DIAGNOSTIC ITEM 9: Diagnose when the scan tool cannot receive the data sent by the ECM < M/T > or the PCM < A/T >.: Function

The diagnostic result demonstrates that "the scan tool cannot receive the sent data from the ECM < M/T > or PCM < A/T >" when the scan tool MB991958 checks the periodically sent data from each ECU and cannot receive the ECM < M/T > or PCM < A/T > data only.