Operation Description

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)


Operation Description


SYSTEM DIAGRAM






OPERATION WHEN INSERTING TO KEY SLOT
1. When inserting the Intelligent Key (with transponder) into the key slot, the key switch in the key slot turns
ON, and then it is detected that the Intelligent Key is inserted.
2. When pressing the push-button ignition switch at that time, BCM starts the IVIS (NATS) antenna amplifier integrated with the key slot and starts the IVIS (NATS) ID communication with the transponder integrated with the Intelligent Key.
3. BCM sends the IVIS (NATS) ID verification result to ECM via CAN communication and performs the ID verification.
4. If the IVIS (NATS) ID verification result is OK, BCM sends the key ID verification OK signal to Intelligent
Key unit via CAN communication line.
5. The Intelligent Key unit sends the steering unlock signal to the steering lock unit when receiving the signal. Then, it sends each power supply request signal to PDU (Power Distribution Unit) after unlocking the steering lock.
6. If the Intelligent Key unit judges that the engine start condition is satisfied, it sends the starter request signal via CAN communication to IPDM E/R and turns the starter motor relay ON.
7. The steering lock unit unlocks the latch when receiving the signal. PDU starts the power distribution according to the power supply position when receiving the signal.

NOTE:
If it is not in the engine start condition*, the starter motor relay is turned OFF. Therefore, the engine cannot be started and the power distributions of ACC, ON, and LOCK are performed only according to the push-button ignition switch operation.
*: For the engine start condition, refer to "PUSH-BUTTON IGNITION SWITCH OPERATION PROCEDURE".

OPERATION WHEN INTELLIGENT KEY IS CARRIED
By carrying the Intelligent Key, the engine start/stop operation can be performed only when pushing the push-button ignition switch.
For the details of the function, refer to Locations.

PUSH-BUTTON IGNITION SWITCH OPERATION PROCEDURE
The power supply position changing operation can be performed with the following operation.

NOTE:
- When an Intelligent Key is carried and when it is inserted to the key slot, the following operation is the same.
- When starting the engine, the Intelligent Key unit monitors the engine start conditions (brake pedal operation, A/T selector lever position, vehicle speed, and steering lock condition).
- Unless each start condition is fulfilled, the engine will not response regardless of how many times the push-button ignition switch is pushed. At that time, illumination repeats the position in the order of LOCK to ACC
to ON to LOCK.