Hyundai Santa Fe (TM): Automatic Transaxle System (SBC) / Automatic Transaxle Cooling System

Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual / Automatic Transaxle System (SBC) / Automatic Transaxle Cooling System

Description and operation

Description

•	Engine coolant is used for circulating heat in order to heat and cool the transaxle oil.

•	Prevents over heating of the transaxle oil while the vehicle is moving.

Coolant Flow

Oil Cooler. Repair procedures

Repair procedures

•	ATF cooler is a unit with the radiator, so refer to radiator removal/installation procedures in the engine section.

ATF Warmer. Description and operation

Description

The ATF warmer is mounted on the valve body cover to reduce oil viscosity friction by increasing oil temperature under cold condition, which in turn improves fuel efficiency. It is serial mounted on the entry of the Electronic Throttle Controller (ETC), as shown in the diagram, and minimizes the effects of cabin heating system.

•	Engine coolant is used for circulating heat in order to heat and cool the transaxle oil.

•	Rapidly elevates the transaxle oil temperature during the initial cold start of the engine.

•	Prevents over heating of the transaxle oil while the vehicle is moving.

•	Transaxle oil warm-up and cooling can be done with a single system.

•	The water coolant and oil are separate in order to exchange heat.

ATF Warmer. Repair procedures

Removal

•	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")

1.	Remove the air cleaner assembly. (Refer to Engine Mechanical System - "Air Cleaner")

2.	Remove the engine room under cover. (Refer to Engine Mechanical System - "Engine Room Under Cover")

3.	Loosen the drain plug (A) and then drain the coolant.

4.	Separate the clamp and then removing the ATF cooler hose (A).

5.	Loosen the ATF wamer upper mounting bolts (A).

6.	Separate the clamp and then removing the coolant hose (A).

7.	Loosen the ATF wamer lower mounting bolts and then removing the ATF warmer (A).

Installation

•	Carefully install the clamp not to damage the hose.

•	Align marking of pipe, marking of hose, and matching color each other.

1.	To install, reverse the removal procedure.

Check the ATF level after refilling the automatic transaxle with fluid.

(Refer to Automatic Transaxle System - "Automatic Transaxle Fluid")

1)	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)

2)	After installing the valve body cover, make sure to check the oil leakage at the connection area with the engine ON.

3.	Refil the coolant. (Refer to Engine Mechanical System - "Coolant")

❮SS-A Solenoid Valve (ON/OFF). Repair procedures

Inspection • Refer to the DTC manual for the check procedure.

Automatic Transaxle Control System❯

Other information:

Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual: General safety information and caution

Instructions (R-134a) When Handling Refrigerant 1. R-134a liquid refrigerant is highly volatile. A drop on the skin of your hand could result in localized frostbite. When handling the refrigerant, be sure to wear gloves.

Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual: Photo Sensor. Repair procedures

Inspection 1. Emit intensive light toward the photo sensor using a lamp, and check the output voltage change. 2. The voltage will rise with higher intensive light and reduce with lower intensive light.