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
Terminal Function
| Pin No | Description | Current 12V/20C (AMP) | Voltage range (V) |
|---|---|---|---|
| 1 | Voltage supply for pump motor | ≤ 34 | 0 - 18 |
| 2 | Brake light switch | ≤ 22m | 0 - 18 |
| 4 | FR Wheel speed sensor power | - | 0 - 18 |
| 6 | IGN 1 | ≤ 10m | 0 - 18 |
| 10 | C-CAN low | 44m typ. | 0 - 18 |
| 11 | C-CAN high | 44m typ. | 0 - 18 |
| 12 | HAC control | - | 0 - 18 |
| 13 | Ground for recirculation pump | - | - |
| 18 | L-CAN low | 44m typ. | 0 - 18 |
| 19 | L-CAN high | 44m typ. | 0 - 18 |
| 25 | Voltage supply for solenoid valves | ≤ 17 | 0 - 18 |
| 26 | FR Wheel speed sensor ground | ≤ 34m | 0 - 18 |
| 27 | FR Wheel speed sensor signal | ≤ 34m | 0 - 18 |
| 28 | ESS control | - | 0 - 18 |
| 29 | RL Wheel speed sensor signal | ≤ 34m | 0 - 18 |
| 30 | RL Wheel speed sensor ground | ≤ 34m | 0 - 18 |
| 32 | VDC switch | ≤ 18m | 0 - 18 |
| 33 | RR Wheel speed sensor signal | ≤ 34m | 0 - 18 |
| 34 | RR Wheel speed sensor ground | ≤ 34m | 0 - 18 |
| 35 | Parking brake switch | ≤ 18m | 0 - 18 |
| 36 | FL Wheel speed sensor signal | ≤ 34m | 0 - 18 |
| 37 | FL Wheel speed sensor ground | ≤ 34m | 0 - 18 |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.