Nissan Pathfinder. Manual - part 890

PCS-36

< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

SYSTEM

SYSTEM

POWER DISTRIBUTION SYSTEM
POWER DISTRIBUTION SYSTEM : System Diagram

INFOID:0000000009175211

POWER DISTRIBUTION SYSTEM : System Description

INFOID:0000000009175212

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

- Front blower motor 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

ALMIA0608GB

PCS

SYSTEM

PCS-37

< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

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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

PCS-38

< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

DIAGNOSIS SYSTEM (BCM)

DIAGNOSIS SYSTEM (BCM)

COMMON ITEM
COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)

INFOID:0000000009764050

CAUTION:

After disconnecting the CONSULT vehicle interface (VI) from the data link connector, the ignition must

be cycled OFF 

→ ON (for at least 5 seconds) → OFF. If this step is not performed, the BCM may not go

to ”sleep mode”, potentially causing a discharged battery and no-start condition. 

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions.

Direct Diagnostic Mode

Description

Ecu Identification

The BCM part number is displayed.

Self Diagnostic Result

The BCM self diagnostic results are displayed.

Data Monitor

The BCM input/output data is displayed in real time.

Active Test

The BCM activates outputs to test components.

Work support

The settings for BCM functions can be changed.

Configuration

• The vehicle specification can be read and saved.
• The vehicle specification can be written when replacing BCM.

CAN Diag Support Mntr

The result of transmit/receive diagnosis of CAN communication is displayed.

System

Sub System

Direct Diagnostic Mode

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Active T

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CAN Diag 

Su

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 Mn

tr

Door lock

DOOR LOCK

×

×

×

×

Rear window defogger

REAR DEFOGGER

×

×

×

Warning chime

BUZZER

×

×

Interior room lamp timer

INT LAMP

×

×

×

Exterior lamp

HEADLAMP

×

×

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps FLASHER

×

×

Air conditioner

AIR CONDITIONER

×

Intelligent Key system

INTELLIGENT KEY

×

×

×

×

Combination switch

COMB SW

×

BCM

BCM

×

×

×

×

×

Immobilizer

IMMU

×

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

Back door open

TRUNK

×

Vehicle security system

THEFT ALM

×

×

×

RAP system

RETAINED PWR

×

PCS

DIAGNOSIS SYSTEM (BCM)

PCS-39

< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

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INTELLIGENT KEY
INTELLIGENT KEY : CONSULT Function (BCM - INTELLIGENT KEY)

INFOID:0000000009764051

CAUTION:

After disconnecting the CONSULT vehicle interface (VI) from the data link connector, the ignition must

be cycled OFF 

→ ON (for at least 5 seconds) → OFF. If this step is not performed, the BCM may not go

to ”sleep mode”, potentially causing a discharged battery and no-start condition. 

SELF DIAGNOSTIC RESULT

Refer to 

BCS-52, "DTC Index"

.

DATA MONITOR

Signal buffer system

SIGNAL BUFFER

×

TPMS

AIR PRESSURE MONITOR

×

×

×

×

System

Sub System

Direct Diagnostic Mode

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CAN Diag 

Support Mntr

Monitor Item [Unit]

Main

Description

REQ SW -DR [On/Off]

×

Indicates condition of door request switch LH.

REQ SW -AS [On/Off]

×

Indicates condition of door request switch RH.

REQ SW -BD/TR [On/Off]

×

Indicates condition of back door request switch.

PUSH SW [On/Off]

Indicates condition of push-button ignition switch.

SHFTLCK SLNID PWR SPLY [On/Off]

×

Indicates condition of power supply to shiftlock solenoid.

BRAKE SW 1 [On/Off]

×

Indicates condition of brake switch.

BRAKE SW 2 [On/Off]

Indicates condition of brake switch.

DETE/CANCL SW [On/Off]

×

Indicates condition of P (park) position.

SFT PN/N SW [On/Off]

×

Indicates condition of P (park) or N (neutral) position.

UNLK SEN -DR [On/Off]

×

Indicates condition of door unlock sensor.

PUSH SW -IPDM [On/Off]

Indicates condition of push-button ignition switch received from IPDM E/R on 
CAN communication line.

IGN RLY1 -F/B [On/Off]

Indicates condition of ignition relay 1 received from IPDM E/R on CAN commu-
nication line.

DETE SW -IPDM [On/Off]

Indicates condition of detent switch received from TCM on CAN communication 
line.

SFT PN -IPDM [On/Off]

Indicates condition of P (park) or N (neutral) position from TCM on CAN com-
munication line.

SFT P -MET [On/Off]

Indicates condition of P (park) position from TCM on CAN communication line.

SFT N -MET [On/Off]

Indicates condition of N (neutral) position from IPDM E/R on CAN communica-
tion line.

ENGINE STATE [STOP/START/CRANK/
RUN]

×

Indicates condition of engine state from ECM on CAN communication line.

VEH SPEED 1 [mph/km/h]

×

Indicates condition of vehicle speed signal received from ABS on CAN commu-
nication line.

VEH SPEED 2 [mph/km/h]

×

Indicates condition of vehicle speed signal received from combination meter on 
CAN communication line.