Interactive hybrid cars resource
GreenHybrid Home - Hybrid Cars
Hybrid Cars Discussion Forums
Hybrid Articles
Hybrid Mileage Database & Car Specs
Hybrid Car Photo Gallery
Shopping Guide for Hybrid Cars


Go Back   GreenHybrid - Hybrid Cars > Hybrid Cars > Toyota Camry Hybrid
Register FAQ Members List Search Today's Posts Mark Forums Read

Toyota Camry Hybrid The best-selling car in America.

Reply
 
Thread Tools Search this Thread
  #1 (permalink)  
Old 06-20-2007, 07:44 PM
REV800X REV800X is offline
Enthusiast
 
Real Name: Dave
Location: Cloquet, Minnesota
Hybrids: 07 TCH
Posts: 3
Default TCH Brake Issue

Has anyone noticed when driving a bit hard, and coming up to an intersection where you have to brake pretty hard, that if the road is chopped up or bumpy, the brakes suddenly release slightly and allow the car to coast a bit, requiring additional pedal pressure.... Nothing I can't deal with, but feel there is an issue with the road surface bumps messing with the computer controlled regen braking vs use of the brake pads..

Anyone else notice this? It only occurs if you brake pretty hard and the road is rough.

Other than that, 12K miles in 8 months and averaging about 36 mpg. Overall has been a great car.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #2 (permalink)  
Old 06-20-2007, 09:23 PM
CamryMan CamryMan is offline
Enthusiast
 
Real Name: Mr. H
Location: San Diego County
Hybrids: '07 TCH - Mag Gray/Ash/Nav/Fully Loaded
Posts: 17
Default Re: TCH Brake Issue

Yes, I notice this too, although I don't need for the road to be bumpy at all. In fact, Inotice this most often on the freeway when traffic suddenly slows down. This has occured on parts of the I-5 Fway that are both smooth and rough.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #3 (permalink)  
Old 06-20-2007, 09:38 PM
nash's Avatar
nash nash is offline
Ridiculously Active Enthusiast
 
Real Name: Nash
Location: San Diego
Hybrids: 05 FEH, 07 TCH
Posts: 576
Default Re: TCH Brake Issue

I have noticed this on occasion. On the other hand, once a dog ran out in front - panic stop was smooth and fast - I was amazed I was able to stop without hitting the dog. If I had been driving my truck the dog would have been a goner...

I have also noticed the TCH brakes seem to respond to how suddenly the brake pedal is pressed, even if only slight pressure is applied. I'm used to my truck where I need to get on the brakes quickly to be able to anticipate and react if the traffic suddenly changes. When I do the same on the TCH, the brakes jerk the car comming on stronger than I expect, then within a second release to light braking - without me changing pressure on the brake pedal. I'm adjusting to the TCH, but it is irritating when it happens.

.


Last edited by nash : 06-20-2007 at 09:42 PM.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #4 (permalink)  
Old 06-20-2007, 10:19 PM
Tideland Prius Tideland Prius is offline
Pretty Darn Active Enthusiast
 
Location: Canada
Hybrids: 2005 Toyota Prius Premium Package
Posts: 472
Default Re: TCH Brake Issue

Quote:
Originally Posted by REV800X View Post
Has anyone noticed when driving a bit hard, and coming up to an intersection where you have to brake pretty hard, that if the road is chopped up or bumpy, the brakes suddenly release slightly and allow the car to coast a bit, requiring additional pedal pressure.... Nothing I can't deal with, but feel there is an issue with the road surface bumps messing with the computer controlled regen braking vs use of the brake pads..

Anyone else notice this? It only occurs if you brake pretty hard and the road is rough.

Other than that, 12K miles in 8 months and averaging about 36 mpg. Overall has been a great car.
if it's what I'm thinking, it might also occur when you brake over a wet manhole cover or wet railway track.

.

Mods: EV mod, VVT-i emblem, sport pedals, OEM cargo mat, JDM Prius interior footwell lighting, Sylvania Silverstars 9003ST, DICE iPod kit, OEM all-weather mats, TomTom ONE v2, LED licence plate lights.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #5 (permalink)  
Old 06-20-2007, 10:28 PM
McGyver McGyver is offline
Active Enthusiast
 
Real Name: Tom
Hybrids: 2007 TCH, Blue
Posts: 142
Default Re: TCH Brake Issue

It sounds to me like your ABS is kicking in.

