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: Passenger Airbag (PAB) Module Description and Operation
Description
The passenger airbag (PAB) is installed inside the crash pad
and protects the front passenger in the event of a frontal crash. The
SRSCM determines if and when to deploy the PAB.
Never attempt to measure the circuit resistance of the airbag
module (squib) ...
Hyundai Tucson (LM) 2010-2015 Service Manual: Intake Air Temperature Sensor (IATS) Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the IATS connector.
3.
Measure resistance between the IATS terminals 3 and 4.
4.
Check that the resistance is within the specification.
Specification: Refer to “Specification”
Removal
1.
Turn the ignition swit ...