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.
This circuit provides power to operate the rain sensor.
The auto wiper system is operated the wiper switch being in the auto position.
The rain sensor is connected to each ECU at the multiplex communication circuit.
When it detects raindrops that are stuck to the detection area of the windshield glass, it sends the wiper control signal according to the amount of raindrops to the Passenger Side J/B ECU.
It also sends signals to the adaptive laser radar cruise control system, the mirror defogger system and others.