Theft Warning Alarm

WARNING: This page is about a different car, the 2011 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

The theft warning alarm function activates horns and headlamps intermittently when BCM detects that any door or trunk lid is opened by unauthorized means, while the system is in the ARMED state.
Security indicator lamp always blinks when ignition switch is 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 MOTOR CO., U.S.A.

SWITCHING CONDITION REFERENCE CHART

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/LOCK All doors: Closed Trunk lid: Closed	All doors are locked by: Door key cylinder LOCK switch LOCK button of Intelligent Key Door request switch Door lock and unlock switch
2	PRE-ARMED to ARMED	When all of the following conditions are satisfied for 30 seconds.	Ignition switch: OFF/LOCK All doors: Closed Trunk lid: Closed
3	ARMED to ALARM	When the condition A and one condition of B are satisfied.	A	B
3	ARMED to ALARM	When the condition A and one condition of B are satisfied.	Intelligent Key function: Not used	Any door: Open Trunk lid: 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/LOCK All doors: Closed Trunk lid: Open	All doors are locked by: Door key cylinder LOCK switch LOCK button of Intelligent Key Door request switch
5	PRE-ARMED to PRE-RESET	When the following condition is satisfied.	Trunk lid: Open
6	ARMED to PRE-RESET	When one of the following conditions is satisfied.	Trunk key cylinder switch: ON Trunk lid opener request switch: ON TRUNK OPEN button of Intelligent Key: ON
7	ALARM to PRE-RESET	When one of the following conditions is satisfied.
8	PRE-RESET to DISARMED	When one of the following conditions is satisfied.	Ignition switch: ACC/ON/CRANKING/RUN Door key cylinder UNLOCK switch: ON UNLOCK button of Intelligent Key: ON Door request switch: ON UNLOCK switch of door lock and unlock switch: ON Any door: Open Soft top open permission signal from soft top control unit: ON
9	PRE-RESET to PRE-ARMED	When all conditions of A and condition B are satisfied.	A	B
9	PRE-RESET to PRE-ARMED	When all conditions of A and condition B are satisfied.	Ignition switch: OFF/LOCK All doors: Closed	Trunk lid: Closed
10	PRE-ARMED to DISARMED	When one of the following conditions is satisfied.	Ignition switch: ACC/ON/CRANKING/RUN Door key cylinder UNLOCK switch: ON UNLOCK button of Intelligent Key: ON Door request switch: ON Any door: Open Soft top open permission signal from soft top control unit: ON
11	ARMED to DISARMED	When one of the following condition is satisfied.	Ignition switch: ACC/ON/CRANKING/RUN Door key cylinder UNLOCK switch: ON UNLOCK button of Intelligent Key: ON Door request switch: ON
12	ALARM to DISARMED	When one of the following condition is satisfied.
13	RE-ALARM	When one of the following conditions is satisfied after ALARM operation is finished.	Any door: Open Trunk lid: 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 or trunk lid by operating remote controller button of Intelligent Key or door/trunk lid request switch, Intelligent Key must be within the detection area of the outside key antenna. For details, refer to , "DOOR LOCK FUNCTION : 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 or trunk lid is opened without using Intelligent Key or mechanical key, vehicle security system switches to the ALARM phase. Security indicator lamp blinks every 2.4 seconds.

If the theft warning alarm is activated irregularly when the customer opened trunk lid using mechanical key, trunk key cylinder switch circuit might have a malfunction. Verify the switch circuit. Refer to "COMPONENT FUNCTION CHECK ".

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 timings 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. If only the condition of trunk lid 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.

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 position is OFF or LOCK.
When BCM receives panic alarm signal from Intelligent Key, 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 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 25 seconds.
Panic alarm operation is cancelled when BCM receives one of the following signals.
- LOCK button of Intelligent Key: ON
- UNLOCK button of Intelligent Key: ON
- TRUNK OPEN button of Intelligent Key: ON
- PANIC ALARM button of Intelligent Key: Long pressed
- Any door request switch: ON