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.
2021 Hyundai Veloster 2.0, Automatic TransFACTORY OEM SERVICE PROCEDURE
TCM Terminal Function
| Connector [A] | Connector [K] | ||
|---|---|---|---|
| Pin | Description | Pin | Description |
| A1 | Overdrive clutch control solenoid valve (OD/C_VFS) | K8 | FLEXRAY COMM. Signal HIGH |
| A5 | Torque converter control solenoid (T/CON_VFS) | K25 | FLEXRAY COMM. Signal LOW |
| A6 | Pressure control solenoid (VFS-LINE) | K59 | CCP CAN LOW |
| A7 | 26 brake control solenoid valve (26/B_VFS) | K60 | CAN (LOW) |
| A8 | Inhibitor switch signal "S2" | K76 | CCP CAN HIGH |
| A9 | Sports mode down switch | K77 | CAN (HIGH) |
| A10 | Sports mode up switch | ||
| A22 | Underdrive brake control solenoid valve (UD/B_VFS) | ||
| A26 | 35R clutch control solenoid valve (35R/C_VFS) | ||
| A27 | Inhibitor switch signal "S1" | ||
| A30 | Sports mode select switch | ||
| A43 | Solenoid power 1 (A1, A5, A26, A48) | ||
| A44 | Solenoid power 2 (A6, A7, A22, A47) | ||
| A45 | GND (Power) | ||
| A46 | GND (Power) | ||
| A48 | ON/OFF solenoid valve A (SS-A) | ||
| A49 | Oil temperature sensor (-) | ||
| A64 | VB (Battery voltage) | ||
| A68 | Shift lock solenoid control | ||
| A70 | Inhibitor switch signal "S3" | ||
| A72 | Input speed sensor signal | ||
| A73 | Output speed sensor power | ||
| A85 | VB (Battery voltage) | ||
| A91 | Oil temperature sensor (+) | ||
| A92 | Output speed sensor signal | ||
| A93 | Inhibitor switch signal "S4" | ||
| A94 | Input speed sensor power | ||
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.