ABS Warning Light
WARNING: This page is about a different car, the 2003 Toyota Prius, 2002 Toyota Prius, and 2001 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
Using special tool (09843-18040), turn ignition switch ON. Clear DTC stored in ECU by depressing brake pedal 8 or more times within 5 seconds. Check that the warning light shows normal code. Remove tool from terminal of DLC3.