VSC TRAC comes on at too slow a speed in corners, not when it should and makes driving less safe

[TommoOZ]

Hello

I have a LC100 Sahara 2004 which when you are driving through corners the VSC TRAC works at to low a speed. On a Hyundai Terracan I own as well, I go through the same corner faster, and have no issue with traction. Happens into left hand bends more than right hand bends. On the wrong surface this slow down would cause problems. This is an Australian model.

I would like to be able to disable it, or have people had similar problem and what was the problem. Was it slack in the rack pinion or specific sensor problems. Or other issue that solved it. Has anyone disabled it without disabling the ABS, and how did they do it. Frankly I don't think its needed on bitumen road driving

Regards

 

[Blake1]

Do a search.. lots of threads on installing an on / off switch.. easy things. 1. have your Yaw sensor calibrated 2. Get an alignment. 3. Check for steering rack play. A non Toyota place won't know to zero set your yaw sensor

 

[BullElk]

Very likely the steering rack bushings are worn allowing entire rack to move when it shouldn't.

 

[Dirt J]

If you want to disable, here you go.

Possible culprits (maybe more?):

• Steering rack
• Steering rack bushings
• Wheel bearings
• Tie rod ends
• Ball joints
• Control arm bushings
• Wheel speed sensors
• Yaw rate sensor
• Steering angle sensor
• deceleration sensor
• VSC ECM itself
• Different size/inflated tires

Or combination of above.

 

[MongooseGA]

What rack bushings are in the truck? There are at least several of us who have had your experience after swapping in poly bushings. For this reason (and 100k hard miles, including several broke inner and outer tie rods) I will be putting in a new OEM rack with original rubber bushings shortly. Just waiting on parts arrival.

In the absence of bad or poly bushings, the list that Dustin @Dirt J gave is a great place to start inspecting.

 

[2001LC]

Check wheels bearings, for zero (correct) play.