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 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





INSPECTION PROCEDURE

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

PROCEDURE

1. CHECK RAIN SENSOR

(a) Disconnect the W4 rain sensor connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- CHECK HARNESS AND CONNECTOR (RAIN SENSOR - OVERHEAD JUNCTION BLOCK)

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

2. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - OVERHEAD JUNCTION BLOCK)

(a) Disconnect the W6 and W8 overhead junction block connectors.





(b) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR

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