Air Diverter Valve: Description and Operation

A.I.R. System Control (PEDES) Valve:

The air management system is controlled by a pressure operated port and a converter valve, each with an ECM controlled solenoid. When the solenoid is grounded by the ECM, A.I.R. pump pressure will activate the valve and allow pump air to be directed as follows:

^ Cold Mode - The port (switch) solenoid is energized which in turn opens the port valve and allows air flow to the exhaust ports.

^ Warm Mode - The port solenoid is de-energized which closes the port valve and keeps the converter valve seated, thus forcing air flow past the converter valve and to the catalytic converter.

^ Divert Mode - Both solenoids are de-energized which opens the converter valve, allowing air to to take the path of least resistance which is out the divert/relief tube to the atmosphere.