System Description

NATS (Nissan Anti-Theft System) has the following immobilizer functions:

• Engine immobilizer shows high anti-theft performance to prevent engine from starting by other than the owner.
• Only a key with key ID registered in BCM and ECM can start engine, and shows high anti-theft performance to prevent key from being copied or stolen.
• Security indicator always flashes with mechanical key removed condition (key switch: OFF) and ignition knob released condition on LOCK position (ignition knob switch: OFF).
• Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system. Refer to "SYSTEM DESCRIPTION ".
• If system detects malfunction, security indicator illuminates when ignition switch is turned to ON position.
• If the owner requires, ignition key ID or mechanical key ID can be registered for up to 4 keys.
• During trouble diagnosis or when the following parts have been replaced, and if mechanical key is added, registration* is required.

  ^*1 : All keys kept by the owner of the vehicle should be registered with mechanical key.

  • ECM
  • BCM
  • Mechanical key
  • Intelligent Key unit
  • Remote keyless entry receiver
  • Steering lock solenoid
• NATS trouble diagnosis, system initialization and additional registration of other mechanical key IDs must be carried out using CONSULT.

  When NATS initialization has been completed, the ID of the inserted mechanical key or mechanical key IDs can be carried out.

• Possible symptom of NATS malfunction is "Engine cannot start". Identify the possible causes according to "Work Flow", Refer to "WORK FLOW ".
• If ECM other than Genuine NISSAN is installed, the engine cannot be started. For ECM replacement procedure, refer to "ECM RE-COMMUNICATING FUNCTION: DESCRIPTION ".