Audio Front Control Module - Low Line (ACM): DTC's

DTC	Description	Possible Causes	Action
B1A01-11	Speaker #1 - Circuit short to ground	Speaker circuit short to ground, short to each other Audio Control Module failure Amplifier failure	Refer to the electrical circuit diagrams and check Audio Control Module speaker to Amplifier circuit for short to ground, short to each other. Check and install a new Audio Control Module as required. Check and install a new Amplifier as required. Refer to the warranty policy and procedures information if a module is suspect
U0074-88	Control Module Communication Bus "B" Off - Bus Off	Audio Control Module power circuit short to ground, open circuit Audio Control Module ground circuit high resistance, open circuit Medium speed CAN network circuit, short to ground, high resistance, open circuit	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network
U0257-00	Lost Communication With Front Controls / Display Interface Module - No sub type information	Audio Control Module power circuit short to ground, open circuit Audio Control Module ground circuit high resistance, open circuit Medium speed CAN network circuit, short to ground, high resistance, open circuit	Refer to the electrical circuit diagrams and check the power and ground connections to the module. Using the manufacturer approved diagnostic system, complete a CAN network integrity test. Refer to the electrical circuit diagrams and check the CAN network between the Audio Control Module and Front Control Driver Information Control Module
U2100-00	Initial Configuration Not Complete - No sub type information	Audio Control Module not configured or incorrectly configured Central Junction Box not configured correctly	Clear DTC and re-Test. Re-configure the Audio Control module using the manufacturer approved diagnostic system. Re-configure the Central Junction Box using the manufacturer approved diagnostic system
U2101-00	Control Module Configuration Incompatible - No sub type information	Audio Control Module not configured or incorrectly configured Car Configuration File not configured correctly	Clear DTC and re-test. Re-configure the Audio Control module using the manufacturer approved diagnostic system. Re-configure the Car Configuration File using the manufacturer approved diagnostic system
U3000-49	Control Module - internal electronic failure	Audio Control Module failure	Check and install a new Audio Control Module as required. Refer to the warranty policy and procedures information if a module is suspect
U3006-16	Control Module Input Power "A" - Circuit voltage below threshold	Audio Control Module power feed circuit short to ground, high resistance, open circuit Charging system fault Discharged battery Audio Control Module failure	Refer to the electrical circuit diagrams and check Audio Control Module circuit for short to ground, high resistance, open circuit. Refer to the electrical circuit diagrams and check charging circuit for open circuit, short to ground. Check and install a new alternator as required. Check and install a new battery as required. Check and install a new Audio Control Module as required. Refer to the warranty policy and procedures information if a module is suspect