No Lock-Up Or Lock-Up Off
WARNING: This page is about a different car, the 2002 Toyota ECHO, 2002 Toyota Celica, 2001 Toyota ECHO, and 2001 Toyota Celica. However, it is still accessible from the selected car via links, so may be relevant.
Check lock-up relay valve, lock-up control valve, solenoid relay valve, solenoid modulator valve and torque converter clutch.