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, Double lock door control relay assembly*1, sliding roof drive gear sub-assembly*2,*3 and kick door control sensor*4. 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.

  • Multiplex network master switch assembly

  • Front power window regulator motor assembly LH

  • Front power window regulator motor assembly RH

  • Rear power window regulator motor assembly LH

  • Rear power window regulator motor assembly RH

  • Double lock door control relay assembly*1

  • Sliding roof drive gear sub-assembly*2, *3

  • Main body ECU (multiplex network body ECU)

  • Kick door control sensor*4

  • Instrument panel junction block assembly

  • Harness or connector

WIRING DIAGRAM

B0059G2E02

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the engine 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 the power window regulator motor assembly (driver side) is removed and reinstalled or replaced, the power window regulator motor assembly (driver side) must be initialized.

    Click here

  • w/ Sliding Roof System:

    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

  • w/ Roof Sunshade System:

    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

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

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*

    *: w/ Door Control Battery

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 MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    2. Disconnect the M10*1 or L3* multiplex network master switch assembly connector.


      • *1: for LHD

      • *2: for RHD

    3. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      DTC B1206 is output
      DTC B2325 is output

    DTC B1206 is output

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    DTC B2325 is output

  4. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBL (DRIVER SIDE)


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    2. for LHD:


      1. Disconnect the M2 front power window regulator motor assembly LH connector.

    3. for RHD:


      1. Disconnect the L2 front power window regulator motor assembly RH connector.

    4. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      DTC B2321 is output (for LHD)
      DTC B2321 is output (for RHD)
      DTC B2325 is output

    DTC B2321 is output (for LHD)

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    DTC B2321 is output (for RHD)

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    DTC B2325 is output

  5. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBL (PASSENGER SIDE)


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    2. for LHD:


      1. Disconnect the L2 front power window regulator motor assembly RH connector.

    3. for RHD:


      1. Disconnect the M2 front power window regulator motor assembly LH connector.

    4. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      DTC B2322 is output (for LHD)
      DTC B2322 is output (for RHD)
      DTC B2325 is output

    DTC B2322 is output (for LHD)

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    DTC B2322 is output (for RHD)

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    DTC B2325 is output

  6. CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    2. Disconnect the N2 rear power window regulator motor assembly RH connector.

    3. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      DTC B2323 is output
      DTC B2323 is not output

    DTC B2323 is output

    REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    DTC B2323 is not output

  7. CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    2. Disconnect the O2 rear power window regulator motor assembly LH connector.

    3. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      DTC B2324 is output
      DTC B2325 is output

    DTC B2324 is output

    REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    DTC B2325 is output

  8. CHECK SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY

    Note

    For vehicle without a sliding loof system, proceed to next step.


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    2. Disconnect the T9 sliding roof drive gear sub-assembly connector.

    3. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      DTC B1273 is output
      DTC B2325 is output

    DTC B1273 is output

    REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY w/ Sliding Roof System: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY Click here
    REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY w/ Roof Sunshade System: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY Click here

    DTC B2325 is output

  9. CHECK DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY

    Note

    For vehicle without a double locking stem, proceed to next step.


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    2. Disconnect the I129 double lock door control relay assembly connector.

    3. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      DTC B1249 is output
      DTC B2325 is output

    DTC B1249 is output

    REPLACE DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY Click here

    DTC B2325 is output

  10. CHECK KICK DOOR CONTROL SENSOR

    Note

    For vehicle without a hands free power back door, proceed to next step.


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs

    2. Disconnect the W9 kick door control sensor connector.

    3. Check for DTCs.

      Click here


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

    DTC B2325 is not output

    REPLACE KICK DOOR CONTROL SENSOR Click here

    DTC B2325 is output

  11. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)


    • *1: for LHD

    • *2: for RHD

    • *3: w/ Double Locking System

    • *4: w/ Sliding Roof System

    • *5: w/ Roof Sunshade System

    • *6: w/ Hands Free Power Back Door


    1. Disconnect the 4D instrument panel junction block assembly connector.

    2. Disconnect the M10*1 or L3*2 multiplex network master switch assembly connector.

    3. Disconnect the M2 front power window regulator motor assembly LH connector.

    4. Disconnect the L2 front power window regulator motor assembly RH connector.

    5. Disconnect the O2 rear power window regulator motor assembly LH connector.

    6. Disconnect the N2 rear power window regulator motor assembly RH connector.

    7. Disconnect the I129 double lock door control relay assembly connector.*3

    8. Disconnect the T9 sliding roof drive gear sub-assembly connector.*4, *5

    9. Disconnect the W9 kick door control sensor connector.*6

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      M10-17 (LIN1) - Body ground*1

      L3-17 (LIN1) - Body ground*2

      		 Always 10 kΩ or higher
      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - BODY GROUND)


    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. Connect the instrument panel junction block assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-16 (LIN2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for LHD: REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here
    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for RHD: REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY for LHD: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here
    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY for RHD: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here