EVAP system malfunction judgment

• M-MDS detect the small/large leak or blockage based on fuel tank pressure at the end of EVAP Test.

Fig 1: EVAP System Malfunction Judgment Chart

Courtesy of MAZDA MOTORS CORP.

A small leak in the purge solenoid valve is suspect. 

• This judgment means tank pressure goes to minus side at stage 2 test.

• Check the purge solenoid valve. Refer to the PURGE SOLENOID VALVE INSPECTION .