LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2325

DTC Code DTC Name
B2325 LIN Communication Bus Malfunction

DESCRIPTION

If the main body ECU (multiplex network body ECU) detects a communication error with an ECU connected to the door bus lines for 7 seconds or more, DTC B2325 will be stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
B2325 LIN Communication Bus Malfunction The main body ECU (multiplex network body ECU) detects a communication error with an ECU connected to the door bus lines for 7 seconds or more.

  • 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

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

  • Roof sunshade ECU (sliding roof drive gear assembly)*2

  • Double lock door control relay assembly*3

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Wire harness or connector

  • ECU-B NO. 2 fuse

  • DOOR F/L fuse

  • DOOR F/R fuse

  • DOOR R/L fuse

  • DOOR R/R fuse

  • S/ROOF fuse*1*2

  • S/ROOF NO. 2 fuse *2

  • DOOR-DL fuse*3

  • ECU-DCC NO. 2 fuse*3

WIRING DIAGRAM

A01VWO9E11
A01VWO9E12
A01VXM4E01

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 is necessary to perform initialization.

    Click here

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

    Click here

  • When the sliding roof ECU (sliding roof drive gear assembly) or roof sunshade ECU (sliding roof drive gear assembly) is replaced or removed and reinstalled, it is necessary to perform initialization. (w/ Panoramic Moon Roof System)

    Click here

  • Before performing the inspection, check that DTC B1206, B1249, B1273, B2321, B2322, B2323, B2324 or B2329 is not output.

    Click here

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

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before proceeding with troubleshooting, perform an on-vehicle inspection and confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

    Click here


    • *: w/o Canister Pump Module and Door Ajar Warning Function

PROCEDURE


  1. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

      Click here

      A01VV8VC02
      *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
      2D-25 - MB-16 (LIN2) Always Below 1 Ω
      2B-17 - 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 N13 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the M13 power window regulator motor assembly (for front passenger door) connector.

      3. Disconnect the P1 power window regulator motor assembly (for rear LH door) connector.

      4. Disconnect the O1 power window regulator motor assembly (for rear RH door) connector.

      5. Disconnect the N7 multiplex network master switch assembly connector.

      6. Disconnect the U2 sliding roof ECU (sliding roof drive gear sub-assembly) connector.*1

      7. Disconnect the U2 sliding roof ECU (sliding roof drive gear assembly) connector.*2

      8. Disconnect the w1 roof sunshade ECU (sliding roof drive gear assembly) connector.*2

      9. Disconnect the J44 double lock door control relay assembly connector.*3

      10. 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
        2D-25 - N7-7 (LIN1) Engine switch off Below 1 Ω
        2B-17 - U2-7 (MPX1)*1*2 Engine switch off Below 1 Ω
        2B-17 - w1-7 (MPX1)*2 Engine switch off Below 1 Ω
        2B-17 - J44-9 (LIN)*3 Engine switch off Below 1 Ω
        2D-25 - M13-9 (LIN) Engine switch off Below 1 Ω
        2D-25 - P1-9 (LIN) Engine switch off Below 1 Ω
        2D-25 - O1-9 (LIN) Engine switch off Below 1 Ω
        2D-25 - N13-9 (LIN) Engine switch off Below 1 Ω
        N7-7 (LIN1) - Body ground Engine switch off 10 kΩ or higher
        U2-7 (MPX1) - Body ground*1*2 Engine switch off 10 kΩ or higher
        w1-7 (MPX1) - Body ground*2 Engine switch off 10 kΩ or higher
        J44-9 (LIN) - Body ground*3 Engine switch off 10 kΩ or higher
        2D-25 or 2B-17 - Body ground Engine switch off 10 kΩ or higher
        M13-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
        P1-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
        O1-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
        N13-9 (LIN) - Body ground Engine switch off 10 kΩ or higher

        • *1: w/ Sliding Roof System

        • *2: w/ Panoramic Moon Roof System

        • *3: w/ Double Locking System

    2. for RHD


      1. Disconnect the M2 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 P1 power window regulator motor assembly (for rear LH door) connector.

