Nissan Murano. Manual - part 327

 

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Nissan Murano. Manual - part 327

 

 

DEF-4

< SYSTEM DESCRIPTION >

REAR WINDOW DEFOGGER SYSTEM

SYSTEM DESCRIPTION

REAR WINDOW DEFOGGER SYSTEM

WITH BOSE SYSTEM

WITH BOSE SYSTEM : System Diagram

INFOID:0000000009722486

WITH BOSE SYSTEM : System Description

INFOID:0000000009722487

Operation Description

• Turn rear window defogger switch ON when the ignition switch is turned ON. Then multifunction switch (rear

window defogger switch) transmits rear window defogger switch signal to AV control unit via AV communica-
tion. AV control unit transmits rear window defogger switch signal to BCM via CAN communication.

• BCM turns rear window defogger relay ON and transmits rear window defogger control signal to IPDM E/R

via CAN communication when rear window defogger switch signal is received.

• Rear window defogger and door mirror defogger (with door mirror defogger) are supplied with power and

operate when rear window defogger relay turns ON.

• IPDM E/R transmits rear window defogger control signal to AV control unit via CAN communication. 
• AV control unit transmit rear defogger indicator signal to multifunction switch (rear window defogger switch)

via AV communication. then rear window defogger indicator is illuminated.

Timer function

• BCM turns rear window defogger relay ON for approximately 15 minutes when rear window defogger switch

is turned ON. It makes rear window defogger and door mirror defogger (with door mirror defogger) operate.

• Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns

rear window defogger relay OFF. The same reaction also occurs during timer operation, if the ignition switch
is turned OFF. 

INPUT/OUTPUT SIGNAL CHART

*: With door mirror defogger

JMLIA0005GB

Switch

Input signal to BCM

BCM function

Actuator

Rear window defogger switch

Defogger switch signal

Rear window defogger & Door mir-

ror defogger

*

 control

Rear window defogger

Door mirror defogger 

*

Push button ignition switch

Ignition signal

REAR WINDOW DEFOGGER SYSTEM

DEF-5

< SYSTEM DESCRIPTION >

C

D

E

F

G

H

I

J

K

M

A

B

DEF

N

O

P

WITH BOSE SYSTEM : Component Parts Location

INFOID:0000000009722488

WITH BOSE SYSTEM : Component Description

INFOID:0000000009722489

*: 

With mirror defogger

WITHOUT BOSE SYSTEM

1.

BCM

2.

IPDM E/R

3.

Rear window defogger switch
(built-in multifunction switch)

4.

Rear window defogger connector

5.

AV control unit

A.

Dash side lower (passenger side)

B.

Engine room dash panel (LH)

C.

Behind rear pillar finisher (LH)

D.

Behind cluster lid C

JMLIA0119ZZ

BCM

• Operates the rear window defogger with the operation of rear window defogger switch.
• Performs the timer control of rear window defogger.

Rear window defogger relay

• Operates the rear window defogger and the door mirror defogger with the control signal from 

BCM.

IPDM E/R

• Transmit rear window defogger control signal to  AV control unit via CAN communication.

Multifunction switch
(Rear window defogger 
switch)

• The rear window defogger switch is installed.
• Turns the indicator lamp ON when detecting the operation of rear window defogger.

AV control unit

• Displays the rear window defogger ON to the display when detecting the operation of rear win-

dow defogger.

Rear window defogger

• Heats the heating wire with the power supply from the rear window defogger relay to prevent 

the rear window from fogging up.

Door mirror defogger

*

• Heats the heating wire with the power supply from the rear window defogger relay to prevent 

the door mirror from fogging up.

DEF-6

< SYSTEM DESCRIPTION >

REAR WINDOW DEFOGGER SYSTEM

WITHOUT BOSE SYSTEM : System Diagram

INFOID:0000000009722490

WITHOUT BOSE SYSTEM : System Description

INFOID:0000000009722491

Operation Description

• Turn rear window defogger switch ON when the ignition switch is turned ON. Then A/C control unit (rear win-

dow defogger switch) transmits rear window defogger switch signal to A/C auto amp.. transmits rear window
defogger switch signal to BCM.

• BCM turns rear window defogger relay ON and transmits rear window defogger control signal to IPDM E/R

via CAN communication when rear window defogger switch signal is received. 

• Rear window defogger and door mirror defogger (with door mirror defogger) are supplied with power and

operate when rear window defogger relay turns ON. 

• Rear window defogger relay transmits rear window defogger control signal to A/C auto amp. when rear win-

dow defogger operates. 

• A/C auto amp. transmit rear window defogger indicator signal to A/C control unit (rear window defogger

switch). Then rear window defogger indicator is illuminated.

Timer function

• BCM turns rear window defogger relay ON for approximately 15 minutes when rear window defogger switch

is turned ON. It makes rear window defogger and door mirror defogger (with door mirror defogger) operate.

• Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns

rear window defogger relay OFF. The same reaction also occurs during timer operation, if the ignition switch
is turned OFF. 

INPUT/OUTPUT SIGNAL CHART

*: With door mirror defogger

JMLIA0127GB

Switch

Input signal to BCM

BCM function

Actuator

Rear window defogger switch

Defogger switch signal

Rear window defogger & Door mir-

ror defogger

*

 control

Rear window defogger

Door mirror defogger 

*

Push button ignition switch

Ignition signal

REAR WINDOW DEFOGGER SYSTEM

DEF-7

< SYSTEM DESCRIPTION >

C

D

E

F

G

H

I

J

K

M

A

B

DEF

N

O

P

WITHOUT BOSE SYSTEM : Component Parts Location

INFOID:0000000009722492

WITHOUT BOSE SYSTEM : Component Description

INFOID:0000000009722493

*: 

With door mirror defogger

1.

BCM

2.

IPDM E/R

3.

Rear window defogger switch
(built-in A/C control unit)

4.

Rear window defogger connector

5.

A/C auto amp

A.

Dash side lower (passenger side)

B.

Engine room dash panel (LH)

C.

Behind rear pillar finisher (LH)

D.

Behind cluster lid C

JMLIA0128ZZ

BCM

• Operates the rear window defogger with the operation of rear window defogger switch.
• Performs the timer control of rear window defogger.

Rear window defogger relay

• Operates the rear window defogger and the door mirror defogger with the control signal from 

BCM.

IPDM E/R

• Transmit rear window defogger control signal to ECM via CAN communication.

A/C control unit
(Rear window defogger 
switch)

• The rear window defogger switch is installed.
• Turns the indicator lamp ON when detecting the operation of rear window defogger.

A/C auto amp.

• Displays the rear window defogger ON to the display when detecting the operation of rear win-

dow defogger.

Rear window defogger

• Heats the heating wire with the power supply from the rear window defogger relay to prevent 

the rear window from fogging up.

Door mirror defogger

*

• Heats the heating wire with the power supply from the rear window defogger relay to prevent 

the door mirror from fogging up.

 

 

 

 

 

 

 

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