How do you clear error 3 code in factory 2001 Toyota 4Runner stereo?

To clear the error 3 code on a 2001 Toyota 4Runner stereo, first, turn off the vehicle's ignition and disconnect the car battery for about 10-15 minutes. This will reset the stereo system. After reconnecting the battery, turn on the stereo and enter the correct security code if prompted. If the error persists, consult the owner's manual or consider professional assistance.