H3 2006

Throttle Actuator Control System

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Location



Specific to:

Hummer H3 2006-2010

Refer to Throttle Body Removal & Installation in the Fuel Systems section.

Operation



Specific to:

Hummer H3 2006-2010

The Engine Control Module (ECM) is the control center for the Throttle Actuator Control (TAC) system. The ECM determines the driver's intent based on input from the accelerator pedal position sensors, then calculates the appropriate throttle response based on the throttle position sensors. The ECM achieves throttle positioning by providing a pulse width modulated voltage to the throttle actuator motor. The throttle blade is spring loaded in both directions, and the default position is slightly open.

Removal & Installation



Specific to:

Hummer H3 2006-2010

Refer to Throttle Body Removal & Installation in the Fuel Systems section.

Testing



Specific to:

Hummer H3 2006-2010

For testing, refer to Diagnostic Trouble Codes.

 
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