LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2321

DTC Code DTC Name
B2321 Driver Side Door ECU Communication Stop

DESCRIPTION

  • *1: for LHD

  • *2: for RHD

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2321

Driver Side Door ECU Communication Stop

No communication between the front power window regulator motor assembly (driver side) and 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 (multiplex network body ECU)

  • Harness or connector

  • Instrument panel junction block assembly

WIRING DIAGRAM

B339323E48

CAUTION / NOTICE / HINT

Note:

  • When using the GTS with the power switch off to troubleshoot:

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

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

  • When the front power window regulator motor assembly (driver side) is removed and reinstalled or replaced, the front power window regulator motor assembly (driver side) must be initialized.

    Click here

  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

Tip:

When DTC B2321 and B2325 are output simultaneously, perform troubleshooting for DTC B2325 first.

Click here

PROCEDURE

  1. CLEAR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Main Body > Clear DTCs

    Result

    Result

    NEXT
    NEXT

  2. CHECK FOR DTC

    1. Check for DTCs.

      Click here

      Body Electrical > Main Body > Trouble Codes

    Result

    Proceed to

    DTC B2321 is output

    DTC B2321 is not output
    DTC B2321 is not output

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    DTC B2321 is output

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY)

    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

    2. Disconnect the J3 front power window regulator motor assembly LH*1 or I3 front power window regulator motor assembly RH*2 connector.

      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance

      Table 1. for LHD

      Tester Connection

      Condition

      Specified Condition

      A-16 (LIN2) - J3-9 (LIN)

      Always

      Below 1 Ω

      A-16 (LIN2) - Body ground

      Always

      10 kΩ or higher
      Table 2. for RHD

      Tester Connection

      Condition

      Specified Condition

      A-16 (LIN2) - I3-9 (LIN)

      Always

      Below 1 Ω

      A-16 (LIN2) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY)Click here

    OK

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

    B301170C03

    *A

    for LHD

    *B

    for RHD

    *a

    Front view of wire harness connector

    (to Front Power Window Regulator Motor Assembly)

    1. Disconnect the J3 front power window regulator motor assembly LH*1 or I3 front power window regulator motor assembly RH*2 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

      J3-1 (GND) - Body ground

      Always

      Below 1 Ω

      for RHD

      Tester Connection

      Condition

      Specified Condition

      I3-1 (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

      Switch Condition

      Specified Condition

      J3-2 (B) - Body ground

      Power switch off

      11 to 14 V

      for RHD

      Tester Connection

      Switch Condition

      Specified Condition

      I3-2 (B) - Body ground

      Power switch off

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY

    1. for LHD

      1. Temporarily replace the front power window regulator motor assembly LH with a new or normally functioning one.

    2. for RHD

      1. Temporarily replace the front power window regulator motor assembly RH with a new or normally functioning one.

    3. Clear the DTCs.

      Click here

      Body Electrical > Main Body > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

  6. CHECK FOR DTC

    1. Check for DTCs.

      Click here

      Body Electrical > Main Body > Trouble Codes

    Result

    Proceed to

    DTC B2321 is not output

    DTC B2321 is output (for LHD)

    DTC B2321 is output (for RHD)
    DTC B2321 is not output

    END (FRONT POWER WINDOW REGULATOR MOTOR IS DEFECTIVE)

    DTC B2321 is output (for LHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

    DTC B2321 is output (for RHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

  7. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY)

    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

    2. Disconnect the J3 front power window regulator motor assembly LH*1 or I3 front power window regulator motor assembly RH*2 connector.

      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance

      Table 3. for LHD

      Tester Connection

      Condition

      Specified Condition

      3D-54 - J3-9 (LIN)

      Always

      Below 1 Ω

      3D-54 - Body ground

      Always

      10 kΩ or higher
      Table 4. for RHD

      Tester Connection

      Condition

      Specified Condition

      3D-54 - I3-9 (LIN)

      Always

      Below 1 Ω

      3D-54 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK (for LHD)

    OK (for RHD)

    NG
    OK (for LHD)

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    Click here

    OK (for RHD)

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR