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Home >> Saturn >> 2002 >> SC2 Standard, MP2 >> Repair and Diagnosis (Single Page) >> Steering >> Electronic Steering >> Variable Effort Steering System >> Description And Operation >> Variable Effort Steering System Description and Operation >> Electronic Variable Orifice (EVO) Actuator

Electronic Variable Orifice (EVO) Actuator

The electronic variable orifice (EVO) actuator is a 10 ohm (nominal) linear solenoid. The PCM controls the current to the high and low side of the actuator so that current control is retained in the presence of any output fault condition

The control of the actuator is accomplished by pulse width modulating (PWM) voltage to the actuator and monitoring the actual current flow. The PCM varies the PWM signal in order to make the actual current equal to the desired current

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