Transponder Key Coil
WARNING: This page is about a different car, the 2002 Lexus GS 430 and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
Check that continuity exists between terminals No. 1 and No. 2 of the transponder key coil. See CONNECTOR IDENTIFICATION . If continuity is not as specified, replace the coil. See appropriate POWER TILT STEERING COLUMN SYSTEMS article.