Hyundai Santa Fe: Automatic Transaxle Control System / Transaxle Control Module (TCM). Repair procedures

Hyundai Santa Fe (TM) 2019-2025 Service Manual / Automatic Transaxle System (SBC) / Automatic Transaxle Control System / Transaxle Control Module (TCM). Repair procedures

Inspection

TCM ground circuit test : Measure the resistance between TCM and chassis ground.

(Inspect the terminal connected to the chassis ground with the back of harness connector as the inspection point of TCM side.)

Specification : Below 1Ω

2.	TCM connector test : Disconnect the TCM connector and visually check the ground terminals on TCM side and harness side for bent pins or poor contact pressure.

3.	If problem is not found in Steps 1 and 2, the TCM could be faulty. If so, replace the TCM with a new one, and then check the vehicle again. If the vehicle operates normally then the problem was likely with the TCM.

4.	Reinspection of original TCM : Install the original TCM (probably broken) into a known-good vehicle and check the vehicle. If the problem occurs again, replace the original TCM with a new one. If the problem does not reoccur, this is an intermittent problem and other part may be faulty.

Removal

1.	Perform the oil pressure characteristics backup procedure using the diagnostic tool when replacing with a new TCM.

2.	Turn ignition switch OFF and disconnect the negative (-) battery cable.

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

Remove the TCM.

1)	Disconnect the TCM connector (A).

2)	Pull the clip (A) and then removing the TCM (B).

Installation

1.	To install, reverse the removal procedure.

Oil-pressure characteristics input (TCM exchange)

•	In order to avoid any problem including sense of starting delay of the transaxle and shock at acceleration and vehicle start, make sure to process learning for TCM after replacing the transaxle / TCM. (Refer to Automatic Transaxle Control System - "Repair Procedures")

•	Since TCM and ECM are integrated, perform the procedures related in the ECM after replacing the TCM. (Refer to Engine Control / Fuel System - "Engine Control Module (ECM)")

Transaxle Control Module (TCM). Schematic diagrams

TCM Connector and Terminal Function TCM Terminal Function Connector [A] Pin No Description Connected to 1 Power ground Chassis Ground 2 - - 3 - - 4 - - 5 - - 6 Fuel Sender Signal Fuel Sender 7 - - 8 - - 9 - - 10 - - 11 - - 12 - - 13 - - 14 - - 15 Stop Lamp Signal Stop Lamp 16 Brake Test Switch Brake Switch 17 18 - 19 - 20 Output Speed (Supply) ATM Solenoid Valve (Otput Speed) 21 Input Speed (Supply) ATM Solenoid Valve (Input Speed) 22 - - 23 - - 24 - - 25 - - 26 - - 27 [A/T] SOL...

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...

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