Vapor test

1. Move the vehicle to a location where safety can be assured.
2. Ignition switched ON (engine off).
3. Access the following PIDs using the M-MDS. (See PCM INSPECTION .)
   • EVAPCP
   • EVAPCV
4. Press the [VAPOR TEST] button in the center of the tester and verify that the red lamp turns on.

   Courtesy of MAZDA MOTORS CORP.

5. Turn the EVAP/low pressure flow control valve for the EVAP/low pressure testing (right side of tester) to ON.

   Courtesy of MAZDA MOTORS CORP.

   NOTE:

   • The vapor flow can be adjusted between the minimum and maximum levels.
   • The value indicated by the flow meter indicates the flow rate of the vapor supplied to the EVAP system.
   • The value indicated by the system pressure gauge indicates the internal pressure of the EVAP system.
6. Set the value for simulation item EVACP to 50% duty cycle.
7. Remove the evaporative hose inside the engine compartment. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
8. Verify that vapor comes out from the evaporative hose.
9. Set the CV solenoid valve (simulation item: EVAPCV) to ON using the M-MDS.
10. Set the value for simulation item EVACP to 0% duty cycle.
11. Leave for 2 min with the EVAP/low pressure flow control valve ON.
12. Monitor the indication of the flow meter for the EVAP/low pressure testing (right side of tester).

    Flow meter value decreases to the minimum flow rate

    • The EVAP system is normal in the passage between the fuel-filler cap installation surface and the purge solenoid valve, or between the charcoal canister and the CV solenoid valve.
      • Perform inspections of the following part because malfunctions can be considered with them.
    • Fuel-filler cap (See FUEL-FILLER CAP INSPECTION .)

    Flow meter value does not decrease to the minimum flow rate

    • The EVAP system has a malfunction between the fuel-filler cap and the purge solenoid valve, or between the charcoal canister and the CV solenoid valve.
    • Proceed to the next step.
13. Verify that vapor is leaking from the evaporative hose.

Vapor is leaking

• A malfunction can be considered with the purge solenoid valve. Perform the purge solenoid valve inspection. (See PURGE SOLENOID VALVE INSPECTION .)

Vapor is not leaking

• Verify if vapor is leaking from between the fuel-filler cap and the purge solenoid valve using the halogen inspection light.

• If vapor is leaking, replace the malfunctioning part, and perform the Air only test again. (See AIR ONLY TEST .)