Kia Rio: Automatic Transaxle Control System / Transaxle Oil Temperature Sensor

Kia Rio 2017-2020 YB Service Manual / Automatic Transaxle System / Automatic Transaxle Control System / Transaxle Oil Temperature Sensor

Specifications
Specification

Item
Specification
Type
*NTC thermistor
Temp.[(°C)°F] / Resistance (kΩ)
(-40)-40 / 139.5
(-20)-4.0 / 47.4
(0)32.0 / 18.6
(20)68.0 / 8.1
(40)104.0 / 3.8
(60)140.0 / 1.98
(80)176.0 / 1.08
(100)212.0 / 0.63
(120)248.0 / 0.38
(140)284.0 / 0.25
(160)320.0 / 0.16

*NTC : Negative Temperature Coefficient

Description and operation
Description

The sensor used is a thermistor (NTC) in which resistance changes with temperature variation.

Oil temperature sensor is installed on the valve body integrated with a main harness.

Functions

Transaxle oil temperature sensor monitors the temperature of ATF and conveys the readings to TCM.

Data produced by this sensor is used to identify torque converter clutch activation and deactivation zones within the low temperature and high temperature range and to compensate hydraulic pressure levels during gear changes.

Schematic diagrams
Circuit Diagram

Repair procedures
Inspection
1.

Switch "OFF" ignition.

2.

Remove the air cleaner.

(Refer to Engine Mechanical System - "Air cleaner")

3.

Disconnect the main connector (A).

4.

Measure the resistance between + terminal (6) and - terminal (5).

5.

Check that the resistance is within the specification.

Item
Specification
Type
*NTC thermistor
Temp.[(°C)°F] / Resistance (kΩ)
(-40)-40 / 139.5
(-20)-4.0 / 47.4
(0)32.0 / 18.6
(20)68.0 / 8.1
(40)104.0 / 3.8
(60)140.0 / 1.98
(80)176.0 / 1.08
(100)212.0 / 0.63
(120)248.0 / 0.38
(140)284.0 / 0.25
(160)320.0 / 0.16

*NTC : Negative Temperature Coefficient

Removal
1.

Remove the valve body assembly.

(Refer to Hydraulic System - "Valve Body")

2.

Remove the main harness (A) after removing the clip (B).

Installation
1.

Install in the reverse order of removal.

Transaxle Control Module (TCM)
Description and operation Description The module receives and processes signals from various sensors and implements a wide range of transaxle controls to ensure optimal driving conditi ...

Input Speed Sensor
Specifications Specification Item Specification Type Hall effect sensor Current 22 mA (Max) ...

Other information:

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