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. DTC Detection Condition Trouble Area
B2325 Main body ECU (multiplex network body ECU) detects errors in communication with the ECUs connected to the door bus lines at 2.6-second intervals and 3 times in a row.

  • Front door window regulator assembly (for driver side)

  • Front door window regulator assembly (for front passenger side)

  • Rear door window regulator assembly (for rear RH side)

  • Rear door window regulator assembly (for rear LH side)

  • 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

WIRING DIAGRAM

A003UWKE01

INSPECTION PROCEDURE

Tech Tips

When the main body ECU (multiplex network body ECU) has been replaced with a new part, and the cable from the negative (-) battery terminal is reconnected, the power switch will be on (IG). Also, when the battery has been removed and installed, the condition will be the same as it was before the battery was disconnected.

Note


  • When the sliding roof ECU (sliding roof drive gear assembly) is replaced or removed and reinstalled, it requires initialization Click here.

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

  • When using the intelligent tester to troubleshoot with the power switch off:

    Connect the intelligent tester to the DLC3, and turn the courtesy switch on and off at 1.5-second intervals until communication between the intelligent tester and vehicle begins.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR (DRIVER SIDE) - MASTER SWITCH)


    1. Disconnect the I13*1 or H12*2 multiplex network master switch connector.

    2. Disconnect the I6*1 or H5*2 power window regulator motor (for driver side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      I13-16 (LIN2) - I6-9 (LIN)*1

      H12-16 (LIN2) - H5-9 (LIN)*2

      		 Always Below 1 Ω

      I13-16 (LIN2) - Body ground*1

      H12-16 (LIN2) - Body ground*2

      		 Always 10 kΩ or higher

      • *1: for LHD

      • *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. A003T73E04
      Text in Illustration
      *1

      Component without harness connected

      (Multiplex Network Master Switch Assembly)

      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
      16 (LIN2) - 17 (LIN1) Always Below 1 Ω
      16 (LIN2) - Body ground Always 10 kΩ or higher

    NG

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    OK

  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the 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 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-26 (LIN2) - MB-16 (LIN2) Always Below 1 Ω
      2A-27 (LIN2) - MB-16 (LIN2) Always Below 1 Ω
      2A-27 (LIN2) - Body ground Always 10 kΩ or higher

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    OK

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


    1. Disconnect the H13*1, I11*2, E72*3, O9*4, J6 and K6 connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2D-26 (LIN2) - K6-9 (LIN) Always Below 1 Ω
      2A-27 (LIN2) - J6-9 (LIN) Always Below 1 Ω

      2A-27 (LIN2) - I13-17 (LIN1)*1

      2A-27 (LIN2) - H12-17 (LIN1)*2

      		 Always Below 1 Ω

      2A-27 (LIN2) - H13-9 (LIN)*1

      2A-27 (LIN2) - I11-9 (LIN)*2

      		 Always Below 1 Ω
      2A-27 (LIN2) - E72-9 (MPX1)*3 Always Below 1 Ω
      2A-27 (LIN2) - O9-4 (MPX1)*4 Always Below 1 Ω
      2D-26 (LIN2) - Body ground Always 10 kΩ or higher
      2A-27 (LIN2) - Body ground Always 10 kΩ or higher

      • *1: for LHD

      • *2: for RHD

      • *3: w/ Double Locking System

      • *4: w/ Sliding Roof


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK DTC OUTPUT (REAR DOOR WINDOW REGULATOR ASSEMBLY (for REAR LH SIDE))


    1. Reconnect the I13*1, H12*2, E72*3, 2A, 2D, O9*4, J6, I11 and H13 connectors.


      • *1: for LHD

      • *2: for RHD

      • *3: w/ Double Locking System

      • *4: w/ Sliding Roof

    2. Clear the DTCs Click here.

    3. After 10 seconds have elapsed, check if the trouble occurs again.

    4. Check for DTCs again.

      Result
      Result Proceed to
      DTC B2325 is output A
      DTC B2325 is not output B

    B

    REPLACE REAR DOOR WINDOW REGULATOR ASSEMBLY (for REAR LH SIDE) Click here

    A

  6. CHECK DTC OUTPUT (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)


    1. Reconnect the K6 connector.

    2. Disconnect the I13*1 or H12*2 connector.


      • *1: for LHD

      • *2: for RHD

    3. Clear the DTCs Click here.

    4. After 10 seconds have elapsed, check if the trouble occurs again.

    5. Check for DTCs again.

      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

  7. CHECK DTC OUTPUT (REAR DOOR WINDOW REGULATOR ASSEMBLY (for REAR RH SIDE))


    1. Reconnect the I13*1 or H12*2 connector.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the J6 connector.

    3. Clear the DTCs Click here.

    4. After 10 seconds have elapsed, check if the trouble occurs again.

    5. Check for DTCs again.

      Result
      Result Proceed to
      DTC B2325 is output A
      DTC B2325 is not output B

    B

    REPLACE REAR DOOR WINDOW REGULATOR ASSEMBLY (for REAR RH SIDE) Click here

    A

  8. CHECK DTC OUTPUT (FRONT DOOR WINDOW REGULATOR ASSEMBLY (for DRIVER SIDE))


    1. Reconnect the J6 connector.

    2. Disconnect the I6*1 or H5*2 connector.


      • *1: for LHD

      • *2: for RHD

    3. Clear the DTCs Click here.

    4. After 10 seconds have elapsed, check if the trouble occurs again.

    5. Check for DTCs again.

      Result
      Result Proceed to
      DTC B2325 is output A
      DTC B2325 is not output B

    B

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY (for DRIVER SIDE) Click here

    A

  9. CHECK DTC OUTPUT (FRONT DOOR WINDOW REGULATOR ASSEMBLY (for FRONT PASSENGER SIDE))


    1. Reconnect the I6*1 or H5*2 connector.

    2. Disconnect the H5*1 or I6*2 connector.


      • *1: for LHD

      • *2: for RHD

    3. Clear the DTCs Click here.

    4. After 10 seconds have elapsed, check if the trouble occurs again.

    5. Check for DTCs again.

      Result
      Result Proceed to
      DTC B2325 is output (w/ Sliding Roof) A
      DTC B2325 is output (w/ Double Locking System and w/o Sliding Roof) B
      DTC B2325 is output (w/o Double Locking System and w/o Sliding Roof) C
      DTC B2325 is not output D

    B

    CHECK DTC OUTPUT (DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY) Click here

    C

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    D

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY (for FRONT PASSENGER SIDE) Click here

    A

  10. CHECK DTC OUTPUT (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY))


    1. Reconnect the H5*1 or I6*2 connector.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the O9 connector.

    3. Clear the DTCs Click here.

    4. After 10 seconds have elapsed, check if the trouble occurs again.

    5. Check for DTCs again.

      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)

    C

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

    A

  11. CHECK DTC OUTPUT (DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY)


    1. Reconnect the O9*1 connector.


      • *1: w/ Sliding Roof

    2. Disconnect the E72 connector.

    3. Clear the DTCs Click here.

    4. After 10 seconds have elapsed, check if the trouble occurs again.

    5. Check for DTCs again.

      Result
      Result Proceed to
      DTC B2325 is output A
      DTC B2325 is not output B

    B

    REPLACE DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY

    A

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)