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LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2405

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DTC Code DTC Name
B2405 Sub Bus LIN Module Communication Malfunction
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DESCRIPTION

This DTC is output when LIN communication between the luggage room junction block (rear junction block ECU) and map light assembly stops for 10 seconds or more.

DTC Code DTC Detection Condition Trouble Area
B2405 No communication between luggage room junction block (rear junction block ECU) and map light assembly for 10 seconds or more

  • Map light assembly

  • Luggage room junction block (rear junction block ECU)

  • Harness or connector
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WIRING DIAGRAM

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INSPECTION PROCEDURE

Note:

  • When using the intelligent tester with the power switch off to troubleshoot:

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

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

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PROCEDURE


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    CHECK HARNESS AND CONNECTOR (REAR JUNCTION BLOCK ECU - MAP LIGHT)


    1. Disconnect the S62 ECU connector.

    2. Disconnect the X6 map light connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      S62-9 (LIN) - X6-2 (LIN) Always Below 1 Ω
      S62-9 (LIN) or X6-2 (LIN) - Body ground Always 10 kΩ or higher
      Standard voltage
      Tester Connection Condition Specified Condition
      S62-9 (LIN) or X6-2 (LIN) - Body ground Always Below 1 V

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    CHECK HARNESS AND CONNECTOR (MAP LIGHT - BATTERY AND BODY GROUND)


    1. A01GYH9E02

      Disconnect the X4 map light connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      X4-16 (GND9) - Body ground Always Below 1 Ω
      Standard voltage
      Tester Connection Switch Condition Specified Condition
      X4-6 (+B) - Body ground Power switch on (IG) 11 to 14 V

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    CHECK MAP LIGHT ASSEMBLY (OPERATION)


    1. Temporarily the replace map light assembly with a new or normally functioning one (see pageClick here).

    2. Clear the DTC (see pageClick here).


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    CHECK FOR DTC


    1. Recheck for DTC (see pageClick here).

      Table 1. Result:
      Result Proceed to
      DTC B2405 output does not reoccur A
      DTC B2405 output reoccurs B

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPLACE LUGGAGE ROOM JUNCTION BLOCK (REAR JUNCTION BLOCK ECU)

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    END (MAP LIGHT ASSEMBLY IS DEFECTIVE)