| Troubleshooting |

Battery Repair procedures
Battery Sensor Description and OperationHyundai Elantra AD (2016-2020) Service Manual: Speaker Repair procedures
Inspection
1.
Troubleshooting for Speaker
(1)
Basic inspection of speaker
Inspect 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.
...
Hyundai Elantra AD (2016-2020) Owners Manual: Bright-metal maintenance, Underbody maintenance
Bright-metal maintenance
To remove road tar and insects, use a tar remover, not a scraper or other
sharp object.
To protect the surfaces of brightmetal parts from corrosion, apply a coating
of wax or chrome preservative and rub to a high luster.
During winter weather or in coastal area ...