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SYSTEM SEC-15 < SYSTEM DESCRIPTION > [WITH INTELLIGENT KEY SYSTEM] C D E F G H I J L M A B SEC N O P NISSAN ANTI-THEFT SYSTEM : System Description INFOID:0000000009697554 SYSTEM DIAGRAM SYSTEM DESCRIPTION • The Nissan Anti-Theft System (NATS) prevents the engine from being started by Intelligent Key whose ID is not registered to the vehicle (BCM). It has higher protection against auto theft involving the duplication of mechanical keys. • The ignition key integrated in the Intelligent Key cannot start the engine. When the Intelligent Key battery is discharged, the NATS ID verification is performed between the transponder integrated with Intelligent Key and BCM via NATS antenna amp. when the Intelligent Key backside is contacted to push-button ignition switch while brake pedal is depressed. If the verification result is OK, the engine start operation can be per- formed by the push-button ignition switch operation. • Locate the security indicator lamp and always blinks it when the ignition switch is in any position except ON to warn that the vehicle is equipped with Nissan Anti-Theft System (NATS). • Up to 4 Intelligent Keys can be registered (including the standard ignition key) upon request from the owner. • When replacing ECM, BCM or Intelligent Key, the specified procedure (Initialization and registration) using CONSULT is required. • Possible symptom of NATS malfunction is “Engine can not start”. This symptom also occurs because of other than NATS malfunction, so start the trouble diagnosis according to • If ECM other than genuine part is installed, the engine cannot be started. For ECM replacement procedure, refer to EC-465, "Removal and Installation" . PRECAUTIONS FOR KEY REGISTRATION ALKIA2975GB |