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 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)

  • Multiplex network master switch assembly

  • Sliding roof ECU (sliding roof drive gear sub-assembly)*1

  • Double lock door control relay assembly*2

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Wire harness or connector

  • P/W fuse

  • DOOR F/L fuse

  • DOOR F/R fuse

  • DOOR R/L fuse

  • DOOR R/R fuse

  • S/ROOF fuse*1

  • DOOR DBL/L fuse*2

  • MPX-B NO. 1 fuse*2

WIRING DIAGRAM

A01MSAGE03
A01MSAGE04

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, B1249, 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 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

      Click here

      A01MS2NC11
      *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
      4B-21 - MB-16 (LIN2) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

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


    1. for LHD


      1. Disconnect the N17 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the N2 power window regulator motor assembly (for front passenger door) connector.

      3. Disconnect the O7 power window regulator motor assembly (for rear LH door) connector.

      4. Disconnect the O2 power window regulator motor assembly (for rear RH door) connector.

      5. Disconnect the N27*1 or N18*2 multiplex network master switch assembly connector.


        • *1: w/o Seat Position Memory System

        • *2: w/ Seat Position Memory System

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


        • *3: w/ Sliding Roof System

      7. Disconnect the K42 double lock door control relay assembly connector.*4


        • *4: w/ Double Locking System

      8. 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 power switch from on (IG) to off and wait for 60 seconds or more without operating any switches.

        Standard Resistance
        Tester Connection Condition Specified Condition
        4B-21 - N27-7 (LIN1)*1 Power switch off Below 1 Ω
        4B-21 - N18-17 (LIN1)*2 Power switch off Below 1 Ω
        4B-21 - S5-11 (MPX1)*3 Power switch off Below 1 Ω
        4B-21 - K42-9 (LIN)*4 Power switch off Below 1 Ω
        4B-21 - N2-9 (LIN) Power switch off Below 1 Ω
        4B-21 - O7-9 (LIN) Power switch off Below 1 Ω
        4B-21 - O2-9 (LIN) Power switch off Below 1 Ω
        4B-21 - N17-9 (LIN) Power switch off Below 1 Ω
        N27-7 (LIN1) - Body ground*1 Power switch off 10 kΩ or higher
        N18-17 (LIN1) - Body ground*2 Power switch off 10 kΩ or higher
        S5-11 (MPX1) - Body ground*3 Power switch off 10 kΩ or higher
        K42-9 (LIN) - Body ground*4 Power switch off 10 kΩ or higher
        4B-21 - Body ground Power switch off 10 kΩ or higher
        N2-9 (LIN) - Body ground Power switch off 10 kΩ or higher
        O7-9 (LIN) - Body ground Power switch off 10 kΩ or higher
        O2-9 (LIN) - Body ground Power switch off 10 kΩ or higher
        N17-9 (LIN) - Body ground Power switch off 10 kΩ or higher

        • *1: w/o Seat Position Memory System

        • *2: w/ Seat Position Memory System

        • *3: w/ Sliding Roof System

        • *4: w/ Double Locking System

    2. for RHD


      1. Disconnect the N2 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the N17 power window regulator motor assembly (for front passenger door) connector.

      3. Disconnect the O7 power window regulator motor assembly (for rear LH door) connector.

      4. Disconnect the O2 power window regulator motor assembly (for rear RH door) connector.

      5. Disconnect the N12*1 or N3*2 multiplex network master switch assembly connector.


        • *1: w/o Seat Position Memory System

        • *2: w/ Seat Position Memory System

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


        • *3: w/ Sliding Roof System

      7. Disconnect the K42 double lock door control relay assembly connector.*4


        • *4: w/ Double Locking System

      8. 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 power switch from on (IG) to off and wait for 60 seconds or more without operating any switches.

        Standard Resistance
        Tester Connection Condition Specified Condition
        4B-21 - N12-7 (LIN1)*1 Power switch off Below 1 Ω
        4B-21 - N3-17 (LIN1)*2 Power switch off Below 1 Ω
        4B-21 - S5-11 (MPX1)*3 Power switch off Below 1 Ω
        4B-21 - K42-9 (LIN)*4 Power switch off Below 1 Ω
        4B-21 - N2-9 (LIN) Power switch off Below 1 Ω
        4B-21 - O7-9 (LIN) Power switch off Below 1 Ω
        4B-21 - O2-9 (LIN) Power switch off Below 1 Ω
        4B-21 - N17-9 (LIN) Power switch off Below 1 Ω
        N12-7 (LIN1) - Body ground*1 Power switch off 10 kΩ or higher
        N3-17 (LIN1) - Body ground*2 Power switch off 10 kΩ or higher
        S5-11 (MPX1) - Body ground*3 Power switch off 10 kΩ or higher
        K42-9 (LIN) - Body ground*4 Power switch off 10 kΩ or higher
        4B-21 - Body ground Power switch off 10 kΩ or higher
        N2-9 (LIN) - Body ground Power switch off 10 kΩ or higher
        O7-9 (LIN) - Body ground Power switch off 10 kΩ or higher
        O2-9 (LIN) - Body ground Power switch off 10 kΩ or higher
        N17-9 (LIN) - Body ground Power switch off 10 kΩ or higher

