AUDIO AND VISUAL SYSTEM(w/o 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 multidisplay assembly, these DTCs will be stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15F9

UART Communication Malfunction(for A/C)

Multi-display for air conditioning switch operation signal input malfunction.

  • Harness or connector

  • Multi-display assembly

  • Multi-media module receiver assembly

WIRING DIAGRAM

E235206E14

PROCEDURE

  1. CLEAR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Navigation System > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

  2. CHECK FOR DTC

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

      Click here

      Body Electrical > Navigation System > Trouble Codes

      OK

      No DTCs are output.

    Result

    Proceed to

    OK

    NG
    OK

    USE SIMULATION METHOD TO CHECK

    Click hereClick here

    NG

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

    1. Disconnect the H60 multi-media module receiver assembly connector.

    2. Disconnect the H50 multi-display assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H60-2 (UPSW) - H50-2 (UPSW)

      Always

      Below 1 Ω

      H60-3 (UIND) - H50-3 (UIND)

      Always

      Below 1 Ω

      H60-2 (UPSW) - Body ground

      Always

      Below 1 Ω

      H60-3 (UIND) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE MULTI-DISPLAY ASSEMBLY

    1. Replace the multi-display assembly with a known good one.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  5. CLEAR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Navigation System > Clear DTCs

    Result

    Proceed to

    NEXT
    NEXT

  6. CHECK FOR DTC

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

      Click here

      Body Electrical > Navigation System > Trouble Codes

      OK

      No DTCs are output.

    Result

    Proceed to

    OK

    NG
    OK

    END (MULTI-DISPLAY ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY

    Click here