Notes On Using Diagnostic Routines

The diagnostic routines list the components and systems that can contribute to a particular condition in the order of probability, ease of accomplishment, and accessibility. These routines can be used as check lists for references in the event of unusual or infrequent causes of malfunction.
It is not necessary that any given order be followed, but it makes good sense for the technician to visually inspect everything that their experience tells them could be the source of the condition before beginning a more involved diagnosis. The effectiveness of every service must be validated.
If the diagnostic path you follow shows all components/systems to be operating properly, return to the diagnostic routine for other possible causes of the symptom.