Component parts
Nissan vehicle immobilizer system-nats
Nissan vehicle immobilizer systemnats : component parts location
(Inside steering column)
Nissan vehicle immobilizer systemnats : component description
Item | Function |
Bcm | Verifies the received signal from the ignition key id, then informs ecm whether to allow engine start. |
Transmission range switch (cvt models) | Detects whether the shift lever is in park. |
Clutch interlock switch (m/t models) | Detects whether the clutch pedal is depressed. |
Dongle unit (canada only) | Sends id verification signal to the bcm. |
Starter relay | Supplies battery voltage to the starter motor when enabled. |
Nats antenna amp. | Detects the ignition key presence in the ignition key cylinder. |
Security indicator | Indicates the status of the security system. |
Ipdm e/r | Supplies battery voltage from integrated starter relay to the starter motor. |
Vehicle security system
Vehicle security system : component parts location
Vehicle security system : component description
Item | Function |
Bcm | Controls the door lock function. |
Door lock and unlock switch | Input lock or unlock signal to bcm. |
Door switch | Input door open/close condition to bcm. |
Key switch | Input key switch condition to BCM. |
Remote keyless entry receiver | Receives lock/unlock signal from the keyfob, and then transmits to bcm. |
Key switch | Input key switch on/off condition to bcm. |
Horn | Provides audible warning in panic mode. |
System
Nissan vehicle immobilizer system-nats
Nissan vehicle immobilizer systemnats : system diagram
Nissan vehicle immobilizer systemnats : system description
Input/output signal chart
Bcm
System description
NATS (Nissan Anti-Theft System) has the following immobilizer functions:
*1: All keys kept by the owner of the vehicle should be registered with mechanical key.
PRECAUTIONS FOR KEY REGISTRATION
Therefore the registered key is necessary for this procedure. Before starting the registration procedure, collect all registered Keys from the customer.
The key ID registration is the procedure that registers the ID to the BCM.
SECURITY INDICATOR
MAINTENANCE INFORMATION
CAUTION:
It is necessary to perform NATS ID registration when replacing any of the following parts.
If ID registration is mot performed the electrical system may not operate properly.
Vehicle security system
Vehicle security system : system diagram
Vehicle security system : system description
The priority of the functions are as per the following.
Theft warning alarm
Operation flow
Note:
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
P0444, P0445 EVAP Canister purge volume control solenoid valve
DTC Logic
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0444
PURG VOLUME CONT/V
(Evaporative emission system
purge control valve circuit open)
An excessively low voltage signal is sent to ...
P0711 Transmission fluid temperature sensor A
DTC Logic
DTC DETECTION LOGIC
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
P0711
FLUID TEMP SENSOR A
(Transmission Fluid Temperature
Sensor A Circuit Range/
Performance)
When any of 1 or 2 is satisfied:
...
Folding rear seat
Pull the knob A to fold each seatback down.
WARNING
Never allow anyone to ride in the cargo
area or on the rear seat when it is in the
fold-down position. Use of these areas
by passengers without proper restraints
could result in serious injury in an accident
or s ...