Hyundai Santa Cruz (NX4A OB) 2021-2025 Service Manual / Engine Control / Fuel System / Engine Control System / Ambient Temperature Sensor (ATS)

Hyundai Santa Cruz: Engine Control System / Ambient Temperature Sensor (ATS)

- Description Installed on the front-end module, the Ambient Temperature Sensor (ATS) senses the ambient temperature. ECM receives the intake air temperature and ambient air temperature at the same time to precisely control the intake air quantity supplied through the turbocharger. The electrical resistance of the thermistor decreases as the temperature increases, and vice versa. This sensor has a Negative Temperature Coefficient (NTC) and its resistance is in inverse proportion to the temperature.

- Specification

Ambient temperature [°C (°F)]	Resistance Min (kΩ)	Resistance Mid (kΩ)	Resistance Max (kΩ)
-40(-40)	811.09	881.03	956.78
-30(-22)	447.67	480.41	515.43
-20(-4)	255.63	271.21	287.67
-10(50)	150.71	158.18	165.98
0(32)	91.53	95.1	98.76
10(50)	57.14	58.8	60.49
20(68)	36.6	37.32	38.04
30(86)	23.8	24.26	24.73
40(104)	15.69	16.13	16.58
50(122)	10.57	10.95	11.34
60(140)	7.24	7.58	7.91
70(158)	5.08	5.34	5.61
80(176)	3.62	3.83	4.05

- Inspection

1. Switch "OFF" the ignition.

2. Disconnect the ATS connector.

3. Measure resistance between the ATS terminals 1 and 2.

4. Check that the resistance is within the specification.

Specification : Refer to "Inspection"

- Removal

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

2.Remove the front bumper.(Refer to Body - "Front Bumper Assembly")

3.Disconnect the ATS connector (A) and then remove the ATS (B).

- Installation

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

1. Install in the reverse order of removal.

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Engine Coolant Temperature Sensor (ECTS)

- Description Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head for detecting the engine coolant temperature.The electrical resistance of th ...

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