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. Detection Item DTC Detection Condition Trouble Area
B2325 LIN Communication Bus Malfunction 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 master switch assembly

  • 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

  • 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

  • A/C fuse

  • P/W F/L fuse

  • P/W F/R fuse

  • P/W R/L fuse*1

  • P/W R/R fuse*1

  • S/ROOF fuse*2

WIRING DIAGRAM


  1. for LHD

    A018MFTE10
    A018I04E02

  2. for RHD

    A018KC5E02
    A018I04E03

CAUTION / NOTICE / HINT

Note


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

    Click here

  • When the sliding roof ECU (sliding roof drive gear sub-assembly) is replaced or removed and reinstalled, it requires initialization (w/ Sliding Roof System).

    Click here

  • Before performing the inspection, check that DTC B1206, B1273, B2321, B2322, B2323 or B2324 is not output.

    Click here

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.*


    • *: Smart Entry and Start System

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*

    Click here


    • *: for LHD

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 2 Windows B

    B

    INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY Click here

    A

  2. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY


    1. A018KT8C01
      *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
      16 (LIN2) - 17 (LIN1) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door))


    1. for LHD


      1. Disconnect the I4 power window regulator motor assembly (for driver door) connector.

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

        Note

        Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.

        Standard Resistance
        Tester Connection Condition Specified Condition
        I7-16 (LIN2) - I4-9 (LIN) Ignition switch off Below 1 Ω
        I7-16 (LIN2) or I4-9 (LIN) - Body ground Ignition switch off 10 kΩ or higher

    2. for RHD


      1. Disconnect the H4 power window regulator motor assembly (for driver door) connector.

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

        Note

        Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.

        Standard Resistance
        Tester Connection Condition Specified Condition
        H7-16 (LIN2) - H4-9 (LIN) Ignition switch off Below 1 Ω
        H7-16 (LIN2) or H4-9 (LIN) - Body ground Ignition switch off 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

      Click here

      A018K3FC01
      *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.

      Tech Tips

      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
      Tester Connection Condition Specified Condition
      4D-25 - MB-16 (LIN2) Always Below 1 Ω
      4H-35 - MB-16 (LIN2) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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


    1. for LHD


      1. Disconnect the H5 power window regulator motor assembly (for front passenger door) connector.

      2. Disconnect the K2 power window regulator motor assembly (for rear LH door) connector.

      3. Disconnect the J2 power window regulator motor assembly (for rear RH door) connector.

      4. Disconnect the I7 power window regulator master switch assembly connector.

      5. Disconnect the S5 sliding roof ECU (sliding roof drive gear sub-assembly) connector.*


        • *: w/ Sliding Roof System

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

        Note

        Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.

        Standard Resistance
        Tester Connection Condition Specified Condition
        4D-25 - I7-17 (LIN1) Ignition switch off Below 1 Ω
        4D-25 - S5-11 (MPX1)* Ignition switch off Below 1 Ω
        4D-25 - H5-9 (LIN) Ignition switch off Below 1 Ω
        4D-25 - J2-9 (LIN) Ignition switch off Below 1 Ω
        4H-35 - K2-9 (LIN) Ignition switch off Below 1 Ω
        I7-17 (LIN1) - Body ground Ignition switch off 10 kΩ or higher
        S5-11 (MPX1) - Body ground* Ignition switch off 10 kΩ or higher
        4D-25 - Body ground Ignition switch off 10 kΩ or higher
        4H-35 - Body ground Ignition switch off 10 kΩ or higher
        H5-9 (LIN) - Body ground Ignition switch off 10 kΩ or higher
        J2-9 (LIN) - Body ground Ignition switch off 10 kΩ or higher
        K2-9 (LIN) - Body ground Ignition switch off 10 kΩ or higher

        • *: w/ Sliding Roof System

    2. for RHD


      1. Disconnect the I5 power window regulator motor assembly (for front passenger door) connector.

      2. Disconnect the K2 power window regulator motor assembly (for rear LH door) connector.

      3. Disconnect the J2 power window regulator motor assembly (for rear RH door) connector.

      4. Disconnect the H7 power window regulator master switch assembly connector.

      5. Disconnect the S5 sliding roof ECU (sliding roof drive gear sub-assembly) connector.*


        • *: w/ Sliding Roof System

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

        Note

        Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.

