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Home >> BMW >> 1983 >> 633CSi Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - BOSCH AFC >> Testing >> Auxiliary Air Valve
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Auxiliary Air Valve

  1. With engine at normal operating temperature and idle speed set to specifications, turn air conditioner on. Connect ohmmeter to Black wire of valve connector.
  2. Voltage should be registered and air should flow through valve. Turn air conditioner off. No voltage or air should flow through valve. If valve does not respond as outlined, replace auxiliary air valve.
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