LIN COMMUNICATION SYSTEM Rain Sensor LIN Communication Malfunction

DESCRIPTION

The LIN communication of the components related to the rain sensor occurs between the rain sensor and front controller.

WIRING DIAGRAM

A01H26NE12

INSPECTION PROCEDURE

Note


  • When using the intelligent tester with the power switch off to troubleshoot:

    Connect the intelligent tester to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the tester and vehicle begins.

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

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (LIN COMMUNICATION)


    1. Using the intelligent tester, read the "Data List".

      BODY No.5 (Front Controller):
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      LIN COM Status of LIN communication / Without or With

      Without: No connection

      With: Connection

      		 -
      CURR COMM RAIN Current communication with rain sensor / OK or Stop

      OK: Connection

      Stop: No connection

      		 -
      OK
      Tester displays "With" or "OK".

    NG

    CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - RAIN SENSOR) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - RAIN SENSOR)

    A01GWXWE04

    1. Disconnect the A50 controller connector.

    2. Disconnect the X8 or X16 sensor connector.

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


      1. w/o Full-speed following function

        Standard resistance
        Tester Connection Condition Specified Condition
        A50-9 (LIN) - X8-3 (MPX) Always Below 1 Ω
        A50-9 (LIN) or X8-3 (MPX) - Body ground Always 10 kΩ or higher
        Standard voltage
        Tester Connection Switch Condition Specified Condition
        A50-9 (LIN) or X8-3 (MPX) - Body ground Power switch on (IG) Below 1 V

      2. w/ Full-speed following function

        Standard resistance
        Tester Connection Condition Specified Condition
        A50-9 (LIN) - X16-3 (MPX) Always Below 1 Ω
        A50-9 (LIN) or X16-3 (MPX) - Body ground Always 10 kΩ or higher
        Standard voltage
        Tester Connection Switch Condition Specified Condition
        A50-9 (LIN) or X16-3 (MPX) - Body ground Power switch on (IG) Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01GYMEE01

      Disconnect the X8 or X16 sensor connector.

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


      1. w/o Full-speed following function

        Standard resistance
        Tester Connection Condition Specified Condition
        X8-1 (ES) - Body ground Always Below 1 Ω
        Standard voltage
        Tester Connection Switch Condition Specified Condition
        X8-4 (SIG) - Body ground Power switch off Below 1 V
        X8-4 (SIG) - Body ground Power switch on (IG) 11 to 14 V

      2. w/ Full-speed following function

        Standard resistance
        Tester Connection Condition Specified Condition
        X16-1 (ES) - Body ground Always Below 1 Ω
        Standard voltage
        Tester Connection Switch Condition Specified Condition
        X16-4 (SIG) - Body ground Power switch off Below 1 V
        X16-4 (SIG) - Body ground Power switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK RAIN SENSOR (OPERATION)


    1. Temporarily replace the rain sensor with a new or normally functioning one Click here.


    NEXT

  5. READ VALUE USING INTELLIGENT TESTER (LIN COMMUNICATION)


    1. Using the intelligent tester, read the "Data List".

      BODY No.5 (Front Controller):
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      LIN COM Status of LIN communication / Without or With

      Without: No connection

      With: Connection

      		 -
      CURR COMM RAIN Current communication with rain sensor / OK or STOP

      OK: Connection

      Stop: No connection

      		 -
      OK
      Tester displays "With" or "OK".

    NG

    REPLACE MULTIPLEX NETWORK FRONT LIGHT ECU (FRONT CONTROLLER)

    OK

    END (RAIN SENSOR IS DEFECTIVE)