Rain Sensor Circuit

WIPER AND WASHER: WIPER AND WASHER SYSTEM: Rain Sensor Circuit
- Rain Sensor Circuit

DESCRIPTION

This circuit provides power to operate the rain sensor.

The auto wiper system operates when the wiper switch is in the AUTO position.

The rain sensor is connected to each ECU through the multiplex communication line. When the rain sensor detects raindrops in the detection area of the windshield glass, the sensor sends a wiper control signal according to the amount of raindrops to the main body ECU LH. The rain sensor also sends signals to the dynamic radar cruise control system and the mirror defogger system.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK RAIN SENSOR





(a) Disconnect the W4 sensor connector.

(b) Measure the voltage of the wire harness side connector.

Standard voltage:





OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- Continue to next step.

2. CHECK WIRE HARNESS (SENSOR - LIGHT)





(a) Disconnect the W4 sensor connector.

(b) Disconnect the W8 light connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE