Servicing the Electrical System
WARNING: This page is about a different car, the 2021 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.
- Prior to servicing the electrical system, make sure to turn off the ignition switch and disconnect the battery ground cable.NOTE:
- In the course of MFI or ELC system diagnosis, when the battery cable is removed, any diagnostic trouble code retained by the computer will be cleared. There fore, if necessary, record the diagnostic data before removing the battery cable.
- Fix the wiring harnesses with clamps so that there is no slack wiring. However, for any harness which passes the engine or other vibrating parts of the vehicle, allow some slack within a range that does not allow the engine vibrations to cause the harness to come into contact with any of the surrounding parts and then secure the harness by using a clamp.
- If any section of a wiring harness interferes with the edge of a part, or a corner, wrap the section of the harness with tape or something similar in order to protect it from damage.
- When installing any parts, be careful not to pinch or damage any of the wiring harness.
- Never throw relays, sensors or electrical parts, or expose them to strong shock.
- The electronic parts used in the computer, relays, etc. are easily damaged by heat. If there is a need for service operations that may cause the temperature to exceed 80°C (176°F), remove the electronic parts beforehand.
- Loose connectors may cause malfunction. Make sure that the connectors are always securely fastened.
- When disconnecting a connector, be sure to grip only the connector, not the wires.
- Disconnect connectors which have catches by pressing in the direction of the arrows shown in the illustration.
- Connect connectors which have catches by inserting the connectors until they make a clicking sound.
- When using a circuit tester to check continuity or voltage on connector terminals, insert the test probe into the harness side. If the connector is a sealed connector, insert the test probe through the hole in the rubber cap until the probe contacts the terminal, being careful not to damage the insulation of the wires.
- To avoid overloading the wiring, take into consideration the electrical current load of the optional equipment when determining the appropriate wire size.
Recommended size SAE gauge No Permissible current In engine compartment Other areas 0.3mm2 AWG 22 - 5A 0.5mm2 AWG 20 7A 13A 0.85mm2 AWG 18 9A 17A 1.25mm2 AWG 16 12A 22A 2.0mm2 AWG 14 16A 30A 3.0mm2 AWG 12 21A 40A 5.0mm2 AWG 10 31A 54A