toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Throttle Body|Testing and Inspection > < Throttle Body|Specifications|Page 3842
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Throttle Body: Description and Operation

PURPOSE

The Throttle body, located at the opening of the Intake Manifold, controls intake air by varying throttle plate opening. Also houses the Idle Air
Control Valve and Throttle Position Sensor.

OPERATION

When the driver operates the accelerator pedal, the throttle valve is opened via the throttle cable. Idle speed is not adjustable and is controlled by
the ECM via the Idle Air Control Valve.

Throttle Body|Testing and Inspection > < Throttle Body|Specifications|Page 3842