DTC U0233: Lost Communication with Blind Spot Monitor Master Module [06/2018 - ]: Procedure
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 250, 2023 Lexus ES 350, 2023 Lexus ES 250, and 2022 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK DTC OUTPUT
- Turn the engine switch off.
- Turn the engine switch on (IG).
- Clear the DTCs.
Body Electrical > Blind Spot Monitor Slave > Clear DTCs
- Check for DTCs.
Body Electrical > Blind Spot Monitor Slave > Trouble Codes
Result
Result Proceed to DTC U0233 is output A No DTCs are output B
Result:
B
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]
Result:
A
See step 2
- REPLACE BLIND SPOT MONITOR SENSOR RH
Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]
Result
Proceed to NEXT Result:
NEXT
See step 3
- CHECK DTC OUTPUT
- Check for DTCs.
Body Electrical > Blind Spot Monitor Slave > Trouble Codes
Result
Result Proceed to DTC U0233 is output A No DTCs are output B
Result:
A
REPLACE BLIND SPOT MONITOR SENSOR LH. Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]
Result:
B
END (BLIND SPOT MONITOR SENSOR RH WAS DEFECTIVE)
- Check for DTCs.