Nissan Pathfinder (2009 year). Manual — part 144
DEF-4
< FUNCTION DIAGNOSIS >
REAR WINDOW DEFOGGER SYSTEM
FUNCTION DIAGNOSIS
REAR WINDOW DEFOGGER SYSTEM
System Diagram
INFOID:0000000003935812
System Description
INFOID:0000000003935813
Operation Description
• Turn rear window defogger switch ON when the ignition switch is turned ON. Then A/C and AV switch
assembly (with auto A/C) or front air control (without auto A/C) transmits rear window defogger switch signal
to BCM.
• BCM transmits rear window defogger control signal to IPDM E/R and display unit (with auto A/C only) via
CAN communication when rear window defogger operates.
• IPDM E/R turns rear window defogger relay and heated mirror relay (if equipped) ON when rear window
defogger switch signal is received.
• Rear window defogger and door mirror defogger (if equipped) are supplied with power and operate when
rear window defogger relay and heated mirror relay (if equipped) turn ON.
• Rear window defogger ON is displayed when signal is received.
Timer function
• BCM turns rear window defogger relay and heated mirror relay (if equipped) ON for approximately 15 min-
utes when rear window defogger switch is turned ON while ignition switch is ON. It makes rear window
defogger and door mirror defogger (if equipped) operate.
• Timer is canceled after pressing rear window defogger switch again during timer operation. Then BCM turns
rear window defogger relay and heated mirror relay (if equipped) OFF. The same reaction also occurs during
timer operation, if the ignition switch is turned OFF.
INPUT/OUTPUT SIGNAL CHART
AWLIA1675GB
Switch
Input signal to BCM
BCM function
Actuator
Rear window defogger switch
Defogger switch signal
Rear window defogger & door mirror
defogger (if equipped) control
Rear window defogger
Door mirror defogger (if
equipped)
Ignition switch
Ignition signal
2009 Pathfinder
REAR WINDOW DEFOGGER SYSTEM
DEF-5
< FUNCTION DIAGNOSIS >
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Component Parts Location
INFOID:0000000003935814
Component Description
INFOID:0000000003935815
ALJIA0229ZZ
1.
A. Steering column assembly
B. BCM M18, M20 (view with instru-
ment lower panel LH removed)
2.
Rear window defogger switch M98,
M99 (with auto A/C) or M52 (without
auto A/C)
3.
A. Rear window defogger ground
connector D604
B. Rear window defogger connector
D651
4.
IPDM E/R E120, E122, E124
5.
Door mirror (door mirror defogger)
LH D4 (w/o ADP), D18 (with ADP)
RH D107 (w/o ADP), D118 (with
ADP) (if equipped)
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 (if equipped) with the control
signal from BCM.
Rear window defogger switch
• The rear window defogger switch is turned ON.
• Turns the indicator lamp ON when detecting the operation of rear window 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 (if
equipped)
• Heats the heating wire with the power supply from the heated mirror relay to prevent the door
mirror from fogging up.
2009 Pathfinder
DEF-6
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)
INFOID:0000000004393997
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.
1: With remote keyless entry system
2: With Intelligent Key
REAR WINDOW DEFOGGER
Diagnosis mode
Function Description
WORK SUPPORT
Changes the setting for each system function.
SELF-DIAG RESULTS
Displays the diagnosis results judged by BCM. Refer to
CAN DIAG SUPPORT MNTR
Monitors the reception status of CAN communication viewed from BCM.
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
• Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.
