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Air Supply Valve Solenoid (Turbo)

Remove valve connector. Using ohmmeter, check resistance between terminals of air supply valve. Resistance should be between 16.5-23.5 ohms.
Apply battery voltage and ground to valve terminals. Listen for operating sound from valve. Replace valve if resistance is not within specification or no operating sound exists.

CAUTION: DO NOT turn adjusting screw on air supply valve solenoid.