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. IPDM E/R receives hood switch signal from hood switch signal.
BCM		BCM controls VEHICLE SECURITY SYSTEM. BCM transmits horn request signal intermittently to IPDM E/R via CAN communication.
Power switch	Push switch	Power switch has push switch inside which detects that power switch is pressed, and then transmits the push switch signal to Intelligent Key unit. Intelligent Key unit changes the power switch position with the operation of power switch. Intelligent Key unit maintains the power switch position status while power switch is not operated.
Intelligent Key		Intelligent Key transmits the key ID to 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.
One touch sensor		One touch sensor detects when operation of the one touch sensor.
Back door opener switch assembly	Door request switch	Door request switch 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. Telematics system (horn and light) 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 inside key antenna, and power switch is pressed. If the ID verification result is OK, power switch operation is available.
TCU		TCU transmits horn and light request signal to BCM when horn and light request is received from NissanConnect Services.
Hazard warning lamp		Telematics system (horn and light) activates Hazard warning lamps intermittently when operating a cellular phone using the Telematics system function.
Headlamp		Theft warning alarm function activates headlamps 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 headlamps intermittently when operating a Intelligent Key using 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
TCU	CAN communication	Horn and light request signal Panic alarm request signal
Each door switch	Door switch 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

INTELLIGENT KEY UNIT INPUT/OUTPUT SIGNAL CHART

Input Signal Item

Transmit unit	Signal name
Intelligent Key	Key ID signal Each button operation signal
Power switch	Push switch signal
Each one touch sensor	One touch sensor signal
Door request switch	Door request switch signal

Output Signal Item

Reception unit	Signal name
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		Power switch: OFF All doors: Closed	All doors are locked by: LOCK button of Intelligent Key Walk away lock function One touch sensor Door request switch
PRE-ARMED to ARMED	When none of the following conditions are satisfied for 30 seconds.	Power switch: ON UNLOCK button of Intelligent Key: ON One touch sensor: Unlock Door request switch: Unlock Approach unlock: 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.	Power switch: ON UNLOCK button of Intelligent Key: ON One touch sensor: Unlock Door request switch: Unlock Approach unlock: ON Automatic back door open: Hands free sensor or automatic back door button of Intelligent Key
ARMED to DISARMED
ALARM to DISARMED
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, approach unlock/walk away lock function, one touch sensor or door request switch, Intelligent Key must be within the detection area of outside key antenna. For details: Refer to System Description .
To open automatic back door by hands free 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 customer 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 customer 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 customer 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 customer, 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 request switch: ON
- One touch sensor: ON
- Approach unlock: ON

TELEMATICS SYSTEM (HORN and LIGHT)

Telematics system (horn and light) activates horns or horns and hazard warning lamp intermittently by cellular phone while the power 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 power switch ON.