OBD II port should be under the dash on the drivers side.
http://www.fixexpert.com/wiki/OBD-2+Location
The 1999 Toyota Avalon OBD 2 port is behind fuse cover
The 2005 Honda Accord OBD 2 port is under driver side dash above the kick panel
Im not sure about older year models, but on my 2004 the OBD II port is under the dash lip by my right knee. If I get out and squat down I can see it just fine.
The 2000 Honda Insight OBD 2 port is on right side edge of console; near floor
By law in the US the OBD II DLC (Data Link Connector) has to be within 18" of the steering column.
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 2001 Toyota Avalon OBD 2 port is under driver side dash above brake pedal
Under the dash, located just left of the steering column.
The 2000 Jaguar S-Type OBD 2 port is on lower edge of dash; right of steering column
The 1998 Dodge Ram OBD 2 port is under driver side dash next above accelerator pedal
Should be OBD I, OBD II is 1996 and newer