DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE (CIRCUIT) - Description
EF & EC-7191prose procedureCG10, CGA3
Description
SYSTEM DESCRIPTION
System Description - Sensors and Actuators
Crankshaft position sensor (POS)
Input Signal to ECMEngine speed
ECM functionEVAP canister purge control
ActuatorEVAP canister purge volume control solenoid valve
Mass air flow sensor
Input Signal to ECMAmount of intake air
ECM function
Actuator
Engine coolant temperature sensor
Input Signal to ECMEngine coolant temperature
ECM function
Actuator
Battery
Input Signal to ECMBattery voltage
ECM function
Actuator
Ignition switch
Input Signal to ECMStart signal
ECM function
Actuator
Closed throttle position switch
Input Signal to ECMClosed throttle position
ECM function
Actuator
Throttle position sensor
Input Signal to ECMThrottle position
ECM function
Actuator
Heated oxygen sensor 1 (front)
Input Signal to ECMDensity of oxygen in exhaust gas (Mixture ratio feedback signal)
ECM function
Actuator
Vehicle speed sensor
Input Signal to ECMVehicle speed
ECM function
Actuator
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass passage in the EVAP canister purge volume control solenoid valve changes to control the flow rate. The EVAP canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor from the EVAP canister is regulated as the air flow changes.
COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve.
CONSULT-II Reference Value in Data Monitor Mode
CONSULT-II Reference Value in Data Monitor Mode
PURG VOL C/V
CONDITION• Engine: After warming up • No-load • Lift up drive wheels and shift to 1st gear position. • Air conditioner switch "OFF" — Idle
SPECIFICATION0%
CONDITIONMore than 90 seconds after starting engine More than 2,000 rpm
SPECIFICATION—