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 Hyundai Tucson GL, Automatic TransFACTORY OEM SERVICE PROCEDURE
Connector [CHG-A]
TCM TERMINAL FUNCTION (CONNECTOR CHG-A)
| Pin | Description | Pin | Description |
|---|---|---|---|
| 1 | - | 31 | - |
| 2 | - | 32 | Shift solenoid F (SS-B) |
| 3 | Pressure control solenoid A (VFS-LINE) | 33 | Shift solenoid E (SS-A) |
| 4 | Torque Converter Clutch solenoid (VFS-T/Con) | 34 | Ground (Power 1) |
| 5 | Shift solenoid C (35R_VFS) | 35 | Ground (Power 2) |
| 6 | Input speed sensor power | 36 | Sports mode down switch |
| 7 | Output speed sensor power | 37 | Sports mode up switch |
| 8 | Input speed sensor signal | 38 | Sports mode Select switch |
| 9 | Output speed sensor signal | 39 | - |
| 10 | - | 40 | Inhibitor switch signal (S1) |
| 11 | - | 41 | - |
| 12 | - | 42 | - |
| 13 | - | 43 | - |
| 14 | - | 44 | - |
| 15 | - | 45 | - |
| 16 | - | 46 | - |
| 17 | Shift solenoid A (VFS-UD) | 47 | Solenoid supply power 1 |
| 18 | Shift solenoid B (VFS-26) | 48 | Solenoid supply power 2 |
| 19 | Shift lock solenoid | 49 | TCM Input power 1 (For solenoid) |
| 20 | Shift solenoid D (VFS-OD) | 50 | TCM Input power 2 (For solenoid) |
| 21 | - | 51 | Reserved |
| 22 | Rear lamp relay | 52 | Reserved |
| 23 | - | 53 | Oil temperature sensor (-) |
| 24 | Start relay | 54 | Oil temperature sensor (+) |
| 25 | Inhibitor switch signal (S2) | 55 | - |
| 26 | Inhibitor switch signal (S3) | 56 | - |
| 27 | Inhibitor switch signal (S4) | 57 | - |
| 28 | - | 58 | - |
| 29 | - | 59 | - |
| 30 | - | 60 | - |
Factory Service Tools
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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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