LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2325

DTC Code DTC Name
B2325 LIN Communication Bus Malfunction

DESCRIPTION

The main body ECU (multiplex network body ECU) intermittently monitors the LIN communication bus between the components related to the doors and sliding roof drive gear sub-assembly. DTC B2325 is stored when a malfunction in the LIN communication bus between the components related to the doors and sliding roof drive gear sub-assembly is detected consecutively 3 times.

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.

  • Front power window regulator motor assembly LH*1

  • Front power window regulator motor assembly RH*2

  • Double lock door control relay assembly*3

  • Sliding roof drive gear sub-assembly*4

  • Main body ECU (multiplex network body ECU)

  • Harness or connector

  • Instrument panel junction block assembly

WIRING DIAGRAM

A01VALNE03

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the ignition switch off to troubleshoot:

    Connect the GTS to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the GTS and vehicle begins.

  • When a power window regulator motor assembly (driver side) is removed and reinstalled or replaced, a power window regulator motor assembly (driver side) must be initialized.

    Click here

  • When the sliding roof drive gear sub-assembly is removed and reinstalled or replaced, the sliding roof drive gear sub-assembly must be initialized.

    Click here

  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

Tech Tips

When DTC B2325 and a LIN communication stop DTC are output simultaneously, first perform troubleshooting for DTC B2325. Then perform troubleshooting for the LIN communication stop DTC.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      DTC B2325 is output
      DTC B2325 is not output

    DTC B2325 is not output

    USE SIMULATION METHOD TO CHECK Click here

    DTC B2325 is output

  3. CHECK HARNESS AND CONNECTOR (LIN BUS CIRCUIT)


    • *1: w/ Sliding Roof System

    • *2: for LHD, w/ Jam Protection Function

    • *3: for RHD, w/ Jam Protection Function

    • *4: w/ Double Locking System


    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      for LHD: Click here

      for RHD: Click here

    2. Disconnect the Q8 sliding roof drive gear sub-assembly*1 connector.

    3. Disconnect the J3 front power window regulator motor assembly LH*2 connector.

    4. Disconnect the I3 front power window regulator motor assembly RH*3 connector.

    5. Disconnect the G66 double lock door control relay assembly*4 connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-16 (LIN2) - Q8-11 (MPX1)*1 Always Below 1 Ω
      A-16 (LIN2) - J3-9 (LIN)*2 Always Below 1 Ω
      A-16 (LIN2) - I3-9 (LIN)*3 Always Below 1 Ω
      A-16 (LIN2) - G66-9 (MPX1)*4 Always Below 1 Ω
      Q8-11 (MPX1) - Body ground*1 Always 10 kΩ or higher
      J3-9 (LIN) - Body ground*2 Always 10 kΩ or higher
      I3-9 (LIN) - Body ground*3 Always 10 kΩ or higher
      G66-9 (MPX1) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (LIN BUS CIRCUIT) Click here

    OK

  4. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK FOR DTC

    Note

    For vehicles without a sliding roof system, go to "Clear DTC".


    1. Disconnect the Q8 sliding roof drive gear assembly connector.

    2. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      DTC B2325 is output
      DTC B2325 is not output

    DTC B2325 is not output

    REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY Click here

    DTC B2325 is output

  6. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

  7. CHECK FOR DTC

    Note

    For vehicles without a double locking system, go to "Clear DTC".


    1. Disconnect the G66 double lock door control relay assembly connector.

    2. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      DTC B2325 is output
      DTC B2325 is not output

    DTC B2325 is not output

    REPLACE DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY Click here

    DTC B2325 is output

  8. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

  9. CHECK FOR DTC


    1. Disconnect the J3 front power window regulator motor assembly LH*1 or I3 front power window regulator motor assembly RH*2 connector.


      • *1: for LHD

      • *2: for RHD

    2. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      DTC B2325 is output (for LHD)
      DTC B2325 is output (for RHD)
      DTC B2325 is not output (for LHD)
      DTC B2325 is not output (for RHD)

    DTC B2325 is output (for LHD)

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

    DTC B2325 is output (for RHD)

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

    DTC B2325 is not output (for LHD)

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    DTC B2325 is not output (for RHD)

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

  10. CHECK HARNESS AND CONNECTOR (LIN BUS CIRCUIT)


    • *1: w/ Sliding Roof System

    • *2: for LHD, w/ Jam Protection Function

    • *3: for RHD, w/ Jam Protection Function

    • *4: w/ Double Locking System


    1. Disconnect the 3D instrument panel junction block assembly connector.

    2. Disconnect the Q8 sliding roof drive gear sub-assembly*1 connector.

    3. Disconnect the J3 front power window regulator motor assembly LH*2 connector.

    4. Disconnect the I3 front power windowregulator motor assembly RH*3 connector.

    5. Disconnect the G66 double lock door control relay assembly*4 connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3D-54 - Q8-11 (MPX1)*1 Always Below 1 Ω
      3D-54 - J3-9 (LIN)*2 Always Below 1 Ω
      3D-54 - I3-9 (LIN)*3 Always Below 1 Ω
      3D-54 - G66-9 (MPX1)*4 Always Below 1 Ω
      Q8-11 (MPX1) - Body ground*1 Always 10 kΩ or higher
      J3-9 (LIN) - Body ground*2 Always 10 kΩ or higher
      I3-9 (LIN) - Body ground*3 Always 10 kΩ or higher
      G66-9 (MPX1) - Body ground*4 Always 10 kΩ or higher
      Result
      Result
      OK (for LHD)
      OK (for RHD)
      NG

    OK (for LHD)

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK (for RHD)

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR