DTCS Not Displayed, DTCS Continuously Displayed: Notes
WARNING: This page is about a different car, the 2004 Toyota Matrix and 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Use following procedure if DTCs are not displayed or AIR BAG warning light stays on when jumper wire is connected between terminals Tc and CG of DLC3, or if DTCs are displayed without connecting jumper wire between terminals Tc and CG of DLC3.