Kia Optima: Inspection - Transaxle Control Module (TCM). Repair procedures - Automatic Transaxle Control System - Automatic Transaxle System - Kia Optima TF 2011-2023 Service ManualKia Optima: 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 1Ω
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).

Transaxle Control Module (TCM). Repair procedures
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Replacement
1. Turn ignition switch OFF. 2. Disconnect the negative (-) battery cable. 3. Disconnect the TCM connector (A). 4. Re ...

See also:

Removal
Parking Brake Pedal [Foot type] 1. Turn ignition OFF and disconnect the negative (-) battery cable. 2. Remove the crash pad lower panel and reinforcing panel. (Refer t ...

Disarmed stage
The system will be disarmed when: Transmitter - The door unlock button is pressed. - The engine is started. (within 3 seconds) - The ignition switch is in the ON position for 30 seconds or ...

Interior Trim. Components and Components Location
Components 1. Front pillar trim 2. Center pillar upper trim 3. Center pillar lower trim 4. Rear pillar trim 5. Cowl side trim 6. Front door scuff trim 7. Rea ...

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