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 at the multiplex communication circuit.

When it detects raindrops in the detection area of the windshield glass, the rain sensor sends a wiper control signal to the front controller according to the amount of raindrops detected.

It also sends signals to the adaptive laser radar cruise control system, the mirror defogger system and others.

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
Before performing this procedure, check that DTCs for the multiplex communication system are output Multiplex Communication System.

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Rain Sensor / Data List.

(e) Check the Data List for proper functioning of the rain sensor.

Rain Sensor:





OK:

The normal conditions listed above are displayed.

NG -- CHECK HARNESS AND CONNECTOR (RAIN SENSOR - BODY GROUND)

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

2. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - BODY GROUND)

(a) Disconnect the connector from the rain sensor.





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

Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (IGNITION SWITCH CIRCUIT)

(a) Disconnect the connector from the rain sensor.





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

Voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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