Nissan March K13. Manual - part 493

PCS-54

< PRECAUTION >

[POWER DISTRIBUTION SYSTEM]

PRECAUTIONS

5.

When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)

6.

Perform self-diagnosis check of all control units using CONSULT-III.

PCS

COMPONENT PARTS

PCS-55

< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

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SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000005998898

Component Description

INFOID:0000000005998899

BCM

INFOID:0000000005998900

BCM controls the various electrical components and simultaneously supplies power according to the power
supply position.
BCM checks the power supply position internally.

Ignition Relay

INFOID:0000000005998901

BCM turns ON the following relays to ignition power supply to each ECU when the ignition switch is turned
ON.
• Ignition relay
• Ignition relay (inside IPDM E/R)
• Blower relay
BCM checks any ignition relay ON request for consistency with the actual ignition relay operation status.

1.

IPDM E/R
Refer to 

PCS-5, "Component Parts 

Location"

2.

Push-button ignition switch

3.

Stop lamp switch

4.

Transmission range switch
Refer to TM section.

5.

BCM
Refer to 

BCS-5, "BODY CONTROL 

SYSTEM : Component Parts Loca-
tion"

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BCM

Reference

IPDM E/R

PCS-6

Ignition relay (Built-in IPDM E/R)

PCS-55

Ignition relay

Accessory relay

PCS-56

Blower relay

PCS-56

Stop lamp switch

SEC-10

Transmission range switch

SEC-10

Push-button ignition switch

SEC-10

PCS-56

< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

COMPONENT PARTS

Accessory Relay

INFOID:0000000005998902

BCM controls the various electrical components and simultaneously supplies power according to the power
supply position.
BCM checks the power supply position internally.

Blower Relay

INFOID:0000000005998903

BCM turns ON the following relays to ignition power supply to each ECU when the ignition switch is turned
ON.
• Ignition relay
• Ignition relay (inside IPDM E/R)
• Blower relay
BCM checks any blower relay ON request for consistency with the actual blower relay operation status.

Push-Button Ignition Switch

INFOID:0000000005998904

BCM transmits the change in the power supply position with the push-button ignition switch to IPDM E/R via
CAN communication line. IPDM E/R transmits the power supply position status via CAN communication line to
BCM.

PCS

SYSTEM

PCS-57

< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

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SYSTEM

System Diagram

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System Description

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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. Refer to

Engine Start Function for details.

- Intelligent Key is in the detection area of the interior 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 (inside IPDM E/R)
- Ignition relay
- Accessory relay
- Blower relay

NOTE:
The push-button ignition 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 near the push-button ignition

switch.

BATTERY SAVER SYSTEM

When all the following conditions are met for 60 minutes, the battery saver system will cut off the power supply
to prevent battery discharge.
• The ignition switch is in the ACC position
• All doors are closed
• Selector lever is in the P 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 on P position and the ignition switch is left on ACC position for 60 min-
utes. 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 with door request switch on door lock
• Operating with Intelligent Key on door lock
Press push-button ignition switch and ignition switch will change to ACC position from OFF position.

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