CUSTOMER CONCERN The radio controls are inoperative, the Audio Control Module will not communicate, and the other audio modules store DTC U0184. CAUSE Power, ground, and CAN-network circuits tested correctly, confirming an internal failure of the Audio Control Module. CORRECTION Remove and replace the Audio Control Module, program the replacement module as required, clear U0184, and verify radio-control and audio operation.

CUSTOMER CONCERN The vehicle will not crank, the instrument cluster remains dark, and DTCs U0155 and P1260 are stored. CAUSE Cluster power, ground, and high-speed CAN circuits were intact, confirming an internal instrument-cluster failure that disabled the PATS start authorization. CORRECTION Remove and replace the instrument cluster, clear U0155 and P1260, and verify cluster communication and starting operation.