DTC    B2790    ID BOX EEPROM Malfunction

for Preparation Click here


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 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)
  2. Certification ECU (smart key ECU assembly)
An immobiliser set/unset operation is performed (the power switch is turned off or on (IG) while carrying the key).
  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
  1. Power switch on (READY): Hybrid control system cannot be started next time
  2. Hybrid control system stopped: Hybrid control system cannot be started
-

Related Data List and Active Test 
DTC Code
Data List and Active Test
B2790
-

INSPECTION PROCEDURE

NOTICE:
  1. Before replacing the certification ECU (smart key ECU assembly), refer to the Service Bulletin.
  2. After performing repair, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

1.REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

  1. Replace the ID code box (immobiliser code ECU).


NEXT


2.CLEAR DTC

  1. Clear the DTCs (Click here).


NEXT


3.REGISTER RECOGNITION CODES

  1. Register the recognition codes in the ECUs.


NEXT


4.REGISTER ECU COMMUNICATION ID

  1. Register the ECU communication ID.


NEXT


5.CHECK FOR DTC

  1. Check for DTCs (Click here).

    HINT:
    Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

    OK:
    DTC B2790 is not output.



NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
OK

END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE)