DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0130: Lost Communication with Steering Effort Control Module [09/2018 - ]: Description

The DRS ECU (rear steering control ECU) sends and receives data to and from the ECM, skid control ECU assembly and VGRS ECU (front steering control ECU) via CAN communication.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Return-to-normal Condition
U0100	Lost Communication with ECM / PCM "A"	All conditions are met: 2 seconds or more elapse after turning the engine switch on (IG). The power source voltage is 10 to 16 V. The signal from the ECM is lost for approximately 3 seconds or more.	ECM CAN communication system	Comes on	Engine switch on (IG) again
U0129	Lost Communication with Brake System Control Module	All conditions are met: 2 seconds or more elapse after turning the engine switch on (IG). The power source voltage is 10 to 16 V. The signal from the skid control ECU assembly is lost for approximately 3 seconds or more.	Skid control ECU assembly CAN communication system	Comes on	Engine switch on (IG) again
U0130	Lost Communication with Steering Effort Control Module	All conditions are met: 1 second or more elapses after turning the engine switch on (IG). The power source voltage is 10 to 16 V. The signal from the VGRS ECU (front steering control ECU) is lost for approximately 3 seconds or more.	VGRS ECU (front steering control ECU) CAN communication system	Comes on	Engine switch on (IG) again