Intelligent Key System

INTELLIGENT KEY SYSTEM

System Description
- The Intelligent Key system is a system that makes it possible to lock and unlock the door locks (door lock/unlock function), open the trunk (trunk open function), and start the engine (engine start function) by carrying around the Intelligent Key (without some key operation), which operates based on the results of electronic ID verification using two-way communications between the Intelligent Key and the vehicle (Intelligent Key unit).

CAUTION: The driver should always carry the Intelligent Key

- Operation of the remote controller buttons on the Intelligent Key also provides the same functions as the remote controller entry system. (Remote keyless entry functions)
- If an action that does not meet the operating conditions of the Intelligent Key system is taken, the buzzer goes off to inform the driver. (Warning chime functions)
- When a door lock is locked or unlocked with request switch or remote controller button operation, the hazard lamps flash and the buzzer (outside vehicle) sounds (Hazard and horn reminder function).
- Even if the Intelligent Key battery is completely discharged, the door locks can be locked and unlocked and the engine started with the mechanical key built into the Intelligent Key.
- The settings for each function can be changed with the CONSULT-II.
- If an Intelligent Key is lost, a new Intelligent Key can be registered. A maximum of 4 Intelligent Keys can be registered.
- It has been made possible to diagnose the system and register an Intelligent Key with the CONSULT-II.

DOOR LOCK/UNLOCK/TRUNK OPEN FUNCTION
Only when pressing the request switch, it is possible to lock and unlock the door and open the trunk by carrying around the Intelligent Key (without some key operation).

System Diagram

Operation Description
- When the Intelligent Key unit detects that each request switch is pressed, it starts the outside antenna corresponding to the pressed request switch and sends the request signal to the Intelligent Key. And then, make sure that the Intelligent Key is near the door or the trunk.
- If the Intelligent Key is within the outside antenna detection area, it receives the request signal and sends the key ID signal to the Intelligent Key unit.
- Intelligent Key receives the key ID signal and compares it with the registered key ID.
- If the key ID check result is OK, the Intelligent Key unit sends the door lock/unlock or trunk open request signal to BCM (Body control module) via CAN communication line.
- Intelligent Key unit sends the door lock/unlock signal and sounds Intelligent Key buzzer (Engine room) warning (lock: 1 time, unlock: 2 times trunk open: 4 times) at the same time.
- When BCM receives the door lock/unlock signal, it operates door lock actuator and flashes the hazard lamp (lock: 1 time, unlock: 2 times) at the same time as an operation check.
- When BCM receives the trunk open request signal, it operates the trunk lid opener actuator and opens the trunk.

Operation Condition
If the following conditions are not satisfied, door lock/unlock or trunk open operations will not response even if the request switch is operated.

Outside Key Antenna Detection Area
The outside key antenna detection area of door lock/unlock function is in the range of approximately 80 cm (31.50 in) surrounding the driver and passenger door handles. The outside key antenna detection area of trunk open function is in the range of approximately 80 cm (31.50 in) surrounding Trunk opener request switch. However, this operating range depends on the ambient conditions.

Key Reminder Function

CAUTION:
- The above function operates when the Intelligent Key is inside the vehicle. However, there may be times when the Intelligent Key cannot be detected, and this function will not operate when the Intelligent Key is on the instrument panel, rear parcel shelf, or in the glove box. Also, this system sometimes does not operate if the Intelligent Key is in the door pocket for the open door.
- When the key reminder function is operated when the trunk is open/closed and the buzzers sound, if the following operations are performed, the key reminder function is cleared and buzzer sounds are stopped.
- Remote controller door lock button operation of Intelligent Key
- Remote controller door unlock button operation of Intelligent Key
- When the trunk is closed, the Intelligent Key is not inside the vehicle
- When any door is open

Selective Unlock Function for Driver Side
When an LOCK signal is sent from door request switch (driver side), all doors will be locked.

When an UNLOCK signal is sent from door request switch (driver side) once, driver's door will be unlocked.

Then, if an UNLOCK signal is sent from door request switch (driver side) again within 5 seconds, passenger side door will be unlocked.

Hazard and Horn Reminder
When doors are locked or unlocked by door request switch, Intelligent Key unit sends hazard and horn request signal to BCM via CAN communication line.

BCM flashes hazard warning lamps as a reminder and sends horn chirp signal to IPDM E/R. IPDM E/R sounds horn as a reminder.

