WIPER AND WASHER SYSTEM, Diagnostic DTC:B1245

DTC Code DTC Name
B1245 Lost Communication with Wiper ECU LIN

DESCRIPTION

The main body ECU (multiplex network body ECU) and front wiper motor and link assembly communicate via LIN communication. The main body ECU (multiplex network body ECU) stores this DTC if communication becomes abnormal.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory DTC Output from
B1245 Lost Communication with Wiper ECU LIN When the battery voltage is 9.5 V or more, a communication malfunction between the main body ECU (multiplex network body ECU) and front wiper motor and link assembly is detected for 10 seconds or more.

  • Front wiper motor and link assembly

  • Harness or connector

  • Main body ECU (multiplex network body ECU)

 ○ Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

B007ZMUE03

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Turn the engine switch on (IG).

    2. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Result Proceed to
      DTC B1245 is not output. A
      DTC B1245 is output. B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - FRONT WIPER MOTOR AND LINK ASSEMBLY)


    1. Disconnect the J9 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the i1 front wiper motor and link assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J9-8 (LIN3) - i1-2 (MPX1) Always Below 1 Ω
      J9-8 (LIN3) or i1-2 (MPX1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    CHECK WIPER MOTOR WIRE Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (FRONT WIPER MOTOR AND LINK ASSEMBLY - POWER SOURCE)


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      i1-3 (L) - Body ground Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK WIPER MOTOR WIRE Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (FRONT WIPER MOTOR AND LINK ASSEMBLY - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      i1-4 (+S) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    CHECK WIPER MOTOR WIRE Click here

    OK

  6. REPLACE FRONT WIPER MOTOR AND LINK ASSEMBLY


    1. Replace the front wiper motor and link assembly with a new or known good one.

      Click here

    2. Turn the engine switch on (IG).

    3. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Result Proceed to
      DTC B1245 is not output. A
      DTC B1245 is output. B

    A

    END

    B

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  7. CHECK WIPER MOTOR WIRE


    1. Remove the wiper motor wire.

      Click here

    2. B007WY4C23
      *a

      Front view of wire harness connector

      (to Front Wiper Motor and Link Assembly)
      *b

      Front view of wire harness connector

      (to Wire Harness)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      i1-4 (+S) - iA1-3 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE WIPER MOTOR WIRE Click here

  8. CHECK WIPER MOTOR WIRE


    1. Remove the wiper motor wire.

      Click here

    2. B007WY4C24
      *a

      Front view of wire harness connector

      (to Front Wiper Motor and Link Assembly)
      *b

      Front view of wire harness connector

      (to Wire Harness)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      i1-3 (L) - iA1-2 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE WIPER MOTOR WIRE Click here

  9. CHECK WIPER MOTOR WIRE


    1. Remove the wiper motor wire.

      Click here

    2. B007WY4C25
      *a

      Front view of wire harness connector

      (to Front Wiper Motor and Link Assembly)
      *b

      Front view of wire harness connector

      (to Wire Harness)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      i1-2 (MPX1) - iA1-1 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE WIPER MOTOR WIRE Click here