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post #1 of 10 (permalink) Old 04-12-2006, 03:03 PM Thread Starter
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Default How to Permanently Disable Traction Control

I know how to disable only when following the steps, but I remember most cars have a relay or fuse that you can pull to disable traction control.

Any ideas how to disable the traction control?
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post #2 of 10 (permalink) Old 04-12-2006, 04:01 PM
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I believe the traction control is there to protect the drive train (transmission, ICE, MG, etc.). If you disable the traction control, you will probably void your warranty also.
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post #3 of 10 (permalink) Old 04-12-2006, 05:59 PM
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I think TC is software-controlled, so there is no fuse specific for TC.

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post #4 of 10 (permalink) Old 04-12-2006, 06:37 PM
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Default Traction Control

Use at you own risk. Drive train damage could result. It takes a sensitive foot.
*****************
To DISABLE TRACTION CONTROL on the Prius:
1) Turn the car to ignition by pressing START twice without pressing the brake.
2) Floor the gas pedal two times (two full top to bottom pressings)
3) Make sure the Emergency brake is on now and put the car into NEUTRAL
4) Again press the gas pedal two times
5) Push PARK and press the gas pedal two more times
6) Now put your foot on the BRAKE and press START one time while holding the brake down.

The prius will reset traction control to normal the next time you start it

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Scan Gauge,
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Hey.. \"it's just a car...\"
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post #5 of 10 (permalink) Old 04-13-2006, 02:03 AM
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Will this trick work on a 2005?

I have a friend whose house is on the side of a hill. The driveway goes down to the house and is extremely steep. There are trees over the driveway. The leaves from the trees make the driveway very slippery. The last time I went over there I almost needed to call a tow truck to get out of the driveway.

Turning off the TC and a very slow and steady foot might do the trick next time.

2005 Prius. Seaside Pearl. Premium package "BC". Tinted windows. Nav/Bluetooh speed sensor interupt. Additional Kenwood bass. Toyota XM. More to come.....
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post #6 of 10 (permalink) Old 04-13-2006, 12:18 PM
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What exactly do you mean by "permanently"? THis method only applies until you shut down.

Wyou bypass this way the throttle will open only to one of several preprogrammed degrees to force fixed RPM operation of the ICE:

- The idling speed in inspection mode is approximately 1,000 rpm.
- The engine speed increases to 1,500 rpm if the accelerator pedal is depressed by less than 60%.
- If the accelerator pedal is depressed by more than 60%, the engine speed increases to 2,500 rpm.

Not sure how the car performs with these "digital" ICE speeds. Maybe the PSD smooths it, maybe you drive very jerkily. I'm not inclined to be the test subject...

2005 Seaside Pearl, BC#6
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post #7 of 10 (permalink) Old 04-14-2006, 07:13 PM
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Default Re: How to Permanently Disable Traction Control

Quote:
Originally Posted by D
I know how to disable only when following the steps, but I remember most cars have a relay or fuse that you can pull to disable traction control.

Any ideas how to disable the traction control?
Here is the deal. The TC on the Prius is not only there to provide control to the driver, but also to prevent over reving of the internal components of the hybrid drive train. MGs 1 and 2 both have top level RPM limits which while driving the vehicle will not voilate under any conditions. Wheel spin could put either of the MGs into an over rev situation, which could damage them.

In slick conditions people often let wheels spin, even though it is highly unadvised, in order to maintain momentum on a slippry surface. However a conventional vehicle can damage parts that way also, the difference is that the parts you damage can handle a few out of controll wheel spins a couple of times without doing any long term damage. But on the Prius, Toyota being conservative, wanted to make sure that their engineered upper RPM limits were observed at all times. In a wheel spin situation the vehicle can't control the RPMs of the MGs. So, the only way to control it is through clamping down on the out of control wheel.

The stock tires tend to break away pretty easily under less than ideal conditions, which then leads to TC kicking in and stopping the out of control wheel.

Defeating the TC just to climb a hill is not advisable considering the purpose for the protective TC activity.

It has been said:
Hybrid drivers come in 3 flavors, greenie, techie and cheapie. Pick any 2.
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post #8 of 10 (permalink) Old 04-14-2006, 10:56 PM
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Default Re: How to Permanently Disable Traction Control

Quote:
Originally Posted by jeromep
Quote:
Originally Posted by D
I know how to disable only when following the steps, but I remember most cars have a relay or fuse that you can pull to disable traction control.

Any ideas how to disable the traction control?
Here is the deal. The TC on the Prius is not only there to provide control to the driver, but also to prevent over reving of the internal components of the hybrid drive train. MGs 1 and 2 both have top level RPM limits which while driving the vehicle will not voilate under any conditions. Wheel spin could put either of the MGs into an over rev situation, which could damage them.

In slick conditions people often let wheels spin, even though it is highly unadvised, in order to maintain momentum on a slippry surface. However a conventional vehicle can damage parts that way also, the difference is that the parts you damage can handle a few out of controll wheel spins a couple of times without doing any long term damage. But on the Prius, Toyota being conservative, wanted to make sure that their engineered upper RPM limits were observed at all times. In a wheel spin situation the vehicle can't control the RPMs of the MGs. So, the only way to control it is through clamping down on the out of control wheel.

The stock tires tend to break away pretty easily under less than ideal conditions, which then leads to TC kicking in and stopping the out of control wheel.

Defeating the TC just to climb a hill is not advisable considering the purpose for the protective TC activity.
Bottom line is get new tires to deal with the conditions under which you drive! Do not disable the TC, unless you want to disable your Prius then go ahead. Let everyone how it turns out!

operator of a 04' Millennium Silver BC #9 \\"Belle\\"
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post #9 of 10 (permalink) Old 04-15-2006, 03:24 PM
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Interesting thing is, my car allows a bit of spin more than it used to. A few days ago, I actually squeaked the wheels a bit going from a dirt path to asphalt. Didn't see the TC indicator flash either. It seems I am getting more traction now, being near the end of the tire's life, than when it was new.
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post #10 of 10 (permalink) Old 04-15-2006, 08:39 PM
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Quote:
Originally Posted by DanMan32
Interesting thing is, my car allows a bit of spin more than it used to. A few days ago, I actually squeaked the wheels a bit going from a dirt path to asphalt. Didn't see the TC indicator flash either. It seems I am getting more traction now, being near the end of the tire's life, than when it was new.
That's why I was so impressed. I thought the Prius was a glorified golf cart before my wife and I test drove it. She drove first. First thing she did was squeal the tires burning out from the dealership. I knew I was sold on the car right then. Of course, when I actually own the car I can't do any of that because it wastes gas and shortens the life of the tires.
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