Clearance Sonar Main Switch Circuit: Description
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
The satellite switch (clearance sonar main switch) is installed at the base of the driver side instrument panel.
When the satellite switch (clearance sonar main switch) in turned ON, an ON signal is sent to the clearance warning ECU through the BEAN line The intuitive parking assist system operates according to this signal