Rain Sensor Circuit

WIPER / 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 junction block 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 Multiplex Communication System.
* Before starting the following procedure, verify that the rain sensor tape is correctly installed.

PROCEDURE

1. INSPECT 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 -- INSPECT OVERHEAD JUNCTION BLOCK (MAP LIGHT ASSEMBLY)

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

2. INSPECT OVERHEAD JUNCTION BLOCK (MAP LIGHT ASSEMBLY)

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

Standard Voltage:

NG -- CHECK HARNESS AND CONNECTOR (OVERHEAD JUNCTION BLOCK - BATTERY AND BODY GROUND)

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

3. CHECK HARNESS AND CONNECTOR (OVERHEAD JUNCTION BLOCK - BATTERY AND BODY GROUND)

(a) Disconnect the R5 overhead junction block connector.

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

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE OVERHEAD JUNCTION BLOCK (MAP LIGHT ASSEMBLY) Service and Repair