DTC U0232: Lost Communication with Blind Spot Monitor Slave Module; DTC U0233: Lost Communication with Blind Spot Monitor Master Module [06/2018 - 09/2022]: Description

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2022 Lexus ES 350, 2022 Lexus ES 250, 2021 Lexus ES 350, 2021 Lexus ES 250, and 2020 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

This DTC is stored when the blind spot monitor sensor LH judges that there is a communication problem with the blind spot monitor sensor RH.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0232	Lost Communication with Blind Spot Monitor Slave Module	The clearance warning ECU assembly cannot receive signals from the blind spot monitor sensor (slave)	Open or short in CAN bus main wire or connector Open or short in CAN bus wire or connector Open or short in No. 24 junction connector Clearance warning ECU assembly Blind spot monitor sensor LH Power source circuit of blind spot monitor sensor LH Blind spot monitor sensor LH ground circuit Blind spot monitor sensor RH
U0233	Lost Communication with Blind Spot Monitor Master Module	The clearance warning ECU assembly cannot receive signals from the blind spot monitor sensor (master)	Open or short in CAN bus main wire or connector Open or short in CAN bus wire or connector Open or short in No. 24 junction connector Clearance warning ECU assembly Blind spot monitor sensor RH Power source circuit of blind spot monitor sensor RH Blind spot monitor sensor RH ground circuit Blind spot monitor sensor LH