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.

  • 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)

  • Instrument panel junction block assembly

  • Harness or connector

WIRING DIAGRAM

A01XP4RE01

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 HARNESS AND CONNECTOR (LIN BUS CIRCUIT)


    • *1: for LHD

    • *2: for RHD

    • *3: w/ Double Locking System

    • *4: w/ Sliding Roof System

    • *5: w/ Roof Sunshade 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

      Connect the instrument panel junction block assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      A-16 (LIN2) - M10-17 (LIN1)*1

      A-16 (LIN2) - L3-17 (LIN1)*2

      		 Always Below 1 Ω
      A-16 (LIN2) - M2-9 (LIN) Always Below 1 Ω
      A-16 (LIN2) - L2-9 (LIN) Always Below 1 Ω
      A-16 (LIN2) - O2-9 (LIN) Always Below 1 Ω
      A-16 (LIN2) - N2-9 (LIN) Always Below 1 Ω
      A-16 (LIN2) - I129-9 (MPX1)*3 Always Below 1 Ω
      A-16 (LIN2) - T9-11 (MPX1)*4, 5 Always Below 1 Ω

      M10-17 (LIN1) - Body ground*1

      L3-17 (LIN1) - Body ground*2

      		 Always 10 kΩ or higher
      M2-9 (LIN) - Body ground Always 10 kΩ or higher
      L2-9 (LIN) - Body ground Always 10 kΩ or higher
      O2-9 (LIN) - Body ground Always 10 kΩ or higher
      N2-9 (LIN) - Body ground Always 10 kΩ or higher
      I129-9 (MPX1) - Body ground*3 Always 10 kΩ or higher
      T9-11 (MPX1) - Body ground*4, *5 Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (w/ Sliding Roof System or Roof Sunshade System) A
      OK (w/o Sliding Roof System, Roof Sunshade System and w/ Double Locking System) B
      OK (w/o Sliding Roof System, Roof Sunshade System and w/o Double Locking System) C
      NG D

    B

    GO TO STEP 6 Click here

    C

    GO TO STEP 8 Click here

    D

    CHECK HARNESS AND CONNECTOR (LIN BUS CIRCUIT) Click here

    A

  4. CLEAR DTC


    1. Clear the DTCs.

      Click here


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

    NEXT

  5. CHECK FOR DTC


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

    2. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Proceed to
      DTC B2325 is output (w/ Double Locking System)
      DTC B2325 is output (w/o Double Locking System)
      DTC B2325 is not output

    DTC B2325 is output (w/o Double Locking System)

    GO TO STEP 8 Click here

    DTC B2325 is not 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 (w/ Double Locking System)

  6. CLEAR DTC


    1. Clear the DTCs.

      Click here


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

    NEXT

  7. CHECK FOR DTC


    1. Disconnect the I129 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 > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  9. CHECK FOR DTC


    1. Disconnect the M10*1 or L3* multiplex network master switch assembly 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
      DTC B2325 is not output

    DTC B2325 is not output

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    DTC B2325 is output

  10. CLEAR DTC


    1. Clear the DTCs.

      Click here


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

    NEXT

  11. CHECK FOR DTC


    1. Disconnect the M2 front power window regulator motor assembly LH 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 FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    DTC B2325 is output

  12. CLEAR DTC


    1. Clear the DTCs.

      Click here


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

    NEXT

  13. CHECK FOR DTC


    1. Disconnect the L2 front power window regulator motor assembly RH 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 FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    DTC B2325 is output

  14. CLEAR DTC


    1. Clear the DTCs.

      Click here


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

    NEXT

  15. CHECK FOR DTC


    1. Disconnect the O2 rear power window regulator motor assembly LH 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 REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    DTC B2325 is output

  16. CLEAR DTC


    1. Clear the DTCs.

      Click here


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

    NEXT

  17. CHECK FOR DTC


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

    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

    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

    REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

  18. CHECK HARNESS AND CONNECTOR (LIN BUS CIRCUIT)


    • *1: for LHD

    • *2: for RHD

    • *3: w/ Double Locking System

    • *4: w/ Sliding Roof System

    • *5: w/ Roof Sunshade System


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

      Standard Resistance
      Tester Connection Condition Specified Condition

      4D-41 - M10-17 (LIN1)*1

      4D-41 - L3-17 (LIN1)*2

      		 Always Below 1 Ω
      4D-41 - M2-9 (LIN) Always Below 1 Ω
      4D-41 - L2-9 (LIN) Always Below 1 Ω
      4D-41 - O2-9 (LIN) Always Below 1 Ω
      4D-41 - N2-9 (LIN) Always Below 1 Ω
      4D-41 - I129-9 (MPX1)*3 Always Below 1 Ω
      4D-41 - T9-11 (MPX1)*4, *5 Always Below 1 Ω

      M10-17 (LIN1) - Body ground*1

      L3-17 (LIN1) - Body ground*2

      		 Always 10 kΩ or higher
      M2-9 (LIN) - Body ground Always 10 kΩ or higher
      L2-9 (LIN) - Body ground Always 10 kΩ or higher
      O2-9 (LIN) - Body ground Always 10 kΩ or higher
      N2-9 (LIN) - Body ground Always 10 kΩ or higher
      I129-9 (MPX1) - Body ground*3 Always 10 kΩ or higher
      T9-11 (MPX1) - Body ground*4, *5 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