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 3 times in a row.

  • Front power window regulator motor assembly LH

  • Front power window regulator motor assembly RH

  • Rear power window regulator motor assembly RH

  • Rear power window regulator motor assembly LH

  • Multiplex network master switch assembly

  • Sliding roof ECU (sliding roof drive gear assembly)*1

  • Roof sunshade ECU (sliding roof drive gear sub-assembly)*2

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Wire harness or connector

WIRING DIAGRAM

A01NHGKE01

INSPECTION PROCEDURE

Note


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

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

  • When a power 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. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. Remove the instrument panel junction block assembly Click here.

      A01NG5AE01

    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
      2H-25 (LIN2) - MB-16 (LIN2) Always Below 1 Ω
      2D-27 (LIN2) - MB-16 (LIN2) Always Below 1 Ω
      2D-27 (LIN2) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 *2

      Component without harness connected

      (Instrument Panel Junction Block Assembly)
      *3

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR


    1. Disconnect the J7*1, I12*2, F84, L2, T2, J1, K2 and I2 connectors.

      A01NFM2E01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2H-25 (LIN2) - L2-9 (LIN) Always Below 1 Ω
      2D-27 (LIN2) - T2-4 (LIN) Always Below 1 Ω
      2D-27 (LIN2) - K2-9 (LIN) Always Below 1 Ω
      2D-27 (LIN2) - J7-17 (LIN1)*1 Always Below 1 Ω
      2D-27 (LIN2) - I12-17 (LIN1)*2 Always Below 1 Ω
      2D-27 (LIN2) - I2-9 (LIN) Always Below 1 Ω
      2D-27 (LIN2) - J1-9 (LIN) Always Below 1 Ω
      2D-27 (LIN2) - F84-9 (LIN) Always Below 1 Ω
      2H-25 (LIN2) - Body ground Always 10 kΩ or higher
      2D-27 (LIN2) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

      		 *2

      Front view of wire harness connector

      (to Multiplex Network Master Switch Assembly)
      *3

      Front view of wire harness connector

      (to Front Power Window Regulator Motor Assembly RH)

      		 *4

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)
      *5

      Front view of wire harness connector

      (to Sliding Roof ECU (Sliding Roof Driver Gear Assembly))

      		 *6

      Front view of wire harness connector

      (to Roof Sunshade ECU (Sliding Roof Driver Gear Sub-assembly))
      *7

      Front view of wire harness connector

      (to Front Power Window Regulator Motor Assembly LH)

      		 *8

      Front view of wire harness connector

      (to Double Lock Door Control Relay Assembly)
      *9

      Front view of wire harness connector

      (to Rear Power Window Regulator Motor Assembly RH)

      		 *10

      Front view of wire harness connector

      (to Rear Power Window Regulator Motor Assembly LH)
      *11 for LHD *12 for RHD

      • *1: LHD

      • *2: RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK DTC OUTPUT (REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH)


    1. Reconnect the J7*1, I12*2, F84, 2H, 2D, T2, K2, J1 and I2 connectors.

    2. Clear the DTC 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

      • *1: for LHD

      • *2: for RHD


    B

    REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    A

  4. CHECK DTC OUTPUT (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY))


    1. Reconnect the L2 connector.

    2. Disconnect the T2 connector.

    3. Clear the DTC 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 SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) Click here

    A

  5. CHECK DTC OUTPUT (MULTIPLEX NETWORK MASTER SWITCH)


    1. Reconnect the T2 connector.

    2. Disconnect the J7*1 connector.

    3. Disconnect the I12*2 connector.

    4. Clear the DTC Click here.

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

    6. Check for DTCs again.

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

      • *1: for LHD

      • *2: for RHD


    B

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    A

  6. CHECK DTC OUTPUT (REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH)


    1. Reconnect the J7*1 connector.

    2. Reconnect the I12*2 connector.

    3. Disconnect the K2 connector.

    4. Clear the DTC Click here.

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

    6. Check for DTCs again.

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

      • *1: for LHD

      • *2: for RHD


    B

    REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    A

  7. CHECK DTC OUTPUT (FRONT POWER WINDOW REGULATOR MOTOR LH)


    1. Reconnect the K2 connector.

    2. Disconnect the J1 connector.

    3. Clear the DTC 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 POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    A

  8. CHECK DTC OUTPUT (FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH)


    1. Reconnect the J1 connector.

    2. Disconnect the I2 connector.

    3. Clear the DTC 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 POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    A

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