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.

  • Multiplex network 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)

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

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

  • Main body ECU (multiplex network body ECU)

  • Junction block assembly LH

  • Wire harness or connector

  • ECU-ALT NO. 2 fuse

  • DOOR F/L fuse

  • DOOR F/R fuse

  • DOOR R/L fuse

  • DOOR R/R fuse

  • S/ROOF fuse*

WIRING DIAGRAM

B006QWEE08

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • 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 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.

PROCEDURE


  1. INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. B006MSXC04
      *A for LHD
      *B for RHD
      *a

      Component without harness connected

      (Multiplex Network Master Switch Assembly)

      for LHD


      1. 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
        I21-16 (LIN2) - I21-17 (LIN1) Always Below 1 Ω

    2. for RHD


      1. 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
        I5-16 (LIN2) - I5-17 (LIN1) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    OK

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


    1. for LHD


      1. Disconnect the I23 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 engine switch from on (IG) to off and wait for 180 seconds or more without operating any switches.

        Standard Resistance
        Tester Connection Condition Specified Condition
        I21-16 (LIN2) - I23-9 (LIN) Engine switch off Below 1 Ω
        I21-16 (LIN2) or I23-9 (LIN) - Body ground Engine switch off 10 kΩ or higher

    2. for RHD


      1. Disconnect the I7 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 engine switch from on (IG) to off and wait for 180 seconds or more without operating any switches.

        Standard Resistance
        Tester Connection Condition Specified Condition
        I5-16 (LIN2) - I7-9 (LIN) Engine switch off Below 1 Ω
        I5-16 (LIN2) or I7-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT JUNCTION BLOCK ASSEMBLY LH


    1. Remove the junction block assembly LH.

      Click here

      B006QG8C06
      *a

      Component without harness connected

      (Junction Block Assembly LH)

      		 - -

    2. Remove the main body ECU (multiplex network body ECU) from the junction block assembly LH.

    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 junction block assembly LH that connects the wire harness to the built-in main body ECU (multiplex network body ECU).

      Standard Resistance
      Tester Connection Condition Specified Condition
      4D-11 - MB-16 (LIN2) Always Below 1 Ω
      4H-25 - MB-16 (LIN2) Always Below 1 Ω
      4H-26 - MB-16 (LIN2) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE JUNCTION BLOCK ASSEMBLY LH Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (JUNCTION BLOCK ASSEMBLY LH - EACH ECU)


    1. for LHD


      1. Disconnect the I7 power window regulator motor assembly (for front passenger door) connector.

      2. Disconnect the J16 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 S38 sliding roof ECU (sliding roof drive gear assembly) connector.

      5. 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 engine switch from on (IG) to off and wait for 180 seconds or more without operating any switches.

        Standard Resistance
        Tester Connection Condition Specified Condition
        4D-11 - I21-17 (LIN1) Engine switch off Below 1 Ω
        4D-11 - I7-9 (LIN) Engine switch off Below 1 Ω
        4D-11 - J2-9 (LIN) Engine switch off Below 1 Ω
        4H-25 - J16-9 (LIN) Engine switch off Below 1 Ω
        4H-26 - S38-11 (MPX1) Engine switch off Below 1 Ω
        4D-11 - Body ground Engine switch off 10 kΩ or higher
        4H-25 - Body ground Engine switch off 10 kΩ or higher
        4H-26 - Body ground Engine switch off 10 kΩ or higher
        I21-17 (LIN1) - Body ground Engine switch off 10 kΩ or higher
        I7-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
        J2-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
        J16-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
        S38-11 (MPX1) - Body ground Engine switch off 10 kΩ or higher

    2. for RHD


      1. Disconnect the I23 power window regulator motor assembly (for front passenger door) connector.

      2. Disconnect the J16 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 S38 sliding roof ECU (sliding roof drive gear assembly) connector.*


        • *: w/ Sliding Roof System

      5. 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 engine switch from on (IG) to off and wait for 180 seconds or more without operating any switches.

        Standard Resistance
        Tester Connection Condition Specified Condition
        4D-11 - I5-17 (LIN1) Engine switch off Below 1 Ω
        4D-11 - I23-9 (LIN) Engine switch off Below 1 Ω
        4D-11 - J2-9 (LIN) Engine switch off Below 1 Ω
        4H-25 - J16-9 (LIN) Engine switch off Below 1 Ω
        4H-26 - S38-11 (MPX1)* Engine switch off Below 1 Ω
        4D-11 - Body ground Engine switch off 10 kΩ or higher
        4H-25 - Body ground Engine switch off 10 kΩ or higher
        4H-26 - Body ground Engine switch off 10 kΩ or higher
        I5-17 (LIN1) - Body ground Engine switch off 10 kΩ or higher
        I23-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
        J2-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
        J16-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
        S38-11 (MPX1) - Body ground* Engine switch off 10 kΩ or higher

        • *: w/ Sliding Roof System

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. for LHD


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

      2. Reconnect the I23 power window regulator motor assembly (for driver door) connector.

      3. Reconnect the I7 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 I21 multiplex network master switch assembly connector.

      6. Reconnect the S38 sliding roof ECU (sliding roof drive gear assembly) connector.

      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 junction block assembly LH connectors.

      2. Reconnect the I7 power window regulator motor assembly (for driver door) connector.

      3. Reconnect the I23 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 I5 multiplex network master switch assembly connector.

      6. Reconnect the S38 sliding roof ECU (sliding roof drive gear 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

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


    1. for LHD


      1. Reconnect the J16 power window regulator motor assembly (for rear LH door) connector.

      2. Disconnect the I23 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 J16 power window regulator motor assembly (for rear LH door) connector.

      2. Disconnect the I7 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

  7. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. for LHD


      1. Reconnect the I23 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the I21 multiplex network 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 I7 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the I5 multiplex network 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 MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    A

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


    1. for LHD


      1. Reconnect the I21 multiplex network 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 I5 multiplex network 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 Front Passenger Door)


    1. for LHD


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

      2. Disconnect the I7 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 J2 power window regulator motor assembly (for rear RH door) connector.

      2. Disconnect the I23 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

  10. CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)


    1. for LHD


      1. Reconnect the I7 power window regulator motor assembly (for front passenger door) connector.

      2. Disconnect the S38 sliding roof ECU (sliding roof drive gear 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 I23 power window regulator motor assembly (for front passenger door) connector.

      2. Disconnect the S38 sliding roof ECU (sliding roof drive gear 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 ASSEMBLY) Click here