Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Intake Air System

Intake Air System

This system supplies air for engine needs.

Intake Air Bypass Control Thermal Valve




When the engine is running, the intake air bypass control thermal valve sends air to the injectors.

Throttle Body




The throttle body is a single-barrel side draft type. It houses the TP sensor and the IAC valve. The lower portion of the IAC valve is heated by engine coolant from the cylinder head.

Intake Air System Diagram




This system supplies air for engine needs. A resonator in the intake air pipe provides additional silencing as air is drawn into the system.