Pskhaat
Tourer
Isn't the lock inertia-related? If it is an electrical signal for locking (I can't imagine?) that may make sense.Does anyone have thoughts on the seatbelt no longer locking when punching the brakes?
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Isn't the lock inertia-related? If it is an electrical signal for locking (I can't imagine?) that may make sense.Does anyone have thoughts on the seatbelt no longer locking when punching the brakes?
...the early transmissions that seem to like to let go with little warning...
I've been away a bit myself. What's this? Linkies?
4runners, GX, first gen tundras all use the same brake system.
I've 2000 w/560Km on the clock and brake are fine. Are they a service item, YES! Will it last a million miles and be reliable, YES. Provided properly maintained.I hate this thread. I went from "this thing will last me 500k, I'm going to drive the wheels off of it. I'll take it anywhere" to now "my brakes might go out at any minute, time to sell."
yeah.. i'm thinking.. why do I want to get one of these 16-20 yr old trucks?Oh great, so on top of the other potential catastrophic failures (AHC and the early transmissions that seem to like to let go with little warning), the brakes just randomly decide to sh*t the bed in these things, too? I don't even think this was being discussed yet last time I was on the forum. Wonderful.
I’m not a mechanic and have just recently gone through this process. So this is just me sharing what I wish I had done as preventative maintenance. It seems that when this happens it’s almost always the pump motor. So I wish I would have just replaced the pump motor with a new one. Costs about $600 to $700 + labor. It’s expensive but a lot better than the $3,300 + labor full master assembly replacement. Mine failed and I couldn’t find a reputable shop to replace only the motor which I’m guessing is due to liability. But, I’m betting if nothing has failed and it’s PM you could find a shop to install a new pump motor and accumulator and maybe even the $50 master cylinder rebuild kit.
Anyway, I wish I would have spent the $1000 to do that and have a pretty damn near new breaking system rather than paying more than double that now to replace the whole master cylinder assembly.
FYI, I had my truck completely checked out and baseline 3 months ago with special attention paid to the breaking system. Mechanic found no issues with the breaks. For me, the brakes were perfect until suddenly they no longer worked. I was fortunate to be pulling into my driveway after a long drive when they went out.
This issues is so over blown.
First we get audible alarm and lights on dash, if given pressure is not reached. Pay attention and stop, do not drive.
Any brake systems on any make or model can and will fail some day. These are moving parts!
Older and some different system today, were/are vacuum assist. That if engine shuts down vacuum lost, assist was/is lost. Same true if vacuum lost for any reason or diaphragm failed. The electrical motor brake assist, solved dead sticking (engine off while driving) brake failure. When either system fails we lose assist, but still have some brakes. But they are very very very pour brakes when trying to stop a heavy moving vehicle without assist, even with all the foot pedal pressure one can muster up.
Proper maintenance is key. This includes not over fill reservoir. Which so many well intending shad tree and certified mechanics and tech are doing. I see this in 50% of 100 and 200 series I inspect.
I've developed an inspection that can help give early warn of pump failure. Thanks in part to those that have shipped me their broken brake master parts (Thank you all). It's based on anecdotal evidence, that if brake booster motor control wire has any corrosion on them which includes nuts or screws. Then they be replaced and motors commutator inspected at that time.
I'm finding resistance of that ~$200 to $300 wire goes up from .5 new to .6 or .07. That anytime I find commutator has worn thought, wire is corroded and resistance is up.
Booster motor is not only reason for brake failure. But is the most common that presumably good PM has been missing. It gives little to no warning in many cases until last few pump of brake pedal.