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 anyone 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)
• Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system.
• 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 5 keys.
• During trouble diagnosis or when the following parts have been replaced, and if ignition key is added, registration^*1 is required.

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

  • ECM
  • BCM
  • Ignition key
  • Remote keyless entry receiver
• 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 REMOVAL AND INSTALLATION .