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
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- ...
Diagnosis system (BCM)
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:
Strg branch line circuit
Diagnosis procedure
1.Check connector
Turn the ignition switch off
Disconnect the battery cable from the negative terminal.
Check the terminals and connectors of the steering angle sensor for
damage, bend and loose connection
(unit side and connector side).
Is the inspection result ...
Eps branch line circuit
Diagnosis procedure
1.Check connector
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Check the terminals and connectors of the eps control unit for damage,
bend and loose connection (unit
side and connector side).
Is the inspection result norm ...
Diagnosis system (ipdm e/r) (without intelligent key system)
Diagnosis Description
AUTO ACTIVE TEST
Description
In auto active test, the IPDM E/R sends a drive signal to the following
systems to check their operation.
Front wiper (LO, HI)
Parking lamp
License plate lamp
Tail lamp
Front fog lamp (if equipped)
Headlamp (LO, HI)
A/C compress ...