        Standard Resistance
        Tester Connection Condition Specified Condition
        4D-25 - H7-17 (LIN1) Ignition switch off Below 1 Ω
        4D-25 - S5-11 (MPX1)* Ignition switch off Below 1 Ω
        4D-25 - J2-9 (LIN) Ignition switch off Below 1 Ω
        4D-25 - I5-9 (LIN) Ignition switch off Below 1 Ω
        4H-35 - K2-9 (LIN) Ignition switch off Below 1 Ω
        H7-17 (LIN1) - Body ground Ignition switch off 10 kΩ or higher
        S5-11 (MPX1) - Body ground* Ignition switch off 10 kΩ or higher
        4D-25 - Body ground Ignition switch off 10 kΩ or higher
        4H-35 - Body ground Ignition switch off 10 kΩ or higher
        J2-9 (LIN) - Body ground Ignition switch off 10 kΩ or higher
        I5-9 (LIN) - Body ground Ignition switch off 10 kΩ or higher
        K2-9 (LIN) - Body ground Ignition switch off 10 kΩ or higher

        • *: w/ Sliding Roof System

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door)


    1. for LHD


      1. Reconnect the 4D and 4H instrument panel junction block assembly connectors.

      2. Reconnect the I4 power window regulator motor assembly (for driver door) connector.

      3. Reconnect the H5 power window regulator motor assembly (for front passenger door) connector.

      4. Reconnect the J2 power window regulator motor assembly (for rear RH door) connector.

      5. Reconnect the I7 power window regulator master switch assembly connector.

      6. Reconnect the S5 sliding roof ECU (sliding roof drive gear sub-assembly) connector.*


        • *: w/ Sliding Roof System

      7. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      8. After 10 seconds have elapsed, check if the same DTC is output again.


        Body Electrical > Main Body > Trouble Codes

    2. for RHD


      1. Reconnect the 4D and 4H instrument panel junction block assembly connectors.

      2. Reconnect the H4 power window regulator motor assembly (for driver door) connector.

      3. Reconnect the I5 power window regulator motor assembly (for front passenger door) connector.

      4. Reconnect the J2 power window regulator motor assembly (for rear RH door) connector.

      5. Reconnect the H7 power window regulator master switch assembly connector.

      6. Reconnect the S5 sliding roof ECU (sliding roof drive gear sub-assembly) connector.*


        • *: w/ Sliding Roof System

      7. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      8. After 10 seconds have elapsed, check if the same DTC is output again.


        Body Electrical > Main Body > Trouble Codes
      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 POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY


    1. for LHD


      1. Reconnect the K2 power window regulator motor assembly (for rear LH door) connector.

      2. Disconnect the I7 power window regulator master switch assembly connector.

      3. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      4. After 10 seconds have elapsed, check if the same DTC is output again.


        Body Electrical > Main Body > Trouble Codes

    2. for RHD


      1. Reconnect the K2 power window regulator motor assembly (for rear LH door) connector.

      2. Disconnect the H7 power window regulator master switch assembly connector.

      3. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      4. After 10 seconds have elapsed, check if the same DTC is output again.


        Body Electrical > Main Body > Trouble Codes
      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

  8. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door)


    1. for LHD


      1. Reconnect the I7 power window regulator master switch assembly connector.

      2. Disconnect the J2 power window regulator motor assembly (for rear RH door) connector.

      3. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      4. After 10 seconds have elapsed, check if the same DTC is output again.


        Body Electrical > Main Body > Trouble Codes

    2. for RHD


      1. Reconnect the H7 power window regulator master switch assembly connector.

      2. Disconnect the J2 power window regulator motor assembly (for rear RH door) connector.

      3. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      4. After 10 seconds have elapsed, check if the same DTC is output again.


        Body Electrical > Main Body > Trouble Codes
      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 POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door)


    1. for LHD


      1. Reconnect the J2 power window regulator motor assembly (for rear RH door) connector.

      2. Disconnect the I4 power window regulator motor assembly (for driver door) connector.

      3. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      4. After 10 seconds have elapsed, check if the same DTC is output again.


        Body Electrical > Main Body > Trouble Codes

    2. for RHD


      1. Reconnect the J2 power window regulator motor assembly (for rear RH door) connector.

      2. Disconnect the H4 power window regulator motor assembly (for driver door) connector.

      3. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      4. After 10 seconds have elapsed, check if the same DTC is output again.


