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 windshield wiper switch assembly is in the AUTO position.

The rain sensor is connected to other ECUs through the multiplex communication line (BEAN).

When the rain sensor detects raindrops in the detection area on the windshield glass, the sensor sends a wiper control signal according to the amount of raindrops to the main body ECU LH (cowl side J/B LH).

The rain sensor also sends signals to the adaptive radar cruise control system and the mirror defogger system.

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
* Before starting the following procedure, check that multiplex communication system (MPX) DTCs are not output Reading and Clearing Diagnostic Trouble Codes.
* Before starting the following procedure, verify that the rain sensor tape is correctly installed.
PROCEDURE

1. CHECK RAIN SENSOR

(a) Disconnect the R7 rain sensor connector.





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

Standard voltage:





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

OK -- CHECK HARNESS AND CONNECTOR (RAIN SENSOR - OVERHEAD J/B)

2. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - OVERHEAD J/B)

(a) Disconnect the R5 overhead J/B connector.





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

Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (OVERHEAD J/B - BATTERY)

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR (RAIN SENSOR - OVERHEAD J/B)