Toyota Brakes Still Rolling while Brakes Applied

[96bruzer]

Hello Everyone,

Did some research but did not find any answer.

I have two 4runners both 2004, one for each daughter and one of them would do this at a stop light while waiting for light. I would just be waiting not doing anything else like messing with radio or phone and it would start to move/roll a little bit even with the air conditioner off. I apply just a bit more pressure and vehicle stops.

Also, I currently have a 2008 Land cruiser and it would also do the same exact thing.

Also previously had two 100 series land cruiser and again one of them would do the same thing.

I was wondering what this could be and was thinking maybe the brake modulator needs adjustment? Is there anything else that can be adjusted?

Hope somebody chimes in that knows. Thanks!

 

[BlackWorksInc]

It's because of the way the hydraulically assisted system works. It's very consistent in pedal pressure vs. effort required, so at stop lights you can unconsciously under apply the brakes. The pedal effort at 0% and 75-ish% applied is very similar in feel, despite that effort being translated into a varying application of the brakes, so it's easy to have the vehicle creep on you if you're not a heavy braker.

Not much you can do, I mean SS brake lines seem to help with that a bit and if the rotors and pads are glazed that could contribute to that as well. But it's mainly a consequence of the brake system being so consistent in pressure/effort required. It's why a lot of new owners get concerned that the brakes feel "squishy" as many older and some modern vehicles still have that increasing resistance when applying the brakes.

 

[96bruzer]

It's because of the way the hydraulically assisted system works. It's very consistent in pedal pressure vs. effort required, so at stop lights you can unconsciously under apply the brakes. The pedal effort at 0% and 75-ish% applied is very similar in feel, despite that effort being translated into a varying application of the brakes, so it's easy to have the vehicle creep on you if you're not a heavy braker.

Not much you can do, I mean SS brake lines seem to help with that a bit and if the rotors and pads are glazed that could contribute to that as well. But it's mainly a consequence of the brake system being so consistent in pressure/effort required. It's why a lot of new owners get concerned that the brakes feel "squishy" as many older and some modern vehicles still have that increasing resistance when applying the brakes.

BlackWorksInc. Thank you for the info and I agree with you. Also just fyi, on my research, there are other toyota owners who have experienced this and also there are a total of five drivers in the family and we all experience the same symptoms on exactly the same vehicles. Besides the brake modulator(front and back adjustment), do you know of anything else that can be adjusted? Just really curious now of anything else that would help. Thanks!

 

[BlackWorksInc]

Honestly, it's a pretty closed system; there isn't much of any adjustment you can do to it.

 

[96bruzer]

Honestly, it's a pretty closed system; there isn't much of any adjustment you can do to it.

Okay sounds good thank you!

 

[NinjaOne]

It's because of the way the hydraulically assisted system works. It's very consistent in pedal pressure vs. effort required, so at stop lights you can unconsciously under apply the brakes. The pedal effort at 0% and 75-ish% applied is very similar in feel, despite that effort being translated into a varying application of the brakes, so it's easy to have the vehicle creep on you if you're not a heavy braker.

Not much you can do, I mean SS brake lines seem to help with that a bit and if the rotors and pads are glazed that could contribute to that as well. But it's mainly a consequence of the brake system being so consistent in pressure/effort required. It's why a lot of new owners get concerned that the brakes feel "squishy" as many older and some modern vehicles still have that increasing resistance when applying the brakes.

This answer helps me feel way better. I assumed coming from other Toyota's that there was something wrong with the brakes =)

 

[olegrad]

Thanks for the info. I thought I needed to upgrade to SS brake lines/bleed brakes.

 

[WflipCflopU]

I'm glad other people have had this issue, I thought it was only me. I came from a 2007 Honda Accord that IMO had overly sensitive brakes then switching to a 2003 V8 4Runner I thought I had to slam the brake through the floor to get it to stop. The first day of driving my 4Runner I misjudged all my stops and almost ran through the car in front of me. Good to know it's just the style of system Toyota runs and not a part that needs replacing or adjusting.