WIPER AND WASHER SYSTEM Rain Sensor Circuit

DESCRIPTION

The windshield wiper relay assembly receives a signal from the rain sensor via LIN communication to control the auto wiper system.

WIRING DIAGRAM

A002AM0E02

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - IG CIRCUIT AND BODY GROUND)


    1. A0029TUC08
      *a

      Front view of wire harness connector

      (to Rain Sensor)

      for LHD:


      1. Disconnect the S13 rain sensor connector.

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        S13-4 (SIG) - Body ground Ignition switch ON 11 to 14 V
        Ignition switch off Below 1 V

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        S13-2 (ES) - Body ground Always Below 1 Ω
    2. A0029TUC22
      *a

      Front view of wire harness connector

      (to Rain Sensor)

      for RHD:


      1. Disconnect the S14 rain sensor connector.

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        S14-4 (SIG) - Body ground Ignition switch ON 11 to 14 V
        Ignition switch off Below 1 V

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        S14-2 (ES) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (RAIN SENSOR - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) Click here

    OK

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


    1. for LHD:


      1. Disconnect the F79 windshield wiper relay assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        F79-14 (MPX1) - S13-1 (MPX) Always Below 1 Ω
        F79-14 (MPX1) or S13-1 (MPX) - Body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the F79 windshield wiper relay assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        F79-14 (MPX1) - S14-1 (MPX) Always Below 1 Ω
        F79-14 (MPX1) or S14-1 (MPX) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT RAIN SENSOR


    1. A0028RCC01
      *a

      Component with harness connected

      (Rain Sensor)

      for LHD:


      1. Connect the S13 rain sensor connector.

      2. Connect an oscilloscope to the rain sensor connector.

      3. Check for pulses.

        OK
        Tester Connection Condition Specified Condition
        1 (MPX) - 2 (ES) Ignition switch ON Pulse generation
    2. A0028RCC01
      *a

      Component with harness connected

      (Rain Sensor)

      for RHD:


      1. Connect the S14 rain sensor connector.

      2. Connect an oscilloscope to the rain sensor connector.

      3. Check for pulses.

        OK
        Tester Connection Condition Specified Condition
        1 (MPX) - 2 (ES) Ignition switch ON Pulse generation
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

    REPLACE RAIN SENSOR Click here

  4. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. for LHD:


      1. Disconnect the 4A instrument panel junction block assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        S13-4 (SIG) - 4A-50 Always Below 1 Ω
        S13-4 (SIG) or 4A-50 - Body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the 4A instrument panel junction block assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        S14-4 (SIG) - 4A-50 Always Below 1 Ω
        S14-4 (SIG) or 4A-50 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR