Hyundai Elantra (CN7): Engine Control System / CVVT Oil Temperature Sensor (OTS)
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 consist 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 getting out of 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.
Specifications
Temperature [°C (°F)]
|
Resistance (kΩ)
|
-40 (-40)
| 125.53 - 136.70
|
-20 (-4)
| 63.89 - 71.23
|
0 (32)
| 26.83 - 30.07
|
20 (68)
| 11.13 - 12.48
|
40 (104)
| 4.89 - 5.50
|
60 (140)
| 2.32 - 2.61
|
80 (176)
| 1.17 - 1.32
|
100 (212)
| 0.63 - 0.71
|
120 (248)
| 0.37 - 0.41
|
140 (284)
| 0.22 - 0.25
|
160 (320)
| 0.14 - 0.16
|
Schematic diagrams
Harness Connector
Repair procedures
| 1. | Turn ignition switch OFF. |
| 2. | Remove the oil pressure & oil temperature sensor. (Refer to - "Removal") |
| 3. | After immersing the thermistor of the sensor into engine coolant, measure resistance between the OTS terminals 1 and 4. |
| 4. | Check that the resistance is within the specification.
Temperature [°C (°F)]
| Resistance (kΩ)
| -40 (-40)
| 125.53 - 136.70
| -20 (-4)
| 63.89 - 71.23
| 0 (32)
| 26.83 - 30.07
| 20 (68)
| 11.13 - 12.48
| 40 (104)
| 4.89 - 5.50
| 60 (140)
| 2.32 - 2.61
| 80 (176)
| 1.17 - 1.32
| 100 (212)
| 0.63 - 0.71
| 120 (248)
| 0.37 - 0.41
| 140 (284)
| 0.22 - 0.25
| 160 (320)
| 0.14 - 0.16
|
|
| 1. | Turn the ignition switch OFF and disconnect the battery negative (-) cable. |
| 3. | Remove the engine room under cover. (Refer to Engine Mechanical System - "Engine Room Under Cover") |
| 4. | Disconnect the oil pressure & oil temperature sensor connector (A), and then remove the oil pressure & oil temperature sensor (B). Tightening Torque : 14.7 - 21.6 N.m (1.5 - 2.2 kgf.m, 10.8 - 15.9 lb-ft) |
|
| •
| Install the component to the specified torques. |
| •
| Note that internal damage may occur when the component is dropped. In this case, use it after inspecting. |
| •
| Apply the sealant to the sensor. |
| •
| Insert the sensor in the installation hole and be careful not to damage it during installation. |
|
| 1. | Install in the reverse order of removal. |
Description and operation
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Description and operation
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Other information:
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DescriptionThe A/C Pressure Transducer (APT) converts the pressure value of high pressure line into voltage value after measuring it. By converted voltage value, engine ECU controls the cooling fan by operating it high speed or low speed.
General Safety Information and Caution1.Be careful when driving the vehicle using the smart cruise control system as follows.(1)On curves or inclines/declines•
The smart cruise control system may have limits to detect distance to the vehicle ahead due to road and traffic conditions.
