DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module "A" Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message [10/2023 - ]: Description

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

These DTCs are output if a malfunction occurs in the CAN communication system connected to the driver monitor ECU assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Priority
U0100-87	Lost Communication with ECM/PCM "A" Missing Message	When a communication error between the driver monitor ECU assembly and the ECM is detected	CAN communication system	Driver Monitor Camera Control	B
U0101-87	Lost Communication with TCM Missing Message	When a communication error between the driver monitor ECU assembly and the hybrid vehicle control ECU assembly is detected	CAN communication system	Driver Monitor Camera Control	B
U0126-87	Lost Communication with Steering Angle Sensor Module Missing Message	When a communication error between the driver monitor ECU assembly and the steering sensor is detected	CAN communication system	Driver Monitor Camera Control	B
U0129-87	Lost Communication with Brake System Control Module "A" Missing Message	When a communication error between the driver monitor ECU assembly and the No. 2 skid control ECU (brake actuator assembly) is detected	CAN communication system	Driver Monitor Camera Control	B
U0131-87	Lost Communication with Power Steering Control Module "A" Missing Message	When a communication error between the driver monitor ECU assembly and the power steering ECU (rack and pinion power steering gear assembly) is detected	CAN communication system	Driver Monitor Camera Control	B
U0140-87	Lost Communication with Body Control Module Missing Message	When a communication error between the driver monitor ECU assembly and the main body ECU (multiplex network body ECU) is detected	CAN communication system	Driver Monitor Camera Control	B
U0151-87	Lost Communication with Restraints Control Module Missing Message	When a communication error between the driver monitor ECU assembly and the airbag ECU assembly is detected	CAN communication system	Driver Monitor Camera Control	B
U0155-87	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	When a communication error between the driver monitor ECU assembly and the combination meter assembly is detected	CAN communication system	Driver Monitor Camera Control	B
U023A-87	Lost Communication with Image Processing Module "A" Missing Message	When a communication error between the driver monitor ECU assembly and the forward recognition camera is detected	CAN communication system	Driver Monitor Camera Control	B
U0293-87	Lost Communication with Hybrid/EV Powertrain Control Module Missing Message	When a communication error between the driver monitor ECU assembly and the hybrid vehicle control ECU assembly is detected	CAN communication system	Driver Monitor Camera Control	B