System Description

SYSTEM DIAGRAM

Courtesy of NISSAN NORTH AMERICA, INC.

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 is opened by unauthorized means, while the system is in the ARMED state.
Security indicator lamp on combination meter always blinks when ignition switch is in any position other than ON. Security indicator lamp blinking warns that the vehicle is equipped with a vehicle security system.

Operation Flow

Courtesy of NISSAN NORTH AMERICA, INC.

No.	System state	Switching condition
1	DISARMED to PRE-ARMED	When all conditions of A and one condition of B is satisfied.	A	B
1	DISARMED to PRE-ARMED		Ignition switch: OFF All doors: Closed	All doors are locked by: Door key cylinder LOCK switch LOCK button of Keyfob Door lock and unlock switch
2	PRE-ARMED to ARMED	When all of the following conditions are satisfied for 30 seconds.	Ignition switch: OFF All doors: Locked
3	ARMED to ALARM	When all conditions of A and B are satisfied.	A	B
3	ARMED to ALARM	When all conditions of A and B are satisfied.	Keyfob: Not used	Any door: Open
4	DISARMED to PRE-RESET	No conditions.
5	PRE-ARMED to PRE-RESET
6	ARMED to PRE-RESET
7	ALARM to PRE-RESET
8	PRE-RESET to DISARMED
9	PRE-RESET to PRE-ARMED
10	PRE-ARMED to DISARMED	When one of the following condition is satisfied.	Ignition switch: ACC/ON Door key cylinder UNLOCK switch: ON UNLOCK button of Keyfob: ON UNLOCK switch of door lock and unlock switch: ON Any door: Open
11	ARMED to DISARMED	When one of the following condition is satisfied.	Ignition switch: ACC/ON Door key cylinder UNLOCK switch: ON UNLOCK button of Keyfob: ON
12	ALARM to DISARMED	When one of the following condition is satisfied.
13	RE-ALARM	When the following condition is satisfied after the ALARM operation is finished.	Any door: Open

NOTE:

BCM ignores the door key cylinder UNLOCK switch signal input for 1 second after the door key cylinder LOCK switch signal input.
To lock/unlock all doors by operating remote controller button of Keyfob, the Keyfob must be within the detection area of remote keyless entry receiver. 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 is open, because it is assumed that the owner is inside or nearby the vehicle. Security indicator lamp blinks every 2.4 seconds.

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. Security indicator lamp illuminates while being in this phase.

To reset the PRE-ARMED phase, refer to the switching condition of No. 10 in the table above.

ARMED Phase

The vehicle security system is set, and BCM monitors all necessary inputs. If any door is opened without using Keyfob, vehicle security system switches to the ALARM phase. Security indicator lamp blinks every 2.4 seconds.

To reset the ARMED phase, refer to the switching condition of No. 11 in the table above.

ALARM Phase

BCM transmits "Theft Warning 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 50 seconds to warn that the vehicle is accessed by unauthorized means. ON/OFF timing of horns and headlamps are synchronized. After 50 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 2 times.

To cancel the ALARM operation, refer to the switching condition of No. 12 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.

PRE-RESET Phase

The PRE-RESET phase is the transient state between each phase and DISARMED phase.

PRE-ARMED phase is not available for this models.

PANIC ALARM

The panic alarm function activates horns and headlamps intermittently when the owner presses the PANIC ALARM button of Keyfob outside the vehicle while the ignition switch is OFF.
When BCM receives panic alarm signal from Keyfob, BCM transmits "Theft Warning 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 Keyfob 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 25 seconds.
Panic alarm operation is cancelled when BCM receives one of the following signals.
- LOCK button of Keyfob: ON
- UNLOCK button of Keyfob: ON
- PANIC ALARM button of Keyfob: Long pressed