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

  • Double lock door control relay assembly*

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Wire harness or connector

  • ECU-B NO. 2 fuse

  • POWER fuse

  • DOOR fuse

  • DOOR R/L fuse

  • DOOR R/R fuse

  • DOOR DBL/L fuse*

  • ECU-DCC NO. 2 fuse*

WIRING DIAGRAM

A003MO1E02

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

  • Before performing the inspection, check that DTC B1206, B1249, 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

      A003LCLC04
      *A w/ Double Locking System - -
      *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
      3H-25 - MB-16 (LIN2) Always Below 1 Ω
      3D-17 - MB-16 (LIN2)* Always Below 1 Ω

      • *: w/ Double Locking System

      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 K2 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the J2 power window regulator motor assembly (for front passenger door) connector.

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

      4. Disconnect the L2 power window regulator motor assembly (for rear RH door) connector.

      5. Disconnect the K7 multiplex network master switch assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        3H-25 - K7-17 (LIN1) Power switch off Below 1 Ω
        3H-25 - J2-9 (LIN) Power switch off Below 1 Ω
        3H-25 - M2-9 (LIN) Power switch off Below 1 Ω
        3H-25 - L2-9 (LIN) Power switch off Below 1 Ω
        3H-25 - K2-9 (LIN) Power switch off Below 1 Ω
        3H-25 - Body ground Power switch off 10 kΩ or higher
        K7-17 (LIN1) - Body ground Power switch off 10 kΩ or higher
        J2-9 (LIN) - Body ground Power switch off 10 kΩ or higher
        M2-9 (LIN) - Body ground Power switch off 10 kΩ or higher
        L2-9 (LIN) - Body ground Power switch off 10 kΩ or higher
        K2-9 (LIN) - Body ground Power switch off 10 kΩ or higher

    2. for RHD


      1. Disconnect the J2 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the K2 power window regulator motor assembly (for front passenger door) connector.

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

      4. Disconnect the L2 power window regulator motor assembly (for rear RH door) connector.

      5. Disconnect the J7 multiplex network master switch assembly connector.

      6. Disconnect the I16 double lock door control relay assembly connector.*

      7. 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 180 seconds or more without operating any switches.

        Standard Resistance
        Tester Connection Condition Specified Condition
        3H-25 - J7-17 (LIN1) Power switch off Below 1 Ω
        3D-17 - I16-9 (LIN)* Power switch off Below 1 Ω
        3H-25 - J2-9 (LIN) Power switch off Below 1 Ω
        3H-25 - M2-9 (LIN) Power switch off Below 1 Ω
        3H-25 - L2-9 (LIN) Power switch off Below 1 Ω
        3H-25 - K2-9 (LIN) Power switch off Below 1 Ω
        J7-17 (LIN1) - Body ground Power switch off 10 kΩ or higher
        I16-9 (LIN) - Body ground* Power switch off 10 kΩ or higher
        3H-25 or 3D-17* - Body ground Power switch off 10 kΩ or higher
        J2-9 (LIN) - Body ground Power switch off 10 kΩ or higher
        M2-9 (LIN) - Body ground Power switch off 10 kΩ or higher
        L2-9 (LIN) - Body ground Power switch off 10 kΩ or higher
        K2-9 (LIN) - Body ground Power switch off 10 kΩ or higher

        • *: 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 3H instrument panel junction block assembly connector.

      2. Reconnect the K2 power window regulator motor assembly (for driver door) connector.

      3. Reconnect the J2 power window regulator motor assembly (for front passenger door) connector.

      4. Reconnect the L2 power window regulator motor assembly (for rear RH door) connector.

      5. Reconnect the K7 multiplex network master switch assembly connector.

      6. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

      7. 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 3D* and 3H instrument panel junction block assembly connectors.

      2. Reconnect the J2 power window regulator motor assembly (for driver door) connector.

      3. Reconnect the K2 power window regulator motor assembly (for front passenger door) connector.

      4. Reconnect the L2 power window regulator motor assembly (for rear RH door) connector.

      5. Reconnect the J7 multiplex network master switch assembly connector.

      6. Reconnect the I16 double lock door control relay 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

        • *: 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 M2 power window regulator motor assembly (for rear LH door) connector.

      2. Disconnect the K7 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 M2 power window regulator motor assembly (for rear LH door) connector.

      2. Disconnect the J7 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 K7 multiplex network master switch assembly connector.

      2. Disconnect the L2 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 J7 multiplex network master switch assembly connector.

      2. Disconnect the L2 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 L2 power window regulator motor assembly (for rear RH door) connector.

      2. Disconnect the K2 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 L2 power window regulator motor assembly (for rear RH door) connector.

      2. Disconnect the J2 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 > Clear DTCs
      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 K2 power window regulator motor assembly (for driver door) connector.

      2. Disconnect the J2 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 driver door) connector.

      2. Disconnect the K2 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/ 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 POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door) Click here

    A

  8. CHECK DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY


    1. Reconnect each ECU connector.

    2. Disconnect the I16 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