Nissan Sentra. Manual - part 779
SEC-144
< SYSTEM DESCRIPTION >
[WITHOUT INTELLIGENT KEY SYSTEM]
SYSTEM
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 key-
less entry receiver. For details, refer to
SEC-141, "NISSAN VEHICLE IMMOBILIZER SYSTEM-NATS : 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 sec-
onds.
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 approxi-
mately 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 activa-
tion 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
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
13
RE-ALARM
When the following condition
is satisfied after the ALARM
operation is finished.
• Any door: Open
No.
System state
Switching condition