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The Toyota Sequoia is a full-size SUV manufactured by Toyota and derived from its Tundra pickup truck. Introduced in 2000, the Sequoia is the first vehicle from a Japanese marque in the popular mainstream full-sized SUV class in North America.

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Traction control goes off randomly.

Why would the traction control go off randomly? Driving on dry pavement, straight ahead, traction control goes off and brakes are applied. Happens at highway speed and slow speed. Toyota Sequoia 2002.

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Hi Neva,

The traction control and ABS sensors are based on wheel speed sensors, one on each wheel. When those sensors get damaged, clogged with dirt/mud/tar/road grime, etc., or the wires break and they quit working or work intermittently, then you'll get all kinds of symptoms related to the ABS and/or traction control system.

That's the place I'd start, with checking the wires and making sure they aren't clogged up. You can test them electrically by hooking up a multimeter and measuring the voltage as you rotate the tire manually. Here's what you should see, according to smtnet.com.

The front wheel should be 190 - 1140mV, and the rear wheel should be higher than 650mV. If it meets the requirements, it means that the wheel speed sensor is working properly at this time.

Of course, it's always possible the ABS control module is faulty, or there is a wiring problem somewhere, but take it one step at a time and check the wheel speed sensors first, as they're the most vulnerable, being exposed to the elements and possibility of damage.

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