Hyundai Elantra: Automatic Transaxle Control System / Transaxle Oil Temperature Sensor 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 air cleaner assembly and air duct.
(Refer to Engine Mechanical System - "Air cleaner")
2.
Remove the drain plug (A) and drain the ATF totally and then reinstall the drain plug.

   
Replace the gasket before reinstalling the drain plug.
After the installation, start the engine and then check if there are any leakages from the drain plug.
3.
Remove the wiring mounting clip (A).
4.
Disconnect the air breather hose (B) from the valve body cover.

Tightening torque :
9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

5.
Disconnect the hose (A) after removing the automatic transaxle fluid cooler hose clamp.

   
Carefully install the clamp not to damage the hose.
Install the clamp in a correct direction not to be interfered with other parts.
After the installation, start the engine and then check if there are any leakages from the hose.
6.
Disconnect the ATF warmer hose (A).
7.
Remove the mounting bolt of the heater pipe.

   
Carefully install the clamp not to damage the hose.
Install the clamp in a correct direction not to be interfered with other parts.
After the installation, start the engine and then check if there are any leakages from the hose.
8.
Remove the valve body cover (A).

Tightening torque :
11.8 ~ 13.7 N.m (1.2 ~ 1.4 kgf.m, 8.7 ~ 10.1 lb-ft)

   
Replace the gasket (A) before reinstalling the valve body cover.

After the installation, start the engine and then check if there are any leakages from the valve body cover.
9.
Disconnect the oil temperature sensor and solenoid valve connector (A) from the valve body.

Tightening torque :
9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

   
Check for the looseness, poor connection, bending, corrosion, contamination, deterioration, or damage before reinstalling the solenoid valve connector.
10.
Remove the valve body assembly (A).

Tightening torque :
9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

11.
Disconnect the input & output speed sensor connector (A).

12.
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)

13.
Disconnect the solenoid valve connector (A).

14.
Remove the solenoid valve connector mounting clip (A).

15.
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 Oil Temperature Sensor Schematic Diagrams
Circuit Diagram ...

Input Speed Sensor Description and Operation
Description Input speed sensor is a vital unit that measures the rate of rotation of the input shaft inside the transaxle and delivers the readings to the TCM. The sensor provides critical inpu ...

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