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NAVIGATION SYSTEM, Diagnostic DTC:B15F8

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DTC Code DTC Name
B15F8 D-Seat ECU Vehicle Information Reading/Writing Process Malfunction
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DESCRIPTION

This DTC is stored when items controlled by the main body ECU (multiplex network body ECU) cannot be customized via the navigation system vehicle customization screen.

Tip:

The main body ECU (multiplex network body ECU) controls the front power seat control system (w/ Memory) related items that are customizable via the multi-display assembly screen.

DTC No. Detection Item DTC Detection Condition Trouble Area
B15F8 D-Seat ECU Vehicle Information Reading/Writing Process Malfunction Main body ECU (multiplex network body ECU) vehicle setting processing malfunction

  • CAN communication system

  • Front power seat control system (w/ Memory)

  • Main body ECU (multiplex network body ECU)

  • Radio and display receiver assembly
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CAUTION / NOTICE / HINT

Note:

  • When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:


    • A communication malfunction DTC may be stored.

    • The radio and display receiver assembly may not operate normally.

  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.

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  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.


  • The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing this troubleshooting procedure, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

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    • *: w/ Door Control Battery

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PROCEDURE


  1. Click here

    CHECK CAN COMMUNICATION SYSTEM


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

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      OK
      CAN communication DTCs are not output.
      Result
      Proceed to
      OK
      NG

  2. Click here

    CHECK FRONT POWER SEAT CONTROL SYSTEM (w/ Memory)


    1. Check if the front power seat control system (w/ Memory) is malfunctioning.

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      Tip:

      Customization may not be possible depending on the malfunction in the front power seat control system (w/ Memory).

      OK
      No malfunctions are present in the front power seat control system (w/ Memory).
      Result
      Proceed to
      OK
      NG

  3. Click here

    CHECK CUSTOMIZE ITEMS


    1. Display the "Vehicle customization" screen.

    2. Make a note of the customizable items for each main body ECU (multiplex network body ECU).

      Tip:

      The items shown as customizable via the navigation system vehicle customization screen can also be changed using the GTS. In the following step, the GTS will be used.


      1. To match-up the items on the multi-display assembly with the items on the GTS, check the customize parameters list for the front power seat control system (w/ Memory) related items that can be customized via the multi-display assembly screen.

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    3. Using the GTS, confirm that it is possible to change the settings of the customize parameters that are available for customization via the multi-display assembly screen.

      OK
      The items available for customization via the multi-display assembly screen can be customized successfully using the GTS.
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLYClick here

    • NG

      REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)Click here