The hazard and horn reminder has a horn chirp mode (C mode) and a non-horn chirp mode (S mode).

Operating function of hazard and horn reminder
Hazard and horn reminder does not operate if any door switch is ON (any door is OPEN).

How to change hazard and horn reminder mode

With CONSULT-II
Hazard and horn reminder can be changed using "HAZARD ANSWER BACK", "ANSWER BACK WITH I-KEY LOCK" and "ANSWER BACK WITH I-KEY UNLOCK" mode in "WORK SUPPORT". Refer to "WORK SUPPORT".

List of Operation Related Parts

REMOTE KEYLESS ENTRY FUNCTIONS

Door Lock/Unlock Function
The Intelligent Key has the same functions as the remote control entry system. Therefore, it can be used in the same manner as the remote controller by operating the door lock/unlock button and trunk open button.

System Diagram

Door Lock/Unlock Function
- When door lock/unlock button of the Intelligent Key is passed, lock signal or unlock signal is sent from Intelligent Key to Intelligent Key unit.
- Intelligent Key unit sends the door lock/unlock request signal to BCM via CAN communication line.
- When BCM receives the door lock/unlock signal, it operates door lock actuator and flashes the hazard lamp (lock: 1 time, unlock: 2 times) at the same time as an operation check.

Trunk Open Function
- When pressing the trunk button of the Intelligent Key, the trunk open signal is sent from the Intelligent Key to the Intelligent Key unit.
- Intelligent Key unit sends trunk open request signal to BCM via CAN communication line and sounds Intelligent Key warning buzzer (Engine room) 4 times at the same time.
- When BCM receives the trunk open request signal, it operates the trunk lid opener actuator and opens the trunk.

Operation Condition

Selective Unlock Function
When an LOCK signal is sent from remote controller of Intelligent Key, all doors will be locked.

When an UNLOCK signal is sent from remote controller of Intelligent Key once, driver's door will be unlocked.

Then, if an UNLOCK signal is sent from remote controller of Intelligent Key again within 5 seconds, all other door will be unlocked.

Hazard and Horn Reminder
When doors are locked or unlocked by remote controller of Intelligent Key, Intelligent Key unit sends hazard and horn request signal to BCM via CAN communication line.

BCM flashes hazard warning lamps as a reminder and sends horn chirp signal to IPDM E/R. IPDM E/R sounds horn as a reminder.

The hazard and horn reminder has a horn chirp mode (C mode) and a non-horn chirp mode (S mode).

Operating function of hazard and horn reminder

Hazard and horn reminder does not operate if any door switch is ON (any door is OPEN).

How to change hazard and horn reminder mode

With CONSULT-II
Hazard and horn reminder can be changed using "HORN WITH KEYLESS LOCK" and "HAZARD ANSWER BACK" mode in "WORK SUPPORT".Refer to "WORK SUPPORT".

Without CONSULT-II
When LOCK and UNLOCK signals are sent from the remote controller of Intelligent Key for more than 2 seconds at the same time, the hazard and horn reminder mode is changed and hazard warning lamp flashes and horn sounds as given:

Auto Door Lock Function
When all doors are locked, ignition knob switch is OFF (when ignition switch is not pressed) and key switch is OFF (when mechanical key is not inserted in key cylinder), doors are unlocked with remote controller of Intelligent Key. When Intelligent Key unit does not receive the following signals within 30 seconds, all doors are locked.
- Door switch is ON (door is opened)
- Door is locked
- Ignition knob switch is ON (ignition switch is pressed)
- Key switch is ON (mechanical key is inserted in key cylinder)

Auto door lock mode can be changed by "AUTO RELOCK TIMER" mode in "WORK SUPPORT". Refer to "WORK SUPPORT".

Panic Alarm Function
When ignition knob switch is OFF (when ignition switch is not pressed) and key switch is OFF (when mechanical key is not inserted in key cylinder), Intelligent Key unit receives PANIC ALARM signal from remote controller of Intelligent Key.

Intelligent Key unit sends alarm request signal to BCM via CAN communication line.

BCM turns on and off headlamp intermittently and sends theft warning horn signal to IPDM E/R. Then, IPDM E/R turns on and off horn intermittently. The headlamp flashes and the horn sounds intermittently.

