NAVIGATION SYSTEM(for Radio and Display Type), Diagnostic DTC:B15F7

DTC Code DTC Name
B15F7 Certification ECU Vehicle Information Reading/Writing Process Malfunction

DESCRIPTION

This DTC is stored when items controlled by the certification ECU (smart key ECU assembly) cannot be customized via the navigation system vehicle customization screen.

Tech Tips

The certification ECU (smart key ECU assembly) controls the entry and start system (for Entry Function) related items that are customizable via the radio and display receiver assembly screen.

DTC No. Detection Item DTC Detection Condition Trouble Area
B15F7 Certification ECU Vehicle Information Reading/Writing Process Malfunction Certification ECU (smart key ECU assembly) vehicle setting processing error.

  • CAN communication system

  • Entry and start system (for Entry Function)

  • Certification ECU (smart key ECU assembly)

  • Radio and display receiver assembly

CAUTION / NOTICE / HINT

Note

Check that the wire harness is properly installed and does not have any sharp bends, pinching or loose connections.

Click here

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Use the GTS to check if the CAN communication system is functioning normally.

      for LHD:

      Click here

      for RHD:

      Click here

      OK
      CAN communication DTCs are not output.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK ENTRY AND START SYSTEM (for Entry Function)


    1. Check if the entry and start system (for Entry Function) is malfunctioning.

      Click here

      Tech Tips

      Customization may not be possible depending on the malfunction in the entry and start system (for Entry Function).

      OK
      No malfunctions are present in the entry and start system (for Entry Function).
      Result
      Proceed to
      OK
      NG

    NG

    GO TO ENTRY AND START SYSTEM (for Entry Function) Click here

    OK

  3. CHECK CUSTOMIZE ITEMS


    1. Display the "Vehicle Customization" screen.

    2. Make a note of the customizable items for each certification ECU (smart key ECU assembly) related system.

      Tech Tips

      These items shown as customizable via the navigation system vehicle customization screen can also be changed manually. In a following step, a manual procedure will be used.


      1. Check the customize parameters list for the entry and start system (for Entry Function) related items that can be customized via the radio and display receiver assembly screen.

        Click here

    3. Manually change and confirm that it was possible to successfully change the settings of the customize parameters for each system that are available for customization via the radio and display receiver assembly screen.

      OK
      The items available for customization via the radio and display receiver assembly screen can be customized successfully using the manual procedure.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)