Kia Forte: Engine Control System / Ambient Temperature Sensor (ATS)

Kia Forte 2019-2021 (BD) Service Manual / Engine Control / Fuel System / Engine Control System / Ambient Temperature Sensor (ATS)

Specifications
Specification

Temperature[⁰C(⁰F)]
Resistance(kΩ)
-40(-40)
811.1 - 956.8
-20(-4)
255.6 - 287.7
0(32)
91.5 - 98.8
20(68)
36.6 - 38.0
30(86)
23.8 - 24.7
40(104)
15.7 - 16.6
50(122)
10.6 - 11.3
60(140)
7.2 - 7.9
80(176)
3.6 - 4.0

Description and operation
Description

Ambient Temperature Sensor (ATS) is installed on the front-end module and senses the ambient temperature. ECM receives not only the intake air temperatue but also the ambient air temperature informations at the same time to control the intake air quantity precisely provided through the turbo charger. The electrical resistance of the thermistor decreases as the temperature increases, and increases as the temperature decreases This sensor has a Negative Temperature Coefficient (NTC) and its resistance is in inverse proportion to the temperature.

Repair procedures
Inspection
1.

Turn the ignition switch OFF.

2.

Disconnect the ATS connector.

3.

Measure resistance between the ATS terminals 1 and 2.

4.

Check that the resistance is within the specification.

Temperature[⁰C(⁰F)]
Resistance(kΩ)
-40(-40)
811.1 - 956.8
-20(-4)
255.6 - 287.7
0(32)
91.5 - 98.8
20(68)
36.6 - 38.0
30(86)
23.8 - 24.7
40(104)
15.7 - 16.6
50(122)
10.6 - 11.3
60(140)
7.2 - 7.9
80(176)
3.6 - 4.0

Removal & Installation
1.

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

2.

Remove the engine room under cover.

(Refer to Engine Mechanical System - " Engine Room Under Cover")

3.

Disconnect the connector and then remove the ambient temperature sensor (A).

4.

Install in the reverse order of removal.

  

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

Intake Air Temperature Sensor (IATS)
Specifications Specification Temperature Resistance (kΩ) °C °F -40 -40 40.93 - 48.35 ...

Boost Pressure Sensor (BPS)
Specifications Specification Pressure [kPa (kg/cm² / psi)] Output Voltage (V) [Vref=5V] 32.5 (0.33, 4.71) 0.5 ...

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