WIPER AND WASHER SYSTEM > Rain Sensor Circuit

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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 cowl side junction block ECU LH.
The rain sensor also sends signals to the adaptive laser radar cruise control system and the mirror defogger system.

WIRING DIAGRAM


E106818E02


INSPECTION PROCEDURE

HINT:
Before the procedure, check that the Multiplex Communication System (MPX) DTCs are not output (Click here).

1.CHECK RAIN SENSOR


    E107702E02

  1. Disconnect the Y4 rain sensor connector.

  1. Measure the voltage of the connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    Y4-1 (SIG) - Y4-3 (ES)
    		Engine switch on (IG)
    		10 to 14 V
    Y4-1 (SIG) - Y4-3 (ES)
    		Engine switch off
    		Below 1 V



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR (RAIN SENSOR - OVERHEAD JUNCTION BLOCK)
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE