Circuit Description
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.
ABS solenoid relay supplies power to each ABS solenoid. After ignition switch is turned to ON position, if initial check is okay, relay is energized. ABS motor relay supplies power to ABS pump motor. While ABS is activated, ECU switches motor relay ON and operates ABS pump motor. If malfunction occurs in ABS solenoid relay circuit or ABS pump motor, ABS ECU cuts off current to ABS solenoid valve relay and prohibits ABS operation.