WIPER AND WASHER SYSTEM 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

A016329E01

INSPECTION PROCEDURE

Tech Tips


  • Before starting the following procedure, check that multiplex communication system (MPX) DTCs are not output Click here.

  • Before starting the following procedure, verify that the rain sensor tape is correctly installed.

PROCEDURE


  1. INSPECT RAIN SENSOR


    1. A0162XHE01

      Disconnect the R7 rain sensor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      R7-1 (SIG) - R7-3 (ES) Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    NG

    INSPECT OVERHEAD JUNCTION BLOCK (MAP LIGHT ASSEMBLY) Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. INSPECT OVERHEAD JUNCTION BLOCK (MAP LIGHT ASSEMBLY)


    1. A01605LE01

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      R5-23 (IG2) - R5-40 (GND2) Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    NG

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

    OK

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

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


    1. A01631RE07

      Disconnect the R5 overhead junction block connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      R5-39 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      R5-21 (IG) - R5-39 (GND) Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE OVERHEAD JUNCTION BLOCK (MAP LIGHT ASSEMBLY) Click here