Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Kia Forte LX, Automatic TransFACTORY OEM SERVICE PROCEDURE
TCM Terminal Function
Connector (CHG-A)
TCM CONNECTOR DESCRIPTION CHART
| Pin | Description |
|---|---|
| 1 | - |
| 2 | - |
| 3 | Line pressure control solenoid valve (LINE_VFS) |
| 4 | Torque converter control solenoid valve (T/CON_VFS) |
| 5 | 35R clutch control solenoid valve (35R/C_VFS) |
| 6 | Input speed sensor power |
| 7 | Output speed sensor power |
| 8 | Input speed sensor signal |
| 9 | Output speed sensor signal |
| 10 | - |
| 11 | - |
| 12 | - |
| 13 | - |
| 14 | - |
| 15 | - |
| 16 | - |
| 17 | Underdrive brake control solenoid valve (UD/B_VFS) |
| 18 | 26 brake control solenoid valve (26/B_VFS) |
| 19 | Shift lock solenoid |
| 20 | Overdrive clutch control solenoid valve (OD/C_VFS) |
| 21 | - |
| 22 | Rear lamp relay |
| 23 | - |
| 24 | Start relay |
| 25 | Inhibitor switch signal "S2" |
| 26 | Inhibitor switch signal "S3" |
| 27 | Inhibitor switch signal "S4" |
| 28 | - |
| 29 | - |
| 30 | - |
| 31 | - |
| 32 | ON/OFF solenoid valve B (SS-B) |
| 33 | ON/OFF solenoid valve A (SS-A) |
| 34 | Ground (Power 1) |
| 35 | Ground (Power 2) |
| 36 | Sports mode down switch |
| 37 | Sports mode up switch |
| 38 | Sports mode Select switch |
| 39 | - |
| 40 | Inhibitor switch signal "S1" |
| 41 | - |
| 42 | - |
| 43 | - |
| 44 | - |
| 45 | - |
| 46 | - |
| 47 | Solenoid supply power 1 |
| 48 | Solenoid supply power 2 |
| 49 | TCM Input power 1 (For solenoid) |
| 50 | TCM Input power 2 (For solenoid) |
| 51 | - |
| 52 | - |
| 53 | Oil temperature sensor (-) |
| 54 | Oil temperature sensor (+) |
| 55 | - |
| 56 | - |
| 57 | - |
| 58 | - |
| 59 | - |
| 60 | - |
Connector (CHG-K)
TCM CONNECTOR DESCRIPTION CHART
| Pin | Description | Pin | Description |
|---|---|---|---|
| 1 | Power ground | 5 | Power ground |
| 2 | Battery power (B+) | 6 | Battery power (B+) |
| 3 | Power ground | 77 | CAN communication line (HIGH) |
| 4 | Battery power (B+) | 78 | CAN communication line (Low) |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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