Reverse Signal Circuit: Description
WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
The multi-display receives the reverse signal from the cowl side junction block ECU LH and sends the signal to the navigation ECU. The multi-display receives information about the GPS's antenna, and then adjusts the vehicle position.