DCM Data Signal Circuit between Navigation ECU and DCM: Description
WARNING: This page is about a different car, the 2010 Lexus GS 460 and 2010 Lexus GS 350. However, it is still accessible from the selected car via links, so may be relevant.
This circuit is used to send and receive signals between the DCM (Telematics Transceiver) and display and navigation module display.