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System Test: Corolla

  1. Check condition of hoses and tubes for cracks, kinks, damage, or loose connections.
  2. On Federal models, check Air Suction (AS) reed valve. See Figure. Remove air cleaner cover. Start engine and set at idle. Check for bubbling sound from AS valve inlet.
  3. On California models, check AS shutoff valve. See Figure. Disconnect vacuum hose from shutoff valve and plug end of hose. Remove air filter cover. Start engine and set idle.
  4. Reconnect vacuum hose to AS shutoff valve. Within 2-3 seconds a bubbling sound be heard from AS valve inlet.
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