CUSTOMER CONCERN The instrument cluster, radio, and HVAC controls are inoperative, the scan tool cannot communicate with those modules, and DTCs U0155 and U0422 are stored. CAUSE The medium-speed CAN wiring leading to the HVAC module was damaged, interrupting communication with the affected modules. CORRECTION Repair the damaged medium-speed CAN circuits to the HVAC module, clear DTCs U0155 and U0422, and verify cluster, radio, HVAC, and scan-tool communication operation.

CUSTOMER CONCERN A section of instrument-cluster lamps is inoperative and the cluster stores hard DTC U3000:54 along with multiple unrelated body-system codes. CAUSE Confirmed failed instrument cluster. CORRECTION Remove and replace the instrument cluster, program and configure it to the vehicle, clear DTC U3000:54, and verify all cluster lamps and monitored systems operate normally.

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.