Hyundai Elantra Owners and Service Manuals

Hyundai Elantra: ISG (Idle Stop and Go) system / Battery Sensor Deactivation

[A] : Battery sensor

The battery sensor is deactivated, when the battery is disconnected from the negative pole for maintenance purpose.

In this case, the ISG system is limitedly operated due to the battery sensor deactivation. Thus, the driver needs to take the following procedures to reactivate the battery sensor after disconnecting the battery.

Prerequisites to reactivate the battery sensor

Switch "ON" and "OFF" the ignition one time. Park the vehicle for a minimum of 4 hours with the hood and all doors closed.

Pay extreme caution not to connect any accessories (i.e. navigation and black box) to the vehicle with the engine in the OFF status. If not, the battery sensor may not be reactivated.

Information

The ISG system may not operate in the following situations.

-- There is a malfunction with the ISG system.
-- The battery is weak.
-- The brake vacuum pressure is low. If this occurs, have the ISG system checked by an authorized HYUNDAI dealer.

NOTICE

  • Use only a genuine HYUNDAI Absorbent Glass Mat (AGM) battery for replacement. If not, the ISG system may not operate normally.
  • Do not recharge the Absorbent Glass Mat (AGM) battery with a general battery charger. It may damage or explode the Absorbent Glass Mat (AGM) battery.
  • Do not remove the battery cap. The battery electrolyte, which is harmful to the human body, may leak out.

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