DTC U1104: Lost Communication with Driving Support ECU [10/2015 - ]: Description

The driving support ECU assembly is connected to the millimeter wave radar sensor assembly, forward recognition camera and skid control ECU (brake actuator assembly) via CAN communication. If communication with the millimeter wave radar sensor assembly, forward recognition camera or skid control ECU (brake actuator assembly) stops, the driving support ECU assembly stores DTC U1104.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U1104	Lost Communication with Driving Support ECU	When the engine switch is on (IG), a communication error between the driving support ECU assembly and the millimeter wave radar sensor assembly is detected for approximately 0.2 seconds. When the engine switch is on (IG), a communication error between the driving support ECU assembly and the forward recognition camera is detected for approximately 0.3 seconds. When the engine switch is on (IG), a communication error between the driving support ECU assembly and the skid control ECU (brake actuator assembly) is detected for approximately 1.5 seconds.	CAN communication system Millimeter wave radar sensor assembly Forward recognition camera Skid control ECU (Brake actuator assembly) Driving support ECU assembly Wire harness or connector

DTC DETECTION CONDITIONS:

		Vehicle Condition
		Pattern 1	Pattern 2	Pattern 3
Diagnosis Condition	Engine switch is on (IG)	◦	◦	◦
Malfunction Status	A communication error between the driving support ECU assembly and the millimeter wave radar sensor assembly is detected	◦	-	-
	A communication error between the driving support ECU assembly and the forward recognition camera is detected	-	◦	-
	A communication error between the driving support ECU assembly and the skid control ECU (brake actuator assembly) is detected	-	-	◦
Detection Time		0.2 seconds	0.3 seconds	1.5 seconds
Number of Trips		1 trip	1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.