Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Circuit Description
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.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.