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.
2020 Kia Optima EXFACTORY OEM SERVICE PROCEDURE
Components And Components Location: Components
WARNING: This page is about a different car, the 2020 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.
| NO | Connector A | Connector B | Connector C | Connector D |
|---|---|---|---|---|
| 1 | Batt (+) | Front wiper switch | P CAN (low) | - |
| 2 | IGN 1 | Rear wiper switch | P CAN (high) | PAS Switch indicator |
| 3 | IGN 2 | Front wiper int vol switch | PDW buzzer | Heated steering indicator |
| 4 | Key in switch | Fog lamp switch | Front wiper low relay | - (Low-side_LED) |
| 5 | Front wiper switch (Low) | Auto light power | - (Low-side) | - (UIP) |
| 6 | Rear wiper switch | NTS sensor | - (Low-side) | Wiper relay (High) |
| 7 | - (Active '- H) | - (Active '- L, Wake - up)) | Front wiper high relay | Key solenoid |
| 8 | Wiper parking switch | B CAN (low) | FPAS power | Rear seat belt indicator (RH) |
| 9 | - (Active '- H) | B CAN (high) | FPAS power | Rear seat belt indicator (Center) |
| 10 | - (Active '- H) | Passenger seat belt | PAS power | Rear seat belt indicator (LH) |
| 11 | - (Active '- L, Wake - up)) | - (Active '- L, Wake - up)) | Heated steering power | ATM solenoid |
| 12 | ACC | - (Active '- N, Wake - up)) | GND | PAS (LIN) |
| 13 | Front washer switch | - (Active '- N, Wake - up)) | Rear wiper relay | Rain sensor (LIN) |
| 14 | Brake switch | Light switch | Rear in folding relay | Wiper relay (Low) |
| 15 | - (Active '- L, Wake - up)) | Head lamp switch | - (Low-side) | - (Safety power window ECU) |
| 16 | Steering heater switch | Auto light power | - (Low-side) | Room lamp |
| 17 | Sunroof open switch | Crash signal | - (Low-side) | - (Low-side) |
| 18 | Sunroof open switch | - | NTS GND | |
| 19 | PAS Input | Auto light ground | Multifunction switch GND | |
| 20 | Rear defog switch | Safety power window Enable (high) | IGN 2 Heated steering power | |
| 21 | Key interlock | - | ||
| 22 | GND | - |
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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