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RAVMAN 51/M R4W Site Admin

Joined: 20 Dec 2004 Posts: 3038 Location: Vancouver, WA, USA
1996 Blue 2DR/4WD/5SPD

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Post: #1 Posted: May 1, 2006, 12:19 am Post subject: How to Disable Traction Control and VSC |
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[EDIT: A shorter version has been posted here http://RAV4World.com/forums/viewtopic.php?t=24363 ]
I ran across the following in Automobile Mag and wondered if it also worked on the 2006 RAV4
Link
| Quote: | After being continually frustrated with our inability to completely turn off the GS’s traction and stability control system, we recently learned from an anonymous source how to disable the overprotective electro-nanny. Road test coordinator Marc Noordeloos performed the complicated procedure, took a test drive, and, while grinning from ear to ear, pronounced the car transformed. If you own a 2006 GS (or IS), follow these steps and enjoy the slide. Once the car is started, you have thirty seconds to complete the process. With practice, the procedure can be completed in approximately fifteen seconds but, unfortunately, must be repeated each time the car is switched off.
1. Make sure the car is in Park and the parking brake is disengaged before you start the car.
2. Start the engine.
3. Engage the parking brake.
4. Fully depress the brake pedal and then release.
5. Fully depress the brake pedal and then release.
6. Disengage the parking brake.
7. Fully depress and hold down the brake pedal.
8. Engage the parking brake, then disengage it (while holding down the brake pedal).
9. Engage the parking brake, then disengage it (while holding down the brake pedal).
10. Release the brake pedal.
11. Engage the parking brake.
12. Fully depress the brake pedal and then release.
13. Fully depress the brake pedal and then release.
When “Check VSC" is displayed in the multifunction display along with the “Trac-off"ť icon indicator, you'll know that you have successfully completed the procedure. |
Anybody want to try it out? _________________ <-- Note: Larger Avatar! / SEARCH is your friend. |
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flyingn

Joined: 04 Jan 2006 Posts: 6287 Location: cinnaminson NJ
2006 Rav4 Limited/I4/4wd

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Post: #2 Posted: May 1, 2006, 3:21 am Post subject: |
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thats sounds like a cruel joke Kelly! after you go thru all that and it does work.. how do you make it active again?? _________________ ========
Defender of the 4 banger!!!!
http://tinyurl.com/7zoma <= website! |
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spwolfx
Joined: 12 Sep 2005 Posts: 375

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Post: #3 Posted: May 1, 2006, 4:03 am Post subject: |
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| considering how vsc functions as LSD for 4WD, I really see no point in disabling it. Plus, I tried to drive it hard during rain and I never heard any complains from VSC, despite adding lots of power on twisty mountain roads during rain. |
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bmorton 5+ Year Member
Joined: 30 Dec 2004 Posts: 2218 Location: Ontario
V6

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Post: #4 Posted: May 1, 2006, 4:52 am Post subject: |
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| Like Kelly's excerpt says, this sort of override for the stability control is only temporary until you turn off the engine. The next time you start out it's back on again. I can see wanting to turn it off occasionally when you want to have some fun. |
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John E Davies

Joined: 14 Mar 2006 Posts: 1758 Location: Spokane WA
2007 V6 Ltd 4wd

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Post: #5 Posted: May 1, 2006, 7:57 am Post subject: |
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Anyone have a wiring diagram? All you need to do is interrupt the road speed signal to the computer that controls the center diff lockup. Install a SPST switch and open that circuit and the system "should" stay engaged regardless of vehicle speed.
I haven't tried this, so take this advice with a grain of salt.
Anyone want to experiment?
John Davies
Spokane WA
EDIT: This is wrong, I thought we were talking about traction control. My mistake. JD
Last edited by John E Davies on December 11, 2006, 7:20 pm; edited 1 time in total |
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spwolfx
Joined: 12 Sep 2005 Posts: 375

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Post: #6 Posted: May 1, 2006, 11:24 am Post subject: |
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| why would you leave it on? I suggest you drive it a bit and decide if you really need an switch or not. System works perfectly and a lot more than what you would think. |
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BlackFlagMN
Joined: 01 May 2006 Posts: 34 Location: Minneapolis, MN
Toyota Rav4 Sport V6 4x4

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Post: #7 Posted: May 5, 2006, 2:43 pm Post subject: Confirmed, IT WORKS! |
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| I tried this on my RAV today on my way home from work and it works. Follow the procedure and it will turn off VSC until the car is turned off. I didn't notice any difference driving, but I'm still breaking it in, so I'm not driving it hard at all. I'm sure it will be fun to do someday though just to see how different it acts. |
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Harold