The alarm automatically turns off:
- After 25 seconds
- When Intelligent Key unit receives any signal from remote controller of Intelligent Key
- When door request switch is pressed (Intelligent Key is outside vehicle)

Panic alarm function mode can be changed by "PANIC ALARM DELAY" mode in "WORK SUPPORT". Refer to "WORK SUPPORT".

Keyless Power Window Down (Open) Function
All power windows open when the unlock button on remote controller of Intelligent Key is activated and kept pressed for more than 3 seconds with the ignition switch OFF. The windows keep opening if the unlock button is continuously pressed.
The power window opening stops when the following operations are performed:
- When the unlock button is kept pressed more than 15 seconds.
- When the ignition switch is turned ON while the power window opening is operated.
- When the unlock button is released.

While retained power operation activate, Keyless power window down (open) Function cannot be operated. Keyless power window down operation mode can be changed by "P/W DOWN DELAY" mode in "WORK SUPPORT". Refer to "WORK SUPPORT".

Room Lamp Illumination Operation
When the following conditions are met:
- Condition of interior lamp switch is in DOOR position
- Door switch OFF (when all the doors are closed)

Intelligent Key system turns on interior lamp (for 30 seconds) by receiving UNLOCK signal from remote controller of Intelligent Key. For detailed description, refer to "ROOM LAMP TIMER OPERATION".

List of Operation Related Parts

ENGINE START FUNCTION
When ignition knob switch is ON (press ignition switch), Intelligent Key unit searches Intelligent Key in the vehicle using inside key antenna.

When Intelligent Key is inside the vehicle, it performs the following operation.
- Illuminate green "KEY" warning lamp in combination meter.
- Released steering lock and ignition switch can be turned from OFF to ACC, ON or START position.

NOTE: If Intelligent Key is not registered, "KEY" warning lamp in combination meter illuminates red.

- Intelligent Key sends engine start signal via CAN communication line.

When ignition switch turns to START position, BCM sends starter request signal to IPDM E/R. Then, engine starts.

Even if Intelligent Key battery runs down, Intelligent key unit can start engine with mechanical key built Intelligent Key. For details, refer to "IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)".

All of the originally supplied Intelligent Key IDs (except for key) have been registered in Intelligent Key system.

If requested by the vehicle owner, a maximum of four Intelligent Key IDs can be registered into the Intelligent Key system components.

List of Operation Related Parts

WARNING CHIME FUNCTION

Operation Description
The warning chimes are as follows and are given to the user as warning information and warnings using combinations of Intelligent Key warning buzzer (in instrument panel and engine room), and warning lamps "KEY" and "P-SHIFT".
- Ignition switch warning chime
- Ignition key warning chime
- OFF position warning chime
- OFF position warning chime (after door closed)
- Take away warning chime
- Take away warning chime (from window)
- Door lock operation warning chime
- Intelligent key low battery warning
- P position warning

Operation Condition

List of Operation Related Parts

CHANGE SETTINGS FUNCTION
The settings for each function can be changed with the CONSULT-II.

Changing Settings Using CONSULT-II
The settings for the Intelligent Key system functions can be changed using CONSULT-II (WORK SUPPORT). Refer to "WORK SUPPORT".

NOTE: Once a function setting is changed, it will remain effective even if the battery is disconnected.

INTELLIGENT KEY REGISTRATION
Intelligent Key-ID registration is performed using the CONSULT-II.

CAUTION:
- After a new Intelligent Key-ID is registered, be sure to check the function.
- When registering an additional Intelligent Key-ID, take any Intelligent Keys already registered and Intelligent Keys for any other vehicles out of the vehicle before starting.

CONSULT-II can be used to check and delete Intelligent Key-IDs. For future information, see the CONSULT-II Operation Manual NATS.

STEERING LOCK UNIT REGISTRATION

Steering Lock Unit ID Registration

CAUTION:
- The method for registering a steering lock unit ID depends on the status of the steering lock unit and Intelligent Key unit (new or old unit).
- After registration is completed, press ignition switch with an Intelligent Key in the vehicle so that it can be turned, and confirm that it cannot be turned even when ignition switch is pressed without an Intelligent Key in the vehicle.

For future information, see the CONSULT-II Operation Manual NATS-IVIS/NVIS.

CAN Communication System Description
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Unit
Refer to LAN-26, "Information Bus". CAN Communication