LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2325

DTC Code DTC Name
B2325 LIN Communication Bus Malfunction

DESCRIPTION

The main body ECU (multiplex network body ECU) monitors communication between all the ECUs connected to the door bus lines. When the main body ECU (multiplex network body ECU) detects errors in communication with all the ECUs connected to the door bus lines at 2.6-second intervals and 3 times in a row, DTC B2325 will be stored.

DTC No. DTC Detection Condition Trouble Area
B2325 Main body ECU (multiplex network body ECU) detects errors in communication with the ECUs connected to the door bus lines 3 times in a row.

  • Power window regulator motor assembly (for driver side)

  • Sliding roof ECU (sliding roof drive gear sub-assembly)*

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Wire harness or connector

WIRING DIAGRAM

A01HTJ4E10

INSPECTION PROCEDURE

Note


  • When the sliding roof ECU (sliding roof drive gear sub-assembly) is replaced or removed and reinstalled, it requires initialization Click here.

  • When the power window regulator motor assembly (for driver side) is replaced or removed and reinstalled, it requires initialization Click here.

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

    Connect the Techstream to the DLC3, and turn the courtesy switch on and off at 1.5-second intervals until communication between the Techstream and vehicle begins.


  • *: w/ Sliding Roof System

PROCEDURE


  1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly Click here.

      A01HTABE01

    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.

      Tech Tips

      This inspection is to check the LIN 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
      Tester Connection Condition Specified Condition
      3B-30 (LIN2) - MB-16 (LIN2) Always Below 1 Ω
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 *b

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

    4. Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.

    5. Install the instrument panel junction block assembly Click here.


    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - EACH ECU)


    1. Disconnect the S4 sliding roof ECU (sliding roof drive gear sub-assembly) connector*.

    2. Disconnect the K9 power window regulator motor (for driver side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-30 (LIN2) - K9-9 (LIN) Always Below 1 Ω
      3B-30 (LIN2) - S4-11 (MPX1)* Always Below 1 Ω
      K9-9 (LIN) - Body ground Always 10 kΩ or higher
      S4-11 (MPX1)* - Body ground Always 10 kΩ or higher

      • *: w/ Sliding Roof System


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for DRIVER SIDE))


    1. Reconnect the 3B instrument panel junction block assembly connector.

    2. Reconnect the S4 sliding roof ECU (sliding roof drive gear sub-assembly) connector*.

    3. Clear the DTC Click here.

    4. After 10 seconds have elapsed, check if the trouble occurs again.

    5. Check for DTCs again.


      • *: w/ Sliding Roof System

      Result
      Result Proceed to
      DTC B2325 is output (w/ Sliding Roof System) A
      DTC B2325 is output (w/o Sliding Roof System) B
      DTC B2325 is not output C

    B

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

    C

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for DRIVER SIDE) Click here

    A

  4. CHECK DTC OUTPUT (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY))


    1. Reconnect the K9 power window regulator motor (for driver side) connector.

    2. Disconnect the S4 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

    3. Clear the DTC Click here.

    4. After 10 seconds have elapsed, check if the trouble occurs again.

    5. Check for DTCs again.

      Result
      Result Proceed to
      DTC B2325 is output A
      DTC B2325 is not output B

    B

    REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) Click here

    A

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