Nissan Sentra. Instruction — part 677
PCS
COMPONENT PARTS
PCS-61
< SYSTEM DESCRIPTION >
[POWER DISTRIBUTION SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
INFOID:0000000009755854
Component Description
INFOID:0000000009755855
AWMIA1369ZZ
1.
IPDM E/R (contains Ignition relay-1)
2.
BCM (view with instrument panel re-
moved)
3.
Fuse block (J/B) (front)
4.
Fuse block (J/B) (back)
5.
Blower relay
6.
Ignition relay-2
7.
Accessory relay-1
8.
Push-button ignition switch
Component
Description
Push-button ignition switch
Push-button ignition switch (push switch) is pressed, and transmits the status signal to BCM and IPDM
E/R.
IPDM E/R
• IPDM E/R detects push-button ignition switch (push switch) status, and transmits push-button ignition
switch status signal (CAN) to BCM.
• IPDM E/R receives ignition relay (IPDM E/R) control signal and ignition switch ON signal (CAN) from
BCM, and controls ignition relay (built in IPDM E/R)
PCS-62
< SYSTEM DESCRIPTION >
[POWER DISTRIBUTION SYSTEM]
COMPONENT PARTS
BCM
• BCM controls power distribution system.
• BCM judges ignition switch position by push-button ignition switch (push switch) and vehicle condition
• BCM checks the ignition switch position internally.
Blower relay (in fuse block)
• Blower relay is controlled by BCM.
• Blower relay supplies the ignition switch ON power supply or the ignition switch ON signal to air con-
ditioning system when ignition switch is turned ON.
• BCM compares status of blower relay control signal and ignition switch position judged by BCM.
Accessory relay-1 (in fuse
block)
• Accessory relay is controlled by BCM.
• Accessory relay supplies the accessory power supply or the ignition switch ACC signal to each ECU
when ignition switch is turned ACC or ON.
• BCM compares status of accessory relay control signal, and ignition switch position judged by BCM.
Ignition relay-2 (in fuse
block)
• Ignition relay is controlled by BCM.
• Ignition relay supplies the ignition switch ON power supply or the ignition switch ON signal to each
ECU and system when ignition switch is turned ON.
• BCM compares status of ignition relay control signal and ignition switch position judged by BCM.
• BCM monitors the ignition relay operating status by the ignition relay feedback signal.
Component
Description
PCS
SYSTEM
PCS-63
< SYSTEM DESCRIPTION >
[POWER DISTRIBUTION SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
SYSTEM
POWER DISTRIBUTION SYSTEM
POWER DISTRIBUTION SYSTEM : System Diagram
INFOID:0000000009755856
POWER DISTRIBUTION SYSTEM : System Description
INFOID:0000000009755857
SYSTEM DESCRIPTION
• PDS (POWER DISTRIBUTION SYSTEM) is the system that BCM controls with the operation of the push-
button 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 posi-
tion 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 posi-
tion 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
AWMIA1512GB
PCS-64
< SYSTEM DESCRIPTION >
[POWER DISTRIBUTION SYSTEM]
SYSTEM
POWER SUPPLY POSITION CHANGE TABLE BY PUSH-BUTTON IGNITION SWITCH OPERA-
TION
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.
Power supply position
Engine start/stop condition
Push-button ignition switch
operation frequency
Selector lever position
Brake pedal operation condition
OFF
→ ACC
—
Not depressed
1
OFF
→ ACC → ON
—
Not depressed
2
OFF
→ ACC → ON → OFF
—
Not depressed
3
OFF
→ START
ACC
→ START
ON
→ START
P or N position
Depressed
1
Engine is running
→ OFF
—
—
1
Power supply position
Engine start/stop condition
Push-button ignition switch
operation frequency
Selector lever position
Brake pedal operation condition
Engine is running
→ ACC
—
—
Emergency stop operation
Engine stall return operation
while driving
N position
Not depressed
1
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