Does my 1996 Toyota Tacoma have OBD 2?

The 1996 Toyota Tacoma is equipped with OBD I, not OBD II. OBD II systems became standard for all vehicles sold in the U.S. starting in 1996, but the Tacoma was among the last models to transition to this standard. If your Tacoma was manufactured early in the 1996 model year, it may still have the older OBD I system. To confirm, you can check the diagnostic port location or consult the vehicle's manual.