LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2325

DTC Code DTC Name
B2325 LIN Communication Bus Malfunction

DESCRIPTION

The main body ECU (instrument panel junction block assembly) intermittently monitors the LIN communication bus between the components related to the doors, double lock door control relay*2 and sliding roof drive gear*1. DTC B2325 is stored when a malfunction in the LIN communication bus between the components related to the doors, double lock door control relay*2 and sliding roof drive gear*1 is detected consecutively 3 times.


DTC Code DTC Detection Condition Trouble Area
B2325 The main body ECU (instrument panel junction block assembly) detects a malfunction in the LIN communication bus between components related to the doors, double lock door control relay*2 and sliding roof drive gear*1 consecutively 3 times.

  • Power window regulator master switch assembly

  • Front door window regulator assembly LH

  • Front door window regulator assembly RH

  • Rear door window regulator assembly LH*3

  • Rear door window regulator assembly RH*3

  • Sliding roof drive gear sub-assembly*1

  • Double lock door control relay*2

  • Main body ECU (instrument panel junction block assembly)

  • Harness or connector

WIRING DIAGRAM

A002NBZE03

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.

Tech Tips

When DTC B2325 and a LIN communication stop DTC are output simultaneously, first perform troubleshooting for the LIN communication stop DTC. Then perform troubleshooting for DTC B2325.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

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

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - MASTER SWITCH)


    1. A002N1XE02
      Text in Illustration
      *1 for LHD
      *2 for RHD
      *3

      Front view of wire harness connector

      (to Main Body ECU)
      *4

      Front view of wire harness connector

      (to Master Switch)

      Disconnect the H79 ECU connector.

    2. Disconnect the K5*1 or J5*2 switch connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      H79-23 (LIN2) - K5-17 (LIN1) Always Below 1 Ω
      H79-23 (LIN2) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      H79-23 (LIN2) - J5-17 (LIN1) Always Below 1 Ω
      H79-23 (LIN2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CLEAR DTC


    1. Connect the H79 ECU connector.

    2. Disconnect the K5*1 or J5*2 switch connector.


      • *1: for LHD

      • *2: for RHD

    3. Clear the DTCs Click here.


    NEXT

  5. CHECK FOR DTC


    1. Check for DTCs Click here.

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

    B

    REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY Click here

    A

  6. CLEAR DTC


    • *1: for LHD

    • *2: for RHD


    1. Connect the K5*1 or J5*2 switch connector.

    2. Disconnect the K8*1 or K10*2 regulator connector.

    3. Clear the DTCs Click here.


    NEXT

  7. CHECK FOR DTC


    1. Check for DTCs Click here.

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

    B

    REPLACE FRONT DOOR WINDOW REGULATOR LH Click here

    A

  8. CLEAR DTC


    • *1: for LHD

    • *2: for RHD


    1. Connect the K8*1 or K10*2 regulator connector.

    2. Disconnect the J8*1 or J6*2 regulator connector.

    3. Clear the DTCs Click here.


    NEXT

  9. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B2325 is output (w/ Rear Door Power Window) A
      DTC B2325 is output (w/o Rear Door Power Window, w/ Double Locking System) B
      DTC B2325 is output (w/o Rear Door Power Window, w/o Double Locking System, w/ Roof Sunshade System) C
      DTC B2325 is output (w/o Rear Door Power Window, w/o Double Locking System, w/o Roof Sunshade System) D
      DTC B2325 is not output E

    B

    CLEAR DTC Click here

    C

    CLEAR DTC Click here

    D

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    E

    REPLACE FRONT DOOR WINDOW REGULATOR RH Click here

    A

  10. CLEAR DTC


    1. Connect the J8*1 or J6*2 regulator connector.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the L3 regulator connector.

    3. Clear the DTCs Click here.


    NEXT

  11. CHECK FOR DTC


    1. Check for DTCs Click here.

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

    B

    REPLACE REAR DOOR WINDOW REGULATOR LH Click here

    A

  12. CLEAR DTC


    1. Connect the L3 regulator connector.

    2. Disconnect the M3 regulator connector.

    3. Clear the DTCs Click here.


    NEXT

  13. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B2325 is output (w/ Double Locking System) A
      DTC B2325 is output (w/o Double Locking System, w/ Roof Sunshade System) B
      DTC B2325 is output (w/o Double Locking System, w/o Roof Sunshade System) C
      DTC B2325 is not output D

    B

    CLEAR DTC Click here

    C

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    D

    REPLACE REAR DOOR WINDOW REGULATOR RH Click here

    A

  14. CLEAR DTC


    1. Connect the M3 regulator connector.

    2. Disconnect the H50 relay connector.

    3. Clear the DTCs Click here.


    NEXT

  15. CHECK FOR DTC


    1. Check for DTCs Click here.

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

    A

    CLEAR DTC Click here

    B

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    C

    REPLACE DOUBLE LOCK DOOR CONTROL RELAY Click here

  16. CLEAR DTC


    1. w/ Double Locking System:


      1. Connect the H50 relay connector.

    2. w/o Double Locking System:


      1. Connect the M3 regulator connector.

    3. Disconnect the z3 drive gear connector.

    4. Clear the DTCs Click here.


    NEXT

  17. CHECK FOR DTC


    1. Check for DTCs Click here.

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

    A

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    B

    REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY Click here

  18. CLEAR DTC


    1. Connect the J6 regulator connector.

    2. Disconnect the H50 relay connector.

    3. Clear the DTCs Click here.


    NEXT

  19. CHECK FOR DTC


    1. Check for DTCs Click here.

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

    A

    REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY Click here

    B

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    C

    REPLACE DOUBLE LOCK DOOR CONTROL RELAY Click here

  20. CLEAR DTC


    1. w/ Double Locking System:


      1. Connect the H50 relay connector.

    2. w/o Double Locking System:


      1. Connect the J8*1 or J6*2 regulator connector.


        • *1: for LHD

        • *2: for RHD

    3. Disconnect the z3 drive gear connector.

    4. Clear the DTCs Click here.


    NEXT

  21. CHECK FOR DTC


    1. Check for DTCs Click here.

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

    A

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    B

    REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY Click here