Chart C-7A Pulse Width Modulated EGR - Exc. Calif. 3.8L VIN A

Fig. 023 - Chart C-7A Exhaust Gas Recirculation Valve Check.:

CHART C-7A, PULSE WIDTH MODULATED (PWM) EGR (EXC. CALIF. 3.8L VIN A)

PWM EGR is an ECM control that pulses the vacuum signal to the EGR. This is accomplished through an EGR solenoid that when energized by the ECM shuts off the vacuum to the EGR. This system can pulse the solenoid many times per second (PWM). The EGR solenoid is always energized (EGR off) when the transmission is in park or neutral.