| Troubleshooting |

Battery Repair procedures
Battery Sensor Description and OperationHyundai Elantra AD (2016-2020) Service Manual: Refrigerant Line Repair procedures
Replacement
1.
If the compressor is marginally operable, run the engine at
idle speed, and let the air conditioning work for a few minutes, then
shut the engine off.
2.
Disconnect the negative (-) battery terminal.
3.
Recover the refrigerant with a recovery / charging station.
...
Hyundai Elantra AD (2016-2020) Owners Manual: System Malfunction
Check Forward Collision Avoidance Assist system
When FCA is not working properly, the FCA warning light ()
will illuminate and the warning message will appear for a few seconds. After
the message disappears, the master warning light ()
will illuminate. In this case, have the vehicle i ...