Honda 2004 Odyssey Service Manual page 360

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Idle Control System Diagram

The idle speed of the engine is controlled by the idle air control (IAC) valve:

• After the engine starts, the IAC valve opens for a certain amount of time. The amount of air is increased to raise the

• When the engine coolant temperature is low, the IAC valve is opened to obtain the proper fast idle speed. The

amount of bypassed air is thus controlled in relation to engine coolant temperature.

Intake Air System Diagram

This system supplies air for engine needs. An intake air resonator in the intake air pipe provides additional silencing as

air is drawn into the system.

INTAKE MANIFOLD

BYPASS CONTROL

THERMAL VALVE

THROTTLE BODY

VARIOUS SENSORS

INTAKE AIR PIPE

AIR TEMPERATURE

CONTROL VALVE

AIR INTAKE DUCT

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