Doors won't lock lights don't work unless vehicle is on? SOLVED!!

[HVLA]

Seriously weird thing just happened. Doors won't lock using the button on the door or the key fob. Interior lights don't come on when doors are open or even if I switch them to "on". However, once I turn the vehicle on the door locks work and the interior lights work. No codes, but the VSC and other lights on dash are on. Any ideas? I searched everywhere and can't find anything like this.

SOLVED BELOW!!!

 

[GoHerd]

How old is your Battery?

 

[HVLA]

How old is your Battery?

Battery isnt even a year old. I wouldnt think the vehicle would start if it was the battery. It is really strange. No dash lights, no interior light, locks dont work until the key is in and vehicle started up. Nothing on the dash at all until vehicle is on. Even the little red blinking key light doesnt come on.

 

[HVLA]

Wondering if it is a fuse. What fuse would control all that stuff, but not be effected when vehicle is on?

 

[GoHerd]

You could have Parasitic draw somewhere, draining some volts from the Battery where it needs the Alternator to kick in. I have a parasitic draw issue with an 08 RX. Where my lock, windows, and clock won’t show. Put a volt meter between battery terminals and it was pulling over .5 when should be under .02. I kept pulling fuses one by one until it dropped to normal. I found fuse bank labeled ECU2 was where the draw was. It controls all the windows, locks, interior lights, and VSC. I haven’t been able to discover where it is coming from exactly yet. Probably a bad internal relay stuck open somewhere. Need to take it in the service center, but haven’t yet.

I’ve had other vehicles throw codes, that disappeared when I got a new battery.

There are good videos on YouTube’s about investigating Parasitic draw.

 

[4Point7Lucky]

You could have Parasitic draw somewhere, draining some volts from the Battery where it needs the Alternator to kick in. I have a parasitic draw issue with an 08 RX. Where my lock, windows, and clock won’t show. Put a volt meter between battery terminals and it was pulling over .5 when should be under .02. I kept pulling fuses one by one until it dropped to normal. I found fuse bank labeled ECU2 was where the draw was. It controls all the windows, locks, interior lights, and VSC. I haven’t been able to discover where it is coming from exactly yet. Probably a bad internal relay stuck open somewhere. Need to take it in the service center, but haven’t yet.

I’ve had other vehicles throw codes, that disappeared when I got a new battery.

There are good videos on YouTube’s about investigating Parasitic draw.

Yeah, here's an oldie but goodie video:

 

[HVLA]

SOLVED!! Thanks to a thread i found on club lexus Gx470 Electrical problem - ClubLexus - Lexus Forum Discussion

ECU-B 10a fuse

And i think i realize now what happened. I went to turn off the vehicle and didnt turn it completely off before trying to turn the key to on. Im thinking this caused some kind of power surge.

Hopefully someone is helped by this thread in the future.

 

[4Point7Lucky]

SOLVED!! Thanks to a thread i found on club lexus Gx470 Electrical problem - ClubLexus - Lexus Forum Discussion

ECU-B 10a fuse

And i think i realize now what happened. I went to turn off the vehicle and didnt turn it completely off before trying to turn the key to on. Im thinking this caused some kind of power surge.

Hopefully someone is helped by this thread in the future.

Glad you were able to figure it out. Not knowing what to do is surely frustrating at first.

Please don't take this the wrong way but, in a positive way, These threads/solutions are why some OGs always tend to advice on searching as your first line of defense.
Again, Congratulations, glad it all worked out.

 

[HVLA]

Glad you were able to figure it out. Not knowing what to do is surely frustrating at first.

Please don't take this the wrong way but, in a positive way, These threads/solutions are why some OGs always tend to advice on searching as your first line of defense.
Again, Congratulations, glad it all worked out.

Oh trust me i know. I searched here, GXOR, and google. I just wasnt finding anything putting in my symptoms for some reason. When i started searching for fuse and wiring problems is when i found the club lexus post.

 

[GoHerd]

Cool, that’s what I meant to say in the earlier thread was the ECU-B fuse, not the ECU-2. My memory is faded. Glad it worked out!

 

[HVLA]

Well it happened again. Guess I should have scrolled down further on that clublexus post. Something with the mirrors is causing it. Moved the mirror selection to the center so it doesn't auto adjust down in reverse and it didn't blow the fuse again. Weird as hell.

 

[HVLA]

Ok so apparently this is not a common thing, but is known to happen. The mirror motor, usually the driver's side one apparently, starts going bad/shorting out. Temp fix is not to adjust the mirrors. Can't tell for sure if the permanent fix is either the Mirror Computer ($360) ouch, or the actuator ($88 each). Next step is to disassemble the driver's side mirror to inspect it.

On a funny side note, my other GX has an aftermarket driver's side mirror. Makes me wonder.

 

[az draht]

This happened to me. The fix , if your car is 2006 or older, is actually the mirror computer AND the mirror actuators. They updated the actuators midway through the 2006 model year to address the short in the mirror. As a result a new computer is needed also.

Check my posts for one on this issue. I believe I have one that gives the TSB and the part numbers

Found the post. Electrical help needed

 

[HVLA]

This happened to me. The fix , if your car is 2006 or older, is actually the mirror computer AND the mirror actuators. They updated the actuators midway through the 2006 model year to address the short in the mirror. As a result a new computer is needed also.

Check my posts for one on this issue. I believe I have one that gives the TSB and the part numbers

Found the post. Electrical help needed

Thank you. Mine is an 08 though. So i would already have the newer parts.

 

[HVLA]

Took it in to dealer. No surprise it was the driver's side mirror actuator. Awesome part is they are replacing it on their dime since we just bought it less than a month ago.

 

[4Point7Lucky]

Took it in to dealer. No surprise it was the driver's side mirror actuator. Awesome part is they are replacing it on their dime since we just bought it less than a month ago.

Now "That's" what you call a happy ending!!!