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DTC B2790-46: ID-BOX Calibration / Parameter Memory Failure [11/2023 - ]: Description

When an internal malfunction occurs in the ID code box (immobilizer 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 (immobilizer code ECU) (EEPROM access malfunction) (1 trip detection logic*).
  • ID code box (immobilizer code ECU)
  • Certification ECU (smart key ECU assembly)
 DTC output confirmation operation: 
  1. An immobilizer set/unset operation is performed (the ignition switch is turned off or to ON while the electrical key transmitter sub-assembly 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
  • Ignition switch ON: Engine cannot be started next time
  • Engine stopped: Engine cannot be started
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RELATED DATA LIST AND ACTIVE TEST

DTC No. Data List and Active Test
B2790-46 -
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