EGR VALVE CONSTRUCTION/OPERATION [ZJ, ZY]


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•  Consists of a stepper motor, valve, rod, and spring.
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•  Operates based on the signal from the PCM to drive the EGR valve stepping motor.
•  The PCM determines the optimum EGR valve opening angle based on the engine speed and intake air amount when the engine is completely warmed up and drives the EGR valve.