2006 PULLS TO THE LEFT ON BRAKE

KTPhil · 02-18-2006, 09:06 PM

"If I brake on the highway, it does not pull (actually not pull on the car, it sort of pushes hard to make the steering wheel move counter clockwise)."

This phrase makes me wonder about the steering assist.

M. Oiseau · 02-19-2006, 12:53 AM

Have the dealer swap out the tires for you, no charge.

I had the same condition you're describing on a brand new Celica. After 4-wheel alignment, brake system check and bleed, and a new steering rack (all the dealer's ideas), the regional manager reviewed my "case" and right away had the dealer switch out the full set of tires. Problem solved.

Turns out that if the layup wraps in the tire's manufacture is slightly assymetric, then you'll get the pulling effect.

galaxee · 02-19-2006, 12:58 AM

ya, if it's radial pull in the tires the only way to fix it is to get new tires.

who is that character in your avatar??? it's familiar but i can't figure it out for the life of me!

M. Oiseau · 02-19-2006, 01:05 AM

who is that character in your avatar??? it's familiar but i can't figure it out for the life of me!

[snapback]212292[/snapback]

[/quote]
Uh... I'm a rooster, can't you tell. <blink. blink.>

galaxee · 02-19-2006, 01:18 AM

of course. but who is the "rooster"?

windstrings · 02-19-2006, 01:18 AM

I've noticed it very rarely.. and yes.. its to the left if it does it.. but it very subliminal.. not too obvious.

I figured it could be the regen brakes... in order for the 50K generator to make power it will slow the wheels down as it develops amps for regen "acts as braking" the friction brakes are rarely even being used at all!... its actually the alternator slowing the car.

I don't know how "both" front tires are tied into the electric motor.. but it would stand to reason if there is ever a time when they are not in perfect balance it would turn the car.

I really doubt its the tires... just my opinion.. because I would think a tire would be a consistent issue.... most of the time it never does it, but when it does it can be rather obvious. I suppose it could be dependent upon what the road texture is at any given time as to whether it would act up.

It doesn't do it often enough for me to be alarmed and it doesn't seem to be an issue for me.

I would like to know what does it however.
If its tires, then its no big deal to me...

bigdaddy · 02-19-2006, 01:18 AM

Quote:

Originally posted by KTPhil@Feb 18 2006, 09:06 PM
"If I brake on the highway, it does not pull (actually not pull on the car, it sort of pushes hard to make the steering wheel move counter clockwise)."

This phrase makes me wonder about the steering assist.

[snapback]212150[/snapback]

Tell me more, I need more ammo. 1) I am still confused after all of these miles, is the Prius a steer-by-wire vehicle? 2) IF so, where does steering assist come into play here?

windstrings · 02-19-2006, 01:20 AM

Quote:

Originally posted by M. Oiseau@Feb 18 2006, 10:53 PM
Have the dealer swap out the tires for you, no charge.

I had the same condition you're describing on a brand new Celica. After 4-wheel alignment, brake system check and bleed, and a new steering rack (all the dealer's ideas), the regional manager reviewed my "case" and right away had the dealer switch out the full set of tires. Problem solved.

Turns out that if the layup wraps in the tire's manufacture is slightly assymetric, then you'll get the pulling effect.

[snapback]212282[/snapback]

When you had your problem, was it a consistent symptom?...or was it intermittent?

galaxee · 02-19-2006, 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.

galaxee · 02-19-2006, 01:30 AM

if zero point calibration isn't run on the steering assist it might, MIGHT, do that. regen... you could test this by testing light braking (using regen only) vs heavier braking (like a panic stop) to test the hydraulic brakes.

have they checked adjustment of the rear brakes?

hard to tell without actually seeing the car...

02-19-2006, 01:18 AM	#16
windstrings Certified Prius Breeder Join Date: Sep 2005 Location: Central Texas Posts: 5,301 My Car: 2010 Prius Model: IV Package: Solar Roof Thanks: 2 Thanked 80 Times in 67 Posts Friends: 4	I've noticed it very rarely.. and yes.. its to the left if it does it.. but it very subliminal.. not too obvious. I figured it could be the regen brakes... in order for the 50K generator to make power it will slow the wheels down as it develops amps for regen "acts as braking" the friction brakes are rarely even being used at all!... its actually the alternator slowing the car. I don't know how "both" front tires are tied into the electric motor.. but it would stand to reason if there is ever a time when they are not in perfect balance it would turn the car. I really doubt its the tires... just my opinion.. because I would think a tire would be a consistent issue.... most of the time it never does it, but when it does it can be rather obvious. I suppose it could be dependent upon what the road texture is at any given time as to whether it would act up. It doesn't do it often enough for me to be alarmed and it doesn't seem to be an issue for me. I would like to know what does it however. If its tires, then its no big deal to me... __________________ Alan ________________________ 2010 Blue Ribbon Metallic IV with Bisque leather...."My Blue Baby" And my "other" cars...... 2006 Barcelona Red Prius Pkg #8 with Bisque leather.... Yea Baby, Yea! "The Hot Tamale" 2006 Silver Pine Mica Pkg#8 with Bisque leather.... "The Mint Julip" 2006 Mods so far: 1. Coastal EV switch 2. BT stiffening Plate 3.Zaino "the works" 4. Heat Shield "from Canvas Works" 5. Magnetic Oil plugs - Yes they work and you want them! 6. Speed sensor now switched!

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02-18-2006, 09:06 PM	#11
KTPhil Senior Member Join Date: Jan 2005 Posts: 1,313 My Car: Model: Package: Thanks: 0 Thanked 2 Times in 2 Posts Friends: 0	"If I brake on the highway, it does not pull (actually not pull on the car, it sort of pushes hard to make the steering wheel move counter clockwise)." This phrase makes me wonder about the steering assist.

02-19-2006, 12:53 AM	#12
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	Have the dealer swap out the tires for you, no charge. I had the same condition you're describing on a brand new Celica. After 4-wheel alignment, brake system check and bleed, and a new steering rack (all the dealer's ideas), the regional manager reviewed my "case" and right away had the dealer switch out the full set of tires. Problem solved. Turns out that if the layup wraps in the tire's manufacture is slightly assymetric, then you'll get the pulling effect.

02-19-2006, 12:58 AM	#13
galaxee resident lab rat Join Date: Mar 2005 Location: boilermaker territory Posts: 9,676 My Car: 2005 Prius Model: N/A Package: #5 Thanks: 0 Thanked 94 Times in 37 Posts Friends: 26	ya, if it's radial pull in the tires the only way to fix it is to get new tires. who is that character in your avatar??? it's familiar but i can't figure it out for the life of me!

02-19-2006, 01:05 AM	#14
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	who is that character in your avatar??? it's familiar but i can't figure it out for the life of me! [snapback]212292[/snapback] [/quote] Uh... I'm a rooster, can't you tell. <blink. blink.>

02-19-2006, 01:21 AM	#19
galaxee resident lab rat Join Date: Mar 2005 Location: boilermaker territory Posts: 9,676 My Car: 2005 Prius Model: N/A Package: #5 Thanks: 0 Thanked 94 Times in 37 Posts Friends: 26	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.

02-19-2006, 01:30 AM	#20
galaxee resident lab rat Join Date: Mar 2005 Location: boilermaker territory Posts: 9,676 My Car: 2005 Prius Model: N/A Package: #5 Thanks: 0 Thanked 94 Times in 37 Posts Friends: 26	if zero point calibration isn't run on the steering assist it might, MIGHT, do that. regen... you could test this by testing light braking (using regen only) vs heavier braking (like a panic stop) to test the hydraulic brakes. have they checked adjustment of the rear brakes? hard to tell without actually seeing the car...