D 150 Pickup V6-239 3.9L (1992)
This diagnostic check is activated only during select engine/driving conditions, and checks the entire EGR system for failures. The engine
controller monitors the EGR system and if the system check shows a failure, the Malfunction Indicator Lamp in the instrument panel will
illuminate indicating that immediate service is required.
Without California Emissions
EGR Transducer
Electric EGR Transducer (EET)
PURPOSE
The Electric Exhaust Gas Recirculation Transducer combines the functions of the Back Pressure Transducer and the Electric Vacuum Solenoid
into one devise.
TRANSDUCER OPERATION
The backpressure transducer measures the amount of exhaust gas backpressure on the exhaust side of the EGR valve and it varies the amount of
vacuum supplied to the EGR valve. The transducer uses this backpressure signal to supply the correct amount of vacuum to the EGR valve
depending on engine load conditions. Vacuum is supplied to the backpressure transducer from a port on the EVAP Purge Solenoid.
SOLENOID OPERATION
The Electric Vacuum Solenoid is controlled by the engine controller. The engine controller monitors engine coolant temperature and other
operating conditions to determine when to energize the solenoid. When the engine controller supplies a ground to the solenoid (energizing),
vacuum is cut off from the EGR transducer. When the engine controller removes the ground from the solenoid (de-energizing), vacuum is allowed
to flow through the solenoid and out to the EGR transducer.
