LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2321

DTC Code DTC Name
B2321 Driver Side Door ECU Communication Stop

DESCRIPTION

This DTC is output when LIN communication between the front power window regulator motor assembly LH*1/RH*2and main body ECU (instrument panel junction block assembly) stops for more than 10 seconds.

Tech Tips

*1: for LHD

*2: for RHD

DTC No. DTC Detection Condition Trouble Area
B2321

No communication between front power window regulator motor assembly LH*1/RH*2and main body ECU (instrument panel junction block assembly) for more than 10 seconds

  • Front power window regulator motor assembly LH*1

  • Front power window regulator motor assembly RH*2

  • Main body ECU (Instrument panel junction block assembly)

  • Wire harness

WIRING DIAGRAM

A017CKGE06
A017CKGE07

INSPECTION PROCEDURE

Note

When using the intelligent tester with the ignition switch off to troubleshoot:

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - FRONT POWER WINDOW REGULATOR MOTOR LH*1/RH*2)

    Tech Tips

    *1: for LHD

    *2: for RHD

    A017B0BE01

    1. Disconnect the D8 connector.

    2. Disconnect the H1*1or G10*2connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition

      D8-10 (LIN2) - H1*1-9 (LIN)

      		 Always Below 1 Ω

      D8-10 (LIN2) - G10*2-9 (LIN)

      		 Always Below 1 Ω
      D8-10 (LIN2) - Body ground Always 10 kΩ or higher

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

      Standard voltage
      Tester Connection Condition Specified Condition
      D8-10 (LIN2) - Body ground Always Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH*1/RH*2

    Tech Tips

    *1: for LHD

    *2: for RHD


    1. A017D9EE05

      Disconnect the H1*1or G10*2connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition

      H1*1-2 (B) - Body ground

      G10*2-2 (B) - Body ground

      		 Always Below 1 Ω

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

      Standard voltage
      Tester Connection Condition Specified Condition

      H1*1-2 (B) - Body ground

      G10*2-2 (B) - Body ground

      		 Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH*1/RH*2

    Tech Tips

    *1: for LHD

    *2: for RHD


    1. Replace the front power window regulator motor assembly LH*1or RH*2with a normally-functioning or a new one Click here.

    2. Clear the DTC.


    NEXT

  4. CHECK FOR DTC


    1. Recheck for DTC.

      Result
      Result Proceed to
      B2321 is not output A
      B2321 is output B

    B

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

    A

    END