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Topic
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Alright, I have an ’06 Highlander Hybrid Limited
When braking under normal conditions, my vehicle pulls to the left and the front brakes tend to lock up. The ABS does not kick in. The newly installed rear left caliper does not work (It was properly bled until no more air came out of the valve). It was replaced because the previous caliper was seized.
What could cause the ABS to fail?
I was thinking the brake hose on the Rear Left may be shot, but would that cause the ABS to fail?
Could that cause the Front Right/Rear Left diagonal to brake unevenly making the it pull to the left?Any help with diagnosis of brake hose or ABS module? (or other)
[UPDATE]
Just checked the front brakes, the left wearing more than the right.
For good measure, I re-bled the brakes from Front Left to Rear Right then Front Right to Rear Left.
There were a few air bubbles in the rear left, everything else came out clean. While bleeding them, I noticed that braking with either of the front brake bleeders open the pedal goes down with ease. The rear brakes feel like they would normally, no give to them.
Is that normal?
After bleeding all four, it has actually become very hard to brake. (I have to slam on the brakes to get sufficient stopping power..
Along with that, my car is giving off a high pitch ring when ever I put it in drive. Why is this happening? I really would just bring it somewhere to get fixed, but I don’t have the money at the moment… HELP
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Is the ABS Light on?
Are the ABS Connectors plugged in to their positions at the wheel?
Fluid in the Brake Cylinder?
Have the front Calipers been checked for uneven wear? It’s possible one of the calipers in the front are sticking.
The ABS light is on, along with the VSC light.
From when I checked the connectors are in the correct positions.
The MC is filled to max.
I haven’t checked for uneven wear recently, I will check tomorrow and update.
Two things I suggest.
First pull the ABS codes, if you do not have an ABS reader, you can do it an alternate way… here is a link
http://www.clublexus.com/forums/rx-first-generation/353631-rx-300-pulsating-brake-pedal-3.html
Post your codes here.
Next check your caliper pins to see that they are not sticking and binding… A bound caliper can create the type of effect you are seeing.
Lastly it may be master cylinder related…
-Karl
I have 07 Camry Hybrid and you CAN NOT bleed brakes the usual way, reason being, there is no connection between the brake pedal and brakes and braking is done by brake actuator and accumulator.
What you need to find out, is if you by any chance have same system. Pretty much, bleeding can be done by a high end scanner that actuates multiple valves in actuator. Unintended pun. For my car, it’s $150 dealer exclusive.
Hence, before you fry something, as accumulator is $3000 replacement, why don’t you find what kind of brakes do you have? Has none to do with Hybrid system. It’s brake by wire system.
Also, go to Toyotanation>Highlander Hybrid, or THH forum and ask there. That’s my very friendly advice to you. Don’t mess with that stuff.[quote=”ToyotaKarl” post=127918]Two things I suggest.
First pull the ABS codes, if you do not have an ABS reader, you can do it an alternate way… here is a link
http://www.clublexus.com/forums/rx-first-generation/353631-rx-300-pulsating-brake-pedal-3.html
Post your codes here.
Next check your caliper pins to see that they are not sticking and binding… A bound caliper can create the type of effect you are seeing.
Lastly it may be master cylinder related…
-Karl[/quote]
I have rigged a couple fuses and will put the codes up when I have time to take the car out.
All the caliper pins a free.I believe ukrkoz is onto something though.
[quote=”ukrkoz” post=127933]I have 07 Camry Hybrid and you CAN NOT bleed brakes the usual way, reason being, there is no connection between the brake pedal and brakes and braking is done by brake actuator and accumulator.
What you need to find out, is if you by any chance have same system. Pretty much, bleeding can be done by a high end scanner that actuates multiple valves in actuator. Unintended pun. For my car, it’s $150 dealer exclusive.
Hence, before you fry something, as accumulator is $3000 replacement, why don’t you find what kind of brakes do you have? Has none to do with Hybrid system. It’s brake by wire system.
Also, go to Toyotanation>Highlander Hybrid, or THH forum and ask there. That’s my very friendly advice to you. Don’t mess with that stuff.[/quote]I’ve looked into this and it seems you may be correct. Though I will not bring it in to toyota on a whim that its just that. There is a cable that I can get that has the software that Toyota wouses for diagnosis/repair ie: Air Bleeding. It’s only $25.
It will either work and solve a big part of the problem, or I will just have an OBD2 scanner for my vehicle. No lossYes, this does have a different type of system and Toyota Techstream is needed for thorough bleeding. Here is a good link to let you know a little more about your braking system and techniques… Start at page 44… But the first step should be to discover what the car is telling you is wrong… 🙂
http://www.siucautomotive.com/presentations/bnj_hybrid_braking1.pdf
[quote=”crbzk” post=127969]I will not bring it in to toyota on a whim that its just that.[/quote]
Your serious brake trouble isn’t a whim. I’m all in favor of taking care of one’s own affairs, but after reading that document that ToyotaKarl posted, it seems like this is not a problem to tackle with severely limited resources.[quote=”Fopeano” post=128006][quote=”crbzk” post=127969]I will not bring it in to toyota on a whim that its just that.[/quote]
Your serious brake trouble isn’t a whim. I’m all in favor of taking care of one’s own affairs, but after reading that document that ToyotaKarl posted, it seems like this is not a problem to tackle with severely limited resources.[/quote]I understand the severity, trust me. But like I mentioned, I would take it in to a dealer but I don’t have a lot of money at the moment.. I’m a full time student, I brought the vehicle in when the problems began and they wanted me to pay $1,300 because of one bad caliper (they wanted to replace both calipers/rotors/pads and nothing less.) I couldn’t do it.
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