This vehicle has a passive theft-deterrent system.
The system does not have to be manually armed or disarmed.
The vehicle is automatically immobilized when the key is removed from the ignition.
The system is automatically disarmed when the vehicle is started with the correct key. The key uses a transponder that matches an immobilizer control unit in the vehicle and automatically disarms the system. Only an authorized key starts the vehicle. The vehicle may not start if the key is damaged.

The security light in the instrument cluster comes on if there is a problem with arming or disarming the theft-deterrent system.
When trying to start the vehicle, the security light comes on briefly when the ignition is turned on.
If the engine does not start and the security light stays on, there is a problem with the system. Turn the ignition off and try again.
If the engine still does not start, and the key appears to be undamaged or the light continues to stay on, try another ignition key. If the engine does not start with the other key, the vehicle needs service. If the vehicle does start, the first key may be damaged. See your dealer who can service the theft-deterrent system and have a new key made.
Do not leave the key or device that disarms or deactivates the theft-deterrent system in the vehicle.
How to Detect a Tamper Condition
Exterior MirrorsChecking Engine Oil
It is a good idea to check the engine oil level at each fuel fill. In order to
get an accurate reading, the oil must be warm and the vehicle must be on level ground.
The engine oil dipstick handle is a loop. See Engine Compartment Overview for the location of the engine oil dipstick.
1. I ...
Drive Range, Second Gear (Gen 1)
As vehicle speed increases and operating conditions become appropriate, the transmission
control module (TCM) processes input signals from the automatic transmission input
and output speed sensors, the throttle position sensor and other vehicle sensors
to determine the precise moment to comman ...
Drive belts
Water pump
Alternator
Drive belt automatic tensioner
Crankshaft pulley
Air conditioning compressor
WARNING
Always ensure the ignition switch is OFF before inspecting or servicing the
drive belts on your Nissan Armada. Unexpected engine rotation can cause serious
injury.
1. Ca ...