LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2321

DTC Code DTC Name
B2321 Driver Side Door ECU Communication Stop

DESCRIPTION

This DTC is stored when LIN communication between the front power window regulator motor assembly LH*1 or RH*2 and main body ECU (main body ECU) stops for 10 seconds or more.


DTC Code DTC Detection Condition Trouble Area
B2321 No communication between the front power window regulator motor assembly LH*1 or RH*2 and main body ECU (main body ECU) for 10 seconds or more.

  • Front power window regulator motor assembly LH*1

  • Front power window regulator motor assembly RH*2

  • Main body ECU (main body ECU)

  • Harness or connector

WIRING DIAGRAM

B001GKVE01

CAUTION / NOTICE / HINT

Note


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

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

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

Tech Tips


  • When communication between the front power window regulator motor assembly LH*1 or RH*2 and main body ECU (multiplex network body ECU) stops, DTC B2325 is also stored.

  • When DTC B1206 and B2321 are output simultaneously, perform troubleshooting for DTC B1206 first.


PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC B2321 is not output.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH - FRONT POWER WINDOW REGULATOR MOTOR)


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the K4*1 or J9*2 multiplex network master switch assembly connector.

    2. Disconnect the K7*1 or J7*2 front power window regulator motor assembly connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      K4-16 (LIN2) - K7-9 (LIN) Always Below 1 Ω
      K4-16 (LIN2) or K7-9 (LIN) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      J9-16 (LIN2) - J7-9 (LIN) Always Below 1 Ω
      J9-16 (LIN2) or J7-9 (LIN) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (FRONT POWER WINDOW REGULATOR MOTOR - BATTERY AND BODY GROUND)


    1. B001GZDE02
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Front Power Window Regulator Motor Assembly)

      Disconnect the K7*1 or J7*2 front power window regulator motor assembly connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      K7-1 (GND) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      J7-1 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      for LHD
      Tester Connection Condition Specified Condition
      K7-2 (B) - Body ground Always 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      J7-2 (B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY


    1. Temporarily replace the front power window regulator motor assembly LH*1 or RH*2 with a new or normally functioning one Click here.


      • *1: for LHD

      • *2: for RHD


    NEXT

  6. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  7. CHECK FOR DTC


    1. Check for DTCs Click here.

      OK
      DTC B2321 is not output.

    OK

    END (FRONT POWER WINDOW REGULATOR MOTOR IS DEFECTIVE)

    NG

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