LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2323

DTC Code DTC Name
B2323 Rear Door RH ECU Communication Stop

DESCRIPTION

This DTC is stored when LIN communication between the rear power window regulator motor assembly RH and main body ECU (multiplex network body ECU) stops for more than 10 seconds.

DTC No. DTC Detection Condition Trouble Area
B2323 No communication between rear power window regulator motor assembly RH and main body ECU (multiplex network body ECU) for more than 10 seconds.

  • Rear power window regulator motor assembly RH

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Wire harness or connector

  • RR DOOR fuse

WIRING DIAGRAM

A01NHTBE14

INSPECTION PROCEDURE

Note


  • When the rear power window regulator motor assembly RH 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.

      A01NGJME04

    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-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)

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR


    1. A01NFS8E04
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)
      *2

      Front view of wire harness connector

      (to Rear Power Window Regulator Motor Assembly RH)

      Disconnect the K2 rear power window regulator motor assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2D-27 (LIN2) - K2-9 (LIN) Always Below 1 Ω
      2D-27 (LIN2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR


    1. A01NDL5E16
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Rear Power Window Regulator Motor Assembly RH)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K2-2 (B) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K2-1 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE REAR POWER WINDOW REGULATOR MOTOR RH


    1. Replace the rear power window regulator motor assembly RH Click here.


    NEXT

  5. CHECK DTC OUTPUT


    1. Clear the DTC Click here.

    2. Check for DTCs.

      OK
      DTC B2323 is not output.

    NG

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

    OK

    END (REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH WAS DEFECTIVE)