DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0122: Lost Communication with Vehicle Dynamics Control Module; DTC U0125: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U1104: Lost Communication with Driving Support ECU [10/2015 - ]: Description

The ECM and driving support ECU assembly communicate signals with each sensor and ECU via CAN communication.

If there are any malfunctions in the communication circuit, one or more CAN communication system DTCs are output.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0100	Lost Communication with ECM / PCM "A"	While the vehicle speed is 40 km/h (25 mph) or more and the dynamic radar cruise control system is operating, a communication error between the ECM and the driving support ECU assembly is detected for approximately 0.92 seconds or more.1 While the vehicle speed is 40 km/h (25 mph) or more and the dynamic radar cruise control system is operating, the ECM continuously receives a communication cut-off signal from the skid control ECU (brake actuator assembly) for approximately 1 second or more.2	CAN communication system ECM Driving support ECU assembly1 Skid control ECU (brake actuator assembly)2 Central Gateway ECU
U0122	Lost Communication with Vehicle Dynamics Control Module	When the engine switch is on (IG) and the dynamic radar cruise control system is operating, a communication error between the skid control ECU (brake actuator assembly) and the ECM is detected for approximately 2.65 seconds or more.	CAN communication system ECM Skid control ECU (brake actuator assembly) Central Gateway ECU
U0125	Lost Communication with Yaw Rate Sensor Module	While the vehicle speed is 40 km/h (25 mph) or more and the dynamic radar cruise control system is operating, a communication error between the yaw rate sensor and the driving support ECU assembly is detected for approximately 0.8 seconds or more.	CAN communication system Airbag ECU assembly Yaw rate sensor assembly Driving support ECU assembly Central Gateway ECU
U0126	Lost Communication with Steering Angle Sensor Module	While the vehicle speed is 40 km/h (25 mph) or more and the dynamic radar cruise control system is operating, a communication error between the steering sensor and the driving support ECU assembly is detected for approximately 0.8 seconds or more.	CAN communication system Steering sensor Driving support ECU assembly Central Gateway ECU
U0129	Lost Communication with Brake System Control Module	While the vehicle speed is 40 km/h (25 mph) or more and the dynamic radar cruise control system is operating, a communication error between the skid control ECU (brake actuator assembly) and the driving support ECU assembly is detected for approximately 1.08 seconds or more.	CAN communication system Skid control ECU (brake actuator assembly) Driving support ECU assembly Central Gateway ECU
U1104	Lost Communication with Driving Support ECU	While the vehicle speed is 40 km/h (25 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and the millimeter wave radar sensor assembly is detected for approximately 0.2 seconds or more.1 While the vehicle speed is 40 km/h (25 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and ECM detected for 1 second or more.2	CAN communication system Millimeter wave radar sensor assembly1 Driving support ECU assembly ECM2

⁽⁾	1: When the DTC is stored in the driving support ECU assembly.2: When the DTC is stored in the ECM.