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
1. Make sure vehicle does not roll before setting room side shift lever and T/M side manual control lever to "N" position. 2. Remove the battery and the bat ...

Installation
1. Installation is the reverse of removal. 2. Use a SST (09581-11000) when installing the brake caliper assembly. 3. After installation, bleed ...

Vehicle certification label
The vehicle certification label attatched on the drivers side center pillar gives the vehicle identification number (VIN). ...

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