ISG (Idle stop & go) system equipped vehicle always use the AGM battery only. If flooded battery has installed, this can potentially lead to engine electrical trouble or ISG system error.
Disconnect the battery terminals, negative first.
Remove the battery bracket.
Replace same capacity of the AGM battery.
AGM battery-60Ah
Install the battery bracket and connect the terminals.
Ensure the AGM battery is placed correctly on the battery tray.
In all cases, an AGM battery must be installed and the battery sensor calibrated for the ISG system to function.
After the battery has been changed or disconnected, the battery sensor must be recalibrated.
After connecting the battery, start the engine at least once.
Then park the car for at least 4 hours with the ignition off in the ignition switch OFF door closed, hood switch off state.
After the 4 hours, the engine should be started two times. At this time the battery sensor will be recalibrated. (Refer to "Battery sensor recalibration procedure" in FL group)
But first 25 times, the ISG function can operates regardless of ISG system stability for ISG function operating check.
Do not open the AGM battery.
The AGM battery must not be opened under any circumstances as the introduction of oxygen from the air will cause the battery to lose its chemical equilibrium and rendered non-operational.