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.

  • Power window regulator motor assembly (for driver side)

  • Power window regulator motor assembly (for front passenger side)

  • Power window regulator motor assembly (for rear RH side)

  • Power window regulator motor assembly (for rear LH side)

  • Multiplex network master switch assembly

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

  • Double lock door control relay assembly*2

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Wire harness or connector

WIRING DIAGRAM

A003VG6E07

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 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. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR (DRIVER SIDE) - MASTER SWITCH)


    1. Disconnect the K5*1 or J9*2 multiplex network master switch connector.

    2. Disconnect the K2*1 or J2*2 power window regulator motor (for driver side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      K5-16 (LIN2) - K2-9 (LIN)*1

      J9-16 (LIN2) - J2-9 (LIN)*2

      		 Always Below 1 Ω

      K5-16 (LIN2) - Body ground*1

      J9-16 (LIN2) - Body ground*2

      		 Always 10 kΩ or higher

      • *1: for LHD

      • *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. A003XCUE07
      Text in Illustration
      *a

      Component without harness connected

      (Multiplex Network Master Switch Assembly)

      Remove the multiplex network master switch assembly Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      16 (LIN2) - 17 (LIN1) Always Below 1 Ω
      16 (LIN2) - Body ground Always 10 kΩ or higher

    NG

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    OK

  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


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

      A003WI7E06

    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
      2D-26 (LIN2) - MB-16 (LIN2) Always Below 1 Ω
      2A-27 (LIN2) - MB-16 (LIN2) Always Below 1 Ω
      2A-27 (LIN2) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 *b

      Component without harness connected

      (Instrument Panel Junction Block Assembly)
      *c

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 - -

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (INSTRUMENT JUNCTION BLOCK - EACH ECU)


    1. Disconnect the J2*1, K2*2, H140*3, T10*4, L2 and M2 connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2D-26 (LIN2) - M2-9 (LIN) Always Below 1 Ω
      2A-27 (LIN2) - L2-9 (LIN) Always Below 1 Ω

      2A-27 (LIN2) - K5-17 (LIN1)*1

      2A-27 (LIN2) - J9-17 (LIN1)*2

      		 Always Below 1 Ω

      2A-27 (LIN2) - J2-9 (LIN)*1

      2A-27 (LIN2) - K2-9 (LIN)*2

      		 Always Below 1 Ω
      2A-27 (LIN2) - H140-9 (MPX1)*3 Always Below 1 Ω
      2A-27 (LIN2) - T10-4 (LIN)*4 Always Below 1 Ω
      2D-26 (LIN2) - Body ground Always 10 kΩ or higher
      2A-27 (LIN2) - Body ground Always 10 kΩ or higher

      • *1: for LHD

      • *2: for RHD

      • *3: w/ Double Locking System

      • *4: w/ Sliding Roof System


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for REAR LH SIDE))


    1. Reconnect the K5*1, J9*2, H140*3, 2A, 2D, T10*4, L2, K2 and J2 connectors.


      • *1: for LHD

      • *2: for RHD

      • *3: w/ Double Locking System

      • *4: w/ Sliding Roof System

    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

    B

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for REAR LH SIDE) Click here

    A

  6. CHECK DTC OUTPUT (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)


    1. Reconnect the M2 connector.

    2. Disconnect the K5*1 or J9*2 connector.


      • *1: for LHD

      • *2: for RHD

    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 MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    A

  7. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for REAR RH SIDE))


    1. Reconnect the K5*1 or J9*2 connector.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the L2 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 POWER WINDOW REGULATOR MOTOR ASSEMBLY (for REAR RH SIDE) Click here

    A

  8. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for DRIVER SIDE))


    1. Reconnect the L2 connector.

    2. Disconnect the K2*1 or J2*2 connector.


      • *1: for LHD

      • *2: for RHD

    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 POWER WINDOW REGULATOR MOTOR ASSEMBLY (for DRIVER SIDE) Click here

    A

  9. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for FRONT PASSENGER SIDE))


    1. Reconnect the K2*1 or J2*2 connector.

    2. Disconnect the J2*1 or K2*2 connector.


      • *1: for LHD

      • *2: for RHD

    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 (w/ Sliding Roof System) A
      DTC B2325 is output (w/ Double Locking System and w/o Sliding Roof System) B
      DTC B2325 is output (w/o Double Locking System and w/o Sliding Roof System) C
      DTC B2325 is not output D

    B

    CHECK DTC OUTPUT (DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY) Click here

    C

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

    D

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for FRONT PASSENGER SIDE) Click here

    A

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


    1. Reconnect the J2*1 or K2*2 connector.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the T10 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 (w/ Double Locking System) A
      DTC B2325 is output (w/o Double Locking System) B
      DTC B2325 is not output C

    B

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

    C

    REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) Click here

    A

  11. CHECK DTC OUTPUT (DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY)


    1. w/ Sliding Roof System:

      Reconnect the T10 connector.

    2. w/o Sliding Roof System:

      Reconnect the J2*1 or K2*2 connector.


      • *1: for LHD

      • *2: for RHD

    3. Disconnect the H140 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

    B

    REPLACE DOUBLE LOCK DOOR CONTROL RELAY ASSEMBLY Click here

    A

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