AUDIO AND VISUAL SYSTEM, Diagnostic DTC:B1556

DTC Code DTC Name
B1556 Extension Module Malfunction 2

DESCRIPTION

These DTCs are stored when a malfunction occurs in the Navigation ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1556 Extension Module Malfunction 2

When any of the following conditions is met:


  • Internal hard drive malfunction

  • EEPROM error

  • Storage malfunction

Navigation ECU

CAUTION / NOTICE / HINT

Note

hen replacing the navigation ECU, always replace it with a new one.

If a navigation ECU which was installed to another vehicle is used, the following may occur:


  • A communication malfunction DTC may be stored.

  • The navigation ECU may not operate normally.

PROCEDURE


  1. CHECK DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Navigation System > Clear DTCs
    2. Recheck for DTCs and check that no DTCs are output.

      Click here


      Body Electrical > Navigation System > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK
    NG