Without smart key system
This indicator illuminates when the immobilizer key is inserted and turned to the ON position to start the engine.
At this time, you can start the engine. The indicator goes out after the engine is running.
If this indicator blinks when the ignition switch is in the ON position before starting the engine, have the system checked by an authorized HYUNDAI dealer.
With smart key system
If any of the following occurs in a vehicle equipped with the smart key, the immobilizer indicator illuminates, blinks or goes off.
Hyundai Tucson (LM) 2010-2015 Service Manual: Components and Components Location
Component Location
1. Rear glass defogger relay2. Rear glass defogger switch3. Rear glass defogger
...
Hyundai Tucson (LM) 2010-2015 Service Manual: Battery Description and Operation
Description
1.
The CMF(Closed Maintenance Free) battery is, as the name
implies, totally maintenance free and has no removable battery cell
caps.
2.
The CMF(Closed Maintenance Free) battery does not require water replenishment for the repair.
3.
The battery is completely sealed, exce ...