Hyundai Creta: Automatic Transaxle Control System / Transaxle Oil Temperature Sensor

Description and operation

Description
Transaxle oil temperature sensor monitors the automatic transaxle fluid's temperature and conveys the readings to TCM.
It is an NTC (Negative Thermal Coefficient) sensor whose resistance has an inversely proportional relationship with the temperature level.
Data produced by this sensor is used to identify damper clutch activation and deactivation zones within the low temperature and high temperature range and to compensate hydraulic pressure levels during gear changes.

Specifications

Specifications
▷ Type: Negative Thermal Coefficient Type
Temp. [(°C)°F]
Resistance (kΩ)
(-40) -40
48.1
(-20) -4.0
15.6
(0) 32.0
5.88
(20) 68.0
2.51
(40) 104.0
1.19
(60) 140.0
0.61
(80) 176.0
0.32
(100) 212.0
0.18
(120) 248.0
0.11
(140) 284.0
0.07
(160) 320.0
0.04

Schematic diagrams

Circuit Diagram

Repair procedures

Inspection
1.
Turn ignition switch OFF.
2.
Remove the battery and battery tray.
3.
Disconnect the solenoid valve connector (A).

4.
Measure resistance between sensor signal terminal and sensor ground terminal.
5.
Check that the resistance is within the specification.
  
If DTC about the input/output speed sensor is found, replace according to the procedures removal/installation.
Removal
1.
Remove the valve body assembly.
(Refer to Valve body System - "Valve Body")
2.
Disconnect the input & output speed sensor connector (A).
3.
Loosen the main connctor bolt (B).
Tightening torque :
9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

4.
Disconnect the solenoid valve connector (A).
(1)
Press the lock
(2)
Pull up lever

5.
Remove the solenoid valve connector mounting clip (A).

6.
Remove the solenoid valve connector (A) by pushing down from the transaxle.

  
Replace the O-Ring (A) before reinstalling solenoid valve connector.

Installation
1.
To install, reverse the removal procedure.
2.
Check fluid level, after filling the automatic transaxle with fluid.
(Refer to Hydraulic System - "Fluid")
Transaxle Control Module (TCM)
Description and operation Description • Monitoring the vehicle's operating conditions to determine the optimal gear setting. • ...

Input Speed Sensor
Description and operation Description • Input speed sensor uses an electric current type hall sensor in which the current is changed by the magnetic variation. ...

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