Disable ABS - Page 2 - Toyota RAV4 Forums
4.2 D.I.Y. and Modifications Share your RAV4.2 projects and ideas for future mods here!

User Tag List

Reply
 
LinkBack Thread Tools
#11 (permalink) Old 01-20-2013, 12:14 PM
Advanced Member
Country: vanib's Flag is: Canada
 
vanib's Avatar
 
Join Date: Sep 2011
Location: Ottawa, ON, Canada
Posts: 6,277
Thanks: 184
Thanked 482 Times in 434 Posts
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
On the 4.2, will removing the fuse disable VSC , ABS ,and traction control?

2008 Base Rav4, 4 Cylinder, 4WD
My upgrades Allen Spare tire Bike Rack
Currently listening to "Badlands" - Voodoo Highway
vanib is offline  
Sponsored Links
Advertisement
 
#12 (permalink) Old 01-20-2013, 01:23 PM
Junior Member
Country: Larryh86GT's Flag is: United States
 
Join Date: Sep 2009
Location: Near sunny Buffalo NY
Posts: 19
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by BikerJay View Post
This is not a Rav4 problem but a technical limitation of all ABS. On very slick surfaces ABS is not as effective as threshold braking.
As I stated - my car's ABS works very good on ice and snow. But it is a 2011 vehicle and I believe the technology has improved. I did ask my wife how she reacts to slippery conditions with the Rav4 and she says she pumps the brakes.
Larryh86GT is offline  
#13 (permalink) Old 01-20-2013, 02:30 PM
Advanced Member
Country: vanib's Flag is: Canada
 
vanib's Avatar
 
Join Date: Sep 2011
Location: Ottawa, ON, Canada
Posts: 6,277
Thanks: 184
Thanked 482 Times in 434 Posts
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
You are not supposed to pump the brakes with ABS. Just press the brakes as hard as you can.

That being said, there is slush and snow in the roads today.
I was driving 50 km/h and decided to brake for the red lights and the car would not stop, but hear the ABS kick in!!! I finally decided to just accelerate through the intersection!

So ABS was of no help today.

ABS did prevent an accident 2 weeks ago as it still allows the driver to control the car; i was able to get the RAV in a 45 degree angle; just enough so as not to hit the guy who was stopped at a red light in front of me.

Hard to say if I hate ABS

2008 Base Rav4, 4 Cylinder, 4WD
My upgrades Allen Spare tire Bike Rack
Currently listening to "Badlands" - Voodoo Highway
vanib is offline  
#14 (permalink) Old 01-20-2013, 04:47 PM
Junior Member
Country: Larryh86GT's Flag is: United States
 
Join Date: Sep 2009
Location: Near sunny Buffalo NY
Posts: 19
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
I am still wondering why not just leave the fuse out during the winter?

Last edited by Larryh86GT; 01-21-2013 at 08:57 AM.
Larryh86GT is offline  
#15 (permalink) Old 01-21-2013, 03:03 PM
Senior Member
Country: cutthroat22's Flag is: Canada
 
Join Date: Sep 2012
Location: BC
Posts: 201
Thanks: 29
Thanked 22 Times in 22 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
Larry: I don't leave it out all winter because our weather is variable and I don't mind the abs as long as there is not snow/ice. Usually it's above freezing. A switch would be ideal.

Vanib: I have done the intersection thing more than once with slick conditions...very bad feeling. Even coming to a dead slow stop, especially downhills, with abs you can glide 20 feet or more.

My 2003 does not have vsc/traction control or at least not lights for them.
cutthroat22 is offline  
#16 (permalink) Old 01-25-2013, 12:24 PM
Junior Member
Country: Larryh86GT's Flag is: United States
 
Join Date: Sep 2009
Location: Near sunny Buffalo NY
Posts: 19
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Question

I ran into a snag when I looked at my fuse box. Anyone know which fuse to pull to disable the ABS? The 30a or the 50a ???
Attached Images
File Type: jpg RAV4 fuses 1-25-13 009.jpg (122.4 KB, 16 views)
Larryh86GT is offline  
#17 (permalink) Old 01-25-2013, 01:11 PM
Advanced Member
Country: 03rav4inPA's Flag is: United States
 
03rav4inPA's Avatar
 
Join Date: Sep 2011
Location: Fairless Hills, PA
Posts: 717
Thanks: 11
Thanked 24 Times in 24 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
50a.

The 30a powers the ABS module itself and the 50a powers the pump. Be aware that pulling the 50a will also disable VSC

2003 Toyota Rav4 -- 2.0 VVT-I/Auto/4WD, 93k

Current Mods: Bugflector, AVS Ventvisors, Eclipse AVN30D, OEM Foglights, OEM Heated Mirrors

Future Mods: OEM rear-spoiler, OEM 'Sport' hood
03rav4inPA is offline  
#18 (permalink) Old 03-10-2013, 12:47 AM
Junior Member
Country: Ashley's Flag is: England
 
Join Date: Feb 2013
Location: Cape Town
Posts: 21
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Disable ABS? – Bad Idea

I don’t know whether you know this, but ABS is not supposed to improve / reduce your stopping distance.
When your wheels lock up, the car skids, then you lose the ability to stop and to steer.
It is supposed to allow you to continue to steer under hard braking. It is an electronic implementation of Cadence Braking.
ABS prevents the wheels locking up – when the rotation stops, the brake is released – wheel starts rotating again, the brake is applied. This cycle continues as long as the brake is applied – this is what causes the drumming sound and feeling in the brake pedal.
Because of what ABS does, it will worsen / increase your stopping distance.

If you want to make a stop in the shortest possible distance, then you need to use Threshold braking this is perfectly possible in a car equipped with ABS.

Because of this, the last thing you should do in icy conditions, when you need to make an emergency stop, is stomp on the brakes as hard as you can and hope for the best.
By all means, stomp on the brakes as hard as you can, but then you need to steer around the obstacle.

You want to disable the ABS? Really bad idea.
Ashley is offline  
#19 (permalink) Old 03-10-2013, 06:18 PM
Senior Member
Country: cutthroat22's Flag is: Canada
 
Join Date: Sep 2012
Location: BC
Posts: 201
Thanks: 29
Thanked 22 Times in 22 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
Quote:
Originally Posted by Ashley View Post
I don’t know whether you know this, but ABS is not supposed to improve / reduce your stopping distance.
When your wheels lock up, the car skids, then you lose the ability to stop and to steer.
It is supposed to allow you to continue to steer under hard braking. It is an electronic implementation of Cadence Braking.
ABS prevents the wheels locking up – when the rotation stops, the brake is released – wheel starts rotating again, the brake is applied. This cycle continues as long as the brake is applied – this is what causes the drumming sound and feeling in the brake pedal.
Because of what ABS does, it will worsen / increase your stopping distance.

If you want to make a stop in the shortest possible distance, then you need to use Threshold braking this is perfectly possible in a car equipped with ABS.

Because of this, the last thing you should do in icy conditions, when you need to make an emergency stop, is stomp on the brakes as hard as you can and hope for the best.
By all means, stomp on the brakes as hard as you can, but then you need to steer around the obstacle.

You want to disable the ABS? Really bad idea.
I completely hear what your saying. However, I've had my vehicle now for 10 years and my ABS absolutely sucks when there is ice, snow, mud etc and always has. MY rav4 stops much easier and safer without it. I have done hours of experimenting with and without on hills, in parking lots with different braking styles and always come to the conclusion the ABS in MY rav4 renders it dangerous.
cutthroat22 is offline  
#20 (permalink) Old 03-10-2013, 08:36 PM
Junior Member
Country: Ashley's Flag is: England
 
Join Date: Feb 2013
Location: Cape Town
Posts: 21
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
This is from the Wikipedia article about Cadence Braking:

"Cadence braking (or any other type of braking) will not help much on extremely slippery surfaces such as ice (in theory it would, but in practice the ice can be so slippery that it makes little difference — a winter tyre would make more difference). Also, on very loose surfaces, a quicker stop can be achieved by simply locking the wheels, causing a wedge of loose material to build up ahead of the wheels and create a substantial braking force. This is useful only when stopping in a straight line, because locking the wheels means all steering control would be lost. In such conditions, ABS actually increases the stopping distances. On poor surfaces, in the past, rally drivers timed the pulsing of brake application so as to take advantage of the load transfer as the vehicle pitches forwards and backwards in response to the initial braking effort. With modern overdamped, stiffly sprung suspensions this is less likely to be effective."

I can see this might work in snow and mud - but I'm not sure it would work on ice. But then no braking technique or system works without friction.
I also suspect that disabling the ABS might have consequences for your insurance cover.
The main point was that ABS is supposed to let you keep steering even under heavy braking - no ABS + slippery surfaces + heavy braking = no steering.

I'm lucky - I don't live in a country where we get freezing temperatures any more.
Ashley is offline  
Sponsored Links
Advertisement
 
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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

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

 
For the best viewing experience please update your browser to Google Chrome