Using the diagnostic index

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Malfunction symptoms are listed in the diagnostic index under symptom troubleshooting.
The exact malfunction symptoms can be selected by following the index.
Correctly verify the malfunction symptom according to "DESCRIPTION".

Fig 1: Diagnostic Index

Courtesy of MAZDA MOTORS CORP.