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Hyundai Equus Manuals

Hyundai Equus: Transmission Control Module (TCM) Repair procedures - Automatic Transmission Control System - Automatic Transmission System (SBC) - Hyundai Equus VI 2009-2025 Service ManualHyundai Equus: Transmission Control Module (TCM) Repair procedures

Second generation VI (2009–2025) / Hyundai Equus VI 2009-2025 Service Manual / Automatic Transmission System (SBC) / Automatic Transmission Control System / Transmission Control Module (TCM) Repair procedures

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).
Replacement
1.
Turn ignition switch OFF.
2.
Disconnect the negative (-) battery cable.
3.
Disconnect the ECM connector (A) and TCM connector (B).
4.
Remove the TCM & ECM after removing the bolts (C) and nut (D).
TCM installation bolt/nut:
9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

5.
Remove the TCM (B) after removing the bolts (A).

Installation
1.
Installation is reverse of removal.
   
A.
In the case of the vehicle equipped with immobilizer or button engine start system, perform "Key Teaching" procedure together. (Refer to "Immobilizer" or "Button Engine Start System in BE group).
B.
After exchanging TCM, input the EOL (End of line).
(Refer to "Repair procedures" in this group)
C.
When replacing the TCM, reset the automatic transmissions values by using the GDS.
D.
Perform TCM learning after replacing the TCM.

    Transmission Control Module (TCM) Schematic Diagrams
    1. TCM Connector and Terminal Function 2. TCM Terminal Function Connector PinDescriptionPinDescription1Battery power48-2Battery power49-3Power(IG 1)5027 Brake control solenoid valve4Ground51-5G ...

    Transmission 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 ...

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