...i think.

From the beginning:
I was waiting to go to class on Saturday and I noticed a faint burning smell, but it went away and I didn't think about it anymore. After I get out of class, I come out and my Unlock button isn't unlocking the car. So i figured, "damn, that smell must've been a fuse for the door locks going. i gotta change that."
Had stuff to do that night so i didn't get around to it until Sunday morning. Go to the garage, turn my LED's on for some extra light in the fuse area and PUFF. Thick white plumes of smoke coming out of my dash until I turned the switch back off.
What happened?
Somewhere in the wire that led to my driver's front door for the LED's, a short happened and the wire melted away the insulation and basically almost started a fire in my car. Yay, thanks fuse.
So after a few minutes to come down off of that, I go back and clean everything up. I took everything out cause if i decide to put lights back in, I'm gonna do it much better than I did the first time to prevent this from happening again.

Main problem
So I put my main dome light back to "Door" (it was on off because I used the ground from the Door Lock Control Relay to control my LED's according to what the dome would've done. I also had a master switch to keep them on whenever I wanted).
Anyways, dome light doesn't work. I think, "eh, whatever. I must've left something connected. Alas, I forgot my door locks aren't working either. Little light flicks on in head as i connect the two: "Hmm, maybe when the LED's shorted, the short ran back into the door lock control relay and fried it and that is why my door locks aren't working and the dome light doesn't work with the "Door" setting.
Main Question
Now, before I go to the dealership to try and buy the Door Lock Control Relay to replace, I looked online at the electrical manuals here on SL. Before the ground wire from the dome to the Door Lock Control Relay, there is a little box labeled IB2. I don't know what that is. I need to know if I maybe actually fried that and not the relay itself. Or even both >:[

so yea. Just hoping someone could be awesome and help me figure that out.

Symptoms
- Door lock and unlock on wireless fob don't work.
- Turn signals DO flash when I press unlock, but not Lock from wireless fob.
- Door lock/unlock buttons inside don't work.
- Dome light turns on in the "On' position, but not the "Door" position.
- Extreme anger at myself and that damn fuse that didn't blow.

Link to 2006 xB wiring guide:
https://www.scionlife.com/tech/elect...rical_xb06.zip

 

Try buying both parts used on www.car-parts.com .They can't be that much.

 

IB2 is just a connector joining harnesses, probably where it goes from under the dash to the door.

The door lock control relay is about $425. I burned the part of mine that controls the dome light, but my locks work fine.

 

So.. i take it you went to the dealership to replace it until u found out it was $425? Please say you didn't look for it used or at a Pick a Part place or something.

Also, since you say your dome doesn't work but your door locks do... do you think there might be another relay or something that fried?

 

bump

 

I think you can find used ones for about $150. I actually shorted 12 volts to the dome light ground when my voltmeter slipped when I was trying to wire my LED's to the dome light circuit. I just tied the dome light ground to the dash door indicator so my dome light comes on when the doors open, it just doesn't do the fade out or come on when you unlock the car.

 

Buy Randode's kit, it's prewired.

 

I just had a simple little 8 dollar led dome light, and I think just now (like 15 minutes ago) it blew a fuse. The light (or the old stock one) aren't working in any position, and neither are my wireless lock controls, or my radio. I didn't smell anything burning, unless the neighbors WEREN'T bbq'ing hot dogs outside. lol Came on here to find out what fuse leads to what.

 

Problem with the dome light is that it is driven by a transistor. That is what gives it that soft gradual turn-off. The only fuse is on the supply side of that transistor. If you short out the bulb circuit the transistor in the lock control relay will act as the fuse. Such is life....

 

except if that is what happened the door locks usually continue to work (at least mine do). It all depends on what you did to fry it. Check the wiring diagram here: https://www.scionlife.com/forums/viewtopic.php?t=138456

 

Fixed mine, luckily all it was was a blown fuse. Hope you can fix yours relatively inexpensively, Taugenichts.

 

ugh... i'm pretty sure the majority of the DLC relay is a fried. I checked evverryyy fuse and as far as i could tell everything was fine fuse-wise.

so... just to make sure... u replaced the dome fuse and it worked right?




also... if anyone happens to read a post about someone totaling their box could you let me know? maybe i could ask if they'd mind parting out their relay to me cheaper than what the dealer would have me get it at...

 

You might get lucky and find the same relay out of another Toyota in the junkyard. If you get one at PickNPull or another you-pull-it place, it shouldn't be more than $10 or so.

 

Yep, I just replaced the fuse for the dome/radio etc. and it worked alright. But I didn't have anything almost catch on fire like you did. So I think you've got a lot more work to do. I wish you the best of luck though!

 

the only time i've seen someone post that they got it from a junkyard they paid about $125-150

 

Did this ever get taken care of?

I ran into this thread while searching for something else and got to wondering...

====

The "Door Lock Control Relay" isn't really a "relay," but a small black box full if electronics that control all sorts of things, including the dome light when "door" is selected on the dome light switch.

The lead from the DLCR to the dome light is a "variable ground" coming from a small solid state device that only appears to be happy with less than about 2 amps flowing through it. Load a bunch of things onto the dome light circuit and the magic smoke escapes from the solid state device and it no longer works...

A side note on that: Since the lead from the DLCR to the dome light is a GROUND lead, it is NOT fused (only power leads are fused).

If you overload the DLCR dome light lead, or hit it with a raw 12 volts, the only thing there to blow is the transistor, not a fuse.

So, never overload the dome light circuit in an xB - a little too much current and *POOF!* it no longer works. If you need a larger amount of current controlled with the opening of the doors, connect to the INPUT side of the DLCR and use a relay so you don't damage the door switches with too high a load.

Hope y'all got the problems fixed!

See links in this thread for more info... https://www.scionlife.com/forums/viewtopic.php?t=254016