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Without Using WDS Or Equivalent

WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
  1. Warm up the engine and idle it.
  2. Turn the ignition switch off.
  3. Disconnect the quick release connector going to the charcoal canister from the engine room side. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION .)
  4. Start the engine and idle it.
  5. After warming up the engine, verify that the vacuum is not present by placing a finger on the quick release connector for approx. 30 s  as shown in the figure.
    Fig 1: Verifying Vacuum Presence In Hose
    G01345827Courtesy of MAZDA MOTORS CORP.
    • If the vacuum is not present, inspect the following: 
      • PCM terminal voltage
        • Evaporative purge control 
      • Purge solenoid valve
  6. Verify that the vacuum is not present after approx. 30 s  from the engine starting.
    • If the vacuum is not present, inspect the following. 
      • PCM terminal voltage
        • Intake air temperature 
        • Evaporative purge control 
        • Throttle opening angle 
        • Load/No load identifying signal 
      • Purge solenoid valve
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