Theft Warning Alarm

The theft warning alarm function activates horns and hazard warning lamps intermittently when BCM detects that any door or hood 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

Fig 1: Theft Warning Alarm Operation Flow Diagram

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

NOTE:

To lock/unlock all doors by operating remote controller button of keyfob, the keyfob must be within the detection area of BCM. For details, refer to "REMOTE KEYLESS ENTRY SYSTEM: 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 1.

ARMED Phase

The vehicle security system is set, and BCM monitors all necessary inputs. If any door or hood 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 switching condition of No. 11 in the table above 1.

ALARM Phase

BCM transmits "Theft Warning Horn Request" signal intermittently to IPDM E/R via CAN communication, and blinks hazard warning lamps. In this phase, horns and hazard warning lamps are activated intermittently for approximately 27.5 seconds to warn that the vehicle is accessed by unauthorized means. After 27.5 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. 12 in the table above 1.

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. If only the condition of hood is not satisfied, the system switches to the PRE-RESET phase. Then, when any condition is changed, the system switches to the DISARMED phase or PRE-ARMED phase.