System
Sub system selection item
Diagnosis mode
WORK SUPPORT
DATA MONITOR
ACTIVE TEST
BCM
BCM
×
Door lock
DOOR LOCK
×
×
×
Rear window defogger
REAR DEFOGGER
×
Warning chime
BUZZER
×
×
Interior room lamp timer
INT LAMP
×
×
×
Remote keyless entry system
1
MULTI REMOTE ENT
×
×
×
Exterior lamp
HEAD LAMP
×
×
×
Wiper and washer
WIPER
×
×
×
Turn signal and hazard warning lamps
FLASHER
×
×
Air conditioner
AIR CONDITONER
×
Intelligent Key system
2
INTELLIGENT KEY
×
Combination switch
COMB SW
×
Immobilizer
IMMU
×
×
Interior room lamp battery saver
BATTERY SAVER
×
×
×
Back door open
TRUNK
×
×
RAP (retained accessory power)
RETAINED PWR
×
×
×
Signal buffer system
SIGNAL BUFFER
×
×
TPMS (tire pressure monitoring sys-
tem)
AIR PRESSURE MONITOR
×
×
×
Vehicle security system
PANIC ALARM
×
2009 Pathfinder
DIAGNOSIS SYSTEM (BCM)
DEF-7
< FUNCTION DIAGNOSIS >
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REAR WINDOW DEFOGGER : CONSULT-III Function (BCM - REAR DEFOGGER)
INFOID:0000000004393998
DATA MONITOR
Monitor Item
[Unit]
Description
IGN ON SW [ON/OFF]
Indicates condition of ignition switch in ON position
IGN ACC SW [ON/OFF]
Indicates condition of ignition switch in ACC position
REAR DEF SW [ON/OFF]
Displays “Press (ON)/other (OFF)” status determined with the rear window defogger switch
2009 Pathfinder
DEF-8
< COMPONENT DIAGNOSIS >
REAR WINDOW DEFOGGER SWITCH
COMPONENT DIAGNOSIS
REAR WINDOW DEFOGGER SWITCH
Description
INFOID:0000000003935819
• The rear window defogger is operated by turning the rear window defogger switch ON.
• Turns the indicator lamp in the rear window defogger switch ON when operating the rear window defogger.
Component Function Check
INFOID:0000000003935820
1.
CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
Check that the indicator lamp of rear window defogger illuminates with rear window defogger switch ON.
Is the inspection result normal?
YES
>> Rear window defogger switch function is OK.
NO
>> Refer to
DEF-8, "Diagnosis Procedure A/C and AV Switch Assembly"
"Diagnosis Procedure Front Air Control"
Diagnosis Procedure A/C and AV Switch Assembly
INFOID:0000000003935821
1.
CHECK A/C AND AV SWITCH ASSEMBLY (REAR WINDOW DEFOGGER SWITCH) CIRCUIT
Does rear window defogger switch operate normally?
Is the inspection result normal?
YES
>> Inspection End.
NO
>> GO TO 2
2.
CHECK HARNESS CONTINUITY
1.
Turn ignition switch OFF.
2.
Disconnect BCM and A/C and AV switch assembly.
3.
Check continuity between BCM connector (A) and A/C and AV switch assembly connector (B).
W/MID AUDIO SYSTEM OR W/BOSE AUDIO SYSTEM-W/O NAVI
W/BOSE AUDIO SYSTEM-W/NAVI
4.
Check continuity between BCM connector (A) and ground.
Is the inspection result normal?
YES
>> Replace A/C and AV switch assembly. Refer to
VTL-7, "Removal and Installation"
NO
>> Repair or replace harness.
Diagnosis Procedure Front Air Control
INFOID:0000000003935822
1.
CHECK FRONT AIR CONTROL (REAR WINDOW DEFOGGER SWITCH) CIRCUIT
Does rear window defogger switch operate normally?
Is the inspection result normal?
YES
>> Inspection End.
NO
>> GO TO 2
BCM connector
Terminal
A/C and AV switch
assembly connector
Terminal
Continuity
M18 (A)
9
M98 (B)
16
Yes
BCM connector
Terminal
A/C and AV switch
assembly connector
Terminal
Continuity
M18 (A)
9
M99 (B)
16
Yes
ALLIA0315ZZ
BCM connector
Terminal
Ground
Continuity
M18 (A)
9
No
2009 Pathfinder
REAR WINDOW DEFOGGER SWITCH
DEF-9
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2.
