Hyundai Palisade: Automatic Transaxle Control System / Oil Temperature Sensor (Main Harness)

Hyundai Palisade (LX2) 2020-2024 Service Manual / Automatic Transaxle System (A8LF1) / Automatic Transaxle Control System / Oil Temperature Sensor (Main Harness)

Specifications
Specification
▷ 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
1.120
(60) 140.0
0.612
(80) 176.0
0.329
(100) 212.0
0.186
(120) 248.0
0.109
(140) 284.0
0.067
(150) 302.0
0.053

Hyundai Palisade. Specifications

Description and operation
Description
The sensor used is a thermistor (NTC) in which resistance changes with temperature variation.
Transmission oil temperature sensor monitors the automatic transmission fluid's temperature and conveys the readings to TCM.
When the TCM supplies about 5 V of power to sensor, the sensor output value changes depending on ATF temperature.
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 perform hydraulic amendment control during gear changes.
Oil temperature sensor is installed on the valve body and is integrated with main harness.

Hyundai Palisade. Description and operation

Schematic diagrams
Circuit Diagram

Hyundai Palisade. Schematic diagrams

Repair procedures
Inspection
Hyundai Palisade. Repair procedures   
Refer to the DTC manual for the check procedure.
Removal
Hyundai Palisade. Repair procedures   
Be careful not to damage the parts located under the vehicle (floor under cover, fuel filter, fuel tank and canister) when raising the vehicle using the lift.
(Refer to General Information - "Lift and Support Points")
When the solenoid valve Diagnostic Trouble Codes (DTC) is on, perform the following procedure to replace it.
Automatic transaxle is composed of delicate components. Be careful not to cause any damage on the component in the course of assembly and disassembly.
Maintain clean condition so that foreign substance does not get into the automatic transaxle.
Use a coated apron, latex gloves, and stainless tray to prevent foreign substance from getting into the transaxle.
Automatic transaxle fluid (ATF) can be reused. Collect it using a clean 10-liter beaker.
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the battery and battery tray.
(Refer to Engine Electrical System - "Battery")
3.
Remove the air duct and air cleaner assembly.
(Refer to Engine Mechanical System - "Air Cleaner")
4.
Remove the under cover.
(Refer to Engine Mechanical System - "Engine Room Under Cover")
5.
Drain the coolant.(If equipped ATF warmer)
(Refer to Engine Mechanical System - "Coolant")
6.
Loosen the drain plug (A) and reinstall the drain plug after draining ATF totally.
Tightening torque :
33.3 - 43.1 N.m (3.4 - 4.4 kgf.m, 24.6 - 31.8 lb-ft)

Hyundai Palisade. Repair procedures

Hyundai Palisade. Repair procedures   
Replace the gasket before reinstalling the drain plug.
7.
Loosen the fixing bolt (A) and then removing the bracket.
Tightening torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Hyundai Palisade. Repair procedures

8.
Loosen the fixing bolts (A) and then removing the bracket.
Tightening torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Hyundai Palisade. Repair procedures

9.
Separate the ATF cooler hose (A).

Hyundai Palisade. Repair procedures

Hyundai Palisade. Repair procedures   
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.
10.
Loosen the upper bolts (A) of the valve body cover.
Tightening torque :
11.8 - 13.7 N.m (1.2 - 1.4 kgf.m, 8.7 - 10.1 lb-ft)

Hyundai Palisade. Repair procedures

11.
Loosen the bolts and then removing 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)
Hyundai Palisade. Repair procedures   
Be careful when removing the valve body cover because the remaining ATF remains in the valve body cover.

Hyundai Palisade. Repair procedures

Hyundai Palisade. Repair procedures   
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.

Hyundai Palisade. Repair procedures

12.
Loosen the bolts and then separate the main harness (A).
Tightening torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb-ft)

Hyundai Palisade. Repair procedures

13.
Loosen the bolts and then removing the valve body assembly (A).
Tightening torque :
(A) 9.8 - 11.8 N.m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb-ft)

Hyundai Palisade. Repair procedures

Hyundai Palisade. Repair procedures   
Attach the manual pin (B) to the detent lever (A) and assemble the valve body.

Hyundai Palisade. Repair procedures

14.
Disconnect the speed sensor connector (A).

Hyundai Palisade. Repair procedures

15.
Disconnect the main connector (A).

Hyundai Palisade. Repair procedures

16.
Loosen the bolt and then removing the fixing of clip (A).
Tightening torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb-ft)
17.
Remove the main connector (B) by pushing it downward.

Hyundai Palisade. Repair procedures

Hyundai Palisade. Repair procedures   
Replace the O-Ring (A) before reinstalling solenoid valve connector.

Hyundai Palisade. Repair procedures

Installation
1.
To install, reverse the removal procedure.
2.
Inject the automatic transaxle oil and inspect the oil level.
(Refer to Automatic Transaxle System - "Automatic Transaxle Fluid")
Hyundai Palisade. Repair procedures   
After ATF level check or exchange, be sure to remove residual ATF on transaxle case.
(Be especially sure to remove residual ATF between automatic transaxle case and valve body cover)

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