Hyundai Santa Fe (DM): Schematic Diagrams
Schematic Diagram
Canister
Canister is filled with charcoal and absorbs evaporated vapor in fuel
tank. The gathered fuel vapor in canister is drawn into the intake manifold
by the ECM/PCM when appropriate conditions are set.
Purge Control Solenoid Valve (PCSV)
Purge Control Solenoid Valve (PCSV) is installed in the passage connecting
canister and intake manifold. It is a duty type solenoid valve and is operated
by ECM/PCM signal.
To draw the absorbed vapor into the intake manifold, the ECM/PCM will
open the PCSV, otherwise the passage remains closed.
Fuel Filler Cap
A ratchet tightening device on the threaded fuel filler cap reduces the
chances of incorrect installation, seals the fuel filler. After the gasket on
the fuel filler cap and the fill neck flange make contact, the ratchet produces
a loud clicking noise indicating the seal has been set.
Fuel Tank Pressure Sensor (FTPS)
The Fuel Tank Pressure Sensor (FTPS) is an integral part of the monitoring
system. The FTPS checks Purge Control Solenoid Valve (PCSV) operation and leaks
in the Evaporative Emission Control System by monitoring pressure and vacuum
level in the fuel tank during PCSV operating cycles.
Canister Close Valve (CCV)
The Canister Close Valve (CCV) is located between the canister and the
fuel tank air filter. It closes off the air inlet to the canister for the Evaporative
Emissions System and also prevents fuel vapors from escaping from the Canister
when the vehicle is not operating.
Evaporative System Monitoring
Evaporative Emission Control Monitoring System consists of fuel vapor
generation, evacuation, and leakage check step. At first, the OBD-II system
checks if vapor generation due to fuel temperature is small enough to start
monitoring. Then it evacuates the evaporative system by means of PCSV with ramp
in order to maintain a certain vacuum level. The final step is to check if there
is vacuum loss by any leakage of the system.
Vapor Generation Checking
During stabilization period, the PCSV and the CCV are closed. The system
pressure is measured as starting pressure (DP_A). After a certain defined period
(T1), the system pressure (DP_B) is measured again and the difference from the
starting pressure is calculated. If this difference (DP_B - DP_A) is bigger
than a threshold, there should be excessive vapor and the monitor is aborted
for next checking. On the contrary, if the difference is lower than another
negative threshold, PCSV is regarded as malfunction such as clogged at open
position.
Evacuation
PCSV is opened with a certain ramp for the pressure to reach down to a
certain level. If pressure can’t be lowered below a threshold, the system is
regarded as fuel cap-opened or having a large leakage.
Leaking Checking
PCSV is closed and the system waits for a period to get stabilized pressure.
During checking period (T2), the system measures the beginning and the end of
the system pressure (DP_C, DP_D). The diagnosis value is the pressure difference
corrected by natural vapor generation (DP_B - DP_A) rate from the vapor generation
checking step.
Description and Operation
Description Evaporative Emission Control System prevents fuel vapor stored in fuel tank from vaporizing into the atmosphere. When the fuel evaporates in the fuel tank, the vapor passes through vent hoses ...
Components and Components Location
Components Location 1. Purge Control Solenoid Valve (PCSV) 2. Vapor line 3. Fuel tank air filter 4. Canister Close Valve (CCV) 5. Canister 6. Fuel Tank Pressure Sensor (FTPS) ...
See also:
High Beam Indicator Light
This indicator light illuminates: When the headlights are on and in the high beam position When the turn signal lever is pulled into the Flash-to-Pass position. ...
ECO Indicator Light
This indicator light illuminates: When you activate the active ECO system by pressing the ACTIVE ECO button. For more details, refer to “Active ECO System” in chapter 5. ...
Operating HomeLink
To operate, simply press and release the programmed HomeLink® button. Activation will now occur for the trained device (i.e. garage door opener, gate operator, security system, entry door lock, home/office ...