DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0293: Lost Communication with Hybrid Vehicle Control System; DTC U1104: Lost Communication with Driving Support ECU [10/2015 - 08/2019]: Description

The hybrid vehicle control ECU assembly communicates with each sensor and ECU via CAN communication.

If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0122	Lost Communication with Vehicle Dynamics Control Module	When the power switch is on (IG) and the dynamic radar cruise control system is operating, a communication error between the skid control ECU assembly and the hybrid vehicle control ECU assembly is detected for approximately 2.6 seconds or more.	CAN communication system Hybrid vehicle control ECU assembly Skid control ECU assembly
U0293	Lost Communication with Hybrid Vehicle Control System	w/o Full-speed range following function: While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, the hybrid vehicle control ECU assembly continuously receives a communication cut-off signal from the skid control ECU assembly for approximately 1 second or more. w/ Full-speed range following function: While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, the hybrid vehicle control ECU assembly continuously receives a communication cut-off signal from the skid control ECU assembly for approximately 1 second or more.	CAN communication system Hybrid vehicle control ECU assembly Skid control ECU assembly
U1104	Lost Communication with Driving Support ECU	w/o Full-speed range following function: While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and hybrid vehicle control ECU assembly is detected for 1 second or more. w/ Full-speed range following function: While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and hybrid vehicle control ECU assembly is detected for 1 second or more.	CAN communication system Hybrid vehicle control ECU assembly Driving support ECU assembly

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0122

Lost Communication with Vehicle Dynamics Control Module

When the power switch is on (IG) and the dynamic radar cruise control system is operating, a communication error between the skid control ECU assembly and the hybrid vehicle control ECU assembly is detected for approximately 2.6 seconds or more.

CAN communication system
Hybrid vehicle control ECU assembly
Skid control ECU assembly

U0293

Lost Communication with Hybrid Vehicle Control System

w/o Full-speed range following function:

While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, the hybrid vehicle control ECU assembly continuously receives a communication cut-off signal from the skid control ECU assembly for approximately 1 second or more.

w/ Full-speed range following function:

While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, the hybrid vehicle control ECU assembly continuously receives a communication cut-off signal from the skid control ECU assembly for approximately 1 second or more.

CAN communication system
Hybrid vehicle control ECU assembly
Skid control ECU assembly

U1104

Lost Communication with Driving Support ECU

w/o Full-speed range following function:

While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and hybrid vehicle control ECU assembly is detected for 1 second or more.

w/ Full-speed range following function:

While the vehicle speed is 5 km/h (3 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and hybrid vehicle control ECU assembly is detected for 1 second or more.

CAN communication system
Hybrid vehicle control ECU assembly
Driving support ECU assembly