      4. Disconnect the O1 power window regulator motor assembly (for rear RH door) connector.

      5. Disconnect the M7 multiplex network master switch assembly connector.

      6. Disconnect the U2 sliding roof ECU (sliding roof drive gear sub-assembly) connector.*1

      7. Disconnect the U2 sliding roof ECU (sliding roof drive gear assembly) connector.*2

      8. Disconnect the w1 roof sunshade ECU (sliding roof drive gear assembly) connector.*2

      9. Disconnect the J44 double lock door control relay assembly connector.*3

      10. 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
        2D-25 - M7-7 (LIN1) Engine switch off Below 1 Ω
        2B-17 - U2-7 (MPX1)*1*2 Engine switch off Below 1 Ω
        2B-17 - w1-7 (MPX1)*2 Engine switch off Below 1 Ω
        2B-17 - J44-9 (LIN)*3 Engine switch off Below 1 Ω
        2D-25 - M2-9 (LIN) Engine switch off Below 1 Ω
        2D-25 - P1-9 (LIN) Engine switch off Below 1 Ω
        2D-25 - O1-9 (LIN) Engine switch off Below 1 Ω
        2D-25 - N2-9 (LIN) Engine switch off Below 1 Ω
        M7-7 (LIN1) - Body ground Engine switch off 10 kΩ or higher
        U2-7 (MPX1) - Body ground*1*2 Engine switch off 10 kΩ or higher
        w1-7 (MPX1) - Body ground*2 Engine switch off 10 kΩ or higher
        J44-9 (LIN) - Body ground*3 Engine switch off 10 kΩ or higher
        2D-25 or 2B-17 - Body ground Engine switch off 10 kΩ or higher
        M2-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
        P1-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
        O1-9 (LIN) - Body ground Engine switch off 10 kΩ or higher
        N2-9 (LIN) - Body ground Engine switch off 10 kΩ or higher

        • *1: w/ Sliding Roof System

        • *2: w/ Panoramic Moon Roof System

        • *3: 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 2B and 2D instrument panel junction block assembly connectors.

      2. Reconnect the w13 power window regulator motor assembly (for driver door) connector.

      3. Reconnect the M13 power window regulator motor assembly (for front passenger door) connector.

      4. Reconnect the O1 power window regulator motor assembly (for rear RH door) connector.

      5. Reconnect the N7 multiplex network master switch assembly connector.

      6. Reconnect the U2 sliding roof ECU (sliding roof drive gear sub-assembly) connector.*1

      7. Reconnect the U2 sliding roof ECU (sliding roof drive gear assembly) connector.*2

      8. Reconnect the w1 roof sunshade ECU (sliding roof drive gear assembly) connector.*2

      9. Reconnect the J44 double lock door control relay assembly connector.*3

      10. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

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


        Body Electrical > Main Body > Trouble Codes

        • *1: w/ Sliding Roof System

        • *2: w/ Panoramic Moon Roof System

        • *3: w/ Double Locking System

    2. for RHD


      1. Reconnect the 3D and 3H instrument panel junction block assembly connectors.

      2. Reconnect the I2 power window regulator motor assembly (for driver door) connector.

      3. Reconnect the H2 power window regulator motor assembly (for front passenger door) connector.

      4. Reconnect the O1 power window regulator motor assembly (for rear RH door) connector.

      5. Reconnect the M7 multiplex network master switch assembly connector.

      6. Reconnect the U2 sliding roof ECU (sliding roof drive gear sub-assembly) connector.*1

      7. Reconnect the U2 sliding roof ECU (sliding roof drive gear assembly) connector.*2

      8. Reconnect the w1 roof sunshade ECU (sliding roof drive gear assembly) connector.*2

      9. Reconnect the J44 double lock door control relay assembly connector.*3

      10. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

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


        Body Electrical > Main Body > Trouble Codes

        • *1: w/ Sliding Roof System

        • *2: w/ Panoramic Moon Roof System

        • *3: w/ Double Locking 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

  4. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. for LHD


      1. Reconnect the P1 power window regulator motor assembly (for rear LH door) connector.

      2. Disconnect the N7 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 P1 power window regulator motor assembly (for rear LH door) connector.

      2. Disconnect the M7 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

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


    1. for LHD


      1. Reconnect the N7 multiplex network master switch assembly connector.

      2. Disconnect the O1 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 M7 multiplex network master switch assembly connector.

      2. Disconnect the O1 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

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


    1. for LHD


      1. Reconnect the O1 power window regulator motor assembly (for rear RH door) connector.

      2. Disconnect the N13 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 O1 power window regulator motor assembly (for rear RH door) connector.

      2. Disconnect the M2 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 N13 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the M13 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 M2 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
      Result
      Result Proceed to
      DTC B2325 is output (w/ Sliding Roof System) A
      DTC B2325 is output (w/ Panoramic Moon Roof System) B
      DTC B2325 is output (w/ Double Locking System, w/o Sliding Roof System and w/o Panoramic Moon roof System) C
      DTC B2325 is output (w/o Double Locking System, w/o Sliding Roof System and w/o Panoramic Moon roof System) D
      DTC B2325 is not output E

    B

    CHECK ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) Click here

    C

    GO TO STEP 9 Click here

    D

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

    E

    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. the I2 power window regulator motor assembly (for front passenger door) connector.

    2. Disconnect the U2 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 ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) Click here

    A

  9. CHECK DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY


    1. Reconnect each ECU connector.

    2. Disconnect the J44 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 ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)


    1. Reconnect each ECU connector.

    2. Disconnect the w1 roof sunshade 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

    B

    REPLACE ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) Click here

    A

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


    1. Reconnect each ECU connector.

    2. Disconnect the U2 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 (w/ Double Locking System) A
      DTC B2325 is output (w/o Double Locking System) B
      DTC B2325 is not output C

    A

    GO TO STEP 9 Click here

    B

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

    C

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