Headlight Dimmer Switch Circuit [09/2014 - 10/2018]: Description

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Lexus RC 350, 2018 Lexus RC 300, 2017 Lexus RC 350, 2017 Lexus RC 300, and 2017 Lexus RC 200t. However, it is still accessible from the selected car via links, so may be relevant.

The main body ECU (multiplex network body ECU) receives the following switch information:

Light control switch in off*1, DRL OFF*2, tail, head or AUTO position
Dimmer switch in high, low or high flash (pass) position
Fog light switch in front*3 or off position

*1: w/o DRL OFF Switch
*2: w/ DRL OFF Switch
*3: w/ Front Fog Light