DTC B2790: ID BOX EEPROM Malfunction [08/2013 - ]: Description

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

When an internal malfunction occurs in the ID code box (immobiliser code ECU), the certification ECU (smart key ECU assembly) stores this DTC.

DTC Code	DTC Detection Condition	Trouble Area	DTC Output Confirmation Operation
B2790	An internal malfunction occurs in the ID code box (immobiliser code ECU) (EEPROM access malfunction) (1 trip detection logic*1).	ID code box (immobiliser code ECU) Certification ECU (smart key ECU assembly)	An immobiliser set/unset operation is performed (the power switch is turned off or on (IG) while the key is being carried).

*1: Only output while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED

Vehicle Condition when Malfunction Detected	Fail-safe Operation when Malfunction Detected
READY ON: Hybrid control system cannot be started next time Hybrid control system stopped: Hybrid control system cannot be started	-

RELATED DATA LIST AND ACTIVE TEST

DTC Code	Data List and Active Test
B2790	-