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Home >> Nissan-Datsun >> 1995 >> Maxima V6-2968cc 3.0L DOHC MFI (VQ30DE) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Antitheft and Alarm Systems >> Description and Operation >> System Description

System Description

Power is supplied at all times
^ through 3O A fusible link (letter (d) ,located in the fuse and fusible link box)
^ to ignition switch terminal (1).
With the ignition switch in the START position, power is supplied
^ from terminal (5) of the ignition switch
^ to theft warning relay terminal (3) (M/T models for Canada).
With the ignition switch in the START position, power is supplied
^ through 7.5 A fuse (No. (33), located in the fuse block in the HEC)
^ to theft warning relay terminal (3) (M/T models for U.S.A.).
With the ignition switch in the ON or START position, power is supplied
^ through 10 A fuse (No. (17) located in the fuse block in the HEC)
^ to theft warning relay terminal (3) (A/T models).
Power is supplied at all times
^ through 7.5 A fuse (No. (40), located in the fuse block in the HEC)
^ to security indicator lamp terminal (2).
BCM terminal (38) is connected to terminal (1) of all door control units and to multi-remote control unit terminal (1).
BCM terminal (33) is connected to terminal (1) of all door control units and to multi-remote control unit terminal (1).
With the ignition switch in the ACC or ON position, power is supplied
^ through 7.5 A fuse (No. 19 located in the fuse block in the HEC)
^ to BCM terminal (28).
With the ignition switch in the ON or START position, power is supplied
^ through 7.5 A fuse (No. (12) located in the fuse block in the HEC)
^ to BCM terminal (29).
Power is supplied at all times
^ through 15 A fuse (No. 61, located in the fuse and fusible link box)
^ to theft warning lamp relay terminal (3)
Power is supplied at all times
^ through 15 A fuse (No. (62) ,located in the fuse and fusible link box)
^ to theft warning lamp relay terminal (6).
Power is supplied at all times
^ through 7.5 A fuse (No. (52), located in the fuse and fusible link box)
^ to theft warning horn relay-1 terminal (3) and (1)
^ to theft warning horn relay-2 terminal (1)
^ to theft warning lamp relay terminal (1).
Power is supplied at all times
^ through 10 A fuse (No. (53) located in the fuse and fusible link box)
^ to horn relay terminal (2).


THEFT WARNING SYSTEM ARMING (Without key or remote controller used to lock front doors)
When a door is open, BCM terminal (21) receives a ground signal from the door switch that is in the OPEN position.
When a door is unlocked, terminal (4) of the respective door control unit receives a ground signal
^ from terminal (2) of the respective door unlock sensor in door lock actuator
^ through body grounds (M13) and (M73) (for the front doors) or
^ through body grounds (B16) and (B19) (for the rear doors).
When the hood is open, BCM terminal (30) receives a ground signal
^ from terminal (1) of the hood switch
^ through body grounds (E5) and (E30).
When the trunk lid is open, BCM terminal (32) receives a ground signal
^ from terminal (1) of the trunk room lamp switch
^ through body grounds (B16) and (B19)
When none of the above conditions exists, the theft warning system is armed.

THEFT WARNING SYSTEM ARMING (With key or remote controller used to lock doors)
If the rear doors are locked and the key or remote controller is used to lock either front door, driver side and passenger door control unit terminal (6) receives a ground signal
^ from terminal (1) of the front door key cylinder switch LH or RH
^ from body grounds (M13) and (M73).
If this signal is received by the BCM, the theft warning system will be armed automatically. Once the theft warning system has been armed, BCM terminal (2) supplies ground to security indicator lamp terminal (1).

THEFT WARNING SYSTEM OPERATION
The theft warning system is triggered by
^ opening a door or the trunk lid without using the key or remote controller
^ opening the hood
^ tampering with (punching out etc.) the key cylinder in the door or trunk lid.
Once the theft warning system has been armed, and if the BCM receives a ground signal at terminal (32) terminal (21) or terminal (30) (as described under THEFT WARNING SYSTEM ARMING), the theft warning system will be triggered. Also, when one of the following signals is received at the BCM, the system will be triggered.
When a door key cylinder switch has been tampered with, driver side and passenger side door control unit terminal(3) receives a ground signal
^ from terminal (3) of the front door key cylinder switch LH or RH
^ to terminal (4) of the front door key cylinder switch LH or RH
^ from body grounds (M13) and (M73).
When the trunk lid key cylinder switch has been tampered with, BCM terminal (20) receives a ground signal
^ from terminal (2) of the trunk lid key cylinder switch
^ to terminal (3) of the trunk lid key cylinder switch
^ from body grounds (B16) and (B19).
If the theft warning system is triggered, ground is supplied
^ from terminal (14) of the BCM
^ to theft warning relay terminal (2).
With power and ground supplied, power to the clutch interlock relay (M/T models) or inhibitor switch (A/T models) is interrupted. So the starter motor will not operate. Refer to "STARTING SYSTEM". When the theft warning system is triggered, ground is supplied intermittently
^ from terminal (13) of the BCM
^ to theft warning horn relay-2 terminal (2) and
^ to theft warning lamp relay terminal (2).
When the theft warning lamp relay is energized, power is supplied
^ from theft warning lamp relay terminal (7)
^ to headlamp LH terminal (1) and
^ from theft warning lamp relay terminal (5)
^ to headlamp RH terminal (1).
Ground is supplied
^ to headlamp LH or RH terminal (3)
^ from body grounds (E5) and (E30).
When the theft warning horn relay-2 is energized. ground is supplied
^ to theft warning horn relay-1 terminal (2)
^ through theft warning horn relay-2 terminal (5)
^ through body grounds (E5) and (E30) and
^ to horn relay terminal (1)
^ through theft warning relay terminal (3)
When the theft warning horn relay-1 and horn relay are energized, power is supplied
^ to theft warning horn terminal (1) and
^ to horn terminal (1)
The headlamp flash and the horn sounds intermittently and the starting system is kept dead.

THEFT WARNING SYSTEM DISARMING
When the key or remote controller is used to unlock a door, driver or passenger door control unit terminal (5) receives a ground signal from terminal (2) of the front door key cylinder switch LH or RH When the key or remote controller is used to unlock the trunk lid, BCM terminal (18) receives a ground signal from terminal (1) of the trunk lid key cylinder switch.
When the BCM receives any one of these signals, the theft warning system is disarmed.

PANIC ALARM OPERATION
Multi-remote control system may operate the alarm (horn and headlamps) as required When the multi-remote control system receives a signal from remote controller, ground is supplied intermittently from BCM terminal (13) and BCM outputs alarm.
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