DTC U0129: Lost Communication with Skid Control ECU; DTC U0130: Lost Communication with VGRS; DTC U0131: Lost Communication with Power Steering Control Module [04/2013 - 10/2016]: Description

The skid control ECU (brake actuator assembly) communicates with the front steering control ECU. When the skid control ECU (brake actuator assembly) does not receive data from the front steering control ECU, the skid control ECU (brake actuator assembly) stores DTC U0130.
The power steering ECU assembly communicates with the skid control ECU (brake actuator assembly). When the power steering ECU assembly does not receive data from the skid control ECU (brake actuator assembly), the power steering ECU assembly stores DTC U0129.
The absorber control ECU communicates with the front steering control ECU. When the absorber control ECU does not receive data from the front steering control ECU, the absorber control ECU stores DTC U0130.
The front steering control ECU communicates with the skid control ECU (brake actuator assembly) and power steering ECU assembly. When the front steering control ECU does not receive data from the skid control ECU (brake actuator assembly) or power steering ECU assembly, the front steering control ECU stores DTC U0129 or U0131.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
U0129	Lost Communication with Skid Control ECU	The power steering ECU assembly does not receive data from the skid control ECU (brake actuator assembly). The front steering control ECU does not receive data from the skid control ECU (brake actuator assembly).	Open or short in V3 bus main line or connector Open or short in V3 bus branch line or connector Power source circuit of skid control ECU (brake actuator assembly) Skid control ECU (brake actuator assembly) Power source circuit of power steering ECU assembly Power steering ECU assembly Power source circuit of front steering control ECU Front steering control ECU Open or short in No. 5 CAN junction connector	HINT: As there is no sub bus monitor ECU for V3 bus, each ECU detects communication stops and stores DTCs.
U0130	Lost Communication with VGRS	The skid control ECU (brake actuator assembly) does not receive data from the front steering control ECU. The absorber control ECU does not receive data from the front steering control ECU.	Open or short in V3 bus main line or connector Open or short in V3 bus branch line or connector Power source circuit of skid control ECU (brake actuator assembly) Skid control ECU (brake actuator assembly) Power source circuit of front steering control ECU Front steering control ECU Power source circuit of absorber control ECU Absorber control ECU Open or short in No. 5 CAN junction connector	HINT: As there is no sub bus monitor ECU for V3 bus, each ECU detects communication stops and stores DTCs.
U0131	Lost Communication with Power Steering Control Module	The front steering control ECU does not receive data from the power steering ECU assembly.	Open or short in V3 bus main line or connector Open or short in V3 bus branch line or connector Power source circuit of power steering ECU assembly power steering ECU assembly Power source circuit of front steering control ECU Front steering control ECU Open or short in No. 5 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 diagnosis procedure is for when DTC U0129, U0130 and U0131 are output at the same time.