Diagnostic Procedure
WARNING: This page is about a different car, the 2003 Toyota Tundra, 2002 Toyota Tundra, and 2001 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
Ensure vehicle tires are all the same size and correct size for vehicle. Replace tires as necessary. If tire size is okay, check and replace ABS ECU. See ABS ECU/ACTUATOR under REMOVAL & INSTALLATION.