Which direction does air flow through the Hitachi IAC valve?

Air enters at the inlet (atmosphere) and exits at the outlet (manifold vacuum), as labeled with arrows in the cutaway view.

What internal components are labeled in the Hitachi Vented IAC valve?

The cutaway labels a vent/filter (location may vary), diaphragm, damping finger, valve body, solenoid, air flow inlet, and air flow outlet.

How does the NipponDenso IAC valve route air?

Air comes in from atmosphere (AIR IN) and flows out to the manifold (AIR OUT), controlled by the solenoid within the valve body.

Where is the vent/filter located on the Hitachi Vented IAC valve?

The diagram notes the vent/filter location may vary; it is shown at the top of the valve in the cutaway view.

Home/ Registry/ Ford/ Bronco/ 1992-1996/ “The Bronco”/ Photo supermotors.net/registry/media/254836

Ford IAC Valve Cutaway Diagrams - Hitachi, Vented Hitachi & NipponDenso

Idle air control valve cutaways compared: Hitachi, Hitachi vented, and NipponDenso IAC valves

‹ ›

Comparison cross-sections of three idle air control (IAC) valves: Hitachi, Hitachi vented (with damping finger/filter), and NipponDenso, each showing solenoid, valve body, atmosphere inlet and manifold-vacuum outlet.

AI caption October 2005 · Photo 128 of 277

This document is a technical illustration page showing cutaway and external views of three types of Idle Air Control (IAC) valves used on Ford vehicles: the Hitachi IAC valve, the Hitachi Vented IAC valve, and the NipponDenso IAC valve. Each section pairs an external perspective drawing of the valve with a detailed cross-section (cutaway) diagram showing internal construction and airflow paths. The Hitachi IAC valve cutaway labels the solenoid, valve body, atmospheric inlet, and manifold vacuum outlet. The Hitachi Vented IAC valve cutaway additionally identifies a vent/filter (whose location may vary), a diaphragm, a damping finger, the valve body, the solenoid, and the air flow inlet and outlet. The NipponDenso IAC valve cutaway labels the solenoid, valve body, air out (to manifold), and air in (from atmosphere), with arrows indicating airflow direction through the valve. Figure reference numbers A12764-B, A16076-A, and A12765-A appear on the three illustrations. A reader can learn how each IAC valve variant is constructed internally, how the solenoid meters air from atmosphere to the intake manifold to control idle speed, and how to visually distinguish the three valve designs. No years, models, torque specs, or part numbers are stated in the document itself.

Is this accurate? Sign in to help verify it.

Frequently asked questions

What types of IAC valves are shown in this diagram?: Three types are shown: the Hitachi IAC Valve, the Hitachi Vented IAC Valve, and the NipponDenso IAC Valve, each with external and cutaway views.
Which direction does air flow through the Hitachi IAC valve?: Air enters at the inlet (atmosphere) and exits at the outlet (manifold vacuum), as labeled with arrows in the cutaway view.
What internal components are labeled in the Hitachi Vented IAC valve?: The cutaway labels a vent/filter (location may vary), diaphragm, damping finger, valve body, solenoid, air flow inlet, and air flow outlet.
How does the NipponDenso IAC valve route air?: Air comes in from atmosphere (AIR IN) and flows out to the manifold (AIR OUT), controlled by the solenoid within the valve body.
Where is the vent/filter located on the Hitachi Vented IAC valve?: The diagram notes the vent/filter location may vary; it is shown at the top of the valve in the cutaway view.