Airflow Inspection - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
LF
Z6
• If vacuum is not applied, inspect the following:
- PID: EVAPCP
- Purge solenoid valve
5. Disconnect the vacuum hose.
6. Using the "EVAPCP" simulation function, set the present 0% duty value of the purge solenoid valve to
the 100% duty value and verify that the engine idles roughly or stalls.
• If the idle status does not change, inspect the following:
(1) Turn the ignition switch to the ON position.
(2) Using the "EVAPCP" simulation function, set the present 0% duty value of the purge solenoid
valve to the 50% duty value and verify purge solenoid valve operation sound.
• If the operation sound is verified, inspect the following:
- Disconnection and damage of the vacuum hose (intake manifold-purge solenoid valve-charcoal
canister)
• If the operation sound is not verified, inspect the following:
- Purge solenoid valve
- Wiring harness and connector open circuit (main relay-purge solenoid valve-PCM)

Airflow Inspection

1. Disconnect the negative battery cable.
2. Remove the purge solenoid valve.
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