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The 2006 Toyota Sienna OBD 2 port is on "lower edge of dash, left of steering column"
The 2006 Toyota Corolla OBD 2 port is under dash at left, next to kick panel
Where is the OBD port 1992 Toyota Corolla?Read more: Where_is_the_OBD_port_1992_Toyota_Corolla
1994 Toyota pickups do not have obd II they have obd I. There is a " diagnostic port " under the hood but its not of much use.
The 1998 Toyota Avalon OBD 2 port is behind fuse cover
Some states test cars for pollution compliance by connecting a reader to the vehicle's OBD-II port. Your 1990 Corolla is exempt from OBD-II testing because you don't have an OBD-II port - they first came out in 2006.
The 1998 Toyota Corolla OBD 2 port is under driver side dash below hood release
The 2002 Toyota Land Cruiser OBD 2 port is under driver side dash above accelerator pedal
The 2003 Toyota Tundra OBD 2 port is under driver side dash above accelerator pedal
The 1999 Toyota Tacoma OBD 2 port is on lower edge of dash; next to console; connector faces down
The 1997 Toyota Avalon OBD 2 port is behind fuse cover
The 1998 Toyota Avalon OBD 2 port is behind fuse cover