Hyundai Santa Fe: Engine Control System / Variable Force Solenoid (VFS). Description and operation
CVVT (Continuous Variable Valve Timing) system advances or retards the valve
opening and closing timing of the intake or the exhaust valve in accordance
with the ECM control, calculated by the engine speed and the load. The CVVT
control causes a valve over-lap or under-lap between the intake valve and the
exhaust valve. This improves fuel efficiency, reduces exhaust gases (NOx, HC)
and enhances the engine performance, thanks to reduced pumping loss, internal
EGR (Exhaust Gas Recirculation) release, improved combustion stability, and
increased volumetric efficiency.The system consists of the CVVT Oil Control
Valve (OCV), which receives the ECM PWM (Pulse With Modulation) control signal
to change the path of the engine oil to supply to or discharge from the cam
phaser, the CVVT Oil Temperature Sensor (OTS), which measures the temperatures
of the engine oil, and the cam phaser, which varies the cam phasing by using
the hydraulic force of the engine oil.The oil delivered from the CVVT oil control
valve varies the phase angle of the cam, by rotating the rotor connected to
the camshaft of the cam phaser and causing the camshaft to rotate in the direction
of its engine running rotation (intake advanced / exhaust retarded) or the opposite
direction (intake retarded/ exhaust advanced).

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the PCSV connector.
3...
Other information:
Adjustment
1.
After loosening the hinge (A) mounting bolt, adjust the hood (B) by
moving it up and down or from side to side and tighten the bolt.
2.
Adjust the hood height by moving the hood overslam bumpers (C) up and
down...
System malfunction
When Rear View Monitor is not working properly, or the screen flickers, or the
camera image does not display normally, we recommend that the system be inspected
by an authorized HYUNDAI dealer.
Limitations of the system
When the vehicle is stopped for a long time in winter or when the vehicle is
parked in an indoor parking lot, the exhaust fumes may temporarily blur the image...
Categories

1. Inside door handle
2. Power window switches
3. Power window lock button/Electronic child safety lock button
4. Side view mirror folding button
5. Side view mirror control switch
6. Central door lock switch
7. Instrument panel illumination control switch
read more