Hyundai Santa Cruz (NX4A OB) 2021-2025 Service Manual / Engine Control / Fuel System / Engine Control System / Oil Pressure & Oil Temperature Sensor (OPTS)

Hyundai Santa Cruz: Engine Control System / Oil Pressure & Oil Temperature Sensor (OPTS)

- 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.

- Specification Oil Pressure Sensor ▷ Type : Capacitive type

Pressure		Output Voltage (V) [Vref=5V]
bar	[MPa (kgf/cm², psi)]	Output Voltage (V) [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

- Circuit Diagram

Harness Connector

- Inspection

1.Engine control system can quickly diagnose the faulty part by using the diagnostic tool.(Refer to "DTC guide")

(1) Self-diagnosis : Inspects and displays the DTC.

(2) Sensor data : Checks system input/output values.

(3) Forced operation : Checks system operation status

(4)Additional function : Controls other functions such as system option, zero point adjustment.

Inspection

1. Remove the Oil Pressure & Oil Temperature Sensor.(Refer to Oil Pressure & Oil Temperature Sensor - "Removal")

2.After immersing the thermistor of the sensor into engine oil, measure resistance between the sensor terminals 1 and 4.

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

- Removal

1.Turn the ignition switch OFF and disconnect the battery negative (-) terminal.

2.Remove the intake manifold.(Refer to Engine Mechanical System - "Intake Manifold")

3. After disconnectting the oil pressure & oil temperature sensor connector (A), remove the oil pressure & oil temperature sensor (B).

Tightening torque :35.3 - 38.2 N.m (3.6 - 3.9 kgf.m, 26.0 - 28.2 lb-ft)

- Installation

1.Install in the reverse order of removal.

• Install the component to the specified torques.

• Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.

• Apply sealant to thread when refitting.

Specification : TB2403

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