2006 PULLS TO THE LEFT ON BRAKE

bigdaddy · 02-19-2006, 01:30 AM

Quote:

Originally posted by galaxee@Feb 19 2006, 01:21 AM
yeah, it's by-wire. give me a minute on the steering assist question. he's looking up something else for another thread at the moment.

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While he's doing that, let me do a stream on consciousness dump....

I see a traffic light ahead. It turns red. I take my foot of accellerator (spelling?) and begin to slow down. I then depress brake. (eyes closed trying to recall circumstances) **Most of the time** around 12-10-8-6 MPH the steering wheel really pulls counter clockwise. Firmly. So this is steer-by-wire? why would steering wheel really want to go counterclockwise? regen kicks off at 8 MPH, but I think it happens before and after this mark.

This is all hearsay in my mind. I'm going to have to go out tomorrow and document what is happening. Video camera and all.... Any suggestions of what to look for / document are welcome.

Sufferin' Prius Envy · 02-19-2006, 01:34 AM

One test you can try to help isolate the problem . . .

When the car is pulling to the side while braking, shift the car into neutral. This will get rid of any regen braking. If the car still pulls to the side, you know it's not the regen/”transmission” doing the pulling to the side.

Of course, be careful while doing this. Don't do it in traffic or when you really NEED the braking.

galaxee · 02-19-2006, 01:35 AM

ick. i was thinking of drive-by-wire, which is the throttle.

steering is direct.

Sufferin' Prius Envy · 02-19-2006, 02:12 AM

One other thought:

You mentioned the bleeding of the brakes and the “tests.” Do you know if they actually cleaned the brake rotors and pads? Sometimes you can have a contaminant on one of the brakes and it will either grab or slip more than the brakes on the other side of the car . . . causing a pulling feel.

Being that the Prius uses its mechanical brakes much less that an old technology car, the contaminant can remain in place for a longer period of time before having the chance of being burnt-off or rubbed away.

Maybe someone at the Toyota plant is getting a little too happy with a grease gun around the brakes.

mchinta · 02-19-2006, 03:34 AM

I too have 2006 Prius with package 8 and I didn't see some thing like this on my car.

ceric · 02-19-2006, 04:31 AM

From the descriptions, I would rule out alignment, tires and suspension issues because those issues pull vehicle to one side even w/o braking involved (such as let go of your steering slightly to see if the vehicle pull toward one side). If that is true (only happens in braking), I would guess the braking system/regen system.

Since Prius has the traditional braking and proprietary regen systems, it is hard to pin point which one. But I would bet on one of the two. You may want to go to another Toyota dealer for a second opinion.

Please keep us informed of the development. Thanks.

M. Oiseau · 02-19-2006, 05:47 AM

Ceric is right. With my Celica, there was a constant but very light pull to the left that became extremely pronounced under hard braking, enough to pull the wheel from my grip if I wasn't prepared for it.

So, if you don't have a constant pull, more or less, then it's probably not the tires.

Rancid13 · 02-24-2006, 04:27 PM

Quote:

Originally posted by icemanjrperu+Feb 18 2006, 05:10 PM--><div class='quotetop'>QUOTE(icemanjrperu @ Feb 18 2006, 05:10 PM)</div>

Quote:

Any comments? I really appreciate your advice on where to go with this, after TTL and extended warranty I paid over $32,000.00 for the vehicle and I don't think this is acceptable.

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My only comment is that $32K is A LOT for a Package 5. If I get the PC Extended Warranty here for $990, the total cost for my Prius will be just a couple hundred above $32,000. For a Package 8. And yes that's including sales tax and everything.

<!--QuoteBegin-galaxee@Feb 18 2006, 11:18 PM
of course. but who is the "rooster"?

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The evil penguin that thinks he a chicken in The Wrong Trousers. A classic. I love it when the penguin blinks his eyes.

agill · 02-24-2006, 05:08 PM

I have driven about 1000 miles on my 2006 now, and have not noticed this "pulling" effect either. Hopefully it will not come up in the future.

windstrings · 02-24-2006, 11:30 PM

Quote:

Originally posted by agill@Feb 24 2006, 03:08 PM
I have driven about 1000 miles on my 2006 now, and have not noticed this "pulling" effect either. Hopefully it will not come up in the future.

