Hyundai Genesis (DH): Engine Control System / Oil Pressure Sensor (OPS) Description and Operation
Continuous Variable Valve Timing (CVVT) system advances or
retards the valve timing of the intake and exhaust valve in accordance
with the ECM control signal which is calculated by the engine speed and
load.
By controlling CVVT, the valve over-lap or under-lap occurs,
which makes better fuel economy and reduces exhaust gases (NOx, HC) and
improves engine performance through reduction of pumping loss, internal
EGR effect, improvement of combustion stability, improvement of
volumetric efficiency, and increase of expansion work.
This system consists of
- the CVVT Oil Control Valve (OCV) which supplies the engine
oil to the cam phaser or cuts the engine oil from the cam phaser in
accordance with the ECM PWM (Pulse With Modulation) control signal,
- the CVVT Oil Temperature Sensor (OTS) which measures the engine oil temperature,
- and the Cam Phaser which varies the cam phase by using the hydraulic force of the engine oil.
The engine oil which is supplied through the CVVT oil control
valve varies the cam phase in the direction (Intake Advance/Exhaust
Retard) or opposite direction (Intake Retard/Exhaust Advance) of the
engine rotation by rotating the rotor connected with the camshaft inside
the cam phaser.

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the OTS connector.
3.
Remove the OTS (Refer to "Removal").
4.
After immersing the thermistor of the sensor into engine coolant, measure resistance between the OTS terminals 1 and 2.
Specifications
TerminalResistance (k?)2 - 42.76 ~ 4.132 - 31.89 ~ 2.843 - 41.71 ~ 2.84
Other information:
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad")
3.
Remove the blind spot detection (BSD) switch (A) after disengaging the mounting clip.
Installation
1.
Install the crash pad side switch assembly after connecting the connector.
Replacement
1.
Remove both stoppers (B) by turning them from the glove box (A).
2.
Disconnect the air damper (A) from the glove box (B).
3.
Remove the filter cover (A) by pressing the knob.
4.
Replace the air filter (A) with a new one according to the direction of air filter.