NAVIGATION SYSTEM, Diagnostic DTC:B15F9

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

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

WIRING DIAGRAM

A01ENV7E18

INSPECTION PROCEDURE

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK DTC


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

      OK
      No DTCs are output.

    NG

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

    OK

    USE SIMULATION METHOD TO CHECK Click here

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


    1. Disconnect the F76 multi-media module receiver assembly connector.

    2. Disconnect the F78 multi-display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F76-36 (UPSW) - F78-3 (UPSW) Always Below 1 Ω
      F76-35 (UIND) - F78-4 (UIND) Always Below 1 Ω
      F76-36 (UPSW) - Body ground Always 10 kΩ or higher
      F76-35 (UIND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE MULTI-DISPLAY ASSEMBLY


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


    NEXT

  5. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  6. CHECK DTC


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

      OK
      No DTCs are output.

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY Click here

    OK

    END (MULTI-DISPLAY ASSEMBLY IS DEFECTIVE)