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 door)

  • Power window regulator motor assembly (for front passenger door)

  • Power window regulator motor assembly (for rear RH door)*1

  • Power window regulator motor assembly (for rear LH door)*1

  • Multiplex network master switch assembly

  • Sliding roof ECU (sliding roof drive gear sub-assembly)*2

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Wire harness or connector

WIRING DIAGRAM

B000MKKE17
B000NFGE04

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 a power window regulator motor assembly is replaced or removed and reinstalled, it requires initialization.


    • w/ Jam Protection Function on 4 Windows: Click here

      w/ Jam Protection Function on Front Door Windows: Click here

  • When using the intelligent tester to troubleshoot with the ignition switch off:

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

PROCEDURE


  1. CONFIRM MODEL


    1. Choose the model to be inspected.

      Result
      Result Proceed to
      for Models with Jam Protection Function on 4 Windows A
      for Models with Jam Protection Function on Front Door Windows B

    B

    CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER DOOR) - POWER WINDOW REGULATOR MASTER SWITCH) Click here

    A

  2. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR (DRIVER DOOR) - MASTER SWITCH)


    1. Disconnect the K3*1 or J3*2 multiplex network master switch assembly connector.

    2. Disconnect the K9*1 or J9*2 power window regulator motor assembly (for driver door) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      K3-16 (LIN2) - K9-9 (LIN)*1

      J3-16 (LIN2) - J9-9 (LIN)*2

      		 Always Below 1 Ω

      K3-16 (LIN2) - Body ground*1

      J3-16 (LIN2) - Body ground*2

      		 Always 10 kΩ or higher

      • *1: for LHD

      • *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. B000JR5E07
      Text in Illustration
      *a

      Component without harness connected

      (Multiplex Network Master Switch Assembly)

      Remove the multiplex network master switch assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      16 (LIN2) - 17 (LIN1) Always Below 1 Ω
      16 (LIN2) - Body ground Always 10 kΩ or higher

    NG

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


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

      B000KSIE01

    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
      3C-26 (LIN2) - MB-16 (LIN2) Always Below 1 Ω
      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)
      *c

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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


    1. Disconnect the J9*1, K9*2, S4*3, L2 and M2 connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3C-26 (LIN2) - M2-9 (LIN) Always Below 1 Ω
      3B-30 (LIN2) - L2-9 (LIN) Always Below 1 Ω

      3B-30 (LIN2) - K3-17 (LIN1)*1

      3B-30 (LIN2) - J3-17 (LIN1)*2

      		 Always Below 1 Ω

      3B-30 (LIN2) - J9-9 (LIN)*1

      3B-30 (LIN2) - K9-9 (LIN)*2

      		 Always Below 1 Ω
      3B-30 (LIN2) - S4-11 (MPX1)*3 Always Below 1 Ω
      3C-26 (LIN2) - Body ground Always 10 kΩ or higher
      3B-30 (LIN2) - Body ground Always 10 kΩ or higher

      • *1: for LHD

      • *2: for RHD

      • *3: w/ Sliding Roof System


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR LH DOOR))


    1. Reconnect the K3*1, J3*2, 3B, 3C, S4*3, L2, K9*1, J9*2, J9*1 and K9*2 connectors.

    2. Clear the DTC Click here.

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

    4. Check for DTCs again.


      • *1: for LHD

      • *2: for RHD

      • *3: w/ Sliding Roof System

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

    B

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR LH DOOR) Click here

    A

  7. CHECK DTC OUTPUT (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)


    1. Reconnect the M2 connector.

    2. Disconnect the K3*1 or J3*2 connector.

    3. Clear the DTC Click here.

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

    5. Check for DTCs again.


      • *1: for LHD

      • *2: for RHD

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

    B

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    A

  8. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR RH DOOR))


    1. Reconnect the K3*1 or J3*2 connector.

    2. Disconnect the L2 connector.

    3. Clear the DTC Click here.

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

    5. Check for DTCs again.


      • *1: for LHD

      • *2: for RHD

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

    B

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR RH DOOR) Click here

    A

  9. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER DOOR))


    1. Reconnect the L2 connector.

    2. Disconnect the K9*1 or J9*2 connector.

    3. Clear the DTC Click here.

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

    5. Check for DTCs again.


      • *1: for LHD

      • *2: for RHD

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

    B

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER DOOR) Click here

    A

  10. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR FRONT PASSENGER DOOR))


    1. Reconnect the K9*1 or J9*2 connector.

    2. Disconnect the J9*1 or K9*2 connector.

    3. Clear the DTC Click here.

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

    5. Check for DTCs again.


      • *1: for LHD

      • *2: for RHD

      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 FRONT PASSENGER DOOR) Click here

    A

  11. CHECK DTC OUTPUT (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY))


    1. Reconnect the J9*1 or K9*2 connector.

    2. Disconnect the S4 connector.

    3. Clear the DTC Click here.

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

    5. Check for DTCs again.


      • *1: for LHD

      • *2: for RHD

      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

  12. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER DOOR) - POWER WINDOW REGULATOR MASTER SWITCH)


    1. Disconnect the K15 power window regulator master switch assembly connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K15-7 (LIN2) - K9-9 (LIN) Always Below 1 Ω
      K15-7 (LIN2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY


    1. B000IY1E42
      Text in Illustration
      *a

      Component without harness connected

      (Power Window Regulator Master Switch Assembly)

      Remove the power window regulator master switch assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      7 (LIN2) - 6 (LIN1) Always Below 1 Ω
      7 (LIN2) or 6 (LIN1) - Body ground Always 10 kΩ or higher

    NG

    REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY Click here

    OK

  14. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


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

      B000LXKE05

    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)

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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


    1. Disconnect the S4* and J9 connectors.

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-30 (LIN2) - K15-6 (LIN1) Always Below 1 Ω
      3B-30 (LIN2) - J9-9 (LIN) Always Below 1 Ω
      3B-30 (LIN2) - S4-11 (MPX1)* Always Below 1 Ω
      3B-30 (LIN2) - Body ground Always 10 kΩ or higher

      • *: w/ Sliding Roof System


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  16. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY)


    1. Reconnect K9, J9, S4*, 3B and MB connectors.

    2. Clear the DTC Click here.

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

    4. Check for DTCs again.

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

      • *: w/ Sliding Roof System


    NG

    REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY Click here

    OK

  17. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER DOOR))


    1. Reconnect the K15 power window regulator master switch assembly connector.

    2. Disconnect the K9 power window regulator motor assembly (for driver door) 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

    NG

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER DOOR) Click here

    OK

  18. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR (FOR FRONT PASSENGER DOOR))


    1. Reconnect the K9 power window regulator motor assembly (for Driver Door) connector.

    2. Disconnect the J9 power window regulator motor assembly (for front passenger door) 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 (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 FRONT PASSENGER DOOR) Click here

    A

  19. CHECK DTC OUTPUT (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY))


    1. Reconnect the J9 power window regulator motor assembly (for front passenger door) 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

    NG

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

    OK

    REPLACE MULTIPLEX NETWORK BODY ECU