Generic TR 125 - Page 149

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16.2.9 Idling stepper engine
16.2.9.1 Working principle of idling stepper engine:
Function of idling control valve is to control the circulation area of the airway next to the throttle body to
regulate the amount of air entering the engine to achieve the engine idling control.
16.2.9.1 Appearance of idling stepper engine: