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 TurboFACTORY OEM SERVICE PROCEDURE
Components & Components Location: Components
| No | Connector A | Connector B | Connector C |
|---|---|---|---|
| 1 | - | GND_Power 2 | ESCL Enable_output |
| 2 | "P"_input/Clutch switch_input | LF search input ON_output | SSB IGN illumination _output |
| 3 | Brake switch_input | ESCL (-)_output | SSB ACC illumination _output |
| 4 | Start switch feedback_input | - | - |
| 5 | Battery (+)_signal | Passenger's door outside handle antenna _input | |
| 6 | - | GND_Power 1 | Driver's door outside handle antenna_output |
| 7 | - | - | Rear antenna _output |
| 8 | - | ESCL (+)_output | Bumper antenna output |
| 9 | - | - | Interior Antenna 2 GND _output |
| 10 | - | Battery (+)_power | Interior Antenna 1 GND_output |
| 11 | - | IMMO Antenna_output | |
| 12 | ESCL unlock switch_input | - | |
| 13 | Wheel speed sensor_input | Exterior Buzzer_output | |
| 14 | - | IGN1 Relay_output | |
| 15 | RPM_input | IGN2 Relay_output | |
| 16 | IGN 1 | ACC Relay_output | |
| 17 | ACC | Passenger's door outside handle power_output | |
| 18 | IGN 2 | Driver's door outside handle power output | |
| 19 | B CAN (Low) | Rear Antenna power_output | |
| 20 | B CAN (High) | Bumper antenna powoer_output | |
| 21 | C CAN (High) | Interior 2 Antenna power_output | |
| 22 | C CAN (Low) | Interior 1 Antenna power_output | |
| 23 | SSB switch2_input | ||
| 24 | Passenger's door outside handle switch _input | ||
| 25 | Driver's door outside handle switch (input) | ||
| 26 | SSB switch1_input | ||
| 27 | - | ||
| 28 | EMS_COM | ||
| 29 | ESCL_COM | ||
| 30 | Starter relay output | ||
| 31 | Start Stop Button (SSB) illumination (+)_output | ||
| 32 | Start Stop Button (SSB) illumination (-)_output |
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.