Nissan Maxima Service and Repair Manual: NISSAN vehicle immobilizer system-nats symptoms
Security indicator does not turn ON or flash.
Follow Trouble Diagnosis Flowchart referring to "SEC-4, "Work Flow"". Determine malfunctioning condition before performing this diagnosis.
Check that vehicle is under the condition shown in "Conditions of vehicle" before starting diagnosis.
Check systems shown in the "Action" column in this order.
CONDITIONS OF VEHICLE (OPERATING CONDITIONS)
Intelligent Key is not inserted into key slot.
Engine switch is not depressed.