Nissan Murano. Instruction — 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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