Hyundai Tucson: Automatic Transaxle Control System / Transaxle Control Module (TCM) Repair procedures

Replacement
1.
Turn ignition switch OFF.
2.
Disconnect the negative (-) battery cable.
3.
Remove the battery.
(Refer to Engine Electrical System - "Battery")
4.
Disconnect the TCM extension connector (A).

5.
Remove the TCM (A) after removing the mounting bolts and nut.

TCM installation bolt/nut:
9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Inspection
TCM Problem Inspection Procedure
1.
TEST TCM GROUND CIRCUIT: Measure resistance between TCM and chassis ground using the backside of TCM harness connector as TCM side check point. If the problem is found, repair it.

Specification: Below 1x

2.
TEST TCM CONNECTOR: Disconnect the TCM connector and visually check the ground terminals on TCM side and harness side for bent pins or poor contact pressure. If the problem is found, repair it.
3.
If problem is not found in Step 1 and 2, the TCM could be faulty. If so, make sure there were no DTC's before swapping the TCM with a new one, and then check the vehicle again. If DTC's were found, examine this first before swapping TCM.
4.
RE-TEST THE ORIGINAL TCM: Install the original TCM (may be broken) into a known-good vehicle and check the vehicle. If the problem occurs again, replace the original TCM with a new one. If problem does not occur, this is intermittent problem (Refer to “Intermittent Problem Inspection Procedure” in Basic Inspection Procedure).
Installation
1.
Install in the reverse order of removal.
   
In the case of the vehicle equipped with immobilizer or button engine start system, perform "Key Teaching" procedure together.
(Refer to Body Electrical System - "Immobilizer System")
Perform TCM learning after replacing the transaxle to prevent slow transaxle response, jerky acceleration and jerky startup.
(Refer to Automatic Transaxle Control System - "Repair procedures")
Transaxle Control Module (TCM) Schematic Diagrams
1. TCM Connector and Terminal Function 2. TCM Terminal Function Connector [A] PinDescriptionPinDescription1-54-2-55-3-56-4-57-5-58Sport mode down switch6-59Oil temperature sensor (+)7-60-8-61-9-6 ...

Transaxle Oil Temperature Sensor Description and Operation
Description Transmission Oil Temperature Sensor monitors the automatic transmission fluid's temperature and conveys the readings to TCM. It is an NTC (Negative Thermal Coefficient) sensor whose ...

Other information:

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