System Description
- The IVIS (NATS) is an anti-theft system that registers an Intelligent Key ID to the vehicle (BCM) and prevents the engine from being started by an unregistered Intelligent Key. 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 IVIS (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. If the verification result is OK, the engine start operation can be performed by the push-button ignition switch operation.
- Security indicator lamp is located on combination meter, and always blinks when the power supply position is any position other than ON to warn that the vehicle is equipped with IVIS (NATS).
- Up to 4 Intelligent Keys can be registered (including the standard ignition key) upon request from the owner.
- When replacing ECM, BCM, steering lock unit (Models with steering lock unit) or Intelligent Key, the specified procedure (Initialization and registration) using CONSULT is necessary.
- Possible symptom of IVIS (NATS) malfunction is "Engine does not start". However, this symptom also occurs because of other than IVIS (NATS) malfunction, so start the trouble diagnosis according to "WORK FLOW ".
- If ECM other than genuine part is installed, the engine cannot be started. For ECM replacement procedure, refer to "WORK PROCEDURE " (VQ37VHR) or "WORK PROCEDURE " (VK56VD).