Other information:
Troubleshooting
If ISG function is not operated, check the related DTC codes. (Refer to DTC
guide.)
If the ISG function is not operated in spite of no DTC, inspect the ISG system
as below.
The GDS tool shows the current data about the ISG function for inspection.
...
Whenever the engine start/stop button is changed to the ON position, the immobilizer
system checks and verifies if the key is valid or not.
If the key is valid, the engine will start.
If the key is invalid, the engine will not start.
To deactivate the immobilizer system
Change the engine start/stop ...