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Mine just broke a 1000 too!.... I never notice mine anymore.... maybe the computer finally balanced things... I remember the few times it did it, it felt like regen to me.

02-19-2006, 02:12 AM	#24
Sufferin' Prius Envy Platinum Member Join Date: Jul 2004 Location: USA Posts: 4,012 My Car: Other Non-Hybrid Model: Package: N/A Thanks: 0 Thanked 3 Times in 2 Posts Friends: 0	One other thought: You mentioned the bleeding of the brakes and the “tests.” Do you know if they actually cleaned the brake rotors and pads? Sometimes you can have a contaminant on one of the brakes and it will either grab or slip more than the brakes on the other side of the car . . . causing a pulling feel. Being that the Prius uses its mechanical brakes much less that an old technology car, the contaminant can remain in place for a longer period of time before having the chance of being burnt-off or rubbed away. Maybe someone at the Toyota plant is getting a little too happy with a grease gun around the brakes. __________________ My words are my word. I refuse to actively participate in any forum where my written words can/are changed by the powers that be. If you don't like what I wrote, delete it – but don't put words in my mouth that aren't mine. Good-bye.

02-19-2006, 04:31 AM	#26
ceric Senior Member Join Date: Oct 2004 Location: Fremont, CA Posts: 1,040 My Car: 2005 Prius Model: Package: #6 Thanks: 0 Thanked 43 Times in 16 Posts Friends: 0	From the descriptions, I would rule out alignment, tires and suspension issues because those issues pull vehicle to one side even w/o braking involved (such as let go of your steering slightly to see if the vehicle pull toward one side). If that is true (only happens in braking), I would guess the braking system/regen system. Since Prius has the traditional braking and proprietary regen systems, it is hard to pin point which one. But I would bet on one of the two. You may want to go to another Toyota dealer for a second opinion. Please keep us informed of the development. Thanks. __________________ 2005' Tideland Prius (Dec, 2004) Mods Done: body-side moldings, wood dash kit, rear bumper applique, ultrasound backup sensors, backup camera, signal mirrors, BT stiffening plate, 205/60R15 tires, leather-trim interior, all-weather mats, shark-fin antenna

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02-19-2006, 01:34 AM	#22
Sufferin' Prius Envy Platinum Member Join Date: Jul 2004 Location: USA Posts: 4,012 My Car: Other Non-Hybrid Model: Package: N/A Thanks: 0 Thanked 3 Times in 2 Posts Friends: 0	One test you can try to help isolate the problem . . . When the car is pulling to the side while braking, shift the car into neutral. This will get rid of any regen braking. If the car still pulls to the side, you know it's not the regen/”transmission” doing the pulling to the side. Of course, be careful while doing this. Don't do it in traffic or when you really NEED the braking.

02-19-2006, 01:35 AM	#23
galaxee resident lab rat Join Date: Mar 2005 Location: boilermaker territory Posts: 9,675 My Car: 2005 Prius Model: N/A Package: #5 Thanks: 0 Thanked 94 Times in 37 Posts Friends: 26	ick. i was thinking of drive-by-wire, which is the throttle. steering is direct.

02-19-2006, 03:34 AM	#25
mchinta Member Join Date: Nov 2005 Posts: 63 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	I too have 2006 Prius with package 8 and I didn't see some thing like this on my car.

02-19-2006, 05:47 AM	#27
M. Oiseau 6sigma this Join Date: Jan 2006 Location: Tulsa, OK Posts: 260 My Car: 2007 Prius Model: Package: #6 Thanks: 0 Thanked 0 Times in 0 Posts Friends: 1	Ceric is right. With my Celica, there was a constant but very light pull to the left that became extremely pronounced under hard braking, enough to pull the wheel from my grip if I wasn't prepared for it. So, if you don't have a constant pull, more or less, then it's probably not the tires.

02-24-2006, 05:08 PM	#29
agill Member Join Date: Sep 2005 Location: Lebanon (New Hampshire) Posts: 63 My Car: 2006 Prius Model: II Package: #3 Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	I have driven about 1000 miles on my 2006 now, and have not noticed this "pulling" effect either. Hopefully it will not come up in the future.