DTC B278D-96: ID-BOX Component Internal Failure [09/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+ and 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.

CLEAR DTC

Clear the DTCs.

Body Electrical > Smart Access > Clear DTCs

Result

Proceed to
NEXT

Result:

See step 2

CHECK DTC OUTPUT

Check for DTCs.

Body Electrical > Smart Access > Trouble Codes

HINT:

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

Result

Result	Proceed to
B278D-96 is not output	A
B278D-96 is output	B

Result:

END

Result:

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL [09/2023 - 12/2023] , or refer to REMOVAL [12/2023 - ]