DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U1104-87: Lost Communication with Driving Support ECU Missing Message; DTC U114A-87: Lost Communication with Sub Battery System Missing Message; DTC U1184-87: Lost Communication with Advanced Drive Control Module Missing Message [11/2021 - 10/2023]: Procedure

WARNING: This page is about a different car, the 2024 Lexus LS 500h, 2023 Lexus LS 500h, and 2022 Lexus LS 500h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC

Clear the DTCs.
Body Electrical > Spatial Information Service > Clear DTCs

Check for DTCs.

Body Electrical > Spatial Information Service > Trouble Codes

Result

Result	Proceed to
U0101-87, U0129-87, U0155-87, U1104-87, U114A-87 or U1184-87 are output	A
DTCs are not output	B

Result:

GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2023]

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 10/2023]