Vehicle Immobilizer System

NVIS(NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS)

System Description
NVIS (Nissan Vehicle Immobilizer System-NATS) has the following immobilizer functions:
- Since only NVIS (NATS) registered keys (mechanical key and Intelligent Key), whose IDs have been registered into the ECM and BCM, allow the engine to run, operation of a stolen vehicle without a NVIS (NATS) registered key is prevented by NVIS (NATS).
NVIS (NATS) will immobilize the engine if someone tries to start it without the registered key of NVIS (NATS).

- All of the originally supplied ignition key IDs have been NVIS (NATS) registered.
If requested by the vehicle owner, a maximum of five key IDs can be registered into the NVIS (NATS) components.

- The security indicator blinks when the ignition switch is in OFF or ACC position. NVIS (NATS) warns outsiders that the vehicle is equipped with the anti-theft system.
- When NVIS (NATS) detects a malfunction, the security indicator lamp lights up while ignition key is in the ON position.
- NVIS (NATS) trouble diagnosis, system initialization and additional registration of other NVIS (NATS) ignition key IDs must be carried out using . hardware and CONSULT-III. NVIS (NATS) software. When NVIS (NATS) initialization has been completed, the ID of the inserted ignition key is automatically NVIS (NATS) registered. Then, if necessary, additional registration of other NVIS (NATS) ignition key IDs can be carried out.
Regarding the procedures of NVIS (NATS) initialization and NVIS (NATS) ignition key ID registration, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

- When servicing a malfunction of the NVIS (NATS) (indicated by lighting up of security indicator lamp) or registering another NVIS (NATS) ignition key ID, it may be necessary to re-register original key identification. Therefore, be sure to receive ALL KEYS from vehicle owner.




System Composition
The immobilizer function of the NVIS (NATS) consists of the following:
- Mechanical key (built into Intelligent Key)
- NATS antenna amp. located in the ignition key cylinder
- Body control module (BCM)
- Engine control module (ECM)
- Security indicator
- Steering lock solenoid
- Intelligent Key unit

NOTE: Communication between ECM, BCM and Intelligent Key unit uses the CAN communication system.