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Home >> Lexus >> 2021 >> UX 200 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Navigation System (Diagnostic Codes) (1 Of 2) >> Navigation System >> DTC B1556: Extension Module Malfunction 2 [10/2019 - 07/2022] >> Description

DTC B1556: Extension Module Malfunction 2 [10/2019 - 07/2022]: 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