Nissan Altima 2007-2012 Service Manual: Vehicle security system
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
OPERATION FLOW
SETTING THE VEHICLE SECURITY SYSTEM
Initial Condition
• Ignition switch is in OFF position.
Disarmed Phase
• When doors or trunk is open, the vehicle security system is set in the disarmed phase on the assumption that the owner is inside or near the vehicle.
• When the vehicle security system is in the disarmed phase, the security indicator lamp blinks every 2.4 seconds.
Pre-armed Phase and Armed Phase
When the following operation 1 or 2 is performed, the vehicle security system turns into the “pre-armed” phase. (The security indicator lamp illuminates.) 1. BCM receives LOCK signal from front door key cylinder switch or Intelligent Key, after trunk and all doors are closed.
2. Trunk and all doors are closed after front doors are locked by key or door lock and unlock switch.
The security indicator lamp illuminates for 30 seconds. Then, the system automatically shifts into the “armed” phase.
CANCELING THE SET VEHICLE SECURITY SYSTEM
When one of the following operations is performed, the armed phase is canceled.
1. Unlock the doors with the key or Intelligent Key.
2. Turn ignition switch “ON” or “ACC” position.
CANCELING THE ALARM OPERATION OF THE VEHICLE SECURITY SYSTEM
When unlocking the door with the key or Intelligent Key the alarm operation is canceled.
ACTIVATING THE ALARM OPERATION OF THE VEHICLE SECURITY SYSTEM
Check that the system is in the armed phase. (The security indicator lamp blinks every 2.4 seconds.) When the following operation 1 or 2 is performed, the system sounds the horns and flashes the headlamps for about 50 seconds.
1. Trunk or any door is opened during armed phase.
2. Disconnecting and connecting the battery connector before canceling armed phase.
PANIC ALARM OPERATION
Intelligent Key system will not operate horn and headlamps if the ignition switch is in the ACC or ON position.
When the Intelligent Key system is triggered, ground is supplied intermittently to both headlamp relay and horn relay.
When headlamp relay and horn relay are energized, then power is supplied to headlamps (LH and RH) and horns (HIGH and LOW).
The headlamp flashes and the horn sounds intermittently.
The alarm automatically turns off after 50 seconds or when BCM receives any signal from Intelligent Key.
Component Parts Location
1. Body control module M16, M17, M18, M19, M21 (view with instrument panel removed)
2. IPDM E/R E17, E18
3. Horn relay H-1
4. Key slot M40
5. Remote keyless entry receiver M27 (view with instrument panel removed)
6. Main power window and door lock/ unlock switch D7, D8
7. Power window and door lock/unlock switch RH D105
8. Front door lock assembly LH (key cylinder switch) D10
9. Front door switch LH B8 RH B108
10. Rear door switch LH B18 RH B116
11. Trunk lamp switch and trunk release solenoid B28
12. Horn (low) E215 (view with front fender protector LH removed)
13. Horn (high) E216
14. Combination meter M24
15. Security indicator lamp
Component Description
NVIS (Nissan vehicle immobilizer system-nats)
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
• The NVIS (NATS) is an anti-theft system by registering an Intelligent Key
ID in to the vehicle and preven ...
Diagnosis system (BCM)
COMMON ITEM
Diagnosis Description
CONSULT-III performs the following functions via CAN communication with
BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NO ...
Other materials:
Brake pad wear indicators
The disc brake pads on your vehicle have audible
wear indicators. When a brake pad requires replacement,
a high pitched scraping or screeching
sound will be heard when the vehicle is in
motion. The noise will be heard whether or not the
brake pedal is depressed. Have the brakes
checked as soon ...
Diagnosis and repair workflow
Work Flow
OVERALL SEQUENCE
DETAILED FLOW
1.GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the
condition and the environment when
the incident/malfunction occurred).
>> GO TO 2
2.CHECK DTC WITH BCM AND IPDM E/R
1. Check “Self Diagn ...
B2553 ignition relay
Description
BCM turns ON the following relays to ignition power supply to each ECU when
the ignition switch is turned
ON.
• Ignition relay-1 (inside IPDM E/R)
• Ignition relay-2 (inside fuse block)
• Blower fan motor relay
BCM checks any ignition relay ON request for consistency wit ...