Rippled or un-even pavement while braking can causing inconsistent rotational speed between the wheels. This could be read by the ABS system as an impending lock-up. The corrective action is for the ABS to starting modulating braking force on the wheel it 'thinks' is about to lock up.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #6 (permalink)  
Old 06-21-2007, 04:21 AM
nomorebenz nomorebenz is offline
Active Enthusiast
 
Real Name: Fred
Hybrids: 2006 Toyota Highlander 4WD
Posts: 176
Default Re: TCH Brake Issue

The regenerative braking forces are very strong in these cars. So much so, that if left unchecked they would interfere with proper ABS implementation.
If the vehicle senses an emergency situation, it will turn off/reduce the braking regen in order to allow the ABS to function properly. This creates the sensation of acceleration. Often if your foot is not in emergency mode (ie. max pressure on the brake pedal), it is necessary to press harder on the brakes.
I used to feel this quite often when the car was new (HiHy). Now I barely ever feel it. BTW, the car stops on a dime when I need it to.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #7 (permalink)  
Old 06-21-2007, 05:51 AM
ken1784 ken1784 is offline
Pretty Darn Active Enthusiast
 
Location: Yokohama, JAPAN
Hybrids: 2004 Prius
Posts: 464
Default Re: TCH Brake Issue

This symptom is very common among Japanese Prius drivers too.
We also believe it is caused that the ABS system detects the slippage wheels and Prius abandons the regenerating, so you feel less braking power.
We found we can recover this situation by shifting to B, then we can see the regeneration again.

Ken@Japan
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #8 (permalink)  
Old 06-21-2007, 06:03 AM
nomorebenz nomorebenz is offline
Active Enthusiast
 
Real Name: Fred
Hybrids: 2006 Toyota Highlander 4WD
Posts: 176
Default Re: TCH Brake Issue

Quote:
Originally Posted by ken1784 View Post
This symptom is very common among Japanese Prius drivers too.
We also believe it is caused that the ABS system detects the slippage wheels and Prius abandons the regenerating, so you feel less braking power.
We found we can recover this situation by shifting to B, then we can see the regeneration again.

Ken@Japan
I lift my foot off the brake & reapply to reset the regeneration. Of course this is done only when it can be done safely.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #9 (permalink)  
Old 06-21-2007, 06:14 AM
mikieboyblue mikieboyblue is offline
Ridiculously Active Enthusiast
 
Real Name: Michael
Location: New York
Hybrids: TCH - 03/30/07
Posts: 1,084
Default Re: TCH Brake Issue

This sounds like what happens to me. You feel a bit of what you would think is ABS. But I believe and I think it was mentioned before, this is most likely moisture on the pads because the mechanical breaks are so seldomly used. I was worried when it first happened and tried to recreate it but was unsuccessful. It is random and usually the first full stop of the trip (or one of).
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
  #10 (permalink)  
Old 06-21-2007, 10:10 AM
Ookpik Ookpik is offline
Enthusiast
 
Hybrids: 2007 Camry Hybrid
Posts: 46
Default Re: TCH Brake Issue

Quote:
Originally Posted by mikieboyblue View Post
This sounds like what happens to me. You feel a bit of what you would think is ABS. But I believe and I think it was mentioned before, this is most likely moisture on the pads because the mechanical breaks are so seldomly used. I was worried when it first happened and tried to recreate it but was unsuccessful. It is random and usually the first full stop of the trip (or one of).
I had something similar happen the other day but I was driving for a while at low speeds through the neighborhood and came to a slow stop with little pressure on the brake and it felt like the ABS kicked in very hard. This was dry pavement,sunny day etc. Never happened again. Any thoughts?
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Topic Starter Forum Replies Last Post
TCH owners in Canada and some of cold States in USA pitokhato Toyota Camry Hybrid 12 05-28-2007 06:50 PM
New TCH w/Prius comparison (long) jreas Toyota Camry Hybrid 12 01-08-2007 06:01 PM
Ford Escape Hybrid Owner Complaints sdctcher Ford Escape Hybrid &
Mercury Mariner Hybrid
58 12-26-2006 04:34 AM
Purchased My Blue Ribbon Metallic TCH Yesterday!!! jeffeynboo Toyota Camry Hybrid 25 08-14-2006 11:17 AM
Does TCH with NAV tell you how hard to brake? Orcrone Toyota Camry Hybrid 5 07-06-2006 09:55 AM


All times are GMT -7. The time now is 12:11 PM.



This website is made possible by people like you.
Thank you.


HOME   .   DISCUSS   .   LEARN   .   COMPARE   .   SHARE   .   SHOP

About      Press Release      Contact

Suggested Link      Promote Hybrids      Site Store




COPYRIGHT © 2005-2006 Internet Brands, Inc. | Privacy Policy

SEO by vBSEO 3.0.0