DTC B2790-46: ID-BOX Calibration / Parameter Memory 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.
- REPLACE ID CODE BOX (IMMOBILIZER CODE ECU)
- Replace the ID code box (immobilizer code ECU) with a new one.
HINT:
Refer to REMOVAL [09/2023 - ]
Result
Proceed to NEXT
Result:
NEXT
See step 2
- Replace the ID code box (immobilizer code ECU) with a new one.
- CLEAR DTC
Result:
NEXT
See step 3
- REGISTER RECOGNITION CODE
- Register the recognition codes to the ECUs.
Refer to REGISTRATION [09/2023 - ]
Result
Proceed to NEXT
Result:
NEXT
See step 4
- Register the recognition codes to the ECUs.
- REGISTER ECU COMMUNICATION ID
- Register the ECU communication ID codes.
Refer to REGISTRATION [09/2023 - ]
Result
Proceed to NEXT
Result:
NEXT
See step 5
- Register the ECU communication ID codes.
- CHECK DTC
- Using the GTS, check if DTC is output.
Body Electrical > Smart Access > Trouble Codes
Result
Result Proceed to B2790-46 is output A B2790-46 is not output B
Result:
A
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL [09/2023 - 12/2023] , or refer to REMOVAL [12/2023 - ]
Result:
B
END (ID CODE BOX (IMMOBILIZER CODE ECU) WAS DEFECTIVE)
- Using the GTS, check if DTC is output.