All the interior and exterior key fob antennas, door control receivers, and back (cargo) door lock/unlock buttons connect to the Certification ECU Assembly which then connects to the CAN network.
• The Main Body ECU then controls things like the "Wireless Door Lock Buzzer" (assuming this is the lock/unlock beeper?), the door lock relay, and the two door unlock relays.
• All the door locks receive the same LOCK signal from the Door Lock Relay and all doors but the Drivers door receive the same UNLOCK signal from the Door Unlock Relay.

Again, I'm not sure if something here changed for 2022, but it's strange that the drivers door, and maybe others too, locks but the cargo door does not, even though it's controlled by the same relay. And then the door beep not working, the remote being disabled, and the cargo door buttons not working.

Anyone have 2022/2023 system wiring diagrams?

 

[r2m]

One thing I've found is you have to have the remote key fob close to the back door for it to work.
Have you tried that?