Headlight Beam Level Control Actuator 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 headlight light control ECU sub-assembly LH and RH operate the headlight leveling motors according to the vehicle conditions.