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LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2322

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DTC Code DTC Name
B2322 Front Passenger Side Door ECU Communication Stop
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DESCRIPTION

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

DTC No. DTC Detection Condition Trouble Area
B2322 No communication between power window regulator motor assembly (for front passenger door) and main body ECU (multiplex network body ECU) for 10 seconds or more.

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

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Wire harness or connector

  • DOOR F/R fuse*1

  • DOOR F/L fuse*2

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

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

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

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PROCEDURE


  1. Click here

    INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY


    1. A0003NQE01

      Remove the instrument panel junction block assembly (Click here).

    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.

      Tip:

      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
      3B-30 (LIN2) - MB-16 (LIN2) Always Below 1 Ω
      Table 1. Text in Illustration
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      		 *b

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

  2. Click here

    CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - POWER WINDOW REGULATOR MOTOR)


    1. Disconnect the L9*1 or M8*2 power window regulator motor assembly (for front passenger door) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Table 2. for LHD
      Tester Connection Condition Specified Condition
      3B-30 (LIN2) - L9-9 (LIN) Always Below 1 Ω
      3B-30 (LIN2) - Body ground Always 10 kΩ or higher
      Table 3. for RHD
      Tester Connection Condition Specified Condition
      3B-30 (LIN2) - M8-9 (LIN) Always Below 1 Ω
      3B-30 (LIN2) - Body ground Always 10 kΩ or higher

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. Click here

    CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR - AUXILIARY BATTERY, BODY GROUND)


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

      Standard Voltage
      Table 4. for LHD
      Tester Connection Condition Specified Condition
      L9-2 (B) - Body ground Power switch off 11 to 14 V
      Table 5. for RHD
      Tester Connection Condition Specified Condition
      M8-2 (B) - Body ground Power switch off 11 to 14 V

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

      Standard Resistance
      Table 6. for LHD
      Tester Connection Condition Specified Condition
      L9-1 (GND) - Body ground Always Below 1 Ω
      Table 7. for RHD
      Tester Connection Condition Specified Condition
      M8-1 (GND) - Body ground Always Below 1 Ω

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. Click here

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR FRONT PASSENGER DOOR)


    1. Replace the power window regulator motor assembly (for front passenger door) (Click here).


  5. Click here

    CHECK DTC OUTPUT


    1. Clear the DTCs (Click here).

    2. Check for DTCs.

      OK
      DTC B2322 is not output.

    • OK

      END (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR FRONT PASSENGER DOOR) WAS DEFECTIVE)

    • NG

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