EGR VALVE CONSTRUCTION/OPERATION [ZY, Z6]
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Vehicles With EGR System
• Consists of a stepper motor, valve, rod, and spring.
• 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.