Hyundai Ioniq: Audio / Antenna. Repair procedures
Antenna Cable
1. | Check for continuity between the center poles of antenna cable. 
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2. | Check for continuity between the outer poles of antenna cable. There should be continuity. 
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3. | If there is no continuity, replace the antenna cable. |
4. | If there is no continuity, replace the antenna amplifier. |
5. | Check for continuity between the center pole (A) and outer pole (B) of antenna cable. There should be no continuity. 
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6. | If there is continuity, replace the antenna cable. |
Roof Antenna
1. | Disconnect the negative (-) battery terminal. |
2. | Remove the roof trim. (Refer to Body - "Roof Trim Assembly") |
3. | Disconnect the roof antenna connector (A). 
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4. | Remove the roof antenna after loosening a nut (A). 

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Roof Anenna
1. | Connect the roof antenna connectors. |
2. | Install the roof trim assembly. •
| Make sure that the cables and connectors are plugged in properly. |
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| Check the audio system. |
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Inspection1.Troubleshooting for Speaker(1)Basic inspection of speakerInspect the sound from speaker after verifying that the speaker mounting screws is removed and the wiring connector is connected precisely to remove vibration transmitted from body trims and surrounding parts...
Other information:
Replacement1.Remove the tailgate weatherstrip (A).
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Do not apply sealant to the body.2.To install, reverse the removal procedure.
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When installing the tailgate weatherstrip, check the center-marking line (B)...
InspectionCheck if the auto light control operates like a timing chart shown below. Tail lamp output and head lamp (Low) output is controlled based on the auto light sensor's input (illumination intensity) when the Auto Light Switch in Multi-Function Switch is turned ON, and the vehicle is in IGN1 or IGN2 ON Mode...
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