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LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2325

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DTC Code DTC Name
B2325 LIN Communication Bus Malfunction
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DESCRIPTION

If the main body ECU (multiplex network body ECU) detects a communication error with an ECU connected to the door bus lines for 8 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 8 seconds or more.

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Multiplex network master switch assembly

  • Power window regulator motor assembly (driver door)

  • Power window regulator motor assembly (front passenger door)

  • Power window regulator motor assembly (rear LH door)

  • Power window regulator motor assembly (rear RH door)

  • Sliding roof ECU (sliding roof drive gear assembly)*

  • Roof sunshade ECU (sliding roof drive gear assembly)*

  • Wire harness or connector

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • When a power window regulator motor assembly is replaced or removed and reinstalled, it is necessary to perform initialization.

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  • When the sliding roof ECU (sliding roof drive gear assembly) or roof sunshade ECU (sliding roof drive gear assembly) is replaced or removed and reinstalled, it is necessary to perform initialization.*

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    • *: w/ Panoramic Moon Roof System

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.*


    • *: w/ Smart Entry and Start System

  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing this troubleshooting procedure, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

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    • *: w/ Door Control Battery

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PROCEDURE


  1. Click here

    CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)


    1. Disconnect the O6*1 or N7*2 power window regulator motor assembly (driver door) connector.


      • *1: for LHD

      • *2: for RHD

    2. Clear the DTCs.


      1. Body Electrical > Main Body > Clear DTCs


    3. After 10 seconds have elapsed, check if the same DTC is output again.


      1. Body Electrical > Main Body > Trouble Codes


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

  2. Click here

    CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. Disconnect the O2*1 or N2*2 multiplex network master switch assembly connector.


      • *1: for LHD

      • *2: for RHD

    2. Clear the DTCs.


      1. Body Electrical > Main Body > Clear DTCs


    3. After 10 seconds have elapsed, check if the same DTC is output again.


      1. Body Electrical > Main Body > Trouble Codes


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

  3. Click here

    CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)


    1. Disconnect the N7*1 or O6*2 power window regulator motor assembly (front passenger door) connector.


      • *1: for LHD

      • *2: for RHD

    2. Clear the DTCs.


      1. Body Electrical > Main Body > Clear DTCs


    3. After 10 seconds have elapsed, check if the same DTC is output again.


      1. Body Electrical > Main Body > Trouble Codes


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

  4. Click here

    CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)


    1. Disconnect the P6 power window regulator motor assembly (rear RH door) connector.

    2. Clear the DTCs.


      1. Body Electrical > Main Body > Clear DTCs


    3. After 10 seconds have elapsed, check if the same DTC is output again.


      1. Body Electrical > Main Body > Trouble Codes


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

  5. Click here

    CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)


    1. Disconnect the Q6 power window regulator motor assembly (rear LH door) connector.

    2. Clear the DTCs.


      1. Body Electrical > Main Body > Clear DTCs


    3. After 10 seconds have elapsed, check if the same DTC is output again.


      1. Body Electrical > Main Body > Trouble Codes


      Result
      Result Proceed to
      DTC B2325 is output (w/ Panoramic Moon Roof System) A
      DTC B2325 is output (w/o Panoramic Moon Roof System) B
      DTC B2325 is not output C

  6. Click here

    CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)


    1. Disconnect the q1 sliding roof ECU (sliding roof drive gear assembly) connector.

    2. Clear the DTCs.


      1. Body Electrical > Main Body > Clear DTCs


    3. After 10 seconds have elapsed, check if the same DTC is output again.


      1. Body Electrical > Main Body > Trouble Codes


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

  7. Click here

    CHECK ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY)


    1. Disconnect the q2 roof sunshade ECU (sliding roof drive gear assembly) connector.

    2. Clear the DTCs.


      1. Body Electrical > Main Body > Clear DTCs


    3. After 10 seconds have elapsed, check if the same DTC is output again.


      1. Body Electrical > Main Body > Trouble Codes


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

  8. Click here

    CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - EACH ECU)


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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3D-25 - Body ground Always 10 kΩ or higher

    3. Disconnect all other connectors in the same circuit.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3D-25 - Other terminals Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (w/ Panoramic Moon Roof System) A
      OK (w/o Panoramic Moon Roof System) B
      NG C

  9. Click here

    CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - EACH ECU)


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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3B-17 - Body ground Always 10 kΩ or higher
      3B-17 - Other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. Click here

    INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly.

      Click here

    2. B006XHWC08
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

      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.

      Tip:

      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
      3D-25 - 3B-3 Always 10 kΩ or higher
      MB-16 (LIN2) - Other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

  11. Click here

    CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.

    2. B0071PCC01
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 *b Waveform 1

      Connect all instrument panel junction block assembly connectors other than 3B and 3D.

    3. Using a GTS, check the waveform.

      Tip:

      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).

      OK
      Tester Connection Condition Tool Setting Specified Condition
      3D-25 - Body ground Ignition switch ON 2 V/DIV., 200 ms/DIV.

      Pulse generation

      (See waveform 1)
      3B-17 - Body ground* Ignition switch ON 2 V/DIV., 200 ms/DIV.

      Pulse generation

      (See waveform 1)

      • *: w/ Panoramic Moon Roof System

      Result
      Proceed to
      OK
      NG

    • OK

      USE SIMULATION METHOD TO CHECKClick here

    • NG

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

  12. Click here

    CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR))


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

      Standard Resistance
      Table 1. for LHD
      Tester Connection Condition Specified Condition
      O2-16 (LIN2) - Body ground Always 10 kΩ or higher
      O2-16 (LIN2) - Other terminals Always 10 kΩ or higher
      Table 2. for RHD
      Tester Connection Condition Specified Condition
      N2-16 (LIN2) - Body ground Always 10 kΩ or higher
      N2-16 (LIN2) - Other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR