FixVault

System Diagram

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying CAN Communication System Diagram (1 Of 2)
G05163384Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Identifying CAN Communication System Diagram (2 Of 2)
G05163385Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

The ECM uses the CAN communication system to perform DTC communication instead of the conventional communication line (SIL).