Question about 1998 Lexus Gs 400

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Traction sign I have 98 GS 400, the Traction sign has lighted and check engin, but when I tried to drift the traction worked normally, so please any solution?

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  • sameh - Jul 22, 2008

    By the way, the sign automaticlly gone yesterday, is there any explaintion ?? please advise ...

  • lexo22 Dec 19, 2008

    I have a 1998 Lexus gs 400 and my vsc light stays on. I recently put 22" wheels on and I had to get it lifted, do you think that's the problem?

  • sameh - Apr 02, 2009

    but how come if the car is lowered it will be faster???

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I had my GS400 lowered on 20's and it definately rides much better than stock but if you like 22's getting the correct offset and wheel width will prevent you from having to lift the car.

When the VSC light comes on it possibly means some damage has occured to any 1 or more of the 4 speed sensors that are mounted on the each brake caliper. You'll need to run a diagnostic check to pin point which speed sensor it is that defective. The sensor cost appr. $250 at Toyota or Lexus dealer but look on eBay for a used one. The front senors are pretty easy to replace. I'm not sure about the rear sensors but since the sensor has a plug-in harness it make replacement relatively straight forward. DIY and you could save $150-200 labor.

Posted on Apr 02, 2009

  • DIY4free Apr 02, 2009

    Lowering a car is essentially lowering the center of gravity thus improving body roll when cornering especially at higher speeds giving you more control of the vehicle. Depending on the rate of the coil springs installed it will determine how responsive the ride will be. I would recommend a 1" to 1.5" drop. Any lower than that will affect the chamber more severely leading to advanced inner tire wear because the wheels will be tilting inwards much more (this condition is called negative chamber). An aligment is highly recommended after lowering the car. I installed H&R springs on my GS400 with the stock struts. It was a 1.5" front and and 1.3" rear drop and still a great ride in terms of comfort. Recommended brands for coil springs are Tein, Tanabe, Eibach, H&R or basically any proven Japanese or German company that makes spring coils. They cost appr. $200-300 for a set of 4 coil springs.

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The lexus gs400 is supposed to be lowered.I know that makes the car handel much better and faster..

Posted on Feb 16, 2009

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Traction control systems perform this in several ways. Some systems use independent braking to apply the brakes to the fastest spinning wheel. Other systems affect the engine so RPM is lowered and a combination of both methods may be used to brake one wheel while reducing engine RPM.

Now the spin counter can be mounted at each wheel or in the differential. Those that are mounted in the wheels are subject to debris like rust or brake pad material blocking the spin counters.

I can imagine the trans being tied into the traction system by limiting the trans from shifting into higher gears if the car thinks the wheels are already turning too fast.

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There is a good chance that with the traction control shut off, the car will shift normally. Then you can drive somewhere that can test the traction control and predict what is wrong.

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What does the TCS Off button do?


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The traction control system works in conjunction with your Antilock Brake System (ABS) and your Engine Control Module (ECM) or Powertrain Control Module (PCM) or Electronic Control Unit (ECU) (Note that ECM, ECU, and PCM all mean the computer that controls your engine, depending on make.)

Anyway, the traction control system can apply one or more of the brakes and control engine RPM in the event that a wheel slip has been detected by the traction control system.

Pushing the TCS button on most models will light a lamp in the instrument cluster that usually says "Trac Off" Pressing it a second time will turn this light back off.

When the "Trac Off" light is illuminated, the Traction Control System is disabled and will not work in the event of a wheel slip.

Also note that when the Traction Control System is working and a wheel slip is detected, The Traction Control Module will usually illuminate a light that says "Trac" as it is taking control of your brakes and engine. It can feel really strange when this occurs and some people think that their transmission is slipping or that their engine has a misfire problem.
The chances are that if it occurred on wet, slippery pavement, the Traction Control System may have just saved your life.

If this is happening on dry pavement and normal driving conditions (starting, stopping, or turning), there may be a problem with the system. "False Traction Control" can happen just like a bad wheel sensor causing "False Antilock Mode".

Also check your Owners Manual for more specific information pertaining to your particular vehicle.

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