LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2321

DTC Code DTC Name
B2321 Driver Side Door ECU Communication Stop

DESCRIPTION

This DTC is stored when LIN communication between the power window regulator motor assembly (for driver side) and main body ECU (driver side junction block assembly) stops for more than 10 seconds.

DTC No. DTC Detection Condition Trouble Area
B2321 No communication between the power window regulator motor assembly (for driver side) and main body ECU (driver side junction block assembly) for more than 10 seconds.

  • Power window regulator motor assembly (for Driver side)

  • Main body ECU (Driver side junction block assembly)

  • Multiplex network master switch assembly

  • Wire harness or connector

  • FL DOOR fuse

WIRING DIAGRAM

A01EIOSE08

INSPECTION PROCEDURE

Note


  • When the power window regulator motor assembly (for driver side) is replaced or removed and reinstalled, it requires initialization Click here.

  • When using the GTS to troubleshoot with the ignition 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 DTC OUTPUT


    1. Clear the DTC Click here.

    2. Recheck for DTCs.

      Result
      Result Proceed to
      Only DTC B2321 is output. A
      DTC B1206 and B2321 are output simultaneously. B

      Tech Tips

      When DTC B1206 and B2321 are output simultaneously, perform troubleshooting for DTC B1206 first.


    B

    GO TO DTC B1206 Click here

    A

  2. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR - BATTERY AND BODY GROUND)


    1. A01EMJSE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Window Regulator Motor Assembly (for Driver Side))

      Disconnect the I4 motor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I4-1 (GND) - Body ground Always Below 1 Ω
      Standard Voltage
      Tester Connection Condition Specified Condition
      I4-2 (B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (MASTER SWITCH - POWER WINDOW REGULATOR MOTOR ASSEMBLY)


    1. A01EKECE12
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Multiplex Network Master Switch Assembly)
      *2

      Front view of wire harness connector

      (to Power Window Regulator Motor Assembly (for Driver Side))

      Disconnect the I6 switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I6-16 (LIN2) - I4-9 (LIN) Always Below 1 Ω
      I6-16 (LIN2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. A01ELLQE02
      Text in Illustration
      *1

      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

    NG

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    OK

  5. REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for DRIVER SIDE)


    1. Replace the power window regulator motor assembly (for driver side) Click here.


    NEXT

  6. CHECK DTC OUTPUT


    1. Clear the DTC Click here.

    2. Recheck for DTCs.

      OK
      DTC B2321 is not output.

    NG

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here

    OK

    END (POWER WINDOW REGULATOR MOTOR ASSEMBLY WAS DEFECTIVE)