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.

  • *1: w/ Roof Sunshade System

  • *2: w/ Double Locking System

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

  • *1: w/ Roof Sunshade System

  • *2: w/ Double Locking System

  • *3: w/ Rear Door Power Window

WIRING DIAGRAM

E190141E03

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.

Tip:

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).

  2. CHECK FOR DTC

    1. Check for DTCs (Click here).

      Table 1. Result

      Result

      Proceed to

      DTC B2325 is output

      A

      DTC B2325 is not output

      B

    USE SIMULATION METHOD TO CHECK

    (Click here)

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

    1. U123786E02

      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
      Table 2. 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)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  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).

  5. CHECK FOR DTC

    1. Check for DTCs (Click here).

      Table 3. Result

      Result

      Proceed to

      DTC B2325 is output

      A

      DTC B2325 is not output

      B

    REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

    (Click here)

  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).

  7. CHECK FOR DTC

    1. Check for DTCs (Click here).

      Table 4. Result

      Result

      Proceed to

      DTC B2325 is output

      A

      DTC B2325 is not output

      B

    REPLACE FRONT DOOR WINDOW REGULATOR LH

    (Click here)

  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).

  9. CHECK FOR DTC

    1. Check for DTCs (Click here).

      Table 5. 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

    CLEAR DTCClick here

    CLEAR DTCClick here

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    REPLACE FRONT DOOR WINDOW REGULATOR RH

    (Click here)

  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).

  11. CHECK FOR DTC

    1. Check for DTCs (Click here).

      Table 6. Result

      Result

      Proceed to

      DTC B2325 is output

      A

      DTC B2325 is not output

      B

    REPLACE REAR DOOR WINDOW REGULATOR LH

    (Click here)

  12. CLEAR DTC

    1. Connect the L3 regulator connector.

    2. Disconnect the M3 regulator connector.

    3. Clear the DTCs (Click here).

  13. CHECK FOR DTC

    1. Check for DTCs (Click here).

      Table 7. 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

    CLEAR DTCClick here

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    REPLACE REAR DOOR WINDOW REGULATOR RH

    (Click here)

  14. CLEAR DTC

    1. Connect the M3 regulator connector.

    2. Disconnect the H50 relay connector.

    3. Clear the DTCs (Click here).

  15. CHECK FOR DTC

    1. Check for DTCs (Click here).

      Table 8. 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

    CLEAR DTCClick here

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    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).

  17. CHECK FOR DTC

    1. Check for DTCs (Click here).

      Table 9. Result

      Result

      Proceed to

      DTC B2325 is output

      A

      DTC B2325 is not output

      B

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    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).

  19. CHECK FOR DTC

    1. Check for DTCs (Click here).

      Table 10. 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

    REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

    (Click here)

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    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).

  21. CHECK FOR DTC

    1. Check for DTCs (Click here).

      Table 11. Result

      Result

      Proceed to

      DTC B2325 is output

      A

      DTC B2325 is not output

      B

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY

    (Click here)