CHECK HARNESS CONTINUITY
1.
Turn ignition switch OFF.
2.
Disconnect BCM and front air control.
3.
Check continuity between BCM connector and front air control
connector.
4.
Check continuity between BCM connector and ground.
Is the inspection result normal?
YES
>> Replace front air control. Refer to
VTL-7, "Removal and Installation"
NO
>> Repair or replace harness.
BCM connector
Terminal
Front air control
connector
Terminal
Continuity
M18
9
M52
11
Yes
BCM connector
Terminal
Ground
Continuity
M18
9
No
LIIA2047E
2009 Pathfinder
DEF-10
< COMPONENT DIAGNOSIS >
REAR WINDOW DEFOGGER RELAY
REAR WINDOW DEFOGGER RELAY
Description
INFOID:0000000003935823
Power is supplied to the rear window defogger with BCM control.
Component Function Check
INFOID:0000000003935824
1.
CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT
Check that an operation noise of rear window defogger relay (located in IPDM E/R) can be heard when turning
the rear window defogger switch ON.
Is the inspection result normal?
YES
>> Rear window defogger relay power supply circuit is OK.
NO
>> Refer to
.
Diagnosis Procedure
INFOID:0000000003935825
1.
CHECK FUSES
Check if any of the following fuses in the IPDM E/R are blown.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.
CHECK REAR WINDOW DEFOGGER RELAY POWER SUPPLY CIRCUIT
1.
Turn ignition switch ON.
2.
Check voltage between IPDM E/R connector and ground.
Is the inspection result normal?
YES
>> Replace IPDM E/R. Refer to
PCS-33, "Removal and Installation of IPDM E/R"
.
NO
>> GO TO 3
3.
CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to
GI-49, "Intermittent Incident"
Is the inspection result normal?
YES
>>
Check the following.
• Battery power supply circuit.
• IPDM E/R.
NO
>> Repair or replace the malfunctioning parts.
COMPONENT PARTS
AMPERE
FUSE NO.
IPDM E/R
15A
46
IPDM E/R
15A
47
Terminals
Condition of rear
window defogger
switch
Voltage (V)
(Approx.)
(+)
(–)
IPDM E/R con-
nector
Terminal
E124
60
Ground
ON Battery
voltage
OFF
0
LIIA2190E
2009 Pathfinder
REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
DEF-11
< COMPONENT DIAGNOSIS >
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REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
Description
INFOID:0000000003935826
Heats the heating wire with the power supply from the rear window defogger relay to prevent the rear window
from fogging up.
Component Function Check
INFOID:0000000003935827
1.
CHECK REAR WINDOW DEFOGGER
Check that the heating wire of rear window defogger is heated when turning the rear window defogger switch
ON.
Is the inspection result normal?
YES
>> Rear window defogger is OK.
NO
>> Refer to
Diagnosis Procedure
INFOID:0000000003935828
1.
CHECK POWER SUPPLY CIRCUIT
1.
Turn ignition switch ON.
2.
Press the rear window defogger switch.
3.
Check voltage between rear window defogger connector and
ground.
Is the inspection result normal?
YES
>> GO TO 2
NO
>> GO TO 3
2.
CHECK GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect rear window defogger.
3.
Check continuity between rear window defogger connector and
ground.
Is the inspection result normal?
YES
>> GO TO 4
NO
>> Repair or replace harness.
3.
CHECK HARNESS CONTINUITY
Terminals
Condition of rear
window
defogger switch
Voltage (V)
(Approx.)
(+)
(–)
Rear window
defogger
connector
Terminal
D651
1
Ground
ON
Battery voltage
OFF
0
ALLIA0177ZZ
Rear window defogger connector
Terminal
Ground
Continuity
D604
2
Yes
ALLIA0178ZZ
2009 Pathfinder
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