WIPER AND WASHER SYSTEM Rain Sensor Circuit

DESCRIPTION

The windshield wiper switch assembly receives a signal from the rain sensor to control the auto wiper system.

WIRING DIAGRAM

A019JVNE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. A019JN8E05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Rain Sensor)

      Disconnect the T3 rain sensor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      T3-4 (SIG) - T3-1 (ES) Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - WINDSHIELD WIPER SWITCH ASSEMBLY)


    1. for LHD, RHD Light Control Switch LH Side Type:


      1. A019KNBE01
        Text in Illustration
        *1

        Front view of wire harness connector

        (to Windshield Wiper Switch Assembly)
        *2

        Front view of wire harness connector

        (to Rain Sensor)

        Disconnect the F42 windshield wiper switch assembly connector.

      2. Disconnect the T3 rain sensor connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        F42-5 (MPX1) - T3-3 (MPX) Always Below 1 Ω
        T3-3 (MPX) - Body ground Always 10 kΩ or higher

    2. for RHD Light Control Switch RH Side Type:


      1. A019KNBE02
        Text in Illustration
        *1

        Front view of wire harness connector

        (to Windshield Wiper Switch Assembly)
        *2

        Front view of wire harness connector

        (to Rain Sensor)

        Disconnect the F81 windshield wiper switch assembly connector.

      2. Disconnect the T3 rain sensor connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        F81-5 (MPX1) - T3-3 (MPX) Always Below 1 Ω
        T3-3 (MPX) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT RAIN SENSOR


    1. A019LQWE07
      Text in Illustration
      *1

      Component without harness connected

      (Rain Sensor)

      Reconnect the rain sensor connector.

    2. Connect an oscilloscope to the automatic light control sensor connector.

    3. Check for pulses.

      OK
      Tester Connection Condition Specified Condition
      T3-3 (MPX) - T3-1 (ES) Engine switch on (IG) Pulse generation

    NG

    REPLACE RAIN SENSOR Click here

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here