        • *1: w/o Seat Position Memory System

        • *2: w/ Seat Position Memory System

        • *3: w/ Sliding Roof System

        • *4: w/ Double Locking System

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. for LHD


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

      2. Reconnect the N17 power window regulator motor assembly (for driver door) connector.

      3. Reconnect the N2 power window regulator motor assembly (for front passenger door) connector.

      4. Reconnect the O2 power window regulator motor assembly (for rear RH door) connector.

      5. Reconnect the N27*1 or N18*2 multiplex network master switch assembly connector.


        • *1: w/o Seat Position Memory System

        • *2: w/ Seat Position Memory System

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


        • *3: w/ Sliding Roof System

      7. Reconnect the K42 double lock door control relay assembly connector.*4


        • *4: w/ Double Locking System

      8. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      9. 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 4B instrument panel junction block assembly connector.

      2. Reconnect the N2 power window regulator motor assembly (for driver door) connector.

      3. Reconnect the N17 power window regulator motor assembly (for front passenger door) connector.

      4. Reconnect the O2 power window regulator motor assembly (for rear RH door) connector.

      5. Reconnect the N12*1 or N3*2 multiplex network master switch assembly connector.


        • *1: w/o Seat Position Memory System

        • *2: w/ Seat Position Memory System

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


        • *3: w/ Sliding Roof System

      7. Reconnect the K42 double lock door control relay assembly connector.*4


        • *4: w/ Double Locking System

      8. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      9. 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

  4. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. for LHD


      1. Reconnect the O7 power window regulator motor assembly (for rear LH door) connector.

      2. Disconnect the N27*1 or N18*2 multiplex network master switch assembly connector.


        • *1: w/o Seat Position Memory System

        • *2: w/ Seat Position Memory System

      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 O7 power window regulator motor assembly (for rear LH door) connector.

      2. Disconnect the N12*1 or N3*2 multiplex network master switch assembly connector.


        • *1: w/o Seat Position Memory System

        • *2: w/ Seat Position Memory System

      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

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


    1. for LHD


      1. Reconnect the N27*1 or N18*2 multiplex network master switch assembly connector.


        • *1: w/o Seat Position Memory System

        • *2: w/ Seat Position Memory System

      2. Disconnect the O2 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 N12*1 or N3*2 multiplex network master switch assembly connector.


        • *1: w/o Seat Position Memory System

        • *2: w/ Seat Position Memory System

      2. Disconnect the O2 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 RH Click here

    A

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


    1. for LHD


      1. Reconnect the O2 power window regulator motor assembly (for rear RH door) connector.

      2. Disconnect the N17 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 O2 power window regulator motor assembly (for rear RH door) connector.

      2. Disconnect the N2 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 POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door)


    1. for LHD


      1. Reconnect the N17 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the N2 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 N2 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the N17 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/ Double Locking System and w/o Sliding Roof System) B
      DTC B2325 is output (w/o Double Locking System and w/o Sliding Roof System) C
      DTC B2325 is not output D

    B

    CHECK DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY Click here

    C

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

    D

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door) Click here

    A

  8. CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)


    1. for LHD


      1. Reconnect the N2 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 N17 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 (w/ Double Locking System) A
      DTC B2325 is output (w/o Double Locking System) B
      DTC B2325 is not output C

    B

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

    C

    REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY Click here

    A

  9. CHECK DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY


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

    2. Disconnect the K42 double lock door control relay 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 DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY Click here

  10. CHECK DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY


    1. for LHD


      1. Reconnect the N2 power window regulator motor assembly (for front passenger door) connector.

      2. Disconnect the K42 double lock door control relay 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 N17 power window regulator motor assembly (for front passenger door) connector.

      2. Disconnect the K42 double lock door control relay 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 DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY Click here