Infiniti QX56 (Z62). Manual - part 1024

PWC-8

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SYSTEM

SYSTEM

System Diagram

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System Description

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POWER WINDOW OPERATION

• Power window system is activated by power window switch operation when ignition switch turns ON, or dur-

ing the retained power operation after ignition switch turns OFF.

• Power window main switch can open/close door glass.
• Front and rear power window switch can open/close the corresponding door glass.
• Power window lock switch can lock all power windows other than driver seat.
• All power windows close when pressing Intelligent Key lock button or unlock button for 3 seconds.
• If door glass receives resistance that is the specified value or more while power window of each seat is in

AUTO-UP operation, power window operates in the reverse direction.

• Power window serial link transmits the signals from power window main switch to each power window

switch.

• AUTO-UP/DOWN operation can be performed when front power window switch turns to AUTO.

POWER WINDOW AUTO-OPERATION

• AUTO-UP/DOWN operation can be performed when each power window motor turns to AUTO.
• Encoder continues detecting the movement of power window motor and output the encoder pulse signal to

power window switch   while power window motor is operating.

• Power window switch reads the changes of encoder signal and stops AUTO operation when door glass is at

fully opened/closed position.

• Power window motor is operable in case encoder is malfunctioning.
• AUTO function does not operate if encoder is malfunctioning.

POWER WINDOW SERIAL LINK

Power window main switch, front power window switch (passenger side), rear power window switch LH/RH
and BCM transmit and receive the signal by power window serial link.

JMKIA5147GB

SYSTEM

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The signal mentioned below is transmitted from BCM to power window main switch, front power window
switch (passenger side) and rear power window switch LH/RH.
•  Keyless power window down signal
•  Door switch signal
The signal mentioned below is transmitted from power window main switch to front power window switch (pas-
senger side) and rear power window switch LH/RH.
• Front passenger side door window and rear door window operation signal
• Power window control by door key cylinder switch signal
• Power window lock switch signal
• Retained power operation signal 

RETAINED POWER OPERATION 

• Retained power operation is an additional power supply function that enables power window system to oper-

ate during the 45 seconds even when ignition switch is turned OFF.

Retained Power Function Cancel Conditions

• Front door CLOSE (door switch OFF)

→

OPEN (door switch ON).

• When ignition switch is ON again.
• When timer time passes. (45 seconds)

POWER WINDOW LOCK FUNCTION

Ground circuit inside power window main switch shuts off when power window lock switch is ON. This inhibits
power window switch operation except with the power window main switch.

ANTI-PINCH OPERATION

• Anti-pinch foreign lowers door glass 150 mm (5.9 in) when foreign material is pinched in door glass during

AUTO-UP operation.

• Encoder continues detecting the movement of power window motor and output the encoder pulse signal to

power window switch l while power window motor is operating.

• Resistance is applied to the power window motor rotation that changes the frequency of encoder pulse sig-

nal if foreign material is trapped in the door glass.

• Power window switch controls to lower the door glass for 150 mm (5.9 in) after it detects encoder pulse sig-

nal frequency change.

Operation Condition

When all door glass AUTO-UP operation is performed (anti-pinch function does not operate just before the
door glass closes and is fully closed)
NOTE:
Depending on environment and driving conditions, if a similar impact or load is applied to the door glass, it
may lower.

DOOR KEY CYLINDER SWITCH OPERATION

Hold the door key cylinder to the LOCK or UNLOCK direction for 1.5 seconds or more to OPEN or CLOSE all
power windows when ignition switch is OFF. In addition, it stops when key position is moved to NEUTRAL
when operating.

Operation Condition

• Ignition switch OFF.
• Hold door key cylinder to LOCK position for 1.5 seconds or more to perform CLOSE operation of the door

glass.

• Hold door key cylinder to UNLOCK position for 1.5 seconds or more to perform OPEN operation of the door

glass.

