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DTC B2790-46: ID-BOX Calibration / Parameter Memory Failure [07/2020 - ]: Description

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B2790-46	ID-BOX Calibration / Parameter Memory Failure	An internal malfunction occurs in the ID code box (immobiliser code ECU) (EEPROM access malfunction) (1 trip detection logic*).	ID code box (immobiliser code ECU) Certification ECU (smart key ECU assembly)	DTC output confirmation operation: An immobiliser set/unset operation is performed (the ignition switch is turned off or to ON while the electrical key transmitter sub-assembly is being carried).

*: 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
Ignition switch ON (READY): 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 No.	Data List and Active Test
B2790-46	-