DTC U1172: Lost Communication with Vehicle Dynamics Control Module (ch2) [08/2016 - 11/2017]: Description

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
U1172	Lost Communication with Vehicle Dynamics Control Module (ch2)	No communication from the skid control ECU (brake actuator assembly) continues.	Open or short in V3 bus main line or connector Open or short in torque vectoring differential ECU assembly branch line or connector Short in roll rate and vertical acceleration sensor branch line or connector Power source circuit of skid control ECU (brake actuator assembly) Skid control ECU (brake actuator assembly) ECM Torque vectoring differential ECU assembly Roll rate and vertical acceleration sensor Open or short in No. 4 CAN junction connector Open or short in No. 6 CAN junction connector	HINT: As there is no sub bus monitor ECU for V3 bus, each ECU detects communication stops and stores DTCs.

HINT:

This diagnostic procedure is for when DTC U1172 is output by the torque vectoring differential ECU Assembly (Techstream display: TVD).