Checking the idle control valve

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PROCEDURE
  1. Start the engine at «constant gas».
  2. Turn on as many current consumers as possible (AC, lighting, fan, heated rear window, etc) and turn the steering wheel from lock to lock.
  3. The idling speed should drop briefly, but then quickly return to the prescribed value.
  4. Check the IAC valve. Once the connector is pulled out, the engine should stop.
  5. If not, replace the valve.







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