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Home >> Buick >> 2005 >> Rainier AWD V8-5.3L VIN M >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Description and Operation >> Throttle Actuator Control (Tac) System
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Throttle Actuator Control (Tac) System



ENGINE CONTROL MODULE

The engine control module (ECM) is the control center for the throttle actuator control (TAC) system. The ECM determines the drivers intent and then calculates the appropriate throttle response. The ECM achieves throttle positioning by providing a pulse width modulated voltage to the TAC motor.
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