Diagnostic Procedure
WARNING: This page is about a different car, the 2002 Toyota Land Cruiser, 2002 Lexus LX 470, 2001 Toyota Land Cruiser, and 2001 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
Remove and inspect operation of solenoids. See NO. 1 & NO. 2 SOLENOIDS under COMPONENT TESTS. If solenoids are okay, inspect valve body. See appropriate SERVICING or OVERHAUL article.