The VSC on my 2001 Runner activates at low speed for no apparent reason. Beginning from a dead stop, just after the vehicle starts rolling at 1-3...

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Customer

The VSC on my 2001 Runner activates at low speed for no apparent reason. Beginning from a dead stop, just after the vehicle starts rolling at 1-3 mph, the VSC will engage - I can hear the clicking sound from under the hood - and the vehicle will not accelerate. Sometimes the "skidding car light" on the dash will flash but not always. The problem happens in forward or reverse. Once the vehicle is going at least 5 mph, there is no problem.

Last updated
Charles Totherow
Toyota Mechanic

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Posted
Charles Totherow
Toyota Mechanic

One possible cause for the VCS to engage is if one or more of the wheel rotation sensors is not reporting wheel speed correctly (could be caused by excess mud/debris in the area of the sensor). But, I don't think that would have any effect on the braking system. I would get it to the dealer as soon as possible and have it checked out. It might be a problem with one of the ECU's.

Posted
Customer

How many ECU's are there?  Is there one for the VSC, one for the ABS, one main ECU for the entire vehicle, etc.?

Posted
Charles Totherow
Toyota Mechanic

The Main ECU is located on the passenger side behind the dashboard, under the airbag.

Posted
Charles Totherow
Toyota Mechanic

The Main ECU is located on the passenger side behind the dashboard, under the airbag.

The Body ECU is located on the Drivers side. The fuze panel is where the Body ECU is.

Posted
Customer

Is the body ECU part of the plastic fuse panel?  That is, if the fuse panel with all of the wires/connectors was unscrewed, the body ECU would be attached to or part of the panel?  I ask because I swapped the fuse panel from a 2002 4Runner into this 2001 4Runner in order to fix the door locks, which weren't functioning before I swapped the panels.

Posted
Charles Totherow
Toyota Mechanic

Yes that should be the location

Posted

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