        Body Electrical > Main Body > Trouble Codes
      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 POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door)


    1. for LHD


      1. Reconnect the I4 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the H5 power window regulator motor assembly (for front passenger door) connector.

      3. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      4. After 10 seconds have elapsed, check if the same DTC is output again.


        Body Electrical > Main Body > Trouble Codes

    2. for RHD


      1. Reconnect the H4 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the I5 power window regulator motor assembly (for front passenger door) connector.

      3. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      4. After 10 seconds have elapsed, check if the same DTC is output again.


        Body Electrical > Main Body > Trouble Codes
      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 SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)


    1. for LHD


      1. Reconnect the H5 power window regulator motor assembly (for front passenger door) connector.

      2. Disconnect the S5 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

      3. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      4. After 10 seconds have elapsed, check if the same DTC is output again.


        Body Electrical > Main Body > Trouble Codes

    2. for RHD


      1. Reconnect the I5 power window regulator motor assembly (for front passenger door) connector.

      2. Disconnect the S5 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

      3. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      4. After 10 seconds have elapsed, check if the same DTC is output again.


        Body Electrical > Main Body > Trouble Codes
      Result
      Result Proceed to
      DTC B2325 is output A
      DTC B2325 is not output B

    A

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

    B

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

  12. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY


    1. A018KE0C02
      *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
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY Click here

    OK

  13. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door))


    1. Disconnect the H4 power window regulator motor assembly (for driver door) connector.

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

      Note

      Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H6-7 (LIN2) - H4-9 (LIN) Ignition switch off Below 1 Ω
      H6-7 (LIN2) or H4-9 (LIN) - Body ground Ignition switch off 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

      Click here

      A018M9SC13
      *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.

      Tech Tips

      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
      Tester Connection Condition Specified Condition
      4D-25 - MB-16 (LIN2) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    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 I5 power window regulator motor assembly (for front passenger door) connector.

    2. Disconnect the H6 power window regulator master switch assembly connector.

    3. Disconnect the S5 sliding roof ECU (sliding roof drive gear sub-assembly) connector.*


      • *: w/ Sliding Roof System

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

      Note

      Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.

      Standard Resistance
      Tester Connection Condition Specified Condition
      4D-25 - H6-6 (LIN1) Ignition switch off Below 1 Ω
      4D-25 - S5-11 (MPX1)* Ignition switch off Below 1 Ω
      4D-25 - I5-9 (LIN) Ignition switch off Below 1 Ω
      H6-6 (LIN1) - Body ground Ignition switch off 10 kΩ or higher
      S5-11 (MPX1) - Body ground* Ignition switch off 10 kΩ or higher
      4D-25 - Body ground Ignition switch off 10 kΩ or higher
      I5-9 (LIN) - Body ground Ignition switch off 10 kΩ or higher

      • *: w/ Sliding Roof System

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  16. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY


    1. Reconnect the 4D instrument panel junction block assembly connector.

    2. Reconnect the H4 power window regulator motor assembly (for driver door) connector.

    3. Reconnect the I5 power window regulator motor assembly (for front passenger door) connector.

    4. Reconnect the S5 sliding roof ECU (sliding roof drive gear sub-assembly) connector.*


      • *: w/ Sliding Roof System

    5. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    6. After 10 seconds have elapsed, check if the same DTC is output again.


      Body Electrical > Main Body > Trouble Codes
      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

  17. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door)


    1. Reconnect the H6 power window regulator master switch assembly connector.

    2. Disconnect the H4 power window regulator motor assembly (for driver door) connector.

    3. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    4. After 10 seconds have elapsed, check if the same DTC is output again.


      Body Electrical > Main Body > Trouble Codes
      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

  18. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door)


    1. Reconnect the H4 power window regulator motor assembly (for driver door) connector.

    2. Disconnect the I5 power window regulator motor assembly (for front passenger door) connector.

    3. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    4. After 10 seconds have elapsed, check if the same DTC is output again.


      Body Electrical > Main Body > Trouble Codes
      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 SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)


    1. Reconnect the I5 power window regulator motor assembly (for front passenger door) connector.

    2. Disconnect the S5 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

    3. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    4. After 10 seconds have elapsed, check if the same DTC is output again.


      Body Electrical > Main Body > Trouble Codes
      Result
      Result Proceed to
      DTC B2325 is output A
      DTC B2325 is not output B

    A

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

    B

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