Input/Output Signal Chart

BCM

SYSTEM DESCRIPTION

NVIS (Nissan Vehicle Immobilizer System-NATS) has the following immobilizer functions:

• Engine immobilizer shows high anti-theft performance to prevent engine start 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.
• Therefore, NVIS/NATS warns outsiders that the vehicle is equipped with the anti-theft system. Refer to "SYSTEM DESCRIPTION ".
• If system detects malfunction, security indicator illuminate when ignition switch is turned to ON position.
• If the owner requires, ignition 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* is required.

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

  • ECM
  • BCM
  • Ignition key
  • EPS control unit
  • IPDM E/R
  • Combination meter
• NVIS/NATS trouble diagnosis, system initialization and additional registration of other Ignition key IDs must be carried out using CONSULT-III hardware and SECURITY CARD.

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

• Possible symptom of NVIS/NATS malfunction is "Engine cannot start". The engine can be started with the NVIS/NATS. 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 ".