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System Description
 
 
SYSTEM DIAGRAM
Component partsFunction
Crankshaft position sensorRefer to Crankshaft Position Sensor.
Exhaust camshaft position sensorRefer to Exhaust Camshaft Position Sensor.
Mass air flow sensor
(With intake air temperature sensor)
Refer to Mass Air Flow Sensor (With Intake Air Temperature Sensor).
Engine coolant temperature sensorRefer to Engine Coolant Temperature Sensor.
Air fuel ratio (A/F) sensor 1Refer to Air Fuel Ratio (A/F) Sensor 1.
Throttle position sensorRefer to Electric Throttle Control Actuator.
Accelerator pedal position sensorRefer to Accelerator Pedal Position Sensor.
BatteryECM detects the battery voltage.
Fuel tank temperature sensorRefer to Fuel Tank Temperature Sensor.
EVAP control system pressure sensorRefer to EVAP Canister Vent Control Valve.
Combination meterIt transmits the vehicle speed signal to ECM via CAN communication.
ECMRefer to ECM.
EVAP canister purge volume control solenoid valveRefer to EVAP Canister Purge Volume Control Solenoid Valve.
 
 
INPUT/OUTPUT SIGNAL CHART
SensorInput signal to ECMECM functionActuator
Crankshaft position sensor
Camshaft position sensor
Engine speed*1EVAP canister purge flow controlEVAP canister purge volume control solenoid valve
Mass air flow sensorAmount of intake air
Engine coolant temperature sensorEngine coolant temperature
BatteryBattery voltage*1
Throttle position sensorThrottle position
Accelerator pedal position sensorAccelerator pedal position
Air fuel ratio (A/F) sensor 1Density of oxygen in exhaust gas
(Mixture ratio feedback signal)
Fuel tank temperature sensorFuel temperature in fuel tank
EVAP control system pressure sensorPressure in purge line
Combination meterVehicle speed*2
*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM through CAN communication line.
 
 
SYSTEM DESCRIPTION
The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.
The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the vapor is stored there when the engine is not operating or when refueling to the fuel tank.
The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the engine operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is proportionally regulated as the air flow increases.
EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating.