Diagnostic Item 9: Diagnose when the scan tool cannot receive the data sent by auto A/C controller assembly (A/C-ECU). (Vehicles with automatic A/C): Function

The diagnostic result demonstrates that "the scan tool (M.U.T.-III) cannot receive the sent data from the auto A/C controller assembly (A/C-ECU)" when the scan tool (M.U.T.-III) checks the periodically sent data from each ECU and cannot receive the auto A/C controller assembly (A/C-ECU) data only.