Hyundai Genesis: Automatic Transmission Control System / Transmission Control Module (TCM) Repair procedures

Removal

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

2.	Remove the cover (A).

3.	Disconnect the ECM connector (A), TCM connector (B) and IDB connector (C).

4.	Remove the TCM & ECM & IDB after removing the bolts (A) and nut (B). Tightening torque : 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 nuts (A).

Installation

1.	Install in the reverse order of removal. • After replacing TCM, input the EOL (End of line). (Refer to automatic transmission system - "Repair procedures") • Perform the TCM adaptive values learning procedure. (Refer to Automatic Transaxle Control System - "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 1?

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 any problems are not found in Step 1 and 2, the TCM could be faulty. If so, make sure there are no DTCs before replacing the TCM with a new one, and then check the vehicle again. If DTCs are found, examine this first before replacing TCM.

4.

RE-TEST THE ORIGINAL TCM: Install the original TCM (with possible fault) 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 an intermittent problem (Refer to “Intermittent Problem Inspection Procedure” in Basic Inspection Procedure).

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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