Hyundai 31420-2D501 CANISTER Assembly

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EVAP means the process of capturing fuel vapours from, for example, the fuel tank and releasing them later into the intake system during the working cycle and their mixture with the air/fuel. They include Fuel Tank, FTP sensor, Canister filled with activated charcoal, Canister purge solenoid valve, Canister Close Valve known as CCV, and vapor and purge line. Expelled gases rise through a one-way or check valve in the fuel tank through its gas vapor accumulation canister, where the engine is warmed up, the PCM acts to open the canister purge solenoid valve to drain the gases in the accumulator into the intake manifold chamber to be burned up. Thus, the PCM controls the flow rate of the vapor through the manipulation of the solenoid current duty cycle, depending on the status of the engine temperature. The FTP sensor measures the pressure differential between the ambient environment and fuel tank with the assistance of the PCM; if high pressure is indicated, the CCV is opened. To check the function of the EVAP system, hose should be checked for break or separation and the wiring associated with it should be properly connected. Brackets and screws differ according to the model year of Honda Civic and the position of the canister is another factor to be reckoned with while checking for cracks or leaks. This part is in charge of ensuring that debris cannot penetrate into the canister hence it should be checked to ensure that it is not dame or clogged. The CCV which is situated towards the upper end of the canister can be verified for its functionality with regard to electrical connection. The valve placed more or less halfway along the hose between the canister and the CCV should have a one way air flow. Depending on the model and specifications of the particular make and model of the vehicle being worked on, there are several operations that need to be performed, including tests on the canister purge solenoid valve that regulates the flow of the vapor to the intake manifold, tests on its vacuum retaining capacity, and a check on the electrical functionality of the valve as well. Some of them are described below: One of the sensors fitted close to the fuel tank is named the FTP sensor and some tests should be performed to get the correct readings mainly for the models prior to 2006.