Joined: 09 Nov 2005 Posts: 128 Location: Winnipeg, MB
Rav4 V6 Ltd

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Post: #8 Posted: May 5, 2006, 6:15 pm Post subject: |
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| Thanks for posting this, its works great! It is something that I have wanted to be able to do since I upgraded from my gocart like 4.1. but had given up all hope. I suggest that this be posted in the mods section. |
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RAVMAN 51/M R4W Site Admin

Joined: 20 Dec 2004 Posts: 3038 Location: Vancouver, WA, USA
1996 Blue 2DR/4WD/5SPD

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Post: #9 Posted: May 6, 2006, 1:16 am Post subject: |
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| Harold wrote: | | I suggest that this be posted in the mods section. |
Good idea Done  _________________ <-- Note: Larger Avatar! / SEARCH is your friend. |
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inane
Joined: 28 Jun 2006 Posts: 1

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Post: #10 Posted: June 28, 2006, 2:59 am Post subject: |
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hey,
I saw this post, and the complexity involved in disabling the traction control...
I did a lot of research on the VSC ecu & system and came up with a way to disable it,
although its on a Caldina GTT not a RAV4, they are both 4wd toyotas right? so it may be worth testing it out...
A bit easier than the process you have listed there!!
its here: http://caldinafaq.blogspot.com
(dont worry... this isnt spam!!) |
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karrock 42/M R4W Moderator

Joined: 03 Jan 2005 Posts: 1324 Location: Northern VA
2008 Silver Acura RDX Tech

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Post: #11 Posted: June 29, 2006, 8:22 pm Post subject: |
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Anyone brave enough to attempt this surgery yet?  _________________ //Tony -- Three-time RAV'er! |
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dj06482
Joined: 24 Jan 2006 Posts: 187 Location: CT
2006 Pacific Blue AWD Base V6

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Post: #12 Posted: June 30, 2006, 7:01 am Post subject: |
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| karrock wrote: | Anyone brave enough to attempt this surgery yet?  |
Honestly, I haven't even disabled the VSC yet. I haven't even seen it kick in yet on my RAV, so I'm happy with it so far. I was exiting the highway via a wet, decreasing radius onramp the other day, and it didn't kick in at all. The tires were squealing, the RAV was sliding ever so slightly, and the VSC didn't jump in. So far, I like it, but I reserve the right to change that opinion after it kicks in for the first time
DJ |
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tblaum
Joined: 11 Apr 2006 Posts: 55 Location: Virginia
RAV4

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Post: #13 Posted: July 5, 2006, 4:46 pm Post subject: |
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Tried it today just to see the difference, all I can say is get ready to buy new tires soon if you leave it off all the time. This thing will light up the front tires.
Tim |
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Turning_Japanese
Joined: 14 Jul 2006 Posts: 17

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Post: #14 Posted: July 14, 2006, 9:54 pm Post subject: |
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| inane wrote: | hey,
I saw this post, and the complexity involved in disabling the traction control...
I did a lot of research on the VSC ecu & system and came up with a way to disable it,
although its on a Caldina GTT not a RAV4, they are both 4wd toyotas right? so it may be worth testing it out...
A bit easier than the process you have listed there!!
its here: http://caldinafaq.blogspot.com
(dont worry... this isnt spam!!) |
I have some experience with these systems but not specifically Toyota's. Certainly one way to defeat this type of safety system is to kill one of the required sensors such as Steering Angle Sensor (SAS), yaw rate sensor (YRS) or lateral accelerometer (LA). The problem is do you lose initialization (zero point) of the sensor when you kill it. I can't tell from the linked page whether you are switching power or communications to/from the SAS. If you killing the power you will loose the center or zero point, and it will have to re-initialize on repower. This is explained in the Toyota TSB VSC STEERING ANGLE SENSOR INITIALIZATION DURING PDS OR AFTER REPAIR (linked in the RAV4World TSB page). A safety problem can occur if it does not rezero at true zero. If so it will be biased in one direction, more prone to false interventions in one direction and less likely to intervene in the other. If you always have the wheel straight ahead at re-power up, you may be o.k. You could switch the communication circuits, but you introduce the risk of odd intermittent faults due to loss of signal integrity i.e. the main ECU is looking for handshake messages every 0,xxx seconds and if it doesn't get it a fault will light. As soon as the handshake comes back the fault is out. A good bump might be enough..........
The brake pedal/parking brake procedure at the top of the list sounds like a major pain, but you don't loose the sensor initialization that is critical to these systems.
Just my 2 cents worth. |
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muzzgail
Joined: 19 Jul 2006 Posts: 6
4.3

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Post: #15 Posted: July 19, 2006, 6:27 am Post subject: |
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Kelly's procedure at the top worked every time I tried it in my 06 Rav4. Thanks very much. I got bogged today on a very wet beach and needed this info as nothing would move. I'm ready for the next time. _________________ Murray |
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