DTC U0074-88: Control Module Communication Bus "B" Off Bus Off; DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0125-87: Lost Communication With Multi-axis Acceleration Sensor Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0131-87: Lost Communication With Power Steering Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message [08/2021 -]: Description

WARNING: This page is about a different car, the 2022 Toyota Avalon, 2021 Toyota Avalon, 2020 Toyota Avalon, and 2019 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

The skid control ECU (brake actuator assembly) communicates with the following ECUs and sensors via CAN communication.

ECM
TCM (ECM)
Yaw rate and acceleration sensor (airbag ECU assembly)
Steering angle sensor
Power steering ECU (rack and pinion power steering gear assembly)
Main body ECU (multiplex network body ECU)
Airbag ECU assembly

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0074-88	Control Module Communication Bus "B" Off Bus Off	The +BS terminal voltage is between 9.6 and 16.5 V and a bus OFF state occurs for 0.1 seconds or more.	CAN communication system
U0100-87	Lost Communication with ECM/PCM "A" Missing Message	The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals cannot be sent to the ECM for 2 seconds or more.	CAN communication system ECM Skid control ECU (brake actuator assembly)
U0101-87	Lost Communication with TCM Missing Message	The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals cannot be sent to the TCM (ECM) for 2 seconds or more.	CAN communication system TCM (ECM) Skid control ECU (brake actuator assembly)
U0125-87	Lost Communication With Multi-axis Acceleration Sensor Module Missing Message	The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals from the yaw rate and acceleration sensor (airbag ECU assembly) cannot be received for 1 second or more.	CAN communication system Yaw rate and acceleration sensor (airbag ECU assembly) Skid control ECU (brake actuator assembly)
U0126-87	Lost Communication with Steering Angle Sensor Module Missing Message	The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals from the steering angle sensor cannot be received for 1 second or more.	CAN communication system Steering angle sensor Skid control ECU (brake actuator assembly)
U0131-87	Lost Communication With Power Steering Control Module Missing Message	The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals from the power steering ECU with motor assembly cannot be received for 2 seconds or more.	CAN communication system Power steering ECU (rack and pinion power steering gear assembly) Skid control ECU (brake actuator assembly)
U0140-87	Lost Communication with Body Control Module Missing Message	The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, data cannot be received from main body ECU (multiplex network body ECU) continuously for 2 seconds or more.	CAN communication system Main body ECU (multiplex network body ECU) Skid control ECU (brake actuator assembly)
U0151-87	Lost Communication with Restraints Control Module Missing Message	The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals from the airbag ECU assembly cannot be received for 5 seconds or more.	CAN communication system Airbag ECU assembly Skid control ECU (brake actuator assembly)