LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2323

DTC Code DTC Name
B2323 Rear Door RH ECU Communication Stop

DESCRIPTION

This DTC is stored when LIN communication between the rear door window regulator assembly (for RH door) and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2323

Rear Door RH ECU Communication Stop

No communication between rear door window regulator assembly (for RH door) and main body ECU (multiplex network body ECU) for 10 seconds or more.

  • Rear door window regulator assembly (for RH door)

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Wire harness or connector

  • DOOR R/R fuse

WIRING DIAGRAM

  1. for LHD

    B315277E38

  2. for RHD

    B315277E39

CAUTION / NOTICE / HINT

Note:

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

  • When a rear door window regulator assembly is replaced or removed and reinstalled, it requires initialization.

    for Models with Jam Protection Function on 4 Windows:Click here

    for Models with Jam Protection Function on Driver Door Window Only:Click here

PROCEDURE

  1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. Remove the instrument panel junction block assembly.

      for LHD:Click hereClick here

      for RHD:Click hereClick here

      B281983C12

      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      -

      -

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

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

      Tip:

      This inspection is to check the LIN communication line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).

      Standard Resistance

      Table 1. for LHD:

      Tester Connection

      Condition

      Specified Condition

      3E-14 - MB-16 (LIN2)

      Always

      Below 1 Ω
      Table 2. for RHD:

      Tester Connection

      Condition

      Specified Condition

      3E-14 - MB-16 (LIN2)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    for LHD:Click hereClick here

    for RHD:Click hereClick here

    OK

  2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - REAR DOOR WINDOW REGULATOR ASSEMBLY (for RH Door))

    1. for LHD

      1. Disconnect the J3 rear door window regulator assembly (for RH door) connector.

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

        Standard Resistance

        Tester Connection

        Condition

        Specified Condition

        3E-14 - J3-9 (LIN)

        Always

        Below 1 Ω

        J3-9 (LIN) - Body ground

        Always

        10 kΩ or higher

        3E-14 - Body ground

        Always

        10 kΩ or higher

    2. for RHD

      1. Disconnect the J3 rear door window regulator assembly (for RH door) connector.

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

        Standard Resistance

        Tester Connection

        Condition

        Specified Condition

        3E-14 - J3-9 (LIN)

        Always

        Below 1 Ω

        J3-9 (LIN) - Body ground

        Always

        10 kΩ or higher

        3E-14 - Body ground

        Always

        10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (REAR DOOR WINDOW REGULATOR ASSEMBLY (for RH Door) - BATTERY, BODY GROUND)

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      J3-2 (B) - J3-1 (GND)

      Always

      11 to 14 V

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      J3-1 (GND) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE REAR DOOR WINDOW REGULATOR ASSEMBLY (for RH Door)

    1. Replace the rear door window regulator assembly (for RH door).

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  5. CHECK DTC OUTPUT

    1. Clear the DTCs.

      Click here

      Body Electrical > Main Body > Clear DTCs

    2. Recheck for DTCs.

      Body Electrical > Main Body > Trouble Codes

      OK

      DTC B2323 is not output.

    Result

    Proceed to

    OK

    NG
    OK

    END (REAR DOOR WINDOW REGULATOR ASSEMBLY (for RH Door) WAS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:Click hereClick here

    for RHD:Click hereClick here