EVAP system malfunction determination

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.

The M-MDS detects small/large leaks or blockage based on the fuel tank pressure at the end of the EVAP test.

Fig 1: Detecting Small/Large Leaks Or Blockage

Courtesy of MAZDA MOTORS CORP.