Circuit Description
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
Passenger side J/B ECU receives error signals from the headlight leveling system. It also sends signals of the alternator, headlight ON and the daytime running light to the Headlight Beam Level Control ECU and operates the headlight beam level control system.