Module Communications Network DTCS

COMMUNICATION NETWORK DIAGNOSTIC TROUBLE CODES (DTC) LIST (1 OF 2)

DTC	Description	Source	Perform Test
U0073	Control Module Communication Bus Off	Smart junction box (SJB)	The module could not communicate on the network at a point in time. The fault is not currently present. CLEAR the DTC. REPEAT the network test with the scan tool.
U0101	Lost Communication With TCM	Powertrain control module (PCM)	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0121	Lost Communication With Anti-Lock Brake System (ABS) Control Module	Four wheel drive (4WD) control module	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0129	Lost Communication With Brake System Control Module	PCM	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0155	Lost Communication With Instrument Panel Cluster (IC) Control Module	PCM	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U1900	CAN Communication Bus Fault-Receive Error	Anti-lock brake system (ABS) module	For module that failed the network test, go to Symptom Chart.
U1900	CAN Communication Bus Fault-Receive Error	Instrument cluster	For module that failed the network test, go to Symptom Chart.
U1900	CAN Communication Bus Fault-Receive Error	SJB	For module that failed the network test, go to Symptom Chart.
U1900	CAN Communication Bus Fault-Receive Error	4WD control module	For module that failed the network test, go to Symptom Chart.
U2023	Fault Received From External Node	ABS module	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.
U2023	Fault Received From External Node	SJB	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.

COMMUNICATION NETWORK DIAGNOSTIC TROUBLE CODES (DTC) LIST (2 OF 2)

DTC	Description	Source	Perform Test
U0073	Control Module Communication Bus Off	Smart junction box (SJB)	The module could not communicate on the network at a point in time. The fault is not currently present. CLEAR the DTC. REPEAT the network test with the scan tool.
U0073	Control Module Communication Bus Off	Transmission control module (TCM)	The module could not communicate on the network at a point in time. The fault is not currently present. CLEAR the DTC. REPEAT the network test with the scan tool.
U0100	Lost Communication With ECM/PCM	Traction battery control module (TBCM)	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0101	Lost Communication With TCM	Powertrain control module (PCM)	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0111	Lost Communication With Battery Energy Control Module (BCM)	PCM	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0121	Lost Communication With Anti-Lock Brake System (ABS) Control Module	Four wheel drive (4WD) control module	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0129	Lost Communication With Brake System Control Module	PCM	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U0155	Lost Communication With Instrument Panel Cluster (IC) Control Module	PCM	CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test.
U1900	CAN Communication Bus Fault-Receive Error	Anti-lock brake system (ABS) module	For module that failed the network test, go to Symptom Chart.
U1900	CAN Communication Bus Fault-Receive Error	Instrument cluster	For module that failed the network test, go to Symptom Chart.
U1900	CAN Communication Bus Fault-Receive Error	Power steering control module	For module that failed the network test, go to Symptom Chart.
U1900	CAN Communication Bus Fault-Receive Error	SJB	For module that failed the network test, go to Symptom Chart.
U1900	CAN Communication Bus Fault-Receive Error	4WD control module	For module that failed the network test, go to Symptom Chart.
U2023	Fault Received From External Node	Power steering control module	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.
U2023	Fault Received From External Node	SJB	RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES article.