NAVIGATION 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

The following malfunctions may occur if a navigation ECU from another vehicle is installed to this vehicle. Therefore, when replacing the navigation ECU, be sure to replace it with new one.


  • Communication malfunction DTC is output

  • Does 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

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE NAVIGATION ECU Click here