Hyundai Elantra: On-vehicle Inpection - Alternator. Repair procedures - ISG (Idle Stop & Go) System - Fuel System - Hyundai Elantra MD 2010-2015 Service manualHyundai Elantra: On-vehicle Inpection

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Check that the battery cables are connected to the correct terminals.
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Disconnect the battery cables when the battery is given a quick charge.
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Never disconnect the battery while the engine is running.
Check The Battery Terminals And Fuses
1.
Check that the battery terminals are not loose or corroded.
2.
Check the fuses for continuity.
Inspect Drive Belt
1.
Visually check the belt for excessive wear, frayed cords etc.
If any defect has been found, replace the drive belt.
Cracks on the rib side of a belt are considered acceptable. If the belt has chunks missing from the ribs, it should be replaced.