I would think the two are unrelated. But who really knows, weird stuff happens. You know how old the brake fluid is? Probably a little water logged. It's hydroscopic, meaning it absorbs and binds with h2o to prevent your system from rusting, and the water from boiling or freezing. Which it isn't anymore. Park inside, let thaw, bleed entire system. Just my guess.

Sent from my iPhone using YotaTech

 

Unless something has been changed by PO I just don't see how a OBDII code reader is working on a 92 4R.
It's not telling you what codes are stored, it's sounds like it's just telling what parts to throw at it.
As for brake problem X2 on what Carl said.

 

You also might want to disconnect battery and clear codes and re-check with jumper wire again.

 

Well every mechanic I have talked to says not too jump terminals. If you get the wrong terminals you could fry the whole computer. They make a code reader for obd1(pre 96) vehicles. It's not an obd2 scanner. But the wierd thing is we tried to check codes again after the brake problem occurred the first time and nothing came up. The time I did it before there was all kinds of codes. I would also assume the two problems are unrelated because it seems to be a brake issue not tranny/drive train. But I'm not too familiar with machanics so idk.

 

In the mechanic's defense, if you were completely inattentive to detail, couldn't read, or were utterly unable to do anything mechanical, I'd have said not to jumper terminals, too. But it's fine to do, otherwise Toyota wouldn't have had dealers doing it. I've been doing it for years. If you somehow jumpered 5 of them simultaneously, ya might have a small problem. You'll need to do it anyway, if you ever set timing or idle, or check fuel pump. It is completely safe to do.

Sent from my iPhone using YotaTech

 

For sure, idk I just think plugging the scanner and reading the screen seems simpler than counting 20+ series of flashes that could be over 80 characters long or more. He had a scanner that plugged in and told you what wasn't functioning properly in the electronic system. It could even tell you if your engine was misfiring. He needed to get an adapter for it that plugs into an obd1 diagnostic port. For now ill got the brakes fixed and then go from there. Wether the scanner works or I count the flashes doesn't matter to me as long as I get to see where the trouble is.

 

Yeah, I wasn't trying to be a dick. It did kinda sound that way, though. In reality, whatever works for you, works. I just appreciate the simplicity of a fairly modern rig, that I can fiddle with and adjust. It's cool, and that's what brought us here to begin with!! I do hope you can figure it out.

Sent from my iPhone using YotaTech

 

Ya I can understand that. I'm not very good with mechanics but I would like to learn that's why I'm trying to go about it myself instead of taking it to the shop. But idk maybe that's what I ought to do.

 

If your still having problems with the OD I have some info for you. I had the same problem when I bought my 92 4Runner a month ago. The Toyota transmission wont shift into OD until the engine gets to a certain temperature. Do you have a thermostat in it? Mine didn't and if the engine is not reaching the correct temp, it will never go into OD. That's probably the reason why it shifted on your way home after the day got warmer and engine warmed up quicker. I put a thermostat in it and now it warms up quicker and the OD is working like it is supposed to.

 

Ya I am still having problems with it. Thanks for the info ill looke into that. Where is the thermostat located?

 

Wouldn't not having a thermostat just make it overheat a lot?

 

No, it would run cold, due to no flow restriction or regulation. The system just flows as fast as the pump can push. With thermo, it restricts flow to build heat, increases flow to dissipate heat. Not only your thermostat can affect your tranny, though. If your coolant temp sensor is out of whack, it'll give incorrect readings to ECU and then to trans.

Sent from my iPhone using YotaTech

 

Just follow the lower radiator hose and it should be there inside of an aluminum housing with three studs holding down.