KEYLESS POWER WINDOW DOWN FUNCTION

All power windows open when the unlock button on Intelligent Key is activated and kept pressed for more than
3 seconds with the ignition switch OFF. The windows keep opening if the unlock button is continuously
pressed.
The power window opening stops when the following operations are performed.
• When the unlock button is kept pressed more than 15 seconds.
• When the ignition switch is turned ON while the power window opening is operated.
• When the unlock button is released.
While retained power operation activate, keyless power window down function cannot be operated.

PWC-10

< SYSTEM DESCRIPTION >

SYSTEM

Keyless power window down operation function can be changed by “PW DOWN SET” in “WORK SUPPORT”
mode of “INTELLIGENT KEY” of “BCM” using CONSULT-III. Refer to 

DLK-41, "INTELLIGENT KEY : CON-

SULT-III Function (BCM - INTELLIGENT KEY)"

.

NOTE:
Use CONSULT-III to change settings.
MODE 1 (3 sec) / MODE 2 (OFF) / MODE 3 (5 sec)

Fail-safe

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FAIL-SAFE CONTROL

Switches to fail-safe control when malfunction is detected in encoder signal that detects up/down speed and
direction of door glass. Switches to fail-safe control when a signal that is out of the specified value is detected
between the fully closed position and the actual position of the glass.

If fail-safe control, the system changes to a non-initialized condition and the following function do not operate.
• Auto-up operation
• Anti-pinch function
• Retained power function

When fail-safe control is activated, perform initialization procedure to recover. If a malfunction is detected in
power window switch or more, fail-safe control is activated again.

Malfunction

Malfunction condition

Pulse sensor malfunction

When one pulse signal that is the specified value or more is detected continuously for the specified 
time or more, while door glass is being operated UP or DOWN.

Both pulse sensors mal-
function

When both pulse signals are not detected continuously for the specified time or more, while door 
glass is being operated UP or DOWN.

Pulse direction malfunc-
tion

When a pulse signal indicating that window is moving in the opposite direction against the power win-
dow motor is detected for the specified value or more, while door glass is being operated UP or 
DOWN.

Glass recognition position 
malfunction 1

When the actual door glass position that is out of specified value is detected compared to the door 
glass fully closed position memorized in module, while door glass is being operated UP or DOWN.

Glass recognition position 
malfunction 2

When pulse count that is out of the door glass full stroke value or more is detected, while door glass 
is being operated UP or DOWN.

DIAGNOSIS SYSTEM (BCM)

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DIAGNOSIS SYSTEM (BCM)

COMMON ITEM

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

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APPLICATION ITEM

CONSULT-III performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.

×

: Applicable item

*: This item is indicated, but not used.

FREEZE FRAME DATA (FFD)

The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on
CONSULT-III.

Diagnosis mode

Function Description

Work Support

Changes the setting for each system function.

Self Diagnostic Result

Displays the diagnosis results judged by BCM. Refer to 

BCS-57, "DTC Index"

.

CAN Diag Support Monitor

Monitors the reception status of CAN communication viewed from BCM. Refer to CONSULT-III opera-
tion manual.

Data Monitor

The BCM input/output signals are displayed.

Active Test

The signals used to activate each device are forcibly supplied from BCM.

Ecu Identification

The BCM part number is displayed.

Configuration

• Read and save the vehicle specification.
• Write the vehicle specification when replacing BCM.

System

Sub system selection item

Diagnosis mode

Work Support

Data Monitor

Active Test

Door lock

DOOR LOCK

×

×

×

Rear window defogger

REAR DEFOGGER

×

×

Warning chime

BUZZER

×

×

Interior room lamp timer

INT LAMP

×

×

×

Exterior lamp

HEAD LAMP

×

×

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps

FLASHER

×

×

×

—

AIR CONDITONER*

×

×

• Intelligent Key system
• Engine start system

INTELLIGENT KEY

×

×

×

Combination switch

COMB SW

×

Body control system

BCM

×

NATS

IMMU

×

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

×

Back door

TRUNK

×

Vehicle security system

THEFT ALM

×

×

×

RAP system

RETAINED PWR

×

Signal buffer system

SIGNAL BUFFER

×

×