Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM10000000249GX
Model Year Start: 2023 Model: Camry Prod Date Range: [08/2022 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2790; ID BOX EEPROM Malfunction; 2023 - 2024 MY Camry [08/2022 -        ]

DTC

B2790

ID BOX EEPROM Malfunction

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

ID BOX EEPROM Malfunction

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 engine switch is turned off or on (IG) 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

  • Engine starting: Engine cannot be started next time
  • Engine stopped: Engine cannot be started

-

Related Data List and Active Test

DTC No.

Data List and Active Test

B2790

-

CAUTION / NOTICE / HINT

NOTICE:

  • When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
  • The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here 2023 - 2024 MY Camry [08/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before replacing the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU), refer to Registration.

    Click here 2023 - 2024 MY Camry [08/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

1.

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

(a) Replace the ID code box (immobiliser code ECU) with a new one.

Click here 2023 - 2024 MY Camry [08/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ID CODE BOX: REMOVAL

HINT:

Refer to Registration.

Click here 2023 - 2024 MY Camry [08/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION

NEXT

2.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Smart Key > Clear DTCs

NEXT

3.

REGISTER RECOGNITION CODES

(a) Register the recognition codes to the ECUs.

HINT:

Refer to Registration.

Click here 2023 - 2024 MY Camry [08/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION

NEXT

4.

REGISTER ECU COMMUNICATION ID (ID CODE BOX (IMMOBILISER CODE ECU) - ECM)

(a) Register the ECU communication ID codes.

HINT:

Refer to Registration.

Click here 2023 - 2024 MY Camry [08/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION

NEXT

5.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Smart Key > Trouble Codes

HINT:

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

Result

Proceed to

DTC B2790 is not output.

A

DTC B2790 is output.

B

A

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

B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)