Nissan Sentra Service Manual: System description
Component parts
Component parts location

- Ipdm e/r (contains ignition relay-1)
- Bcm (view with instrument panel removed)
- Fuse block (j/b) (front)
- Fuse block (j/b) (back)
- Blower relay
- Ignition relay-2
- Accessory relay-1
- Push-button ignition switch
Component description


System
Power distribution system
Power distribution system : system diagram

Power distribution system : system description
System description
- PDS (POWER DISTRIBUTION SYSTEM) is the system that BCM controls with the
operation of the pushbutton
ignition switch and performs the power distribution to each power circuit.
This system is used instead
of the mechanical power supply changing mechanism with the operation of the
conventional key cylinder.
- The push-button ignition switch can be operated when intelligent key is
in the following condition.
- Intelligent key is in the detection area of the inside key antenna.
- Intelligent key backside is contacted to push-button ignition switch.
- The push-button ignition switch operation is input to bcm as a signal.
Bcm changes the power supply position
according to the status and operates the following relays to supply power to
each power circuit.
- Ignition relay-1
- Ignition relay-2
- Accessory relay-1
- Accessory relay-2
- Blower relay
Note:
The engine switch operation changes due to the conditions of brake pedal,
selector lever and vehicle speed.
- The power supply position can be confirmed with the lighting of the
indicators in the push-button ignition
switch.
Battery saver system
When all the following conditions are met for 30 minutes, the battery saver
system will cut off the power supply
to prevent battery discharge.
- The ignition switch is in the ACC or ON position
- All doors are closed
- Selector lever is in the p (park) position
Reset condition of battery saver system
In order to prevent the battery from discharging, the battery saver system
will cut off the power supply when all
doors are closed, the selector lever is in p (park) position and the ignition
switch is left in the acc or on position
for 30 minutes. If any of the following conditions are met the battery saver
system is released and the
steering will change automatically to lock position from off position.
- Opening any door
- Operating door request switch on door handle
- Operating Intelligent Key
Power supply position change table by push-button ignition switch
operation
The power supply position changing operation can be performed with the
following operations.
Note:
- When an Intelligent Key is within the detection area of inside key
antenna and when Intelligent Key backside
is contacted to push-button ignition switch, it is equivalent to the
operations below.
- When starting the engine, the BCM monitors under the engine start
conditions:
- Brake pedal operating condition
- Selector lever position
- Vehicle speed
Vehicle speed: less than 4 km/h (2.5 MPH)

Vehicle speed: 4 km/h (2.5 Mph) or more

Emergency stop operation
- Press and hold the push-button ignition switch for 2 seconds or more.
- Press the push-button ignition switch 3 times or more within 1.5
Seconds.
Precaution for supplemental restraint system (srs) "air bag" and "seat belt
pre-tensioner"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE- ...
Common item
Common item : consult function (bcm - common item)
Application item
Consult performs the following functions via can communication with bcm.
System application
Bcm can perform the ...
Other materials:
Ecu diagnosis information
Av control unit
Reference value
TERMINAL LAYOUT
PHYSICAL VALUES
Dtc index
...
Exhaust manifold
Exploded View
CALIFORNIA
Air fuel ratio sensor
Exhaust manifold heat shield (upper)
Exhaust manifold and three way catalyst
Exhaust manifold heat shield (rear)
Exhaust manifold heat shield (front)
Exhaust manifold gasket
Cylinder head
EXCEPT CALIFORNIA
Air fuel ratio ...
Connector symbols
Most of connector symbols in wiring diagrams are shown from the terminal
side.
Connector symbols shown from the terminal side are enclosed by
a single line and followed by the direction mark.
Connector symbols shown from the harness side are enclosed by
a double line and followed by the ...
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