Nissan Leaf. Manual - part 988

PCS

SYSTEM

PCS-35

< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

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SYSTEM

POWER DISTRIBUTION SYSTEM
POWER DISTRIBUTION SYSTEM : System Description

INFOID:0000000010120310

SYSTEM DIAGRAM

SYSTEM DESCRIPTION

• PDS (POWER DISTRIBUTION SYSTEM) is the system that BCM controls with the operation of power

switch and performs the power distribution to each power circuit. This system is used instead of the mechan-

ical power supply changing mechanism with the operation of the conventional key cylinder.

• Power switch (push switch) can be operated when Intelligent Key is in the following condition.

- Intelligent Key is in the detection area of the interior antenna.

- Intelligent Key backside is contacted to power switch.

• Power switch (push switch) operation is input to BCM as a signal. BCM changes the power switch position

according to the status and operates the following relays to supply power to each power circuit.

- Ignition relay-1

- Ignition relay-2

- ACC relay

• The power switch position can be confirmed with the lighting of ACC/ON indicator in power switch (push

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 12V battery discharge.

• Power switch is in the ACC position

• All doors are closed

• Shift position is in the P position

Reset Condition of Battery Saver System

If any of the following conditions are met the battery saver system is released.

• Opening any door

• Operating with request switch on door lock

• Operating with Intelligent Key on door lock

• Press power switch (push switch), and power switch will change to ACC position from OFF position.

READY SET CONDITION TABLE BY POWER SWITCH OPERATION

Refer to 

SEC-12, "INTELLIGENT KEY SYSTEM/READY SET FUNCTION : System Description"

.

Fail-safe

INFOID:0000000010563595

FAIL-SAFE CONTROL BY DTC

BCM performs fail-safe control when any DTC are detected.

AWMIA1408GB

PCS-36

< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

SYSTEM

*: “ECM” is indicated on CONSULT display, however this means VCM on this vehicle.

REAR WIPER MOTOR PROTECTION

BCM detects the rear wiper stopping position according to the rear wiper stop position signal.

When the rear wiper stop position signal does not change for more than 5 seconds while driving the rear

wiper, BCM stops power supply to protect the rear wiper motor.

Condition of cancellation

1. More than 1 minute is passed after the rear wiper stop.

2. Turn rear wiper switch OFF.

3. Operate the rear wiper switch or rear washer switch.

FAIL-SAFE CONTROL OF COMBINATION SWITCH READING FUNCTION CAUSED BY LOW
POWER SUPPLY VOLTAGE

If voltage of battery power supply lower, BCM maintains combination switch reading to the status when input

voltage is less than approximately 9 V.

NOTE:

When voltage of battery power supply is approximately 9 V or more, combination switch reading function

returns to normal operation.

Display contents of CONSULT

Fail-safe

Cancellation

B2192: ID DISCORD BCM-ECM*

Inhibit setting the vehi-
cle to READY

Erase DTC

B2193: CHAIN OF BCM-ECM*

Inhibit setting the vehi-
cle to READY

Erase DTC

B2195: ANTI-SCANNING

Inhibit setting the vehi-
cle to READY

Power switch ON 

→ OFF

B2196: DONGLE NG

Inhibit setting the vehi-
cle to READY

Erase DTC

B2198: IMMOBI ANT NG

Inhibit setting the vehi-
cle to READY

Erase DTC

B261E: FUEL MIS CONFIG

Inhibit setting the vehi-
cle to READY

When the VCM status signal is normally received from VCM.

B26F1: IGN RELAY OFF STUCK

Inhibit setting the vehi-
cle to READY

When the following conditions are fulfilled
• Power switch ON signal (CAN: Transmitted from BCM): ON
• Power switch ON signal (CAN: Transmitted from IPDM E/R): ON

B26F2: IGN RELAY ON STUCK

Inhibit setting the vehi-
cle to READY

When the following conditions are fulfilled
• Power switch ON signal (CAN: Transmitted from BCM): OFF
• Power switch ON signal (CAN: Transmitted from IPDM E/R): OFF

B26F7: LF DRIVER COMMUNI-
CATION

Inhibit setting the vehi-
cle to READY

When inside key antennas function normally

U0415: VDC CAN CIRC2

Inhibit setting the vehi-
cle to READY

When vehicle speed signal (Meter) (CAN) is received normally

PCS

DIAGNOSIS SYSTEM (BCM)

PCS-37

< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

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DIAGNOSIS SYSTEM (BCM)

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

INFOID:0000000010563598

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions.

INTELLIGENT KEY

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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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

×

×

×

Trunk open

TRUNK

×

Vehicle security system

THEFT ALM

×

×

×

RAP system

RETAINED PWR

×

Signal buffer system

SIGNAL BUFFER

×

TPMS

AIR PRESSURE MONITOR

×

×

×

×

PCS-38

< SYSTEM DESCRIPTION >

[POWER DISTRIBUTION SYSTEM]

DIAGNOSIS SYSTEM (BCM)

INTELLIGENT KEY : CONSULT Function (BCM - INTELLIGENT KEY)

INFOID:0000000010563599

SELF DIAGNOSTIC RESULT

Refer to 

BCS-48, "DTC Index"

.

DATA MONITOR

ACTIVE TEST

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 power switch.

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 power switch received from IPDM E/R on CAN commu-
nication 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 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.

DOOR STAT -DR [LOCK/READY/UNLK]

×

Indicates condition of driver side door status.

DOOR STAT -AS [LOCK/READY/UNLK]

×

Indicates condition of passenger side door status.

ID OK FLAG [Set/Reset]

Indicates condition of Intelligent Key ID.

PRMT ENG STRT [Set/Reset]

Indicates condition of engine start possibility.

RKE OPE COUN1 [0-19]

×

When remote keyless entry receiver receives the signal transmitted while oper-
ating the Intelligent Key, the numerical value starts changing.

RKE-LOCK [On/Off]

Indicates condition of lock signal from Intelligent Key.

RKE-UNLOCK [On/Off]

Indicates condition of unlock signal from Intelligent Key.

RKE-PANIC [On/Off]

Indicates condition of panic signal from Intelligent Key.

RKE-MODE CHG [On/Off]

Indicates condition of mode change signal from Intelligent Key.

Test Item

Description

INSIDE BUZZER

This test is able to check combination meter warning chime operation [Off/Take Out/Knob/
Key].