B370D

Rain Sensor Mode Control Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Automatic wipers don't work
False alarms of wipers
Error message on the dashboard

Causes

Open or shorted wiring harness
Rain sensor malfunction
Sensor power problems
Oxidation of contacts
Software error in the control unit

How to Fix

Check the integrity of the wiring harness
Check the power supply and ground of the sensor
Clean sensor contacts
Test the rain sensor
Update control unit software
Replace sensor if necessary

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