System Description

SYSTEM DIAGRAM

Courtesy of NISSAN NORTH AMERICA, INC.

Component	Function
Door switch	Door switch detects door open/close condition and then transmits door switch signal to BCM.
IPDM E/R	IPDM E/R operates horns with horn request signal received from BCM. IPDM E/R operates headlamps with high beam request signal received from BCM via CAN communication.
BCM	BCM controls VEHICLE SECURITY SYSTEM. BCM transmits horn request signal intermittently to IPDM E/R via CAN communication. BCM transmits high beam request signal intermittently to IPDM E/R via CAN communication.
Ignition switch	Ignition switch has push switch inside which detects that ignition switch is pressed, and then transmits the signal to Intelligent Key unit. Intelligent Key unit changes the ignition switch position with the operation of ignition switch. Intelligent Key unit maintains the ignition switch position status while ignition switch is not operated.
Intelligent Key	The Intelligent Key system is a system that makes it possible to lock and unlock the door locks (door lock/unlock function) by carrying the Intelligent Key, which operates based on the results of electronic ID verification using two-way communication between the Intelligent Key and the vehicle (Intelligent Key unit).
Outside key antenna	Outside key antenna detects whether Intelligent Key is within the detection area or not, and then transmits signal to Intelligent Key unit.
Door touch sensor	Door touch sensor transmits door lock/unlock request signal to Intelligent Key unit.
Hood switch	Refer to Hood Switch .
Horn	Theft warning alarm function activates horns intermittently when BCM detects that any door or hood is opened by unauthorized means, while the system is in the ARMED state. Panic alarm function activates horns intermittently when operating a cellular phone using the Telematics system function.
Intelligent Key unit	Intelligent Key unit performs the ID verification between Intelligent Key unit and Intelligent Key when the Intelligent Key is carried into the detection area of NATS antenna amp., and ignition switch is pressed. If the ID verification result is OK, ignition switch operation is available.
Headlamp	Panic alarm function activates headlamps intermittently when operating a cellular phone using the Telematics system function.
Hands free sensor control unit	Hands free sensor control unit judges user operation by detecting the hands free sensor.
Hands free sensor	Hands free sensor detects when the user performs kick motion toward rear bumper.

BCM INPUT/OUTPUT SIGNAL CHART

Input Signal Item

Transmit unit	Signal name
IPDM E/R	CAN communication	Hood switch signal
Remote keyless entry receiver	Key ID signal Each button operation signal
Ignition switch	Push switch signal
Each door switch	Door switch signal
Each door touch sensor	Door touch sensor signal
Hands free sensor control unit	Hands free sensor signal

Output Signal Item

Reception unit	Signal name
IPDM E/R	CAN communication	Horn request signal High beam request signal
Outside key antenna	Outside key antenna signal

SYSTEM DESCRIPTION

The vehicle security system has two alarm functions (theft warning alarm and panic alarm), and reduces the possibility of a theft or mischief by activating horns and headlamps intermittently.

The panic alarm does not start when the theft warning alarm is activating, and the panic alarm stops when the theft warning alarm is activated.The priority of the functions are as per the following.

Priority	Function
1	Theft warning alarm
2	Panic alarm

THEFT WARNING ALARM

The theft warning alarm function activates horns and headlamps intermittently when BCM detects that any door, hood or back door is opened by unauthorized means, while the system is in the ARMED state.

Operation Flow

Courtesy of NISSAN NORTH AMERICA, INC.

System state	Switching condition
DISARMED to PRE-ARMED	When all conditions of A and one condition of B is satisfied.	A	B
DISARMED to PRE-ARMED		Ignition switch: OFF All doors: Closed	All doors are locked by: LOCK button of Intelligent Key Door touch sensor
PRE-ARMED to ARMED	When none of the following conditions are satisfied for 30 seconds.	Ignition switch: ON UNLOCK button of Intelligent Key: ON Door touch sensor: ON Automatic back door open: Hands free sensor or automatic back door button of Intelligent Key
ARMED to ALARM	When one of the following condition is satisfied.	Any door: Closed to open Hood: Closed to open
PRE-ARMED to DISARMED	When one of the following condition is satisfied.	Ignition switch: ON UNLOCK button of Intelligent Key: ON Door touch sensor: ON Automatic back door open: Hands free sensor or automatic back door button of Intelligent Key
ARMED toDISARMED
ALARM toDISARMED
RE-ALARM	When one of the following condition is satisfied after the ALARM operation is finished.	Any door: Closed to open Hood: Closed to open

NOTE:

To lock/unlock all doors by operating remote controller button of Intelligent Key or door touch sensor, Intelligent Key must be within the detection area of outside key antenna. For details, refer to System Description .

DISARMED Phase

The vehicle security system is not set in the DISARMED phase. The vehicle security system stays in this phase while Any door other than back door is open, because it is assumed that the owner is inside or nearby the vehicle.When the vehicle security system is reset, each phase switches to the DISARMED phase directly.

PRE-ARMED Phase

The PRE-ARMED phase is the transient state between the DISARMED phase and the ARMED phase. This phase is maintained for 30 seconds, so that the owner can reset the setting due to a mis-operation. This phase switches to the ARMED phase when vehicle conditions are not changed for 30 seconds.To reset the PRE-ARMED phase, refer to the switching condition of No. 4 in the table above.

ARMED Phase

The vehicle security system is set, and BCM monitors all necessary inputs. If any door or hood is opened without using Intelligent Key, vehicle security system switches to the ALARM phase.To reset the ARMED phase, refer to the switching condition of No. 5 in the table above.

ALARM Phase

BCM transmits "horn request" signal and "High Beam Request" signal intermittently to IPDM E/R via CAN communication. In this phase, horns and headlamps are activated intermittently for approximately 27 seconds to warn that the vehicle is accessed by unauthorized means. After 27 seconds, the vehicle security system returns to the ARMED phase. At this time, if BCM still detects unauthorized access to the vehicle, the system is switched to the ALARM phase again. This RE-ALARM operation is carried out a maximum of 3 times.To cancel the ALARM operation, refer to the switching condition of No. 6 in the table above.

NOTE:

If a battery terminal is disconnected during the ALARM phase, theft warning alarm stops. But when the battery terminal is reconnected, theft warning alarm is activated again.

PANIC ALARM

The panic alarm function activates horns and headlamps intermittently when the owner presses the PANIC ALARM button of Intelligent Key outside the vehicle while the ignition switch is OFF.
When BCM receives panic alarm signal from Intelligent Key, BCM transmits "horn request" signal and "High Beam Request" signal intermittently to IPDM E/R via CAN communication. To prevent the activation due to mis-operation of Intelligent Key by owner, the panic alarm function is activated when BCM receives the signal for 0.4 - 0.6 seconds.
Panic alarm operation is maintained for approximately 27 seconds.
Panic alarm operation is canceled when BCM receives one of the following signals.
- LOCK button of Intelligent Key: ON
- UNLOCK button of Intelligent Key: ON
- PANIC ALARM button of Intelligent Key: Pressed
- Any door touch sensor: ON

TELEMATICS SYSTEM (HORN and LIGHT)

Telematics system (horn and light) activates horns or horns and headlamps intermittently by Smartphone while the ignition switch is OFF.
Telematics system (horn and light) is operated 3 times for a total duration of approximately 15 seconds.
Telematics system (horn and light) operation is canceled when ignition switch ON.