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

  • Double lock door control relay assembly*1

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Wire harness or connector

WIRING DIAGRAM

A0041XNE03

INSPECTION PROCEDURE

Note


  • When a power window regulator motor assembly is replaced or removed and reinstalled, it requires initialization Click here.

  • When using the GTS to troubleshoot with the power switch off:

    Connect the GTS to the DLC3, and turn the courtesy switch on and off at 1.5-second intervals until communication between the GTS and vehicle begins.

PROCEDURE


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


    1. Disconnect the O7*1 or N4*2 multiplex network master switch connector.

    2. Disconnect the O2*1 or N2*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

      O7-16 (LIN2) - O2-9 (LIN)*1

      N4-16 (LIN2) - N2-9 (LIN)*2

      		 Always Below 1 Ω

      O7-16 (LIN2) - Body ground*1

      N4-16 (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. A0040LQE06
      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.

      A0041C3E04

    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 ASSEMBLY - EACH ECU)


    1. Disconnect the N2*1, O2*2, L16*3, P4 and Q4 connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2D-26 (LIN2) - Q4-9 (LIN) Always Below 1 Ω
      2A-27 (LIN2) - P4-9 (LIN) Always Below 1 Ω

      2A-27 (LIN2) - O7-17 (LIN1)*1

      2A-27 (LIN2) - N4-17 (LIN1)*2

      		 Always Below 1 Ω

      2A-27 (LIN2) - N2-9 (LIN)*1

      2A-27 (LIN2) - O2-9 (LIN)*2

      		 Always Below 1 Ω
      2A-27 (LIN2) - L16-9 (MPX1)*3 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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Reconnect the O7*1, N4*2, L16*3, 2A, 2D, P4, O2 and N2 connectors.


      • *1: for LHD

      • *2: for RHD

      • *3: w/ Double Locking System

    2. Clear the DTC Click here.

    3. After 10 seconds have elapsed, check if the DTC is stored 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 Q4 connector.

    2. Disconnect the O7*1 or N4*2 connector.


      • *1: for LHD

      • *2: for RHD

    3. Clear the DTC Click here.

    4. After 10 seconds have elapsed, check if the DTC is stored 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 O7*1 or N4*2 connector.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the P4 connector.

    3. Clear the DTC Click here.

    4. After 10 seconds have elapsed, check if the DTC is stored 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 P4 connector.

    2. Disconnect the O2*1 or N2*2 connector.


      • *1: for LHD

      • *2: for RHD

    3. Clear the DTC Click here.

    4. After 10 seconds have elapsed, check if the DTC is stored 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 N2*1 or O2*2 connector.

    2. Disconnect the N2*1 or O2*2 connector.


      • *1: for LHD

      • *2: for RHD

    3. Clear the DTC Click here.

    4. After 10 seconds have elapsed, check if the DTC is stored 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 POWER WINDOW REGULATOR MOTOR ASSEMBLY (for FRONT PASSENGER SIDE) Click here

    A

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


    1. Disconnect the L16 connector.

    2. Clear the DTC Click here.

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

    4. 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