MX-6 L4-2184cc 2.2L SOHC Turbo F2 (1989)
EGR Valve Position Sensor: Description and Operation
Exhaust Gas Recirculation System (EGR)
The EGR system introduces exhaust gases into the intake manifold to reduce the production of NOx. It operates depending on the throttle valve
opening, driving condition, engine coolant temperature (above 40°C [104°F]), and radiator coolant temperature (above 17°C [63°F]).
The EGR system consists of the following components: Air flow meter, EGR control valve, EGR position valve, engine control unit, Ne and rotor
pick-up, EGR solenoid valve, throttle sensor, vacuum reserve chamber, engine coolant temperature sensor, and radiator coolant temperature sensor.
EGR CONTROL VALVE
The EGR control valve recirculates a portion of the exhaust gases.
EGR POSITION SENSOR
The EGR position sensor detects the EGR control valve lift amount and sends a signal to the control unit. The main component in the sensor is a
variable resistor.
ENGINE CONTROL UNIT
The engine control unit detects signals from input sensors and switches and controls the EGR solenoid valves (vent or vacuum side).
EGR SOLENOID VALVE
The EGR solenoid valve controls the vacuum signal to the EGR control valve. The vent side controls the vent line and the vacuum side controls the
vacuum side.
VACUUM STORAGE CHAMBER
The vacuum storage chamber stores a vacuum supply for use under turbo boost conditions. The chamber utilizes an integrated check valve to prevent
vacuum loss.
