Idle Air Actuator Valve

Idle air actuator valve and air circuit (passage ways) should be checked for physical obstructions. Visually inspect the sealing gasket, mounting bracket and air hose clamps. Resistance of the valve winding should be checked. ECM output and idle speed control valve operation can be tested by COMPONENT ACTIVATION on DISplus/GT1. Pulse width modulation ground outputs from the ECM can be tested using the DISplus/GT1 oscilloscope. If valve is blocked or contaminated, a fault code can also be present. See IDLE AIR ACTUATOR VALVE LOCATION  table. Valve is either a 2-pin or 3-pin type. See Fig 1 and Fig 2 .

Fig 1: Identifying Idle Air Actuator Valve 2-Pin Connector

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Fig 2: Identifying Idle Air Actuator Valve 3-Pin Connector

Courtesy of BMW OF NORTH AMERICA, INC.