Hyundai i-30: Engine Control System / Oil Pressure & Oil Temperature Sensor (OPTS)

Hyundai i30 (PD) 2018-2024 Service Manual / Engine Control / Fuel System / Engine Control System / Oil Pressure & Oil Temperature Sensor (OPTS)

Description and operation
Description
It generates the oil pressure and temperature information (output voltage) to control the pump operation proportional control valve in variable oil pump system.
It measures the oil pressure and temperature discharged from the oil pump and transmits the pressure information to ECM. The ECM controls the proportional control valve to regularly keep the discharged pressure depending on RPM.

Specifications
Specification
Oil Pressure Sensor
▷ Type : Capacitive type
Pressure
Output Voltage (V)
bar
[MPa (kgf/cm², psi)]
[Vref=5V]
0.5
0.05 (0.5, 7.2)
0.3
1
0.1 (1.0, 14.5)
0.5
6
0.6 (6.1, 87.0)
2.5
11
1.1 (11.2, 159.5)
4.5

Oil Temperature Sensor
▷ Type : Thermistor type
Temperature [°C, (°F)]
Resistance (kΩ)
-40 (-40)
125.5 - 136.7
-30 (-22)
93.3 - 104.7
-20 (-4)
63.9 - 71.2
-10 (14)
41.8 - 46.5
0 (32)
26.8 - 30.1
10 (50)
17.2 - 19.2
20 (68)
11.1 - 12.5
25 (77)
9.0 - 10.1
30 (86)
7.4 - 8.3
40 (104)
4.9 - 5.5
50 (122)
3.3 - 3.8
60 (140)
2.3 - 2.6
70 (158)
1.6 - 1.8
80 (176)
1.2 - 1.3
90 (194)
0.86 - 0.97
100 (212)
0.64 - 0.72
110 (230)
0.48 - 0.54
120 (248)
0.37 - 0.41
130 (266)
0.28 - 0.32
140 (284)
0.22 - 0.25
150 (302)
0.17 - 0.2
160 (320)
0.14 - 0.17

Schematic diagrams
Circuit Diagram

Harness Connector

Repair procedures
Inspection
1.
Switch "OFF" the ignition.
2.
Remove the CVVT 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 2.
4.
Check that the resistance is within the specification.
Temperature
Resistance (kΩ)
°C
°F
-40
-40
41.74 - 54.54
-20
-4
14.13 - 16.83
0
32
5.28 - 6.3
25
77
1.88 - 2.14
40
104
1.08 - 1.12
60
140
0.56 - 0.61
80
176
0.31 - 0.33
140
284
0.07 - 0.08

Removal
1.
Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
2.
Lift the vehicle.
3.
Remove the engine room under cover.
(Refer to Engine Mechanical System - "Engine Room Under Cover")
4.
Remove the oil pressure & oil temperature sensor (A) after disconnect the oil pressure & oil temperature sensor connector.
Tightening Torque :
35.3 - 38.2 N.m (3.6 - 3.9 kgf.m, 26.0 - 28.2 lb.ft)

Installation
  
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.

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