DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0293: Lost Communication with Hybrid Vehicle Control System [11/2016 - ]: Description

The hybrid vehicle control ECU assembly communicates with the ECM and skid control ECU assembly. When the hybrid vehicle control ECU assembly does not receive data from the ECM or skid control ECU assembly, the hybrid vehicle control ECU assembly stores DTC U0100 or U0129.
The ECM communicates with the hybrid vehicle control ECU assembly. When the ECM does not receive data from the hybrid vehicle control ECU assembly, the ECM stores DTC U0293.
The skid control ECU assembly communicates with the hybrid vehicle control ECU assembly. When the skid control ECU assembly does not receive data from the hybrid vehicle control ECU assembly, the skid control ECU assembly stores DTC U0293.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
U0100	Lost Communication with ECM / PCM "A"	The hybrid vehicle control ECU assembly does not receive data from the ECM.	Open or short in local bus main line or connector Open or short in local bus branch line or connector Hybrid vehicle control ECU assembly ECM Open or short in No. 6 CAN junction connector	HINT: As there is no sub bus monitor ECU for local bus, each ECU detects communication stops and stores DTCs.
U0129	Lost Communication with Brake System Control Module	The hybrid vehicle control ECU assembly does not receive data from the skid control ECU assembly.	Open or short in local bus main line or connector Open or short in local bus branch line or connector Hybrid vehicle control ECU assembly Skid control ECU assembly Open or short in No. 6 CAN junction connector	HINT: As there is no sub bus monitor ECU for local bus, each ECU detects communication stops and stores DTCs.
U0293	Lost Communication with Hybrid Vehicle Control System	The ECM does not receive data from the hybrid vehicle control ECU assembly. The skid control ECU assembly does not receive data from the hybrid vehicle control ECU assembly.	Open or short in local bus main line or connector Open or short in local bus branch line or connector ECM Hybrid vehicle control ECU assembly Skid control ECU assembly Open or short in No. 6 CAN junction connector	HINT: As there is no sub bus monitor ECU for local bus, each ECU detects communication stops and stores DTCs.

HINT:

This diagnosis procedure is for when DTC U0100, U0129 and U0293 are output at the same time.