DTC U0242: Lost Communication With Headlamp Control Module "B" [09/2016 - ]: Description

The No. 1 headlight ECU sub-assembly LH stores this DTC when the No. 1 headlight ECU sub-assembly RH detects an internal malfunction or if a communication malfunction occurs between No. 1 headlight ECU sub-assembly LH and No. 1 headlight ECU sub-assembly RH for 10 seconds or more.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0242	Lost Communication With Headlamp Control Module "B"	Either of the following conditions is met: No. 1 headlight ECU sub-assembly RH internal malfunctioning Communication malfunction between No. 1 headlight ECU sub-assembly LH and No. 1 headlight ECU sub-assembly RH is 10 seconds or more	No. 1 headlight ECU sub-assembly LH No. 1 headlight ECU sub-assembly RH Harness or connector