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NAVIGATION SYSTEM, Diagnostic DTC:B15F9

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DTC Code DTC Name
B15F9 UART Communication Malfunction(for A/C)
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DESCRIPTION

The multi-media module receiver assembly and multi-display assembly are connected by the UART communication line.

When a UART communication error occurs between the multi-media module receiver assembly and multi-display assembly, these DTCs will be stored.

DTC Code DTC Detection Condition Trouble Area
B15F9 Multi-display for air conditioning switch operation signal input malfunction.

  • Harness or connector

  • Multi-display assembly

  • Multi-media module receiver assembly
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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    CLEAR DTC


    1. Clear the DTCs (Click here).


  2. Click here

    CHECK DTC


    1. Recheck for DTCs and check if the same DTC is output again (Click here).

      OK
      No DTCs are output.

  3. Click here

    CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - MULTI-DISPLAY ASSEMBLY)


    1. Disconnect the F77 multi-media module receiver assembly connector.

    2. Disconnect the F79 multi-display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F77-36 (UPSW) - F79-3 (UPSW) Always Below 1 Ω
      F77-35 (UIND) - F79-4 (UIND) Always Below 1 Ω
      F77-36 (UPSW) - Body ground Always 10 kΩ or higher
      F77-35 (UIND) - Body ground Always 10 kΩ or higher

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    REPLACE MULTI-DISPLAY ASSEMBLY


    1. Replace the multi-display assembly with a new or normally functioning one (Click here).


  5. Click here

    CLEAR DTC


    1. Clear the DTCs (Click here).


  6. Click here

    CHECK DTC


    1. Recheck for DTCs and check if the same DTC is output again (Click here).

      OK
      No DTCs are output.

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    USE SIMULATION METHOD TO CHECKClick here

  8. Click here

    END (MULTI-DISPLAY ASSEMBLY IS DEFECTIVE)

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. Click here

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLYClick here