CAN Bus Line: Description
WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
When all DTCs and sensors connected to the CAN communication system are not displayed on the intelligent tester's "BUS CHECK" screen via CAN VIM, first measure the resistance between the terminals of the DLC3 to specify the trouble area.