Overdrive Switch
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.
Disconnect electrical connector from O/D switch located on selector lever. Using a DVOM, ensure continuity exists between terminals No. 5 and 6 on Celica or terminals No. 2 and 4 on ECHO, with switch depressed (ON). See Fig 1 and Fig 2 . Ensure no continuity exists with switch released (OFF). Replace switch if defective.